Find cheap flights from San Francisco to Seattle

SFO - SEA

Find cheap flights from San Francisco to Seattle

Search hundreds of travel sites at once for deals on flights to Seattle

Round-trip
Economy
San Francisco (SFO)
Seattle/Tacoma Intl
Fri 6/18
Fri 6/25
Any month
Compare vs. KAYAK |

Good to know

Low season

FebruaryBest time to beat the crowds with an average 10% drop in price.

High season

DecemberMost popular time to fly with an average 18% increase in price.

Average price round-trip

$164(avg. price over the last 2 weeks)

Good deal round-trip

$117or less

Good deal one-way

$76or less

When to book flights from San Francisco to Seattle

Estimated round-trip price
Average price per month
Flight prices as travel date approaches

Top tips for finding a cheap flight

  • Looking for a cheap flight? 25% of our users found flights on this route for $76 or less one-way and $117 or less round-trip.
  • The cheapest flight from San Francisco to Seattle was found 26 days before departure, on average.
  • Book at least 3 weeks before departure in order to get a below-average price.
  • High season is considered to be November, December and January. The cheapest month to fly is February.
  • Morning departure is around 9% more expensive than an evening flight, on average*.
  • What trip to the San Francisco area is complete without a bit of wine tasting? If you missed out this trip, or you did not get your fill, then SF Uncork'd is just what the doctor ordered. Located in Terminal 3 near Gate 85 in San Francisco International Airport, this bar offers a large selection of all varieties of wines by the glass, including a unique selection of wine flights.
  • One unique business you usually do not find at an airport comes the San Francisco Museum of Modern Art Store, located in the International Terminal of San Francisco International Airport. Not only is this a great place to just browse and wonder, it also features great gifts and even offers excellent coffee.
  • Who does not love a brand new gadget or the latest piece of technology? If this sounds like you, then InMotion Entertainment is just your type of place. Located in the International Terminal of San Francisco International Airport, this store features headphones, cameras, and travel solutions like backpacks and travel pillows.
  • When looking for a Seattle hotel that is both convenient and affordable, there may be no better choice than the Hilton Seattle Airport & Conference Center. This hotel features a 24-hour complimentary airport shuttle service, is close to the rail station that can quickly bring you to downtown Seattle, has two separate business centers with free WiFi and remote printing, and houses a fitness center with whirlpool.
  • What says Seattle better than a booming and lively music scene? This is just as true at Seattle Tacoma International Airport, where you will find the Sub Pop Store. Imagine having a complete record store tucked away in an airport -- that is what you will find at Sub Pop. Located in the Central Terminal of Seattle Tacoma International Airport, this store may enchant you so much you may forget to ever leave the airport.
*Average of the lowest prices shown in KAYAK’s search results for departures within the next 30 days

FAQs for booking flights from San Francisco to Seattle

Which airlines have a flexible cancellation policy for flights from San Francisco to Seattle due to COVID-19?

Which airlines apply social distancing measures on flights from San Francisco to Seattle due to COVID-19?

How long does a flight from San Francisco to Seattle take?

How many flights are there between San Francisco and Seattle?

Which airlines provide the cheapest flights from San Francisco to Seattle?

Do I need a passport to fly between San Francisco and Seattle?

Which airlines fly most frequently between San Francisco and Seattle?

What’s the cheapest day of the week to fly from San Francisco to Seattle?

Which airports will I be using when flying from San Francisco to Seattle?

Is bag storage available at Seattle Tacoma International Airport?

Is there a private area at Seattle Tacoma International Airport that nursing mothers can use?

Does Seattle Tacoma International Airport have a cell phone lot?

If I have brought along my pet on my flight from San Francisco to Seattle in an animal carrier, where can I pick it up after my flight?

How does KAYAK find such low prices on flights from San Francisco to Seattle?

How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from San Francisco to Seattle?

What is the Hacker Fare option on flights from San Francisco to Seattle?

What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from San Francisco to Seattle?

Top 5 airlines serving San Francisco to Seattle/Tacoma Intl

Scores according to KAYAK customer reviews

8.3
Alaska Airlines
Overall score based on 29,418 reviews
8.5
Boarding
8.3
Comfort
8.8
Crew
7.9
Entertainment
7.9
Food
Airline reviews

Pros: "It was a short flight"

Cons: "the new saver fare option sucks, it makes travel more stressful and very undignified"

Pros: "Quick, efficient, affordable, quality, great movie selection."

Pros: "Staff great"
Cons: "Same old movies"

Cons: "Dirty cabin, dirty glass, worn out carpet, seats falling apart, filthy privacy crew drapes. The CEO needs to be more hands on and do random inspections."

Pros: "Check in was easy. I love the way you can order from the screen infront of your seat food and drinks. In addition; you can select movies. Everyone was very nice and professional. I usually fly with jetBlue, but today I was so impressed I am considering changing."

Cons: "If there was a less than one star that is what they deserve. SFO flight was late. They gave away my seat on my connection to Kalispell. They basically blamed me for being late and not being there on time. Two others from my flight were allowed to make the connection but told me that they gave my seat away because I was late. We all showed up at the same time from the late flight. I talked to 3 people including customer service and did not get a single “I’m Sorry”. Do they not communicate with each other when a flight is late and they have passengers for connections running late? They told me they don’t talk. The best they can do is put me standby for 9:30 flight and if I cannot get on that flight I have to wait until morning. My daughter is in a competition tomorrow morning and thanks to Alaska Airlines I’m going to miss it. I’m sitting here writing this review, paying for a dinner I should not be paying for and probably searching out a hotel room until morning when I can catch a flight. Unbelievable the lack of empathy."

Pros: "Free prosecco"
Cons: "Took an hour to leave"

Pros: "Arriving at destination"
Cons: "The flight was delayed 90 minutes and there was very little communication regarding why. It would have been less frustrating if we knew the reason for the delay."

Pros: "I love that it was still a Virgin plane - please keep them as long as you can!"
Cons: "Happy with everything!"

Pros: "There is nothing about this flight that my girlfriend and I liked. This was the worst experience with an airline either of us have ever experienced."
Cons: "We didn't like that we were delayed so long that we missed our connecting flight. We were delayed upwards of 3.5 hours and watched a flight going to the same place that was supposed depart 1 hour after us, and it left 30 minutes before us."

Pros: "Alaska is great as always and try to fly with them when traveling!"

Pros: "Nothing to complain about. It was comfortable."

Cons: "Alaska/virign’s boarding process is pretty dumb. all these different levels of people, which for a regional airline is usually 75% of the load, then, the rest. Good luck on overhead space. Literally everything else about this airline is 100% awesome. Boarding is the only lame thing."

Pros: "I was so impressed by the friendly and efficient boarding process and the on-time departure and landing."
Cons: "USB outlet was loose so cord would fall out (this was true when I flew another Alaska flight earlier in the week as well). Only free snack offering was cookids; prefer a snack with less sugar."

Cons: "I checked in to the flight 24 hours ahead to ensure I got an aisle seat, because I knew I’d probably be going back and forth from the bathroom because I had been feeling ill. When I got to the ticket check to board the flight, my name wasn’t found in the system, and I was turned away to go back to the front desk. So I did, and the person there was seemingly able to get me an aisle seat in the same row, just across from where I originally was. But, when I got to the row, another man was in that spot and showed me his ticket which was the same seat I’d seemingly been re-assigned! The middle seat was empty, and so I sat there for the time being, while we enquired about it. One of the flight attendants said they’d look into it, but just seemed to brush it off and never gave us a response. I was mainly annoyed about being shuffled around, getting reassigned a spot and was clear about wanting an aisle seat, and it never happened even though I chose that seat 24 hours ahead in the first place. I felt there were a few chances to make it right, but it never happened."

Pros: "The staff is wonderfully patient."
Cons: "Gate changes, delays, presence of plane but lack of crew, food vouchers 15 minutes before venue closed. Uncomfortable seats."

Pros: "Very professional and nice crew."
Cons: "Same as above"

Pros: "Ground personnel were kind, empathetic and helpful to me as my home was burned down in the Santa Rosa fire. Flight personnel were friendly, funny, professional, and attentive,.The plane was clean and my checked luggage was out inunder 15 minutes enabling me to catch the shuttle that left SeaTac 1/2 an hour after landing."
Cons: "Nothing"

Pros: "Missed my flight at it was rescheduled for $25 without asking a questions"
Cons: "nothing"

Pros: "Everything"
Cons: "Nothing"

Cons: "Better vegan snacks available for purchase would be great."

Pros: "Same as before."

Cons: "lost luggage.......two days...............................19 miles away."

Pros: "1. Boarding appeared streamlined. 2. Plugs ins for tech. 3. Coffee smelled amazing. 5. Seat size seemed larger than most airplanes."
Cons: "1. Wifi or gogo did not connect. 2. It was a tad bit cold."

Pros: "the ease of booking"

Pros: "Excellent service. I would fly this airline again!"

Pros: "Would be better to allow blue Tooth headsets to view tv/movies did not have wired head phones and did not want to purchase them."

Pros: "Over an hour late leaving San Francisco, over an hour late leaving Seattle! One delay after another. Spent more time in airports than on planes"
Cons: "Delays!"

Pros: "Medical emergency on board, crew kept calm. Luckily there was a doctor on the flight, he and the crew attended to the passenger. Reassuring to see such a professional team."
Cons: "N/A"

Pros: "There's not much to say.The flight was short, only a couple of hours, and I slept thru the small goodies' handouts. Anh their WIfi is free."

Pros: "Seats were comfy"
Cons: "Delayed and no head rest tv screens :( Flew with my two kids those sure make a difference on how my flight goes"

Pros: "The cabin was miserably hot"

Pros: "My flight was delayed by two hours, but I got to go on the earlier flight (that left at my original time), and they even gave me a Premium seat!"

Pros: "Nothing. I didn't take flight due to punishing re book procedure that Alaska employs to basically steal money from it's customers."
Cons: "They weight the value of 1st leg much higher than the return AND they want to charge you $125 change fee. My grandma passed away and I needed to reschedule my itinerary. Alaska stuck to their policies (you know, those pages of microscopic text that is written by lawyers for sole reason of screwing the customer.) I just felt really abused; told them to keep the useless "credit". I booked with Delta. At what point does a company forget who they are supposed to be serving? Perhaps the people that are actually giving you money and keeping you in business?"

Pros: "First Class was so comfortable. The attendants were efficient and attentive, and the breakfast meal was delicious."
Cons: "I wish there was a dinner meal, but the cookies were delicious too!"

Cons: "needed more water"

Cons: "I went to the Intl terminal and asked a Virgin employee where to go and they told me to go to domestic. The Virgin employee at domestic told me to go back to Intl, and the Alaska employee told me I should have arrived earlier. I was upset that they were not helpful but I understand this was also my fault for not realizing I was on an Alaska flight in the beginning."

Pros: "Everything"
Cons: "Everything"

Pros: "The two flight attendants in the aft cabin were an absolute delight.They made the flight a great experience."
Cons: "The captain announced we would arrive early in Seattle and we were in fact late."

Pros: "More comfortable than i thought it would be. Very friendly crew."
Cons: "My luggage is missing. :("

Cons: "Crew does not communicate well. Customer service is very poor."

Pros: "I appreciate the steward giving me something to eat for breakfast."

Pros: "Play more Christmas carol during Christmas season"

Cons: "I'm still waiting to board FIVE hours delayed."

Cons: "they lost my partner's luggage by our last stop"

Pros: "Gina at Seattle Customer Service managed to get my on a flight back to my original Oregon location when it became evident that they couldn't get me to San Francisco as booked and I missed my appointments there."
Cons: "I never made it to San Francisco. After starting in Eugene they sent me to Seattle instead of Portland where I was way-laid for 5 and 1/2 hours Alaska posted a crew based delay on my flight to PDX and booked me on a flight an hour later to Seattle where I was going to have a 3 hour layover. The connecting flight was then delayed another 2 and 1/2 hours. I missed both my appointments in San Francisco and never made it to SFO. Also, they never sent me an SMS or email alert to the changes. The agent also had me wait at the wrong gate in Eugene. And they couldn't get me on any other flights to my original destination. I will reschedule my appointments in San Francisco and I will definitely be taking American Airlines or United Airlines."

Pros: "everything"
Cons: "no complains"

Pros: "This flight was fine. It wasn't really anything to write home about - nobody went above and beyond; nothing was terrible. It could have been better, though. The flight actually landed a bit early, which was nice since it was a bit of a late flight."
Cons: "Pretzels. The in-flight snack was pretzels, which is innocuous and also super boring. Also, no entertainment to speak of."

Pros: "Cleanliness. Safety. Friendly."

Pros: "Crew was solid."
Cons: "Don’t change my seat. Not on time. No food. Luggage with legally checked firearm sent to the wrong airport."

Pros: "Decent entertainment options and snack offerings."
Cons: "Last 6-8 rows were vacant and for some reason Someone was still seated directly next to me. Why on earth the flight attendants (otherwise great) didn’t make an announcement that there was no need to share a row and encourage people to spread out is beyond me. I mean this is the only flight I can remember in a decade that wasn’t nearly or fully booked, you’d think they’d emphasize that. Instead I got to be trapped like it was a full flight next to a guy with no concept of personal space."

Cons: "Space on airplanes"

Pros: "On time"

Cons: "The cabin temperature was very hot"

Cons: "Luggage drop was severely understaffed. We had checked in, had boarding passes but there was a 45 minute wait just to drop off a checked bag."

Cons: "Food"

Pros: "Smooth, efficient and timely."
Cons: "Seats weren’t assigned until at the gate even though checked in 18 hours before. Bag drop was horrible. No self service. Was inline for about 45 minutes."

Pros: "delayed, switched to another flight, delayed 3 times...crossed the border at 1am...terrible experience overall"
Cons: "everything"

Cons: "Food is always bad."

Pros: "New plane with good features. I was very comfortable."

Cons: "Connection at Schiphol often tricky;"

Pros: "Check in person was very helpful in rerouting our flight."
Cons: "Our flight was delayed 3-1/2 hours. The gate crew booked us in another flight but did not issue a ticket, so after transferring to another terminal, we were sent back to the Delta terminal to be issued a ticket to a third airline since we already missed the second flight. Then, they lost our luggage"

Cons: "My monitor isn’t really working after rebooted. And the audio hole wasn’t tight enough"

Pros: "the plane was pretty empty"
Cons: "The times available were terrible!"

Cons: "Better food and more water."

Cons: "It made no sense to board an hour and a half before takeoff."

Cons: "Change the movies more ofti"

Pros: "the food was really top notch and service was great and friendly"

Pros: "free movies on the flight"
Cons: "The check-in process at SFO airport was poorly managed."

Pros: "Quick boarding process"
Cons: "Wifi stopped working halfway"

Cons: "Great"

Pros: "Everything was fine. Delta did a great job."
Cons: "The kid screaming in my ear for 3 hours"

Pros: "Delta Comfort om commuter jet"

Pros: "Flew us safely home."
Cons: "We waiting on the runway for over a long period."

Pros: "Total Experience of Flying on this Airline ."
Cons: "No Comment."

Pros: "Had the whole Comfort section to myself!"

Cons: "Cramped seating for premium Econ"

Pros: "I like Delta but this crew had such a shi**y attitude it was contagious. Yikes!"
Cons: "The gate staff and the flight staff. Rude"

Pros: "It’s was super smooth! Fast service and great customer service."
Cons: "The intercom was a little messed up."

Pros: "It was short and fast."

Pros: "Loved how close the gates were"
Cons: "Nothing"

Pros: "Delta did a really good job as always. Cheaper, more comfortable, and a WAY better experience than Alaska Airlines."
Cons: "Nothing."

Pros: "Not much . The boarding process took forever and the lines through TSA took longer .. no direction to lines and I was standing for 10 min before saying something to someone and they said o there’s another line."
Cons: "Almost everything besides the staff on the plane"

Pros: "The t.v. 's at each seat"
Cons: "Nothing"

Pros: "Kara was really nice to us."
Cons: "Noisy plane."

Pros: "None of it!! Poor selection"
Cons: "All of it. Again poor selection"

Cons: "One lavatory didn't work and we had to use the nathroom for first class..couldnt access bathroom half of the flight"

Cons: "I was starving because of my short connection time and couldn't have lunch - wanted to eat something solid and they just had boxes with fruits and cheese."

Pros: "I always have a great experience on Delta! Thank you"

Cons: "Snacks if possible"

Cons: "horrible boarding management in SJC."

Pros: "Individual screen and USB port"
Cons: "No issues that could be controlled I.e. Person in seat in front for mine leaning way ......"

Pros: "Bags arrived on the belt quickly"
Cons: "Why is there not saying precheck to use after you've been funneled through customs? ATL is advanced enough to have kiosk for arrival, even for those confused and not with global entry, but then forces you to wait in security line instead of the typically faster tea precheck line. Every minute I'm in line, I'm not spending money"

Pros: "Very informative staff"
Cons: "Was late"

Pros: "Quick boarding"
Cons: "The delta comport seats were not comfort seats were hardly comfortable and the leg room wasn't worth paying for."

Cons: "Enforce your baggage size and number limits. A significant number of passengers take bags onboard that are oversized."

Pros: "On time"

Cons: "half-broken screen, couldn't access anything on the left side"

Pros: "The boarding process was very smooth and we took off early and the crew was great and then we also arrived 30 minutes early."
Cons: "Nothing could be changed."

Cons: "No delays"

Pros: "Nothing"
Cons: "Everything"

Cons: "It is what it is, doesn’t have to be better"

Pros: "seat was basic. prefer having tv screens in the seatbacks as opposed to using my tiny phone as a viewing screen."
Cons: "prefer having tv screens in the seatbacks as opposed to using my tiny phone as a viewing screen. only food available besides pretzel was pay food."

Cons: "Wider seating"

Pros: "nice entertainment when you use the AA app."
Cons: "Unbelievable turbulent and bumpy ride. Not AA's fault but the question was "how was the trip?" It was a white-knuckle ride."

Pros: "that it's over."
Cons: "sat on tarmac for 45 minutes! AFTER landing... unacceptable."

Cons: "The gate agents called all boarding groups with the boarding queue extending the entire length of the jet bridge and into the terminal beyond the gate area, making us stand in line ten to fifteen minutes longer for no reason."

Pros: "Comfortable"

Cons: "Weather related, mostly, so not AA’s fault"

Pros: "great entertainment"

Pros: "Puntual, connexion gates very closed,"
Cons: "I need to paid 100$ or more to have a seat"

Pros: "Everything no complain"
Cons: "I like everything Everything no complain"

Pros: "Service and boarding was smooth and friendly."

Pros: "Nothing"
Cons: "The seat assignments based on loyalty status - rude gate agents"

Cons: "Breakfast - lots of sugary items"

Pros: "Both the departing and returning flights departed in schedule and arrived a solid half hour early. Staff was accommodating and friendly, and very helpful with me juggling luggage and a toddler by myself."

Pros: "N"

Pros: "The flights were on time and the staff was very friendly."

Pros: "Delayed and no AC working..."

Pros: "Good friendly service. Flights were on time."

Cons: "I'm getting to Madrid 24 hrs after I was supposed to"

Pros: "Early for arrival!! Love that!"

Cons: "no charging station"

Pros: "Did not use"
Cons: "Tight seating"

Cons: "I got to Moscow, SVO. I didn't receive my bag. This sucks."

Pros: "The food was great!"
Cons: "The new baggage rule limits you to two bags in business on international flights☹️"

Pros: "Pilot did good job in tricky conditions at landing."
Cons: "Wish food were served."

Cons: "Dry / borderline rude staff and hostess. Dated plane. Tiny seats. But that is pretty much the baseline of airlines in the US. When will carriers start to take note from International carriers..leaps and bounds ahead."

Pros: "Everything was on time and luggage arrived at my final destination"
Cons: "Free wifi would be amazing :)"

Pros: "NOTHING"

Pros: "Good service, as efficient as possible"

Pros: "Headrest entertainment systems"
Cons: "Lack of comfort in the seat, pay for every little thing, departed late, 90% of all passengers seems to be lumped in "Group 6" making boarding extremely annoying. I suppose any other group costs extra."

Pros: "Delayed"

Pros: "No food at all."

Cons: "Late by 40 min"

Cons: "Longer flights should have screens in the headrests"

Pros: "The comfortable sitting and good hospitality by staff. Timely departure and smooth landing of aircraft."
Cons: "Nothing"

Pros: "Na"
Cons: "AA worst airline People They have working in SFO Incompetent Rude Useless"

Cons: "It was delayed for about a half an hour. Other than that it was great"

Cons: "Delays"

Pros: "Lots of free movies."
Cons: "No free food."

Cons: "it was really bumpy"

Pros: "Nothing"
Cons: "See above comments"

Cons: "I was told I had to check my duffle bag at the gate, that there was no room for it. When I dot to my dirty seat I found room for three of my bags in the overhead compartment."

Cons: "Pathetic airline service especially towards senior citizens.. One of the worst airline.. Poor baggage tracking system and Etihad staff lacks knowledge about their own airline.."

Pros: "On time arrival despite two issues at the departure gate"

Pros: "Nothing...I had to be rerouted to Chicago to Seattle!"
Cons: "The fact that through no fault of my own, I arrived in Seattle much later than expected and my clients were not particularly happy with the delay."

Cons: "Out of certain food items that should have been available"

Pros: "On time flight"
Cons: "Gate agent at SF was rude and unprofessional. While waiting, gate agent at gate 65, flight 647 started the following, “group 1 boarding, group 2 boarding...everybody, let’s go let’s go”. She went on to call out one, Hispanic customer with limited English, “come here, you can board now”, rude rude."

Pros: "Love the ability to watch films on my device by way of United WiFi"
Cons: "Better snacks"

Pros: "Better staff"
Cons: "Still terrible"

Pros: "united is united"

Pros: "Liked the exit row."
Cons: "Hated the delay of more than 90 minutes."

Pros: "Good boarding"
Cons: "Delay and no food or movies"

Pros: "The fact that we actually left."
Cons: "Delayed and upset passengers. Bad breath from passengers circulating in the AC. FA we're okay nothing above and beyond."

Pros: "Free movies and TV shows through the United app"

Cons: "Bags separated at boarding when there was overhead space left on plane and gate agent saying "no space left"..."

Cons: "Entertainment cut in/out"

Pros: "On time."
Cons: "Impolite gate crew, screen and wifi not working. No outlet at seat. United has successfully become Spirit's number one competitor for worst airline."

Cons: "In Osaka I was not able to get a boarding pass for this last leg. In SF United and Air China were both not able to give me a boarding pass because I was not listed in their system. I have no idea why. Very frustrating."

Cons: "Second mechanical delay for me on this trip with United and the plane felt very old and rickity. Extremely delayed into Seattle until 2:40am"

Cons: "P"

Pros: "Staff was very good at their job/duties."
Cons: "Seats were uncomfortable and cramped."

Pros: "Boarding quickly"
Cons: "Delayed"

Pros: "Every day they take more away from us....the paying customer. ALL major carriers are becoming LCC ( low cost carriers ). Are there no real domestic airlines left. I REALLY miss Continental."
Cons: "I used to enjoy flying. Now I dtead it. There is NOTHING to look forward to. These days you get to pick lhe lesser of all evils. Is there an airline out there that REALLY wants me as a customer???"

Pros: "On time"

Pros: "Smooth flight"
Cons: "No blanket"

Pros: "United Airlines is a poor excuse for travel options. Definitely two or three levels below European owned airlines. We are fine with Alaska Airlines, but the rest of American own airline companies take a back seat."
Cons: "Nothing about this flight was enjoyable."

Pros: "I arrived safely."
Cons: "It's a zoo. It's a DIY of checking in and checking your bags in. No staff is around to help. You are on your own. Unorganized."

Cons: "Late late late. Had to run to get my connection. Not Uniteds fault though. SFO too busy. Will avoid in future."

Pros: "Nothing"
Cons: "No entertainment"

Cons: "Take off and landing both were horrible."

Pros: "The flight attendants were as great as they could be given the situation."
Cons: "Sat next to someone quite large I had to squash myself uncomfortable every time someone needed the restroom. This happened frequently as our plane was discovered to have electrical problems immediately before takeoff. Our flight was delayed 2 hours because of this."

Cons: "30 min delays on both ends."

Cons: "Narrowness of seating."

Cons: "Long delay"

Pros: "Cheap fare"
Cons: "Nothing"

Cons: "Staff was rude and it was some what ok"

Pros: "The morning cookie was good."
Cons: "It was dirty."

Pros: "Alaska's coach seats were a dream compared to united"

Pros: "No charging docks on plane as military duffle bag open with clothing hanging out on arrival ~ not sure if anything stolen but the threat is very real and it's unacceptable for military bags to be delivered in that manner"

Pros: "Lovely flight with an attentive crew and nice amenities"

Pros: "We were delayed due to some maintenance issues, but the crew did a great job of keeping us updated on what was happening. Other than that, a normal flight."

Pros: "All fights.. On time made it home safely Friendly crew both ways.."
Cons: "Entertainment should be easier to access.. And Free!!"

Cons: "That you must pay to be able to watch basic TV. Other airlines have free TV or play a movie for you."

Cons: "One of the crew members at the gate! I believe her name was Jackie or jaciquiene at SF was the most inconsecrate women I have ever met! She was yelling at me to put my bag in the bag to see if it will fit. She was completely rude and acted like she hated her job! I will NEVER fly with UNITED again! I will be contacting United regarding this issue as well! The other lady at the gate called her led and after that she contacted her supervisor and they also didn't let me on the flight! This was the worst experience I have EVER had! I will NEVER FLY WITH UNITED AGAIN."

Pros: "Food was good"

Pros: "Our names are Steve and Jan Hovde if you have any other questions about our flight concerns. We can be reached by phone at 360-332-8414. We did not call FAA, but still very much a concern. We have flown United other times and many other airlines and many Boeing 737's...we noticed other passengers looking at each other because of the clunking and growling sounds."
Cons: "most important I vowed I would try and call FAA about safety concerns with the plane. Mechanical noises prior to take off , during flight(right fan whine) - could hear it when started engines in SF., Some loud clunking at take off bringing in landing wheels and again letting down for landing in Seattle. When plane came to stop at the gate, again some noises we have never heard before on 737's. Please check out that plane more closely. Part of our concern is that Pilot mentioned before take off that they had problems with scheduled 737 and they needed extra time to locate another 737 that could be used(Why our take off was rescheduled twice and different gate)......it seemed that one that had been mothballed may have been brought out to use......We did mention some of this tactfully to stewardess' standing near exit when we got off the plane(She seemed surprised and wondered what we were talking about. We were so thankful we made it. We just figured that flight crew would be tracking these odd noises and pass along to captain if he couldn't hear."

Cons: "Horrible airline"

Pros: "That they stored my carrion that didn't fit overhead for free"
Cons: "Overhead was to small"

Cons: "Showed up at airport w 2 15 yr olds traveling alone. We're told we needed to pay $150 each way. We were NOT told when tix were purchased. Accused of lying about the girls ages when we booked. Tix were booked and paid by two different parents and times. Agent relented and waived fee. At the gate we were again challenged and had to go thru it all again. No more United for us!"

Cons: "Confusions on dates from Internet. Your site usually sets its own dates without confirming."

Cons: "I nearly missed getting a cup of ice as the refreshment cart went up the isle. The attendant tried to give me a small sack of "snacks" instead. I had to repeat myself, over the back of our seats, two more times before I got my cup of ice. I said Thanks! But the look on the attendant's (male, black) face said I wasn't "welcome"."

Cons: "Should load the plane from the back rather from the front. People in the back can sort their stuff while still be able to load people into the front."

Pros: "Flight crew was attentive and kind."
Cons: "We had to sit on the Tarmac for 20 minutes before taking off due to low cloud cover over Seattle."

Pros: "While waiting in the terminal for everyone to board and the plane to be cleared you got your options of watching everything on the Direct TV headrest screens. It was interesting to see what people watched at 1am (4am my time)."
Cons: "Received another handful of snack mix, which was fine. At least I knew not to eat it this time. Once the plan took off, the headrest screens asked you to pay some ridiculous amount of money to watch them for the hour that we were on the plan. I wasn't surprised, but I never found out who killed the lady in my show. Bummer."

Cons: "Horrible overlay"

Pros: "Booked on kayak, assigned a middle seat with a lap infant (ridiculous!) There were no aisle or window seats available but gate agent was able to move us to a bulkhead so at least we had enough leg room to accommodate us both. Thank you United, but thumbs down to auto seat assignments."

Cons: "Negative leg room, Hugh bag fees that were not stated in the original purchase"

Cons: "It’d be nice to have internet access, whether free or for purchase"

Cons: "Delays"

Pros: "I arrived."
Cons: "It was an hour after boarding before take off. Another 15 minutes on the ground after landing waiting for a gate at midnight on a weekday. I understand that circumstances occur beyond the airlines control, but this has been routinely occurring on my trips with Frontier. Absent compelling reasons, I will not be flying with them again."

Pros: "Getting to Seattle to get away from the airline"

Pros: "As above."
Cons: "As above"

Cons: "Unexplained delay is not ok."

Pros: "Staff was awesome and efficient"
Cons: "Food options, especially since one has to purchase snacks."

Cons: "It was seriously delayed"

Pros: "Staff was friendly."
Cons: "No food or entertainment and nickle and dimed on everything."

Pros: "See above."

Pros: "All"

Pros: "not much"
Cons: "boarding process was a disaster. no one knew what they were doing. $30 for a carry? seriously? No free snack on the plane. Everything cost $5-$10... never again will i fly Frontier."

Cons: "Charging for carry ins makes me never want to fly frontier again"

Cons: "We sat on the tarmac for about 1.5 hours in Denver before we could leave the plane."

Pros: "Nothing."
Cons: "Everything."

Cons: "4 hr delay due to personnel issues"

Cons: "Trip had over 8 hours of delays."

Pros: "Cheap ticket"
Cons: "I felt nickle and dimes for everything"

Pros: "Cheap"
Cons: "Seat cannot be declined! Plane also made an awful noise when taking off and landing!"

Cons: "We boarded 30 minutes late and therefore took off and landed 30 minutes late without any acknowledgement whatsoever. It seemed almost nonchalant that everything was a half hour behind schedule, and there was no explanation. Not awesome."

Pros: "Quick efficient"
Cons: "Legroom"

Pros: "Airbus jet was nice. Frontier credit card sign-up was offered."

Pros: "Absolutely nothing to like about frontier. You get worse than you pay for with frontier."

Cons: "I had to pay $9 for 2 cans of soda and 2 small snacks. You could only pay be credit card and it had the option of leaving a tip! They charge too much for little things that other airlines include for free."

Pros: "Nothing"
Cons: "Delays, late bags, poor service"

Cons: "delays with NO feedback"

Pros: "It was fun and playful!!! Never had such an amazing trip back to Houston."

Cons: "They nickle and dime you to death. They even charge you for soda!"

Pros: "Nothing, never use them again EVER"
Cons: "NOTHING0 ZILCH"

Pros: "stewardess was nice"
Cons: "late arrival in Denver, then, "not enough staff "to unload us and get us into the terminal-waited in plan almost an hour . 1 hour Late takeoff from Denver. plane seat does not recline, tight I wont take frontier again"

Pros: "Letting me in though I got a bit late to the gate, due to unexpectedly log TSA lined"

Cons: "We were left on the tarmac for 100 minutes after landing. Given No information; not allowed to get up for the bathroom. Terrible."

Pros: "The competence of the on board personnel."
Cons: "The lack of communication with passengers at the gate."

Cons: "Charged for every additional thing so the cost of the ticket was not true."

Pros: "Nothing"

Pros: "Upgraded us!"
Cons: "Told us the Wrong carrosol for our baggage."

Cons: "Horrible costumer service, charge $40 for a carry on"

Pros: "Boarding was quick"
Cons: "Nothing"

Pros: "same as above"
Cons: "same as above"

Pros: "See cooment above"
Cons: "See comments above"

Cons: "A little noisy"

Pros: "Nothing"
Cons: "3 hours of delay, no respect and appreciation of the wait."

Cons: "bag fees and slow boarding"

Pros: "nothing"
Cons: "everything"

Pros: "attendants were helpful and friendly"
Cons: "would like some reading materials since they don't have entertainment anymore."

Cons: "Finding that getting a seat costs extra"

Cons: "My mother did not get one of her bag back when we arrived in Seattle"

Cons: "Uncomfortable seating"

Cons: "Lots of delays"

Read more about Alaska Airlines
COVID-19 information

Safety measures for airlines flying from San Francisco to Seattle

Airlines flying from San Francisco to Seattle have enacted additional safety measures and adjusted policies to better accommodate travelers. Policies vary by airline.

Heightened sanitation

Daily cleaning, installation of cabin HEPA filters on flights from San Francisco to Seattle

Mandatory masks

Masks required on board, masks provided on flights from San Francisco to Seattle

Social distancing seating

Middle seats unavailable to book on flights from San Francisco to Seattle

Pre-flight testing

Testing for antibodies, testing for symptoms for flights from San Francisco to Seattle

Book cheap flights from San Francisco to Seattle

Recent round-trip flight deals

8/20
Fri
nonstop
Alaska Airlines
2h 20m
SFO - SEA
9/11
Sat
nonstop
Alaska Airlines
2h 05m
SEA - SFO
8/20
Fri
nonstop
Alaska Airlines
2h 15m
SFO - SEA
9/11
Sat
nonstop
Alaska Airlines
2h 05m
SEA - SFO
10/3
Sun
nonstop
Alaska Airlines
2h 10m
SFO - SEA
10/14
Thu
nonstop
Alaska Airlines
2h 05m
SEA - SFO
8/3
Tue
nonstop
Alaska Airlines
2h 08m
SFO - SEA
8/7
Sat
nonstop
Alaska Airlines
2h 13m
SEA - SFO
8/10
Tue
nonstop
Alaska Airlines
2h 15m
SFO - SEA
8/15
Sun
nonstop
Alaska Airlines
2h 13m
SEA - SFO
10/8
Fri
nonstop
Alaska Airlines
2h 05m
SFO - SEA
10/12
Tue
nonstop
Alaska Airlines
2h 10m
SEA - SFO
7/13
Tue
nonstop
Alaska Airlines
2h 08m
SFO - SEA
7/14
Wed
nonstop
Alaska Airlines
2h 13m
SEA - SFO
9/9
Thu
nonstop
Alaska Airlines
2h 05m
SFO - SEA
9/23
Thu
nonstop
Alaska Airlines
2h 10m
SEA - SFO
9/16
Thu
1 stop
United Airlines
8h 33m
SFO - SEA
9/20
Mon
nonstop
United Airlines
2h 09m
SEA - SFO
7/30
Fri
nonstop
Delta
2h 18m
SFO - SEA
8/6
Fri
nonstop
Delta
2h 22m
SEA - SFO
7/28
Wed
1 stop
Multiple Airlines
6h 44m
SFO - SEA
7/31
Sat
nonstop
Multiple Airlines
2h 13m
SEA - SFO
7/23
Fri
nonstop
Multiple Airlines
2h 08m
SFO - SEA
8/2
Mon
1 stop
Multiple Airlines
23h 15m
SEA - SFO
9/21
Tue
1 stop
United Airlines
8h 33m
SFO - SEA
9/24
Fri
nonstop
United Airlines
2h 19m
SEA - SFO
7/22
Thu
nonstop
Delta
2h 18m
SFO - SEA
7/31
Sat
nonstop
Delta
2h 22m
SEA - SFO
8/10
Tue
1 stop
Multiple Airlines
8h 14m
SFO - SEA
8/14
Sat
nonstop
Multiple Airlines
2h 15m
SEA - SFO
7/27
Tue
1 stop
United Airlines
13h 32m
SFO - SEA
7/30
Fri
nonstop
United Airlines
2h 06m
SEA - SFO
8/2
Mon
1 stop
Multiple Airlines
19h 03m
SFO - SEA
8/5
Thu
nonstop
Multiple Airlines
2h 15m
SEA - SFO
9/9
Thu
1 stop
United Airlines
8h 16m
SFO - SEA
9/23
Thu
nonstop
United Airlines
2h 09m
SEA - SFO
7/16
Fri
nonstop
Multiple Airlines
2h 08m
SFO - SEA
7/19
Mon
1 stop
Multiple Airlines
23h 15m
SEA - SFO
8/4
Wed
1 stop
United Airlines
7h 47m
SFO - SEA
8/17
Tue
nonstop
United Airlines
2h 06m
SEA - SFO
Show more results

Recent one-way flight & bus deals

7/13
Tue
nonstop
Alaska Airlines
2h 05m
SFO - SEA
9/22
Wed
1 stop
Alaska Airlines
6h 40m
SFO - SEA
10/15
Fri
nonstop
Delta
2h 23m
SFO - SEA
9/22
Wed
nonstop
Alaska Airlines
2h 10m
SFO - SEA
9/24
Fri
nonstop
Alaska Airlines
2h 10m
SFO - SEA
7/8
Thu
nonstop
Delta
2h 18m
SFO - SEA
7/28
Wed
1 stop
Frontier
6h 44m
SFO - SEA
8/17
Tue
1 stop
United Airlines
7h 47m
SFO - SEA
7/30
Fri
1 stop
Multiple Airlines
13h 41m
SFO - SEA
7/21
Wed
1 stop
American Airlines
12h 24m
SFO - SEA
6/24
Thu
2 stops
Multiple Airlines
21h 55m
C6O - SEA
6/24
Thu
2 stops
Multiple Airlines
21h 55m
C6O - SEA
7/1
Thu
2 stops
Greyhound
22h 35m
C6O - 40H
7/1
Thu
2 stops
Greyhound
22h 35m
C6O - 40H
7/1
Thu
2 stops
Greyhound
22h 35m
C6O - 40H
7/1
Thu
2 stops
Greyhound
22h 35m
C6O - 40H
7/1
Thu
2 stops
Greyhound
22h 35m
C6O - 40H
7/1
Thu
2 stops
Greyhound
22h 35m
C6O - 40H
7/2
Fri
2 stops
Greyhound
22h 35m
C6O - 40H
7/2
Fri
2 stops
Greyhound
22h 35m
C6O - 40H
Show more results
-
1
  • Round-trip
  • One-way
  • Multi-city
  • Trip Builder
  • Economy
  • Premium Economy
  • Business
  • First
  • Multiple
Economy
  • Economy
  • Premium Economy
  • Business
  • First
Economy
  • Economy
  • Premium Economy
  • Business
  • First
Economy
  • Economy
  • Premium Economy
  • Business
  • First
Economy
  • Economy
  • Premium Economy
  • Business
  • First
Economy
  • Economy
  • Premium Economy
  • Business
  • First
Economy
  • Economy
  • Premium Economy
  • Business
  • First