SFO - SEA

$79 Find Cheap Flights from San Francisco to Seattle

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from San Francisco to Seattle departing on 4/22. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

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

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from San Francisco to Seattle.
These are the airlines KAYAK users have selected most often from within our search results in flight searches from San Francisco to Seattle.
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Everything you should know

Cheapest round-trip
$130
Overall average: $237
Alaska Airlines
Sat 5/2Sat 5/9
SFO - SEA • Non-stop
Cheapest one-way
$79
Typical prices: $98-$278
United Airlines
Wed 4/22
SFO - SEA • Non-stop
Advice from real travelers
AI-powered summary based on content written by travel experts. AI can make mistakes.
Delta's Comfort Plus offers extra legroom on this route.
Use the Link light rail for a quick trip from SEA to downtown.
Expert advice
Expert advice
Expert advice
Expert advice
Top airlines
Cheapest • from $130 (round-trip)
Best reviews • 7.9 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Nonstop flights
You can fly direct with Alaska Airlines, Delta and United Airlines. Average duration is 2h 19m
Direct flights
Direct flights
+1
+1
Direct flights
Direct flights
+1
Avoid delays
Most punctual • 89% on-time
Best time • Fewest delays
Insights
Insights
Insights
Insights
When to book
in advance
Our data shows that travelers who book at least 4 weeks in advance save around 46% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
Cheapest • 18% price drop
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
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Flight Deals
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Expert advice
Flight Deals

Cheap Flights from San Francisco to Seattle (SFO-SEA)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from San Francisco to Seattle that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from San Francisco to Seattle

Sat, May 2 - Sat, May 9
Alaska Airlines Logo
7:59 pm - 10:18 pm
SFO
-
SEA
2h 19mnonstop
Alaska Airlines Logo
8:05 pm - 10:28 pm
SEA
-
SFO
2h 23mnonstop
$130Alaska Airlines
Sat, May 2 - Sat, May 9
Alaska Airlines Logo
7:59 pm - 10:18 pm
SFO
-
SEA
2h 19mnonstop
Alaska Airlines Logo
7:04 pm - 9:23 pm
SEA
-
SFO
2h 19mnonstop
$131Alaska Airlines
Tue, Apr 28 - Thu, Apr 30
Alaska Airlines Logo
2:00 pm - 4:17 pm
SFO
-
SEA
2h 17mnonstop
Alaska Airlines Logo
7:10 am - 9:27 am
SEA
-
SFO
2h 17mnonstop
$137Alaska Airlines
Thu, Apr 23 - Sun, Apr 26
Alaska Airlines Logo
9:10 pm - 11:29 pm
SFO
-
SEA
2h 19mnonstop
Alaska Airlines Logo
7:10 am - 9:27 am
SEA
-
SFO
2h 17mnonstop
$140Alaska Airlines
Wed, Apr 15 - Wed, Apr 22
Multiple Airlines Logo
1:35 pm - 3:52 pm
SFO
-
SEA
2h 17mnonstop
Multiple Airlines Logo
3:48 pm - 6:09 pm
SEA
-
SFO
2h 21mnonstop
$141Multiple Airlines
Thu, Apr 23 - Sun, Apr 26
Alaska Airlines Logo
7:00 am - 9:17 am
SFO
-
SEA
2h 17mnonstop
Alaska Airlines Logo
7:10 am - 9:27 am
SEA
-
SFO
2h 17mnonstop
$142Alaska Airlines
Thu, Apr 23 - Sat, Apr 25
United Airlines Logo
8:58 pm - 11:27 pm
SFO
-
SEA
2h 29mnonstop
United Airlines Logo
7:37 pm - 9:50 pm
SEA
-
SFO
2h 13mnonstop
$145United Airlines
Thu, Apr 23 - Sat, Apr 25
United Airlines Logo
8:58 pm - 11:27 pm
SFO
-
SEA
2h 29mnonstop
United Airlines Logo
5:45 pm - 7:58 pm
SEA
-
SFO
2h 13mnonstop
$146United Airlines
Fri, May 8 - Sun, May 10
Delta Logo
6:20 pm - 11:55 pm
SFO
-
SEA
5h 35m
1 stop
Delta Logo
7:15 am - 9:34 am
SEA
-
SFO
2h 19mnonstop
$147Delta
Wed, May 27 - Wed, May 27
Alaska Airlines Logo
8:23 am - 10:40 am
SFO
-
SEA
2h 17mnonstop
Alaska Airlines Logo
1:50 pm - 4:04 pm
SEA
-
SFO
2h 14mnonstop
$152Alaska Airlines
Booking Insights

KAYAK's insights & trends for San Francisco to Seattle flights

Get data-powered insights and trends into flights from San Francisco to Seattle to help you find the cheapest flights, the best time to fly and much more.

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

The average price of all round-trip flights from San Francisco to Seattle clicked on KAYAK for each day over the last 12 months.

When flying from San Francisco to Seattle, you should consider leaving on a Friday and avoid Sundays if you are looking for the best rates. For your return to San Francisco, you’ll find the best rates on Fridays and the most expensive ones on Sundays.

What is the cheapest month to fly from San Francisco to Seattle?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from San Francisco to Seattle, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from San Francisco to Seattle is February, where tickets cost $212 (return) on average. On the other hand, the most expensive months are November and March, where the average cost of round-trip tickets is $300 and $287 respectively.

How far in advance should I book a flight from San Francisco to Seattle?

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from San Francisco to Seattle, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price on the flight from San Francisco to Seattle, you should book around 4 weeks before departure, which saves you about 46% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 13 weeks before departure.

Expert advice

Expert advice for your flight from San Francisco to Seattle

 
AI-powered summary based on content written by travel experts. AI can make mistakes.
KAYAK teamed up with top travel experts to share the best tips for your journey.
Our travel experts
Harriet Baskas

Harriet Baskas

Expert on Alaska Airlines and SEA

Harriet is an award-winning journalist who is happiest in an airport or an unusual museum. Her stories about airports, air travel, and the business of travel have appeared on NBC News, CNBC, USA TODAY, The Points Guy and other outlets. She is the creator of the StuckatTheAirport.com blog and the author of nine books. When not out on the road or exploring the latest airport amenities, she’s home in Seattle getting ready for the next adventure.

Stefanie Waldek

Stefanie Waldek

Expert on United Airlines and Delta

Stefanie Waldek is a freelance space, travel, and design writer based in Saratoga Springs, NY. Her words have appeared in Space.com, Travel + Leisure, Condé Nast Traveler, Architectural Digest, and House Beautiful, among other publications. An expert in aviation and expedition cruising, Stefanie is frequently up in the air or on the sea, likely en route to Antarctica or the Arctic.

Blane Bachelor

Blane Bachelor

Expert on SFO

Blane Bachelor is a journalist and editor specializing in travel and aviation who writes regularly for top global outlets. Born and raised in Florida, Blane has worked and lived in four countries, including the Netherlands, where she’s currently based with her family. Her favorite way to get to know a new destination is by running or riding a bike around town – or hearing a spooky ghost story about local history. She will always choose the window seat.

KAYAK's tips to save more on a San Francisco to Seattle flight

Based on the flight data, the cheapest day to fly from San Francisco to Seattle is typically Tuesday, while the cheapest month to travel this route is generally January.

Booking Advance: Book your flight at least 172 days in advance for the best rates.

Cheapest Airline: Frontier Airlines generally offers the cheapest flights on this route.

Direct or Layover: Direct flights are typically more expensive, so consider flights with layovers to save money.

Specific Route: The cheapest route is directly from San Francisco (SFO) to Seattle (SEA).

AI-powered; AI can make mistakes.

Good to know

Low seasonJanuary
Cheapest flight$79
Best time to beat the crowds but there is an average 3% increase in price.
Most popular time to fly with an average 8% increase in price.
Flight from San Francisco to Seattle

When to book flights from San Francisco to Seattle

Are your dates flexible? Find out the best times to travel from San Francisco to Seattle based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from San Francisco to Seattle

  • What is the cheapest flight from San Francisco to Seattle?

    In the last 3 days, the lowest price for a flight from San Francisco to Seattle was $79 for a one-way ticket and $130 for a round-trip.

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

    No

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

    San Francisco and Seattle are both served by 1 main airport. You will leave San Francisco from San Francisco and will be arriving at Seattle/Tacoma Intl.

  • Which airlines offer Wi-Fi service onboard planes from San Francisco to Seattle?

    Alaska Airlines, Delta, JetBlue, and Asiana Airlines offer inflight Wi-Fi service on the San Francisco to Seattle flight route.

  • Which aircraft models fly most regularly from San Francisco to Seattle?

    The Boeing 737-800 Passenger/BBJ2 (winglets) is the aircraft model that flies most regularly on the San Francisco to Seattle flight route.

  • Which airline alliances offer flights from San Francisco to Seattle?

    SkyTeam, Star Alliance, and oneworld are the airline alliances operating flights between San Francisco and Seattle, with SkyTeam being the most commonly used for this route.

  • On which days can I fly direct from San Francisco to Seattle?

    There are nonstop flights from San Francisco to Seattle on a daily basis.

  • Which is the best airline for flights from San Francisco to Seattle, Alaska Airlines or Delta?

    The two airlines most popular with KAYAK users for flights from San Francisco to Seattle are Alaska Airlines and Delta. With an average price for the route of $279 and an overall rating of 7.9, Alaska Airlines is the most popular choice. Delta is also a great choice for the route, with an average price of $198 and an overall rating of 7.9.

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

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options 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?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Seattle from San Francisco is likely to change within 7 days, so travelers know whether to wait or book now.

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

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Seattle with an airline and back to San Francisco with another airline. Booking your flights between San Francisco and SEA can sometimes prove cheaper using this method.

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

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Seattle from San Francisco up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

KAYAK’s top tips for finding a cheap flight from San Francisco to Seattle

  • Looking for a cheap flight? 25% of our users found flights on this route for $165 or less one-way and $241 or less round-trip.

Prefer to fly direct from San Francisco to Seattle?

 
Direct data is based off flight results for the next 60 days. Find direct flights from all airlines flying direct from San Francisco to Seattle/Tacoma Intl.
Find which airlines fly direct from San Francisco Airport to Seattle/Tacoma Intl Airport, which days they fly and book direct flights.

Direct departures

San Francisco to Seattle/Tacoma Intl

Monday

Alaska Airlines,Delta,United Airlines

Alaska Airlines,Delta, +1 more

Tuesday

Alaska Airlines,Delta,United Airlines

Alaska Airlines,Delta, +1 more

Wednesday

Alaska Airlines,Delta,United Airlines

Alaska Airlines,Delta, +1 more

Thursday

Alaska Airlines,Delta,United Airlines

Alaska Airlines,Delta, +1 more

Friday

Alaska Airlines,Delta,United Airlines

Alaska Airlines,Delta, +1 more

Saturday

Alaska Airlines,Delta,United Airlines

Alaska Airlines,Delta, +1 more

Sunday

Alaska Airlines,Delta,United Airlines

Alaska Airlines,Delta, +1 more

See more direct flights

Direct returns

Seattle/Tacoma Intl to San Francisco

Monday

Alaska Airlines,Delta,United Airlines

Alaska Airlines,Delta, +1 more

Tuesday

Alaska Airlines,Delta,United Airlines

Alaska Airlines,Delta, +1 more

Wednesday

Alaska Airlines,Delta,United Airlines

Alaska Airlines,Delta, +1 more

Thursday

Alaska Airlines,Delta,United Airlines

Alaska Airlines,Delta, +1 more

Friday

Alaska Airlines,Delta,United Airlines

Alaska Airlines,Delta, +1 more

Saturday

Alaska Airlines,Delta,United Airlines

Alaska Airlines,Delta, +1 more

Sunday

Alaska Airlines,Delta,United Airlines

Alaska Airlines,Delta, +1 more

See more direct flights

Reviews of the top 5 airlines serving from San Francisco to Seattle

 
See real verified KAYAK customer reviews for airlines flying from San Francisco to Seattle. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from San Francisco to Seattle? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.9
Alaska AirlinesOverall score based on 12093 reviews
7.8Comfort
8.5Crew
7.0Entertainment
8.1Boarding
7.0Food
Airline reviews

Wi-Fi cut out for a bit, then resumed. Otherwise flawless flight.

10.0 ExcellentAdam, Mar 2026
SNA - SEA
Read more Alaska Airlines reviews

Wi-Fi cut out for a bit, then resumed. Otherwise flawless flight.

Ended up sitting in front of a child who kicked the back of the seat and screamed for most of the flight.

After landing in Seattle, 3 hours waiting to find parking space do to driving problems. Very uncomfortable.

They cancelled the flight and provided no support to find another way home or how to get a refund. Links provided didn’t work and phone wait times were over eight hours. Battery on my phone couldn’t last long enough.

signage from the upper area to the tram down 2 escalator!

Great flights, little turbulence, pilots kept stewardesses seated & safe, all staff friendly & professional

There is no entertainment on the plane. The snack is minimal. The crew was nice and professional.

in-flight wifi was not working well. also the cabin temperature was a bit hot.

Nice crew, healthy snacks and drinks available. Flight to Seattle was short and comfortable.

The plane not having any overhead bin space was inconvenient. Anytime my luggage has to be checked it ends up covered in scratches and that’s not covered by the airlines for replacement/repair. The WiFi did not work or was not offered for the flight from Seattle to Vancouver.

My flight was cencaled due with the bad weather on Sunday the crew was poorly mistaken my luggage supposed depart with my flight instead I didn’t have my luggage for almost 3 days the website is poorly respond to my complain until I have someone to do it my connection smooth their not even respon or email me even the have my luggage

8 hours late and the plane smelled like urine, that smell in the morning when your child wet the bed in the night.

Everything was good except wifi and a leaking drink chiller. The floor was all wet and my bag was soaked. Did not notice until debarking. Have not heard back from Delta. Even though this was leg one of an international flight in first class, they denied access to their Sky Club - very disappointing!

The plane was an older model, so it wasn’t as comfortable as others. The flight attendants were not helpful during onboarding. It was a full flight so there was chaos finding space for baggage.

Awesome! On time flight, early arrival, and a complimentary upgrade!

Prior to takeoff, the pilot told us there was a possibility of not being able to land and going to Portland. Well that happened, we took off and then did 8 loops around Spokane before the pilot told us we ran out of fuel and had to go to Portland. So for a 35 minute flight we have now been on the plane for 3 hours (boarded at 6:50 am and landed in Portland at 10:30). Then, we just sat in Portland's airport with no updates of when we can start heading back. All of a sudden, our pilots and crew just left, leaving us stranded in a different city and state. We continued to sit in Portland until we finally got a new crew assigned and boarded the plane (This was from 10:30-2). We then sat on the plane for an additional hour before take off because they had to count us multiple times. We finally landed in Spokane at 3:55 PM. So a flight that should have taken at max an hour took us 10 hours and we missed the majority of the recruiting event we went for.

Delta’s staff is unmatched. From the gate agents, to the pilots, to the flight attendants… all top of the industry.

Staff was great! Kind and cordial! Middle seat row 28 seat B has a hump in it. Trays were getting stuck when putting down and up. Good flight

This flight was no comparison to our prior flight. I'm thinking it all has to do with the age of the aircraft.

2 of the seats in row 31 the entertainment system was not working, and one seat the tray table did not go all the way down. Flight arrived early and departed on time which was great.

No charging outlets worked. Other than collecting trash attendants didn’t come around. No one could hear flight attendants announcements during the flight. Seat pads were horrible. Sitting on a board for 5 hours. What happened to Hawaiian airlines comfort, hospitality, and extras? Our pilots did an excellent job trying to minimize turbulence and incredible job in landing in windy conditions.

Yall need to integrate your system with Alaska more efficiently. They booted me off the first flight because of a discrepancy on your end.

Unfortunately, I was put into the middle seat in the first row of premium seating. Sounds nice right? No! that is the worst seat in the plane. I wish I was in economy rather than be in that seat! There is no seat back pocket, no tray table, no charger. Nothing! so unless you're row mates are willing to let you share their basic amenities any flyer should have, you are stuck. It was the worst experience ever! And the flight attendant forgot to take my drink order. I felt like the forgotten flyer.

Delayed and cancelled flights were hard and very stressful, both ways!

The flight was CANCELED!!! Can’t get much more “poor” than that. I had to switch to American Airlines, add another layover and got home in Honolulu 4 hours later than I was supposed to be home. One bright spot was Josh with Alaska Airlines at SFO. He got me on a United Flight that got me home a few hours before I would have. Without him I would have gotten home almost 7 hours after my originally scheduled flight.

Canceled my flight within 24 hours, causing me arriving home midnight. Will never book Hawaiian airlines anymore

I received several emails about my 3:10 flight. When I showed up to the airport at 12:30 to check my bags I was told the flight was actually at 1 pm. They grudgingly rebooked me for a flight at 5:22 to Vegas to get a connecting to LAX. I did find the gate for my original 3:10 flight but they were booked. I proceeded to receive status updates and gate change information for the 3:10 flight, even though I was apparently never supposed to be on that flight

The food options were limited and very specific. Some type of entertainment option for a 4.5 hour flight would have been nice.

The entire crew had everything handled and truly worked together. More than once, I saw them hustle down the aisle and back just to serve customers.

The flight was great. But the problem is we actually booked a flight with Hawaiian Airlines. We even received a Hawaiian Airlines confirmation number. So this made it really difficult to check in the online. So I had to call Hawaiian Airlines to get our Alaskan Airlines confirmation code to check in. Also weren’t told we were flying on Alaskan, but once we got on the plane, everything went well!

Seats are uncomfortable. This has been a trend in the industry for decades. Trying to fit more seats on each plane to increase profits at the expense of the passenger.

Staff were good. My seat was in need of repair, but for a short flight was not problematic. Usual basic snack and drink setup that you'll find on any US carrier. Over, a decent, basic flight.

Flight delayed for more than 16 hrs and no effort was spent to provide an alternate

it was a very short flight so my expectations were low.

Very disappointing given gate agent behavior. Filed a formal complaint with United.

Terrible. No customer service, no food, no drinks on a 6 hour premier economy booking.

The flight crew where really good. Better then the crew from BNE to SFO

left on time, reasonable boarding process arrived early luggage came out quickly

Pushed back only to get deplaned due to a tire damaged by ground crew. They did at least go pretty fast. The bathrooms should be banned under the Geneva convention. No room to even sit straight on the toilet. The under-seat entertainment units block what little leg room there is.

United airlines has the best customer experience from booking to arrival. I always fly United airlines. The mileage program is excellent

Remind customers of the need to have passport or new ID for boarding.

The flight never took off and we spent 7 hours at the airport

Frontier.. nickel and dime add-ons. Flight late, on time, late again, last minute gate change, arrival gate required a shuttle to the terminal. They sure keep you guessing.. if you like a little chaos and airport anxiety, this is the airline for you!

It was ok. It was expensive to check 2 bags ($75.00 per bag), and then it took a long time to wait for shuttle to take us from one terminal to the terminal where the plane was taking off at LAX. And all of this for a flight where we had to pay for any food or drink that was not water.

Horrible. I would never fly Frontier again. The booking process is tricky at best, but fraudulent in my opinion. Frontier customer service did nothing to rectify my purchase -- I ended up paying more than double what I could have gotten from other airlines and nearly triple what I thought I was buying from Frontier. Their booking practices are unfair to the consumer.

When I wanted to check in 3 hours prior to boarding time, the employees mentioned “a little over an hour delay” so I waited for an hour then I went to go look for food in the terminal and most people from that flight were in the same area looking for food. Finally I decided after food to check to see if it’s anytime closer and now it’s 2 mins until boarding closes?! What are you kidding me? I didn’t receive anything via sms about boarding now nor via email or on the intercom. I luckily made it through, barely, and then there’s no room for my carry on mind you I’m in the very first row so I had to place my purse in one further row back and my carry on sections down. Not sure who pays for better seats to get your stuff placed all over the plane but that was the worst experience I’ve ever had flying with anyone.

This airline sucks. They offer low rates then charge you for everything, the app does not work well, the seats are the most uncomfortable. Maintenance issues on the flight, and you still have to sit through their credit card commercials. People are nice enough but does not make up for overall poor experience.

I’m not gonna fly Frontier Airlines because booking is not an option. No water or food is for high price, not equipped for health emergency incompetent crew for emergency services. Cheap airline shows it is cheaper in all service categories. Boarding is the best of all airlines!

Cancelled flight after I arrived at airport after 75 min drive and parking. Next flight was 4 days in the future. Had to scramble and buy a much more expensive flight on another carrier.

I never got to experience the flight because they delayed my first flight and I missed this one. Then Frontier didn't want to help me rebook a flight to get me to my final destination.

Everything you need to know for your flight from San Francisco to Seattle

Other airlines flying from San Francisco to Seattle

Flights from the other most popular airlines that fly from San Francisco to Seattle according to KAYAK users. Prices are the lowest found on KAYAK over the last 7 days. Price and availability are not guaranteed.