SEA - SAN

$88 Find Cheap Flights from Seattle to San Diego

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Seattle to San Diego departing on 5/1. 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 San Diego

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

Cheapest round-trip
$141
Typical prices: $401-$197
Frontier
Mi 4/29Mi 5/6
SEA - SAN • 1 stop
Cheapest non-stop
$164
Typical prices: $404-$192
Alaska Airlines
Di 4/28Mi 5/6
SEA - SAN • 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 for comfort.
Use SEA Spot Saver for faster security at Seattle.
Expert advice
Expert advice
Expert advice
Expert advice
Top airlines
Cheapest • from $141 (round-trip)
Best reviews • 8.0 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Nonstop flights
You can fly direct with Alaska Airlines, Delta and Southwest. Average duration is 2h 52m
Direct flights
Direct flights
+1
+1
Direct flights
Direct flights
+1
Avoid delays
Most punctual • 87% on-time
Best time • Fewest delays
Insights
Insights
Insights
Insights
Top layover airports
Cheapest • Avg $192 (round-trip)
Shortest trip • 4h 38m (one-way)
Insights
Insights
Insights
Insights
When to book
in advance
Our data shows that travelers who book at least 4 weeks in advance save around 59% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
Cheapest • 28% price drop
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Start a new search
KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to San Diego!
Flight Deals
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Expert advice
Flight Deals

Cheap Flights from Seattle to San Diego (SEA-SAN)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Seattle to San Diego 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 Seattle to San Diego

Mi, Apr 29 - Mi, Mai 6
Frontier Logo
7:12 pm - 8:34 am
SEA
-
SAN
13h 22m
1 stop
Frontier Logo
7:34 pm - 10:22 am
SAN
-
SEA
14h 48m
1 stop
$141Frontier
Mi, Apr 29 - Di, Mai 5
Frontier Logo
7:12 pm - 8:34 am
SEA
-
SAN
13h 22m
1 stop
Frontier Logo
6:25 am - 9:49 am
SAN
-
SEA
27h 24m
1 stop
$158Frontier
Mi, Mai 6 - Mi, Mai 13
Frontier Logo
7:50 pm - 8:42 am
SEA
-
SAN
12h 52m
1 stop
Frontier Logo
9:59 pm - 10:22 am
SAN
-
SEA
12h 23m
1 stop
$159Frontier
Mi, Mai 13 - Sa, Mai 16
Frontier Logo
7:50 pm - 8:42 am
SEA
-
SAN
12h 52m
1 stop
Frontier Logo
9:59 pm - 10:22 am
SAN
-
SEA
12h 23m
1 stop
$160Frontier
Mo, Mai 11 - Mi, Mai 13
Frontier Logo
11:37 am - 9:04 pm
SEA
-
SAN
9h 27m
1 stop
Frontier Logo
9:59 pm - 10:22 am
SAN
-
SEA
12h 23m
1 stop
$161Frontier
Mi, Mai 20 - Mi, Mai 27
Alaska Airlines Logo
3:02 pm - 5:53 pm
SEA
-
SAN
2h 51mnonstop
Alaska Airlines Logo
8:04 pm - 11:18 pm
SAN
-
SEA
3h 14mnonstop
$162Alaska Airlines
Di, Apr 28 - Mi, Mai 6
Alaska Airlines Logo
9:07 am - 12:04 pm
SEA
-
SAN
2h 57mnonstop
Alaska Airlines Logo
7:35 pm - 10:53 pm
SAN
-
SEA
3h 18mnonstop
$164Alaska Airlines
Di, Mai 12 - Di, Mai 19
Alaska Airlines Logo
4:42 pm - 7:39 pm
SEA
-
SAN
2h 57mnonstop
Alaska Airlines Logo
7:15 am - 10:25 am
SAN
-
SEA
3h 10mnonstop
$165Alaska Airlines
Mi, Mai 6 - Sa, Mai 9
United Airlines Logo
12:34 pm - 5:24 pm
SEA
-
SAN
4h 50m
1 stop
United Airlines Logo
1:35 pm - 9:06 pm
SAN
-
SEA
7h 31m
1 stop
$166United Airlines
Mo, Mai 4 - Mi, Mai 13
Frontier Logo
4:20 pm - 11:59 pm
SEA
-
SAN
7h 39m
1 stop
Frontier Logo
9:59 pm - 10:22 am
SAN
-
SEA
12h 23m
1 stop
$169Frontier
Booking Insights

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

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

How much is a round-trip flight from Seattle to San Diego?

This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from Seattle to San Diego departing in April.

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

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

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

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Seattle to San Diego, 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 Seattle to San Diego is January, where tickets cost $192 (return) on average. On the other hand, the most expensive months are December and July, where the average cost of round-trip tickets is $308 and $307 respectively.

Can I save money by flying with a layover from Seattle to San Diego?

The average round-trip price for all non-stop flights, flights with one layover, and flights with two layovers for the route found by users searching on KAYAK in the last 2 weeks.

Yes, flying with a layover may cost you more time, but you can also save money on the route, with a 1 stop layover the cheapest option at $304 on average.

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

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Seattle to San Diego, 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 Seattle to San Diego, you should book around 4 weeks before departure, which saves you about 59% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 8 weeks before departure.

Expert advice

Expert advice for your flight from Seattle to San Diego

 
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
Stefanie Waldek

Stefanie Waldek

Expert on 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.

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.

Brandon Schultz

Brandon Schultz

Expert on SAN

Brandon Schultz is an award-winning food and travel writer based in New York City. His work has appeared in Forbes, AAA, Thrillist, Travel + Leisure, and The Daily Meal, among many others, and he is the author of 6 books, including 3 cookbooks.

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

When planning a flight from Seattle to San Diego, there are several ways to potentially save money. Generally, Tuesdays are the cheapest day of the week to fly, while September and October are the cheapest months.

Booking Advance: Book your flight at least 21 days in advance for the best rates.

Airline Choice: Consider flying with Spirit Airlines or Frontier, as they generally offer the cheapest fares.

Direct vs Layover: Direct flights are significantly cheaper than those with a layover.

Route Selection: The route from Seattle/Tacoma Intl (SEA) to San Diego (SAN) is typically the cheapest.

Flight Type: Direct flights are typically more expensive, consider flights with layovers to save money.

AI-powered; AI can make mistakes.

Good to know

Low seasonJanuary
Cheapest flight$88
Best time to beat the crowds with an average 29% drop in price.
Most popular time to fly with an average 11% increase in price.
Flight from Seattle to San Diego

When to book flights from Seattle to San Diego

Are your dates flexible? Find out the best times to travel from Seattle to San Diego 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 Seattle to San Diego

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

    In the last 3 days, the lowest price for a flight from Seattle to San Diego was $88 for a one-way ticket and $141 for a round-trip.

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

    Even though you are not required to have a passport, keep in mind that an official ID is needed to board the airplane.

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

    When flying out of Seattle you will be using Seattle/Tacoma Intl. You will be landing at San Diego, also known as San Diego.

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

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

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

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

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

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

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

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

  • Which is the best airline for flights from Seattle to San Diego, Southwest or Delta?

    The two airlines most popular with KAYAK users for flights from Seattle to San Diego are Southwest and Delta. With an average price for the route of $273 and an overall rating of 8.0, Southwest is the most popular choice. Delta is also a great choice for the route, with an average price of $261 and an overall rating of 7.9.

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

    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 Seattle to San Diego.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to San Diego from Seattle 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 Seattle to San Diego?

    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 San Diego with an airline and back to Seattle with another airline. Booking your flights between Seattle and SAN 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 Seattle to San Diego?

    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 San Diego from Seattle 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 Seattle to San Diego

  • Looking for a cheap flight? 25% of our users found flights on this route for $179 or less one-way and $231 or less round-trip.

Prefer to fly direct from Seattle to San Diego?

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

Direct departures

Seattle/Tacoma Intl to San Diego

Monday

Alaska Airlines,Delta,Southwest

Alaska Airlines,Delta, +1 more

Tuesday

Alaska Airlines,Delta,Southwest

Alaska Airlines,Delta, +1 more

Wednesday

Alaska Airlines,Delta,Southwest

Alaska Airlines,Delta, +1 more

Thursday

Alaska Airlines,Delta,Southwest

Alaska Airlines,Delta, +1 more

Friday

Alaska Airlines,Delta,Southwest

Alaska Airlines,Delta, +1 more

Saturday

Alaska Airlines,Delta,Southwest

Alaska Airlines,Delta, +1 more

Sunday

Alaska Airlines,Delta,Southwest

Alaska Airlines,Delta, +1 more

See more direct flights

Direct returns

San Diego to Seattle/Tacoma Intl

Monday

Alaska Airlines,Delta,Southwest

Alaska Airlines,Delta, +1 more

Tuesday

Alaska Airlines,Delta,Southwest

Alaska Airlines,Delta, +1 more

Wednesday

Alaska Airlines,Delta,Southwest

Alaska Airlines,Delta, +1 more

Thursday

Alaska Airlines,Delta,Southwest

Alaska Airlines,Delta, +1 more

Friday

Alaska Airlines,Delta,Southwest

Alaska Airlines,Delta, +1 more

Saturday

Alaska Airlines,Delta,Southwest

Alaska Airlines,Delta, +1 more

Sunday

Alaska Airlines,Delta,Southwest

Alaska Airlines,Delta, +1 more

See more direct flights

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

 
See real verified KAYAK customer reviews for airlines flying from Seattle to San Diego. 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 Seattle to San Diego? 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.
8.0
SouthwestOverall score based on 4335 reviews
7.5Entertainment
8.6Crew
8.1Boarding
8.0Comfort
7.0Food
Airline reviews

The Air hostess were very rude on my flight from Houston to Austin . Their regular communication itself felt a they are shouting at people.

4.0 Okaysangeetha, Apr 2026
AUS - SJC
Read more Southwest reviews

The Air hostess were very rude on my flight from Houston to Austin . Their regular communication itself felt a they are shouting at people.

Boarding was easy. The seats are small and fairly uncomfortable

The problem with the seat assignments is that there were a lot of rows in the front that were empty but my row at the back was full. Just not so pleasant.

No food or entertainment, just a quick 40 minute flight. A little bumpy due to Santa Ana winds but pilot has no control over that. Good flight and landing!

Good but I prefer choose your own seat. With the new assigned seats they should board from the back I see no advantage to this new boarding. Just like every other airline

Mediocre. Boarding is now unpleasant. The employees, once friendly and nice, are now regularly speaking sternly to passengers, badgering them to do things right so they can take off on time and gate check bags because they don't have enough overhead bin space. The pretzel snack was crushed flat and broken into even smaller pieces, which happens frequently lately. Drink service was suspended before they reached my row.

The charges were ridiculous for an hour flight and the turbulence was very scary.

3 hour delay. Had to change plans and was still delayed.

The flight crew was extremely rude and especially not helpful when our flight was delayed.

The boarding and seat assignment system no longer works for me, but I know it is being replaced. Otherwise, I am good with the overall experience.

Alaska Airlines staff go out of their way to accommodate my fragile musical instrument, every time. They are unlike any other airline. I've experienced this can-do attitude on several flights with different staff, so this must be the culture of their company. I appreciate Alaska!

It was a bumpy flight but the crew was very attentive and made it a safe and enjoyable experience.

i canceled my flight from SEA to SFO, SNA to SEA and received full refund from Alaska Airlines. i am pleased with the customer service.

Departing flight for our weekend trip was cancelled due to weather which meant our return flight was useless. The whole thing was difficult to get support through but Alaska did recover and was able to reimburse us for the flights yesterday. For some reason, Kayak was not kept in the loop, adding to the confusion.

i canceled my return flight package with Alaska Airlines. Customer Service was excellent and assisted me to cancelled both of our reservations and returned the payment in full. that is excellent service and understanding and empathy of the customers' needs. i like Alaska Airlines and recommend AS to everyone.

The flight attendant was friendly and attentive. Although our interaction was brief—- it made a difference. The crew was upfront about turbulence. I like the Maui pretzels.

I paid for the WiFi and it didn’t work during the whole flight

Great experience, staff and crew were very professional, friendly and helpful!

The ticket I purchased through Kayak did not show up in my Alaska Airlines app, and neither of the codes given to me worked for online check in. I've never had to show up to the airport at 6am wondering if I've been scammed. Cheap flight fare or whatever does not play well with airlines and I will be wary of using Kayak in the future.

The plane was delayed which was annoying. No seat back screens is a bummer. Staff if great

WiFi didn’t work most of the time. The usb chargers would work only occasionally for 5 mins and wouldn’t charge after that. Had to keep trying repeatedly at each of the seats in the row.

The crew bent over backwards to thank us for flying and make us comfortable. The food service was quick and efficient. The Captain communicated and said goodbye and thank you as we departed. They really stood out!

Generally on time departures and arrivals, clean planes, sky miles membership provides great benefits (complimentary upgrades, etc).

my mom urmila patel needed a wheelchair which was not available on the curbside. she needed to walk almost 50 meters inside (at the risk of falling) and then had to wait in line to get a wheelchair (this is not ok). Once obtained she had to seat in it for 30-45 minutes for someone to take her in thru the checkin process (which was fairly smooth and easy). the lady who helped her with her checkin process was very courteous and helpful

Staff at the check-in counter were friendly, happy and helpful. They tagged our bags and sent us to “bag drop off” but were not very clear about where that was. The airport was busy we headed off in what we thought was the right direction until a gentleman waved us down and actually came after us. He was the baggage handler for Delta and recognized our “deer in the headlights “ look-he brought us to the right area (which was marked as the Southwest Airlines Drop Off) and sent us on our way. Wonderful guy, low key and working with a big smile on his face. Loved it. Loved him.

Arlene was a great flight attendant. I also liked how one of the other flight attendants gave us a heads up about snacks and asked everyone to remove their headphones when it was their turn to order. Good idea.

I haven’t flown economy in over 20 years but it was not bad. Room by my feet for my bag and seat was roomy enough. Surprised in a good way.

Snacks and included beverages were appreciated. Boarding went smoothly. Plenty of overhead bin space. Seats get very uncomfortable after a couple of hours. After waiting 10 painful minutes for my walker, a very nice Delta guest agent pushed me in a wheelchair to the gate. It was finally delivered to me after another 15 minutes . Our checked bag was on the carousel long b4 I was able to retrieve it. Fortunately it was still there but somewhere along the way the straps we used to secure it were removed and and were not reattached. Wish I had made note of the agents name.

The cabin temperature was nice and cool. The wifi was not working.

As previously noted, this flight was great: departure was timely, the crew was friendly and attentive, and wifi connectivity was seamless. In particular, I appreciated that the flight attendant just told me to stow the laptop right before takeoff/landing, and trusted me to do so (which I did!).

The checking was disaster, the crew wasn't behave well. It took us two hours to check in, after that thr line at the TSA was long, we barely make the flight. Bad airline

There was no wifi available at any price -- the plane did not have wifi equipment. Movie choices were blah - hits from the past; nothing recent. The food was blah airplane food. They should have had Mai Tai drinks available as per the Hawaiian Airlines magazine, but they had none onboard.

I like that if they asked you to checked in a bag at the gate they give you priority to board

The crew at Hawaiian Airlines was fantastic. Kind and hard working. The pilots were great with giving us all the updates to make sure we were informed.

I liked the Starlink WiFi but didn't like how they said they were the only airline to offer a free meal and it turns out to be just a standalone sandwich and then charge for snacks to go with it. Rather have the free snacks like Southwest, but have the option to purchase a decent meal for a 5+ hour flight.

Flight scheduled to take off at 5.55pm but it did not take off until 7pm due to some food delivery delay.

The crew was quite good, they came by often with drinks or to collect trash. But what wasn't nice was the flight was over weigh and several people had to be rebooked. I was questioned whether I should have a seat when I was getting to it. The in-flight entertainment kept buffering and interrupting. And the route took the airplane through high winds which caused us a longer flight

Wasn’t on the flight due to Alaska cancellation…also after all the rerouting, I was going to be on a later flight that left SFO at 7:47pm, which meant an almost 6 hour layover. That same Hawaiian flight was delayed for another 2hours.

I like Hawaiian, it was great that they had good internet connection across the Pacific Ocean, thanks to Star Link satellites. The seating was comfortable, ( I was in economy ). Maybe I missed it, but I only got offered a beverage once. It was a nonstop flight KOA to SMF. I would take it again next time I go that way.

Previously flown Hawaiian Airlines on similar routes, I found Alaska Airlines to be noticeably more comfortable. The seats on Alaska Airlines provided better support and cushioning, which made a significant difference on the long flight to the islands. When you’re spending 5-6 hours in the air, seat comfort really matters, and Alaska Airlines delivered where it counts. After comparing both carriers, I’ve decided to book with Alaska Airlines for all my future Hawaii trips. The superior seat comfort alone makes it worth choosing Alaska over Hawaiian Airlines. If you’re planning a trip to Hawaii and prioritizing comfort, I’d recommend giving Alaska Airlines a try. You won’t be disappointed. Highly recommended for Hawaii travel!

They switched our terminal 3 times and we were delayed for four plus hours!!!

It was an early flight and most people napped/slept and the crew let us which was nice.

The crew acted like they had never done this and kept barking passive aggressive orders at people. + the security line + the delay + sitting on the tarmac for 2 hours + none of the apps or signage updating with correct times

Our flight was canceled. I will never use Kayak nor Frontier for travel again. The entire experience was a headache.

Terrible. The canceled my entire flight when I requested a refund for a trip frontier canceled trip one way.

I knew going into this that Frontier, being a low cost carrier, would be pretty bare bones and charge for most extras but this was made up for by the fact that the airplane was a reasonably new Airbus, every employee was great and best of all, Everett Washington is an amazing airport - thanks Frontier for flying there!!!

i was unable to check in the flight. refund requested

I think Frontier was very good at communication. Their app worked very well. Loading was great and the flight was nice and easy.

Seats were new and comfortable. Staff was fine. Missed my connection due to weather -which wasn’t their fault- but got no help at all. Gate staff sent me to customer service, which was and stayed unstaffed. Sign with QR code directed me to call or chat. Chat was useless. Call was returned after an hour. No itinerary offered by Frontier could get me home in less than 30 hours. Rebooked with another airline and got a partial refund that came to about 10 percent of what I paid to get home.

Great for the price. No wifi or entertainment, but gate agents and crew were fantastic and we boarded quickly and left on time.

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

Other airlines flying from Seattle to San Diego

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