SEA - SAN

C$ 128 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 18/5. 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, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Seattle to San Diego, as well as popular online travel agencies
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Everything you should know

Cheapest round-trip
C$ 229
Typical prices: C$ 506-C$ 246
Alaska Airlines
Tue 12/5Tue 19/5
SEA - SAN • Direct
Cheapest one-way flights
C$ 128
Typical prices: C$ 122-C$ 352
United Airlines
Mon 18/5
SEA - SAN • 1 stop
Advice from real travellers
AI-powered summary based on content written by travel experts. AI can make mistakes.
Delta's free Wi-Fi benefits SkyMiles members.
Alaska's 20-minute baggage guarantee ensures quick retrieval.
Expert advice
Expert advice
Expert advice
Expert advice
Top airlines
Cheapest • from C$ 229 (round-trip)
Best reviews • 8.0 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Direct 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 C$ 355 (round-trip)
Shortest trip • 4h 15m (one-way)
Insights
Insights
Insights
Insights
When to book
in advance
Our data shows that travellers 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
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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

Tue, 12 May - Tue, 19 May
Alaska Airlines Logo
7:40 p.m. - 10:36 p.m.
SEA
-
SAN
2h 56mdirect
Alaska Airlines Logo
7:15 a.m. - 10:25 a.m.
SAN
-
SEA
3h 10mdirect
C$ 229Alaska Airlines
Wed, 6 May - Sat, 9 May
United Airlines Logo
12:34 p.m. - 5:24 p.m.
SEA
-
SAN
4h 50m
1 stop
United Airlines Logo
1:35 p.m. - 9:06 p.m.
SAN
-
SEA
7h 31m
1 stop
C$ 231United Airlines
Wed, 6 May - Wed, 13 May
Southwest Logo
5:30 a.m. - 10:50 a.m.
SEA
-
SAN
5h 20m
1 stop
Southwest Logo
3:00 p.m. - 6:00 p.m.
SAN
-
SEA
3h 00mdirect
C$ 243Southwest
Wed, 29 Apr - Tue, 5 May
United Airlines Logo
7:12 a.m. - 11:55 a.m.
SEA
-
SAN
4h 43m
1 stop
United Airlines Logo
1:35 p.m. - 9:06 p.m.
SAN
-
SEA
7h 31m
1 stop
C$ 246United Airlines
Tue, 12 May - Sat, 16 May
United Airlines Logo
7:08 a.m. - 11:54 a.m.
SEA
-
SAN
4h 46m
1 stop
United Airlines Logo
1:35 p.m. - 9:06 p.m.
SAN
-
SEA
7h 31m
1 stop
C$ 248United Airlines
Wed, 29 Apr - Tue, 5 May
United Airlines Logo
6:00 a.m. - 10:20 a.m.
SEA
-
SAN
4h 20m
1 stop
United Airlines Logo
1:35 p.m. - 9:06 p.m.
SAN
-
SEA
7h 31m
1 stop
C$ 250United Airlines
Sat, 9 May - Tue, 12 May
Alaska Airlines Logo
4:42 p.m. - 7:39 p.m.
SEA
-
SAN
2h 57mdirect
Alaska Airlines Logo
7:35 p.m. - 10:53 p.m.
SAN
-
SEA
3h 18mdirect
C$ 252Alaska Airlines
Sat, 9 May - Tue, 12 May
Alaska Airlines Logo
2:41 p.m. - 5:38 p.m.
SEA
-
SAN
2h 57mdirect
Alaska Airlines Logo
6:34 p.m. - 9:45 p.m.
SAN
-
SEA
3h 11mdirect
C$ 253Alaska Airlines
Mon, 4 May - Mon, 11 May
United Airlines Logo
7:36 p.m. - 12:28 a.m.
SEA
-
SAN
4h 52m
1 stop
United Airlines Logo
6:26 p.m. - 1:12 a.m.
SAN
-
SEA
6h 46m
1 stop
C$ 255United Airlines
Wed, 24 Jun - Tue, 30 Jun
Delta Logo
3:25 p.m. - 6:13 p.m.
SEA
-
SAN
2h 48mdirect
Delta Logo
7:10 p.m. - 10:20 p.m.
SAN
-
SEA
3h 10mdirect
C$ 257Delta
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 May.

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 C$ 267 (return) on average. On the other hand, the most expensive months are December and July, where the average cost of round-trip tickets is C$ 428 and C$ 427 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 C$ 358 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
Harriet Baskas

Harriet Baskas

Expert on Alaska Airlines

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 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.

Good to know

Low seasonJanuary
Cheapest flightC$ 128
Best time to beat the crowds (29% less expensive on average)
Most popular time to fly (11% more expensive on average)
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 are some good hotels near San Diego International Airport?

    The Hilton is a stylish hotel that is less than a 15-minute drive from Balboa Park and a 16-minute drive from San Diego International Airport. The Sheraton San Diego Hotel is a modern option that is a 15-minute drive from the USS Midway Museum and a 14-minute drive from the airport.

  • Is there anywhere to smoke at San Diego International Airport?

    At this time, there are no indoor smoking rooms in the terminals of San Diego International Airport. However, there are some designated outdoor smoking zones that are placed outside of the doors of the Arrivals terminal and which are clearly marked by official airport signs.

  • What is there to do at Seattle-Tacoma International Airport?

    If you are an art enthusiast, make sure to check out the contemporary collection from SeaTac that can be found in the main terminal of Seattle-Tacoma International Airport. If you would prefer to watch a movie or TV show, head to a Digiboo self-service kiosk to rent some digital content before boarding your flight.

  • What shopping options are there at Seattle-Tacoma International Airport?

    To purchase some gifts or souvenirs, browse through the various shops that are located in Seattle-Tacoma International Airport. Chalo Seattle is a local boutique that offers a variety of regional products, while Affordable Luxuries sells clothing and accessories. There are also several Hudson News locations, in case you need to pick up any last-minute travel essentials.

  • 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 C$ 128 for a one-way ticket and C$ 229 for a round-trip.

  • 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?

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

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

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

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

    The two airlines most popular with KAYAK users for flights from Seattle to San Diego are Southwest and Alaska Airlines. With an average price for the route of C$ 391 and an overall rating of 8.0, Southwest is the most popular choice. Alaska Airlines is also a great choice for the route, with an average price of C$ 401 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.

  • 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 C$ 144 or less one-way and C$ 210 or less round-trip.
  • An easy way to make your day of traveling as quick and simple as possible is to specifically search for direct flights from Seattle to San Diego. Companies such as Delta, Alaska, and United Airlines offer many daily flights between these two locations, as well as additional perks like in-flight entertainment and free snacks.
  • If you find traveling to be stressful, consider getting a massage to help you relax before your flight from Seattle to San Diego starts boarding. The Massage Bar is located near the N Gates of Seattle-Tacoma International Airport and offers a variety of different services, making it a convenient place to go in order to be pampered.
  • For those interested in freshening up after landing at San Diego International Airport, purchase an access pass for the Airspace Lounge. In addition to providing guests with private showers, towels, and toiletries, this lounge also has unlimited drinks and snacks, high-speed WiFi, and several televisions.
  • Seattle-Tacoma International Airport is home to Experience the City of Music, a program that coordinates daily live music performances throughout the airport’s Departures terminals between the hours of 9 am and 3 pm. Make sure to check the program’s event calendar to see if you will have the opportunity to catch a show before boarding your flight.
  • To refuel after a day of traveling, grab a bite to eat from one of the several restaurants in San Diego International Airport. The Bankers Hill Bar & Restaurant is an American-style choice that is located in Terminal 1, while the PGA TOUR Grill serves healthy entrees and is found in Terminal 2.

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 nonstop 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 nonstop flights

Reviews of the top 4 airlines flying 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 4337 reviews
8.0Comfort
7.0Food
8.6Crew
7.5Entertainment
8.1Boarding
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

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!).

Could not get my connecting flight boarding pass until four hrs before departure! Ver annoying especially since the staff could not explain why!

Left a few minutes early. Got in 15 minutes early. Very attentive service on board. Very organized boarding.

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!

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

Information on your arrival and departure airports