Seattle

$80+ Cheap flights from San Diego to Seattle (SAN - SEA)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 4/27. Fares are subject to change and may not be available on all flights or dates of travel.
SAN — SEA
Mar 17 — Mar 241
We work with more than 300 partners to bring you better travel deals

Find cheap flights from San Diego to Seattle with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.
Cheapflights Tip: The best prices from San Diego to Seattle/Tacoma Intl are usually found in January or October, booked 84 days in advance, depart on a Thursday or Friday and return on a Wednesday

Cheap flight deals from San Diego to Seattle

Cheapest flights from San Diego to Seattle
Explore the most affordable flight options available from San Diego to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on February 15, 2026.

This Kiwi.com deal was found by Cheapflights users on 2/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/2210:00 am
SAN
-
SEA
1 stop23h 27m
Frontier
Sat 4/256:57 pm
SEA
-
SAN
1 stop13h 37m
Frontier
Deal found 2/15$120
This Kiwi.com deal was found by Cheapflights users on 2/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/276:25 am
SAN
-
SEA
1 stop27h 02m
Frontier
Sat 5/96:57 pm
SEA
-
SAN
1 stop29h 04m
Frontier
Deal found 2/13$123
This Southwest deal was found by Cheapflights users on 2/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 3/712:00 pm
SAN
-
SEA
1 stop7h 15m
Southwest
Sun 3/82:35 pm
SEA
-
SAN
Nonstop2h 40m
Southwest
Deal found 2/14$127
This Kiwi.com deal was found by Cheapflights users on 2/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/246:25 am
SAN
-
SEA
1 stop8h 40m
Frontier
Sun 4/266:57 pm
SEA
-
SAN
1 stop13h 37m
Frontier
Deal found 2/12$128
This Southwest deal was found by Cheapflights users on 2/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 3/711:05 am
SAN
-
SEA
Nonstop3h 05m
Southwest
Wed 3/119:00 am
SEA
-
SAN
2 stops8h 40m
Southwest
Deal found 2/15$132
This Southwest deal was found by Cheapflights users on 2/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/53:00 pm
SAN
-
SEA
Nonstop3h 00m
Southwest
Sun 5/1710:15 pm
SEA
-
SAN
1 stop9h 20m
Southwest
Deal found 2/14$133
This Kiwi.com deal was found by Cheapflights users on 2/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/2811:42 am
SAN
-
SEA
1 stop21h 45m
Frontier
Wed 5/610:42 am
SEA
-
SAN
2 stops12h 24m
Frontier
Deal found 2/13$134
This Kiwi.com deal was found by Cheapflights users on 2/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/112:00 pm
SAN
-
SEA
1 stop23h 37m
Frontier
Sun 4/510:25 pm
SEA
-
SAN
1 stop8h 56m
Frontier
Deal found 2/12$135
This Southwest deal was found by Cheapflights users on 2/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 3/137:30 pm
SAN
-
SEA
1 stop6h 10m
Southwest
Mon 3/166:45 am
SEA
-
SAN
1 stop7h 10m
Southwest
Deal found 2/13$137
This Kiwi.com deal was found by Cheapflights users on 2/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/139:28 pm
SAN
-
SEA
1 stop11h 59m
Frontier
Thu 4/164:20 pm
SEA
-
SAN
1 stop7h 41m
Frontier
Deal found 2/14$138
This Kiwi.com deal was found by Cheapflights users on 2/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/173:16 pm
SAN
-
SEA
2 stops49h 53m
Frontier
Thu 3/2612:24 pm
SEA
-
SAN
1 stop8h 09m
Frontier
Deal found 2/14$139

Find flight deals from San Diego to Seattle

Discover tips and strategies to find the most affordable flight options for your journey from San Diego (SAN) to Seattle (SEA). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated February 15, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$123
(Kiwi.com)

One-way from

$80
(Kiwi.com)

Popular in

July

Cheapest in

January

Average price

$217

Good round-trip deal

$229 or less

Good one-way deal

$155 or less
Provider with most accurate pricing for San Diego-Seattle/Tacoma Intl flight deals.
Provider most trusted by Cheapflights users for San Diego-Seattle/Tacoma Intl flights.
From San Diego to Seattle/Tacoma Intl
One-way flight from San Diego to Seattle/Tacoma Intl
Highest demand for flights based on searches. 9% potential increase in price ($26 potential increase over avg. RT price).
Cheapest flight prices on average. 1% potential price decrease ($4 potential savings vs. average RT price).
Average for round-trip flights in February 2026
Price to beat on a round-trip flight from San Diego to Seattle/Tacoma Intl.
Price to beat on a one-way flight from San Diego to Seattle/Tacoma Intl.

Cheapflights Fare Finder

 
Customize your flight search to find flights from San Diego to Seattle that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated February 15, 2026.
Use the filters below to find and compare flights from San Diego to Seattle that are best for you.

Fly from

San Diego

Fly to

Seattle

Route

Depart

Return

Price

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Sat 4/25

2:55 pm-5:55 pm

Nonstop3h 00m

Seattle/Tacoma Intl

Mon 4/27

5:00 am-9:00 am

1 stop4h 00m

$127

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Tue 5/5

6:25 am-1:25 pm

2 stops7h 00m

Seattle/Tacoma Intl

Fri 5/8

11:05 am-1:50 pm

Nonstop2h 45m

$132

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Sat 3/7

3:15 pm-10:55 pm

2 stops7h 40m

Seattle/Tacoma Intl

Sun 3/8

2:35 pm-5:15 pm

Nonstop2h 40m

$132

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Fri 3/6

8:26 pm-11:40 pm

Nonstop3h 14m

Seattle/Tacoma Intl

Fri 3/20

9:10 pm-11:58 pm

Nonstop2h 48m

$137

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Sat 3/7

7:50 pm-1:25 am

1 stop5h 35m

Seattle/Tacoma Intl

Tue 3/10

11:00 am-6:40 pm

1 stop7h 40m

$137

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Fri 3/13

7:30 pm-1:40 am

1 stop6h 10m

Seattle/Tacoma Intl

Mon 3/16

6:45 am-1:55 pm

1 stop7h 10m

$137

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Wed 4/1

1:50 pm-7:35 pm

1 stop5h 45m

Seattle/Tacoma Intl

Wed 4/8

9:20 am-5:45 pm

2 stops8h 25m

$142

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Fri 3/13

7:30 pm-1:40 am

1 stop6h 10m

Seattle/Tacoma Intl

Tue 3/17

9:00 am-5:40 pm

2 stops8h 40m

$142

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Thu 4/9

6:15 am-9:27 am

Nonstop3h 12m

Seattle/Tacoma Intl

Thu 4/16

9:11 pm-11:59 pm

Nonstop2h 48m

$167

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Wed 3/11

10:45 am-1:50 pm

Nonstop3h 05m

Seattle/Tacoma Intl

Wed 3/18

9:25 am-3:50 pm

1 stop6h 25m

$175

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/11

Showing 1-10 of 19 results
1
2

Compare providers for flights from San Diego to Seattle

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from San Diego to Seattle in February.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
CheapfaremartPrice Accuracy-Trust Score*1 star
CheapflightsfaresPrice Accuracy2 starsTrust Score*2 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
CheapOairPrice Accuracy3 starsTrust Score*3 stars
CheapTicketsDealPrice Accuracy3 starsTrust Score*3 stars
Kiwi.comPrice Accuracy3 starsTrust Score*3 stars
JustAirTicketPrice Accuracy-Trust Score*1 star
GotogatePrice Accuracy2 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on San Diego-Seattle flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on San Diego-Seattle flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from San Diego-Seattle flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on San Diego-Seattle flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for San Diego-Seattle flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from San Diego to Seattle

Have a flexible travel schedule? Discover the best time to fly to Seattle from San Diego with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

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

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

Use this chart to determine the optimal time to book a round-trip flight from San Diego to Seattle. Price data was last updated on February 13, 2026.

The price you pay for your flight from San Diego to Seattle may vary depending on when you book. For the best chance of a lower fare, look to book 84 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

What is the cheapest month to book a flight from San Diego to Seattle?

Currently, February is the cheapest month in which you can book a flight from San Diego to Seattle (average of $60). Flying from San Diego to Seattle in July is currently the most expensive (average of $138). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from SAN to SEA?

Find hourly flight availability from San Diego to Seattle. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated February 15, 2026.

It’s typically best to fly out from San Diego to Seattle in the evening. Doing so could potentially save you 17% on the flight price compared to flying in the morning, which is usually more expensive.

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

Use this chart to determine the cheapest time to fly round-trip from San Diego to Seattle. Price data was last updated on February 7, 2026.

Travelers seeking maximum savings on their San Diego to Seattle flight should consider departing on Thursday evenings when fares are most often at their lowest. Monday evenings flights should be avoided if possible as fares are typically the most expensive at this time.

The best insider tips for San Diego to Seattle flights

AI-powered summary based on content written by travel experts. AI can make mistakes.
Cheapflights partnered with top experts to bring you the best recommendations for your San Diego to Seattle trip
Our travel experts
Blane Bachelor

Blane Bachelor

Expert on SAN

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.

Brandon Schultz

Brandon Schultz

Expert on SEA

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.

Reviews of airlines servicing Seattle

Get insights into the airlines that provide service to Seattle. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Seattle. Reviews last updated February 15, 2026.
Get a feel of what it's like to fly with Alaska Airlines, Southwest, and Delta from San Diego to Seattle by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.

Crew

8.5

Food

7.1

Boarding

8.1

Comfort

7.8

Overall

8.0

Entertainment

7.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Dec 2025

SJC - SEA

The flight was great. Don’t have to make it better. Everything was OK.

Crew

8.5

Food

7.1

Boarding

8.1

Comfort

7.8

Overall

8.0

Entertainment

7.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Dec 2025

SJC - SEA

The flight was great. Don’t have to make it better. Everything was OK.

Crew

8.5

Food

7.1

Boarding

8.1

Comfort

7.8

Overall

8.0

Entertainment

7.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Dec 2025

SJC - SEA

The flight was great. Don’t have to make it better. Everything was OK.

Crew

8.5

Food

7.1

Boarding

8.1

Comfort

7.8

Overall

8.0

Entertainment

7.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Dec 2025

SJC - SEA

The flight was great. Don’t have to make it better. Everything was OK.

Crew

8.5

Food

7.1

Boarding

8.1

Comfort

7.8

Overall

8.0

Entertainment

7.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Dec 2025

SJC - SEA

The flight was great. Don’t have to make it better. Everything was OK.

Crew

8.5

Food

7.1

Boarding

8.1

Comfort

7.8

Overall

8.0

Entertainment

7.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Dec 2025

SJC - SEA

The flight was great. Don’t have to make it better. Everything was OK.

Related info for your journey

Find useful and relevant information for your journey from San Diego to Seattle. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
  • What airports do I use to fly from San Diego to Seattle?

    If you book a flight from San Diego to Seattle, you will be flying from San Diego to Seattle/Tacoma Intl. Flights to Seattle/Tacoma Intl (SEA) from San Diego (SAN) take 3h 00m for a nonstop flight. There are 30 flights from San Diego to Seattle per day from 7 airlines.

  • How popular is this San Diego to Seattle flight route?

  • How long is the flight from San Diego to Seattle?

    A quick flight from San Diego to Seattle can take about 3h. Southwest provides one of the quickest options available for as low as $127. Airlines will cover a distance of 1051 mi. Most flights are nonstop.

  • What are the cheapest airlines flying from San Diego to Seattle round-trip?

    Flying on Spirit Airlines is currently your cheapest option to Seattle, with prices starting at $79. Additional round-trip tickets that might be worth considering are offered by Frontier and Delta, with the lowest prices starting at $103 and $119, respectively. Spirit Airlines is priced at 68% lower than the current average price of a flight leaving 3 months from now.

  • What are the cheapest airlines to fly from San Diego to Seattle one-way?

    For one-way options, check prices for Spirit Airlines. According to our data, you can fly for as low as $52. Users have also found prices from $75 and $78 on Frontier and Southwest, respectively.

  • What are the most reliable airlines from San Diego to Seattle?

    Consider Air France (91%), American Airlines (89%) or Virgin Atlantic (86%) when booking your flight. These represent the most reliable airlines when flying from San Diego to Seattle.

  • What are the cheapest flights from San Diego to Seattle?

    While on average a flight from San Diego to Seattle is generally $1,048, our data shows the cheapest flight currently is $79. When looking at the most popular route, (San Diego - Seattle/Tacoma Intl), you can expect to pay $117 for that flight.

  • Can I find deals for flights from San Diego to Seattle that include hotel bookings?

    Yes. In addition to deals on San Diego to Seattle flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from San Diego to Seattle?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from San Diego to Seattle.

  • Can I find deals for business class flights from San Diego to Seattle?

    Yes. Cheapflights offers flight deals from San Diego to Seattle by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

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

    Currently, February is the cheapest month in which you can book a flight from San Diego to Seattle (average of $60). Flying from San Diego to Seattle in July is currently the most expensive (average of $138). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near Seattle?

Book flights to Seattle if you plan to visit one of these locations
Tacoma
SeaTac
Lakewood
Ocean Shores
Olympia
Lynnwood
Edmonds
Lacey
Kent
Renton
Puyallup
Kirkland
Tukwila
Fife
Aberdeen
Shoreline
Marysville
Centralia
Federal Way
Chehalis

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for San Diego to Seattle

See prices for flight routes from nearby airports that may be better suited for you.

Top 7 airlines flying from San Diego to Seattle

Discover the top 7 airlines that operate flights from San Diego to Seattle. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated February 15, 2026.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$79Average$155FlexibilityNo cancel feeOn-time65%
FrontierCheapest$103Average$193FlexibilityNo cancel feeOn-time62%
DeltaCheapest$119Average$254FlexibilityNo cancel feeOn-timeN/A
Hawaiian AirlinesCheapest$128Average$278FlexibilityNo cancel feeOn-time85%
Alaska AirlinesCheapest$139Average$274FlexibilityNo cancel feeOn-time75%
SouthwestCheapest$166Average$292FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$289Average$457FlexibilityNo cancel feeOn-time71%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.