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$109+ 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 11/27. Fares are subject to change and may not be available on all flights or dates of travel.
SAN — SEA
Oct 10 — Oct 171
Fri 10/10
Fri 10/17
1 adult, Economy
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Cheapflights Tip: The best prices from San Diego to Seattle/Tacoma Intl are usually found in January or October, booked 58 days in advance, depart on a Thursday or Friday and return on a Wednesday

Cheap 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 September 10, 2025.

Round-trip from

$154
(Southwest)

One-way from

$109
(Delta)

Popular in

July

Cheapest in

January

Average price

$197

Good round-trip deal

$229 or less

Good one-way deal

$153 or less
From San Diego to Seattle/Tacoma Intl
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One-way flight from San Diego to Seattle/Tacoma Intl
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Highest demand for flights based on searches. 13% potential increase in price ($36 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($5 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Price to beat on a round-trip flight from San Diego to Seattle/Tacoma Intl.
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Price to beat on a one-way flight from San Diego to Seattle/Tacoma Intl.
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Find 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 September 10, 2025.

This Southwest deal was found by Cheapflights users on 9/9. 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 10/173:30 pmSAN - SEA
1 stop6h 50mSouthwest
Tue 10/211:20 pmSEA - SAN
1 stop4h 20mSouthwest
Deal found 9/9$154
This Flightnetwork deal was found by Cheapflights users on 9/8. 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 Flightnetwork is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/167:15 amSAN - SEA
1 stop15h 44mFrontier
Sat 9/207:00 amSEA - SAN
1 stop15h 24mFrontier
Deal found 9/8$155
This CheapOair deal was found by Cheapflights users on 9/8. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/117:00 amSAN - SEA
1 stop24h 33mFrontier
Fri 10/178:43 pmSEA - SAN
1 stop16h 45mFrontier
Deal found 9/8$156
This Kiwi.com deal was found by Cheapflights users on 9/9. 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.
Sat 10/47:15 amSAN - SEA
1 stop13h 24mFrontier
Mon 10/61:47 pmSEA - SAN
1 stop9h 30mFrontier
Deal found 9/9$157
This Kiwi.com deal was found by Cheapflights users on 9/9. 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.
Sat 9/277:15 amSAN - SEA
1 stop13h 24mFrontier
Thu 10/26:12 amSEA - SAN
1 stop17h 41mFrontier
Deal found 9/9$158
This Southwest deal was found by Cheapflights users on 9/9. 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 12/69:40 amSAN - SEA
1 stop7h 10mSouthwest
Mon 12/88:10 amSEA - SAN
1 stop5h 40mSouthwest
Deal found 9/9$159
This KAYAK deal was found by Cheapflights users on 9/8. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/303:45 pmSAN - SEA
Nonstop3h 03mAlaska Airlines
Tue 10/75:59 pmSEA - SAN
Nonstop2h 54mAlaska Airlines
Deal found 9/8$161
This Kiwi.com deal was found by Cheapflights users on 9/9. 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 10/1710:52 amSAN - SEA
1 stop6h 52mFrontier
Thu 10/234:26 pmSEA - SAN
1 stop6h 38mFrontier
Deal found 9/9$164
This Southwest deal was found by Cheapflights users on 9/9. 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.
Wed 10/153:35 pmSAN - SEA
2 stops6h 25mSouthwest
Wed 10/229:15 amSEA - SAN
1 stop4h 10mSouthwest
Deal found 9/9$165
This Frontier deal was found by Cheapflights users on 9/10. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/266:25 amSAN - SEA
1 stop9h 20mFrontier
Mon 9/291:47 pmSEA - SAN
1 stop9h 30mFrontier
Deal found 9/10$166
This Southwest deal was found by Cheapflights users on 9/10. 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.
Thu 10/95:50 pmSAN - SEA
1 stop7h 00mSouthwest
Mon 10/136:15 amSEA - SAN
1 stop4h 15mSouthwest
Deal found 9/10$167

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 September 10, 2025.
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

Fri 10/17

7:35 pm-12:50 am

1 stop5h 15m

Seattle/Tacoma Intl

Sat 10/18

6:35 am-11:20 am

1 stop4h 45m

$161

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Mon 11/10

7:20 pm-12:30 am

1 stop5h 10m

Seattle/Tacoma Intl

Sat 11/15

12:10 pm-7:15 pm

2 stops7h 05m

$164

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Thu 10/9

5:50 pm-12:50 am

1 stop7h 00m

Seattle/Tacoma Intl

Mon 10/13

6:15 am-10:30 am

1 stop4h 15m

$167

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Fri 11/7

7:20 pm-12:30 am

1 stop5h 10m

Seattle/Tacoma Intl

Tue 11/11

5:15 am-11:45 am

1 stop6h 30m

$170

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Wed 10/1

7:29 am-10:35 am

Nonstop3h 06m

Seattle/Tacoma Intl

Sat 10/4

7:30 pm-10:24 pm

Nonstop2h 54m

$177

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Wed 10/15

8:00 am-11:12 am

Nonstop3h 12m

Seattle/Tacoma Intl

Sat 10/18

8:10 pm-11:05 pm

Nonstop2h 55m

$177

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Tue 9/30

11:03 am-2:10 pm

Nonstop3h 07m

Seattle/Tacoma Intl

Tue 10/7

7:30 am-10:26 am

Nonstop2h 56m

$177

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Tue 12/2

6:15 am-9:35 am

Nonstop3h 20m

Seattle/Tacoma Intl

Tue 12/9

9:50 am-12:45 pm

Nonstop2h 55m

$177

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Wed 10/8

11:24 am-2:45 pm

Nonstop3h 21m

Seattle/Tacoma Intl

Wed 10/15

7:30 am-10:26 am

Nonstop2h 56m

$177

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Wed 10/1

7:15 pm-10:25 pm

Nonstop3h 10m

Seattle/Tacoma Intl

Sat 10/11

7:45 pm-10:31 pm

Nonstop2h 46m

$177

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/8

Showing 1-10 of 21 results
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The best insider tips for San Diego to Seattle flights

Snippets provided in this section are AI-generated based on a summarization of Cheapflights-commissioned articles. The articles are presented as-is, for general informational purposes only, and may not be up-to-date. The opinions contained in the articles are original to the author and reflect their authentic experience, which may vary significantly from the experience of others.
Cheapflights partnered with top experts to bring you the best recommendations for your San Diego to Seattle trip
Airports
SAN

Plan to arrive at SAN at least two hours before your flight to avoid stress from traffic congestion near the airport.

Read more about SANby Blane Bachelor
SEA

Use the Link light rail from SEA to downtown Seattle for an affordable and efficient 40-minute journey.

Read more about SEAby Brandon Schultz
Our travel experts
Blane Bachelor

Blane Bachelor

Expert on SAN

Blane Bachelor

Blane Bachelor

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.

Read more
Brandon Schultz

Brandon Schultz

Expert on SEA

Brandon Schultz

Brandon Schultz

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.

Read more

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 August 29, 2025.

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 58 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, January is the cheapest month in which you can book a flight from San Diego to Seattle (average of $238). Flying from San Diego to Seattle in June is currently the most expensive (average of $388). 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 September 10, 2025.

It’s typically best to fly out from San Diego to Seattle in the afternoon. Doing so could potentially save you 20% 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 September 7, 2025.

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.

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 September 10, 2025.
Get a feel of what it's like to fly with Alaska Airlines, Delta, and Hawaiian Airlines 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.
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Entertainment

7.0

Comfort

7.8

Food

7.1

Crew

8.5

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Aug 2025

MFR - SEA

Great smooth flight. Was hour and half late though. Don't know why
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Entertainment

7.0

Comfort

7.8

Food

7.1

Crew

8.5

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Aug 2025

MFR - SEA

Great smooth flight. Was hour and half late though. Don't know why
Delta
8.0
Very good
7,963 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Entertainment

7.0

Comfort

7.8

Food

7.1

Crew

8.5

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Aug 2025

MFR - SEA

Great smooth flight. Was hour and half late though. Don't know why
Hawaiian Airlines
7.8
Good
2,723 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Entertainment

7.0

Comfort

7.8

Food

7.1

Crew

8.5

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Aug 2025

MFR - SEA

Great smooth flight. Was hour and half late though. Don't know why
Spirit Airlines
6.3
Okay
8,024 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Entertainment

7.0

Comfort

7.8

Food

7.1

Crew

8.5

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Aug 2025

MFR - SEA

Great smooth flight. Was hour and half late though. Don't know why
Frontier
5.8
Fair
3,181 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Entertainment

7.0

Comfort

7.8

Food

7.1

Crew

8.5

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Aug 2025

MFR - SEA

Great smooth flight. Was hour and half late though. Don't know why

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 2h 56m for a nonstop flight. There are 42 flights from San Diego to Seattle per day from 8 airlines.

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

    Within the past month, 130 users have taken a look at flights from San Diego to Seattle/Tacoma Intl.

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

    A quick flight from San Diego to Seattle can take about 3h 06m. Southwest provides one of the quickest options available for as low as $177. Airlines will cover a distance of 1051 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • 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 $66. Additional round-trip tickets that might be worth considering are offered by Frontier and American Airlines, with the lowest prices starting at $99 and $113, respectively. Spirit Airlines is priced at 72% lower than the current average price of a flight leaving 3 months from now.

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

    Consider Scandinavian Airlines (92%), KLM (90%) or WestJet (85%) 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 $629, our data shows the cheapest flight currently is $108. When looking at the most popular route, (San Diego - Seattle/Tacoma Intl), you can expect to pay $124 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, January is the cheapest month in which you can book a flight from San Diego to Seattle (average of $238). Flying from San Diego to Seattle in June is currently the most expensive (average of $388). 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
SeaTac
Tukwila
Tacoma
Lakewood
Ocean Shores
Lynnwood
Edmonds
Leavenworth
Lacey
Renton
Olympia
Kent
Federal Way
Cle Elum
Puyallup
Chehalis
Kirkland
Issaquah
Aberdeen
Shoreline

Browse thousands of different options on Cheapflights for your next trip

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Top 8 airlines flying from San Diego to Seattle

Discover the top 8 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 September 10, 2025.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$66Average$162FlexibilityNo cancel feeOn-time65%
FrontierCheapest$99Average$175FlexibilityNo cancel feeOn-time62%
American AirlinesCheapest$113Average$392FlexibilityNo cancel feeOn-time71%
DeltaCheapest$127Average$245FlexibilityNo cancel feeOn-timeN/A
Alaska AirlinesCheapest$148Average$275FlexibilityNo cancel feeOn-time75%
Hawaiian AirlinesCheapest$163Average$281FlexibilityNo cancel feeOn-time85%
SouthwestCheapest$176Average$306FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$216Average$341FlexibilityNo cancel feeOn-time69%

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