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$99+ 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 11/15. Fares are subject to change and may not be available on all flights or dates of travel.
SAN — SEA
Nov 9 — Nov 161
Sun 11/9
Sun 11/16
1 adult, Economy
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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”

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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 Tuesday

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 October 10, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$157
(Delta)

One-way from

$99
(Delta)

Popular in

July

Cheapest in

January

Average price

$208

Good round-trip deal

$235 or less

Good one-way deal

$170 or less
Provider with most accurate pricing for San Diego-Seattle/Tacoma Intl flight deals.
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Provider most trusted by Cheapflights users for San Diego-Seattle/Tacoma Intl flights.
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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. 10% potential increase in price ($27 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($5 potential savings vs. average RT price).
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Average for round-trip flights in October 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 October 10, 2025.

This Delta deal was found by Cheapflights users on 10/8. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/291:40 pmSAN - SEA
Nonstop3h 10mDelta
Tue 11/49:45 amSEA - SAN
Nonstop2h 53mDelta
Deal found 10/8$157
This Alaska Airlines deal was found by Cheapflights users on 10/8. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/295:25 pmSAN - SEA
Nonstop3h 09mAlaska Airlines
Sun 11/97:15 amSEA - SAN
Nonstop2h 57mAlaska Airlines
Deal found 10/8$158
This Alaska Airlines deal was found by Cheapflights users on 10/7. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/201:52 pmSAN - SEA
Nonstop3h 13mAlaska Airlines
Mon 12/86:06 pmSEA - SAN
Nonstop2h 51mAlaska Airlines
Deal found 10/7$159
This Trip.com deal was found by Cheapflights users on 10/7. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/301:52 pmSAN - SEA
Nonstop3h 13mHawaiian Airlines
Mon 11/310:00 amSEA - SAN
Nonstop2h 56mHawaiian Airlines
Deal found 10/7$160
This Kiwi.com deal was found by Cheapflights users on 10/8. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/222:11 pmSAN - SEA
2 stops25h 05mFrontier
Wed 10/2912:58 pmSEA - SAN
1 stop10h 52mFrontier
Deal found 10/8$161
This Southwest deal was found by Cheapflights users on 10/7. 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 10/283:35 pmSAN - SEA
2 stops6h 25mSouthwest
Tue 11/45:15 amSEA - SAN
1 stop5h 00mSouthwest
Deal found 10/7$162
This Frontier deal was found by Cheapflights users on 10/8. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/267:23 pmSAN - SEA
1 stop13h 25mFrontier
Mon 11/102:22 pmSEA - SAN
1 stop9h 28mFrontier
Deal found 10/8$163
This Kiwi.com deal was found by Cheapflights users on 10/7. 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.
Thu 10/303:59 pmSAN - SEA
1 stop26h 33mFrontier
Sat 11/812:58 pmSEA - SAN
1 stop9h 27mFrontier
Deal found 10/7$164
This Kiwi.com deal was found by Cheapflights users on 10/9. 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.
Mon 11/105:47 pmSAN - SEA
1 stop18h 20mMultiple Airlines
Sun 11/168:07 pmSEA - SAN
Nonstop2h 52mMultiple Airlines
Deal found 10/9$166
This Alaska Airlines deal was found by Cheapflights users on 10/7. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/306:15 amSAN - SEA
Nonstop3h 10mAlaska Airlines
Wed 11/58:07 pmSEA - SAN
Nonstop2h 52mAlaska Airlines
Deal found 10/7$167
This Alaska Airlines deal was found by Cheapflights users on 10/8. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/313:43 pmSAN - SEA
Nonstop3h 10mAlaska Airlines
Sun 11/98:07 pmSEA - SAN
Nonstop2h 52mAlaska Airlines
Deal found 10/8$168

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 October 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

Wed 11/5

11:24 am-2:45 pm

Nonstop3h 21m

Seattle/Tacoma Intl

Wed 11/12

11:25 am-2:14 pm

Nonstop2h 49m

$157

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Wed 10/29

6:15 am-9:25 am

Nonstop3h 10m

Seattle/Tacoma Intl

Mon 11/10

6:05 pm-8:56 pm

Nonstop2h 51m

$158

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Wed 11/12

11:01 am-2:18 pm

Nonstop3h 17m

Seattle/Tacoma Intl

Sun 11/16

7:10 am-10:06 am

Nonstop2h 56m

$158

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Thu 1/22

9:37 am-12:51 pm

Nonstop3h 14m

Seattle/Tacoma Intl

Sun 1/25

4:30 pm-7:16 pm

Nonstop2h 46m

$159

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Thu 12/4

3:15 pm-6:30 pm

Nonstop3h 15m

Seattle/Tacoma Intl

Sun 12/7

7:55 pm-10:45 pm

Nonstop2h 50m

$159

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Thu 11/6

6:15 am-9:25 am

Nonstop3h 10m

Seattle/Tacoma Intl

Sun 11/9

11:25 am-2:14 pm

Nonstop2h 49m

$159

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Wed 11/12

10:30 am-6:40 pm

2 stops8h 10m

Seattle/Tacoma Intl

Tue 11/18

8:10 am-1:50 pm

1 stop5h 40m

$162

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Thu 10/30

11:37 am-2:50 pm

Nonstop3h 13m

Seattle/Tacoma Intl

Tue 11/4

8:07 pm-10:59 pm

Nonstop2h 52m

$167

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Fri 10/31

1:52 pm-5:05 pm

Nonstop3h 13m

Seattle/Tacoma Intl

Sat 11/8

8:07 pm-10:59 pm

Nonstop2h 52m

$167

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Fri 10/31

6:15 am-9:25 am

Nonstop3h 10m

Seattle/Tacoma Intl

Sun 11/9

7:15 am-10:12 am

Nonstop2h 57m

$168

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/9

Showing 1-10 of 21 results
1
2
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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 October.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
PricelinePrice Accuracy1 starTrust Score*3 stars
CheapflightsfaresPrice Accuracy2 starsTrust Score*1 star
CheapfaremartPrice Accuracy-Trust Score*1 star
CheapTicketsDealPrice Accuracy3 starsTrust Score*3 stars
Kiwi.comPrice Accuracy3 starsTrust Score*3 stars
CheapOairPrice Accuracy3 starsTrust Score*3 stars
JustAirTicketPrice Accuracy-Trust 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 October 3, 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, February is the cheapest month in which you can book a flight from San Diego to Seattle (average of $53). Flying from San Diego to Seattle in July is currently the most expensive (average of $134). 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 October 10, 2025.

It’s typically best to fly out from San Diego to Seattle in the afternoon. Doing so could potentially save you 18% on the flight price compared to flying at noon, 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 October 5, 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.

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

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 October 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
11,049 reviews

Comfort

7.8

Entertainment

7.0

Boarding

8.1

Food

7.1

Overall

8.0

Crew

8.5

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
11,049 reviews
Alaska Airlines
8.0
Very good
11,049 reviews

Comfort

7.8

Entertainment

7.0

Boarding

8.1

Food

7.1

Overall

8.0

Crew

8.5

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
7,971 reviews
Alaska Airlines
8.0
Very good
11,049 reviews

Comfort

7.8

Entertainment

7.0

Boarding

8.1

Food

7.1

Overall

8.0

Crew

8.5

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
2,775 reviews
Alaska Airlines
8.0
Very good
11,049 reviews

Comfort

7.8

Entertainment

7.0

Boarding

8.1

Food

7.1

Overall

8.0

Crew

8.5

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
8,087 reviews
Alaska Airlines
8.0
Very good
11,049 reviews

Comfort

7.8

Entertainment

7.0

Boarding

8.1

Food

7.1

Overall

8.0

Crew

8.5

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
3,143 reviews
Alaska Airlines
8.0
Very good
11,049 reviews

Comfort

7.8

Entertainment

7.0

Boarding

8.1

Food

7.1

Overall

8.0

Crew

8.5

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 3h 04m for a nonstop flight. There are 39 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, 133 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 10m. Delta provides one of the quickest options available for as low as $158. 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 $66. Additional round-trip tickets that might be worth considering are offered by Frontier and American Airlines, with the lowest prices starting at $100 and $113, respectively. Spirit Airlines is priced at 73% 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 KLM (88%), Air France (88%) or Delta (87%) 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 $1,079, 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 $127 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 $53). Flying from San Diego to Seattle in July is currently the most expensive (average of $134). 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
Renton
Lacey
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 October 10, 2025.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$66Average$162FlexibilityNo cancel feeOn-time65%
FrontierCheapest$100Average$169FlexibilityNo cancel feeOn-time62%
American AirlinesCheapest$113Average$392FlexibilityNo cancel feeOn-time71%
DeltaCheapest$137Average$254FlexibilityNo cancel feeOn-timeN/A
Alaska AirlinesCheapest$150Average$276FlexibilityNo cancel feeOn-time75%
Hawaiian AirlinesCheapest$159Average$283FlexibilityNo cancel feeOn-time85%
SouthwestCheapest$166Average$296FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$216Average$341FlexibilityNo cancel feeOn-time69%

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