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Cheap flights from San Diego to Seattle from £81

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 24/7. Fares are subject to change and may not be available on all flights or dates of travel.
SAN — SEA
27 Jul — 3 Aug1
1 adult
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from San Diego to Seattle/Tacoma Intl are usually found in February or January, booked 86 days in advance, depart on a Tuesday or Monday and return on a Monday

Cheap flight deals from San Diego to Seattle

Enter your travel dates to find the best prices.

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 27 June 2026.

Sat 8/816:11
SAN
-
SEA
Nonstop2h 54m
Delta
Sat 15/817:55
SEA
-
SAN
Nonstop2h 53m
Delta
Deal found 25/6£134
Tue 18/806:45
SAN
-
SEA
1 stop6h 35m
Southwest
Sat 22/809:20
SEA
-
SAN
Nonstop2h 45m
Southwest
Deal found 22/6£138
Fri 4/916:11
SAN
-
SEA
Nonstop2h 54m
Delta
Sun 6/909:45
SEA
-
SAN
Nonstop2h 54m
Delta
Deal found 23/6£142
Fri 21/817:00
SAN
-
SEA
1 stop4h 41m
United Airlines
Wed 26/807:11
SEA
-
SAN
1 stop5h 02m
United Airlines
Deal found 23/6£142
Tue 4/818:27
SAN
-
SEA
1 stop4h 43m
United Airlines
Wed 12/813:16
SEA
-
SAN
1 stop7h 29m
United Airlines
Deal found 24/6£143
Sat 22/810:45
SAN
-
SEA
1 stop6h 11m
Alaska Airlines
Sat 22/820:49
SEA
-
SAN
Nonstop2h 55m
Alaska Airlines
Deal found 23/6£145
Tue 1/916:10
SAN
-
SEA
2 stops5h 35m
Southwest
Fri 11/917:50
SEA
-
SAN
Nonstop2h 55m
Southwest
Deal found 23/6£145
Tue 18/814:24
SAN
-
SEA
1 stop4h 43m
United Airlines
Tue 25/813:16
SEA
-
SAN
2 stops6h 39m
United Airlines
Deal found 27/6£146
Thu 13/816:11
SAN
-
SEA
Nonstop2h 54m
Delta
Sat 22/807:15
SEA
-
SAN
Nonstop2h 56m
Delta
Deal found 23/6£149
Wed 22/714:40
SAN
-
SEA
1 stop4h 10m
Southwest
Wed 29/707:30
SEA
-
SAN
2 stops7h 20m
Southwest
Deal found 23/6£150
Tue 28/710:30
SAN
-
SEA
1 stop6h 36m
Alaska Airlines
Tue 28/721:04
SEA
-
SAN
Nonstop2h 52m
Alaska Airlines
Deal found 25/6£152
Sat 8/807:03
SAN
-
SEA
Nonstop3h 02m
Delta
Mon 10/809:45
SEA
-
SAN
Nonstop2h 54m
Delta
Deal found 23/6£153

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 27 June 2026.

Round-trip from

£134

One-way from

£81

Popular in

July

Cheapest in

February

Average price

£228

Good round-trip deal

£334 or less
Alaska Airlines
  • Alaska Airlines
  • 8/8-11/8
  • Nonstop
  • 6h 01m total
  • San Diego to Seattle
Search Deals
United Airlines
  • United Airlines
  • 10/12
  • 1 total stop
  • 4h 52m total
  • San Diego to Seattle
Search Deals
Highest demand for flights based on searches. 13% potential increase in price (£22 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (£4 potential savings vs. average return price).
Search Deals
Average for round-trip flights in June 2026
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Price to beat on a round-trip flight from San Diego to Seattle/Tacoma Intl.
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Cheapflights Fare Finder

 
Customise 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 858,174 searches. Data last updated 27 June 2026.
Use the filters below to find and compare flights from San Diego to Seattle that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight
Fastest return journey

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Sun 6/9

11:06-14:15

Nonstop3h 09m

Seattle/Tacoma Intl

Tue 22/9

19:41-22:33

Nonstop2h 52m

£134

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Tue 25/8

17:00-21:45

1 stop4h 45m

Seattle/Tacoma Intl

Wed 26/8

17:30-20:20

Nonstop2h 50m

£134

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Wed 12/8

16:10-21:45

2 stops5h 35m

Seattle/Tacoma Intl

Fri 21/8

17:50-20:45

Nonstop2h 55m

£142

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Thu 20/8

16:20-21:50

1 stop5h 30m

Seattle/Tacoma Intl

Tue 25/8

08:30-11:25

Nonstop2h 55m

£145

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Thu 27/8

18:40-00:20

1 stop5h 40m

Seattle/Tacoma Intl

Mon 31/8

17:50-20:45

Nonstop2h 55m

£157

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Wed 2/9

07:15-10:25

Nonstop3h 10m

Seattle/Tacoma Intl

Wed 9/9

07:13-18:37

1 stop11h 24m

£159

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Thu 1/10

17:40-20:40

Nonstop3h 00m

Seattle/Tacoma Intl

Mon 12/10

05:20-10:50

1 stop5h 30m

£161
Cheapest one-way

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Thu 3/9

07:03-10:05

Nonstop3h 02m

£86

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Wed 26/8

06:15-09:20

Nonstop3h 05m

£86

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Tue 3/11

13:35-16:44

Nonstop3h 09m

£86

Flights are sorted by cheapest return flights first.

Deals found on 22/6

Showing 1-10 of 19 resultsSorted by cheapest first
1
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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 return 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?

Booking 85 days in advance of your planned departure date is, on average, the best time to get cheap flights from San Diego to Seattle. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

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 £149). Flying from San Diego to Seattle in July is currently the most expensive (average of £235). 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 27 June 2026.

One of the essential ways to save on airfare from San Diego to Seattle is to remain as flexible as possible. Flights that are at midday tend to be the most expensive. A flight in the evening could potentially save you up to 46% on airfare.

How much does it cost for a return flight from San Diego to Seattle?

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.

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

    Within the past month, 3 users have taken a look at flights from San Diego to Seattle/Tacoma Intl.

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

    For as low as £134, Delta can have you in Seattle from San Diego in 3h 09m. The distance between San Diego and Seattle is about 1051 mi. This flight may include one or multiple stops.

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

    The top 3 most reliable airlines when flying from San Diego to Seattle are Scandinavian Airlines (95%), Hawaiian Airlines (94%) and Air France (92%).

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

    While on average a flight from San Diego to Seattle is generally £485, our data shows the cheapest flight currently is £306. When looking at the most popular route, (San Diego - Seattle/Tacoma Intl), you can expect to pay £126 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 holiday 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 £149). Flying from San Diego to Seattle in July is currently the most expensive (average of £235). 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

Travelling to a place near Seattle?

Book flights to Seattle if you plan to visit one of these locations
Tacoma
Federal Way
SeaTac

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Alternative routes for San Diego to Seattle

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

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How does Cheapflights help users find flights from San Diego to Seattle?

Cheapflights makes it easy to find San Diego to Seattle flights by helping our users search from 900+ travel sites for deals. We also provide you with filters for cabin, price, airline, airports, number of stops, and many more to narrow down that perfect flight.

Why should you use Cheapflights to find cheap flight tickets from San Diego to Seattle?

Millions of users choose and trust Cheapflights to book the best flight deals from San Diego to Seattle for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.

Can Cheapflights find flights from San Diego to Seattle with no change fees?

Yes, we can. To see specific flights from San Diego to Seattle with no change fees, users can toggle flexible booking options after using the search form above to find flights.

Can Cheapflights notify me if prices for flights from San Diego to Seattle become cheaper?

Of course! You can now track prices for flights from San Diego to Seattle and get an alert from Cheapflights when they change. Have a valid email address ready and click the bell icon next to the flight deals above to set up your price alerts.

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