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Cheap flights from San Diego to Seattle from £74

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 28/4. Fares are subject to change and may not be available on all flights or dates of travel.
SAN — SEA
3 May — 10 May1
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 69 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 3 April 2026.

Fri 24/414:15
SAN
-
SEA
Nonstop3h 05m
Southwest
Mon 27/411:05
SEA
-
SAN
Nonstop2h 45m
Southwest
Deal found 1/4£93
Sat 2/514:55
SAN
-
SEA
Nonstop3h 00m
Southwest
Thu 7/509:40
SEA
-
SAN
1 stop4h 15m
Southwest
Deal found 1/4£98
Thu 23/415:45
SAN
-
SEA
2 stops6h 45m
Southwest
Sat 25/411:15
SEA
-
SAN
Nonstop2h 50m
Southwest
Deal found 1/4£104
Tue 28/406:30
SAN
-
SEA
2 stops6h 55m
Southwest
Fri 1/509:40
SEA
-
SAN
1 stop4h 15m
Southwest
Deal found 1/4£109
Fri 24/418:55
SAN
-
SEA
1 stop6h 00m
Southwest
Sat 9/506:40
SEA
-
SAN
2 stops9h 45m
Southwest
Deal found 1/4£112
Tue 2/607:15
SAN
-
SEA
Nonstop3h 13m
Delta
Thu 4/615:20
SEA
-
SAN
Nonstop2h 45m
Delta
Deal found 1/4£123
Tue 16/611:05
SAN
-
SEA
Nonstop3h 16m
Delta
Wed 24/619:45
SEA
-
SAN
Nonstop2h 53m
Delta
Deal found 31/3£125
Sat 9/519:35
SAN
-
SEA
Nonstop3h 18m
Alaska Airlines
Thu 14/521:09
SEA
-
SAN
Nonstop2h 50m
Alaska Airlines
Deal found 1/4£127

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 3 April 2026.

Round-trip from

£93

One-way from

£74

Popular in

March

Cheapest in

February

Average price

£187
Southwest
  • Southwest
  • 24/4-27/4
  • Nonstop
  • 5h 50m total
  • San Diego to Seattle
Search Deals
United Airlines
  • United Airlines
  • 28/4
  • 2 total stops
  • 9h 56m total
  • San Diego to Seattle
Search Deals
High demand for flights, 1% potential price rise
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 April 2026
Search Deals

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 3 April 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

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Sat 2/5

08:40-18:15

2 stops9h 35m

Seattle/Tacoma Intl

Thu 7/5

11:05-13:50

Nonstop2h 45m

£104
Fastest return journey

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Thu 28/5

11:18-14:30

Nonstop3h 12m

Seattle/Tacoma Intl

Mon 1/6

13:30-16:21

Nonstop2h 51m

£164

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Wed 22/4

07:30-10:44

Nonstop3h 14m

Seattle/Tacoma Intl

Sat 25/4

19:35-22:29

Nonstop2h 54m

£164

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Wed 29/4

18:51-22:05

Nonstop3h 14m

Seattle/Tacoma Intl

Sun 3/5

11:45-14:38

Nonstop2h 53m

£164

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Fri 15/5

13:37-16:44

Nonstop3h 07m

Seattle/Tacoma Intl

Mon 18/5

11:45-14:48

Nonstop3h 03m

£164

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Sat 25/4

14:00-19:40

1 stop5h 40m

Seattle/Tacoma Intl

Sun 26/4

11:45-14:40

Nonstop2h 55m

£172

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Thu 23/4

18:00-22:30

1 stop4h 30m

Seattle/Tacoma Intl

Sun 26/4

11:45-14:40

Nonstop2h 55m

£172

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Thu 28/5

19:10-22:24

Nonstop3h 14m

Seattle/Tacoma Intl

Sun 31/5

19:35-22:26

Nonstop2h 51m

£197

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Thu 21/5

21:03-08:49

1 stop11h 46m

Seattle/Tacoma Intl

Mon 25/5

06:26-09:15

Nonstop2h 49m

£200

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Tue 16/6

19:10-22:20

Nonstop3h 10m

Seattle/Tacoma Intl

Fri 19/6

19:45-22:38

Nonstop2h 53m

£206

Flights are sorted by cheapest return flights first.

Deals found on 31/3

Showing 1-10 of 22 resultsSorted by cheapest first
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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?

Use this chart to determine the optimal time to book a return flight from San Diego to Seattle. Price data was last updated on 2 April 2026.

Booking 69 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, January is the cheapest month in which you can book a flight from San Diego to Seattle (average of £48). Flying from San Diego to Seattle in July is currently the most expensive (average of £104). 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 3 April 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 afternoon 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 £164, Southwest can have you in Seattle from San Diego in 3h 12m. 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 Icelandair (93%), WestJet (92%) and Air Tahiti Nui (92%).

  • 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, January is the cheapest month in which you can book a flight from San Diego to Seattle (average of £48). Flying from San Diego to Seattle in July is currently the most expensive (average of £104). 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

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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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