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Cheap flights from San Diego to Seattle from £79

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 17/9. Fares are subject to change and may not be available on all flights or dates of travel.
SAN — SEA
23 Aug — 30 Aug1
1 adult

Cheapflights Tip: The best prices from San Diego to Seattle/Tacoma Intl are usually found in January or October, booked 63 days in advance, depart on a Tuesday or Wednesday and return on a Monday

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 18 August 2025.

Round-trip from

£123

One-way from

£79

Popular in

July

Cheapest in

January

Average price

£190
Alaska Airlines
  • Alaska Airlines
  • 20/10-21/10
  • 1 total stop
  • 23h 39m total
  • San Diego to Seattle
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Alaska Airlines
  • Alaska Airlines
  • 17/9
  • 2 total stops
  • 12h 44m total
  • San Diego to Seattle
Search Deals
Highest demand for flights based on searches. 13% potential increase in price (£19 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (£4 potential savings vs. average return price).
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Average for round-trip flights in August 2025
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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 18 August 2025.

Mon 20/1020:19SAN - SEA
1 stop20h 41mAlaska Airlines
Tue 21/1019:15SEA - SAN
Nonstop2h 58mAlaska Airlines
Deal found 16/8£123
Sat 8/1109:10SAN - SEA
1 stop7h 30mAlaska Airlines
Sat 8/1120:07SEA - SAN
Nonstop2h 52mAlaska Airlines
Deal found 17/8£130
Tue 4/1111:24SAN - SEA
Nonstop3h 21mDelta
Tue 11/1119:59SEA - SAN
Nonstop2h 50mDelta
Deal found 17/8£131
Sat 13/911:03SAN - SEA
Nonstop3h 07mDelta
Mon 15/910:00SEA - SAN
Nonstop2h 57mDelta
Deal found 16/8£138
Sat 13/915:35SAN - SEA
Nonstop2h 57mDelta
Sun 14/907:10SEA - SAN
Nonstop2h 48mDelta
Deal found 17/8£139
Wed 10/907:30SAN - SEA
1 stop5h 50mSouthwest
Sat 13/909:15SEA - SAN
2 stops7h 40mSouthwest
Deal found 15/8£142
Thu 25/919:45SAN - SEA
Nonstop3h 14mHawaiian Airlines
Mon 29/918:59SEA - SAN
Nonstop2h 58mHawaiian Airlines
Deal found 17/8£145
Wed 8/1015:35SAN - SEA
2 stops6h 25mSouthwest
Tue 21/1013:20SEA - SAN
1 stop4h 20mSouthwest
Deal found 16/8£146
Sat 6/908:15SAN - SEA
1 stop7h 30mSouthwest
Sat 13/909:15SEA - SAN
2 stops7h 40mSouthwest
Deal found 16/8£149
Tue 4/1110:25SAN - SEA
1 stop6h 38mAlaska Airlines
Fri 14/1110:05SEA - SAN
1 stop4h 30mAlaska Airlines
Deal found 17/8£152
Wed 17/907:15SAN - SEA
Nonstop3h 05mAlaska Airlines
Sat 20/909:59SEA - SAN
1 stop4h 27mAlaska Airlines
Deal found 15/8£153
Fri 12/907:00SAN - SEA
1 stop4h 30mSouthwest
Sat 20/909:15SEA - SAN
2 stops7h 40mSouthwest
Deal found 16/8£153

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 18 August 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

Mon 20/10

20:19-17:00

1 stop20h 41m

Seattle/Tacoma Intl

Tue 21/10

19:15-22:13

Nonstop2h 58m

£123

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Thu 23/10

06:15-09:20

Nonstop3h 05m

Seattle/Tacoma Intl

Thu 23/10

12:00-20:49

1 stop8h 49m

£123

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Wed 10/9

07:30-10:34

Nonstop3h 04m

Seattle/Tacoma Intl

Sat 13/9

07:10-09:58

Nonstop2h 48m

£131

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Sat 8/11

06:30-09:47

Nonstop3h 17m

Seattle/Tacoma Intl

Wed 12/11

15:15-18:00

Nonstop2h 45m

£131

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Sat 13/9

13:59-16:59

Nonstop3h 00m

Seattle/Tacoma Intl

Sat 20/9

10:00-12:57

Nonstop2h 57m

£131

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Tue 16/9

07:29-10:35

Nonstop3h 06m

Seattle/Tacoma Intl

Sat 20/9

11:40-14:35

Nonstop2h 55m

£131

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Sat 20/9

11:03-14:10

Nonstop3h 07m

Seattle/Tacoma Intl

Sat 27/9

11:40-14:35

Nonstop2h 55m

£131

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Tue 16/9

07:29-10:35

Nonstop3h 06m

Seattle/Tacoma Intl

Tue 23/9

19:35-22:29

Nonstop2h 54m

£131

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Sat 27/9

11:03-14:10

Nonstop3h 07m

Seattle/Tacoma Intl

Sat 4/10

11:40-14:35

Nonstop2h 55m

£131

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Tue 7/10

06:15-09:25

Nonstop3h 10m

Seattle/Tacoma Intl

Tue 21/10

07:30-10:26

Nonstop2h 56m

£131

Flights are sorted by cheapest return flights first.

Deals found on 16/8

Showing 1-10 of 20 results
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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 8 August 2025.

Booking 63 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 £622). Flying from San Diego to Seattle in July is currently the most expensive (average of £946). 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 18 August 2025.

One of the essential ways to save on airfare from San Diego to Seattle is to remain as flexible as possible. Flights that are in the afternoon tend to be the most expensive. A flight at midday could potentially save you up to 63% on airfare.

Weekly flight availability from San Diego to Seattle

Explore weekly flight availability from San Diego to Seattle. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated 18 August 2025.

The most flights from SAN to SEA are scheduled on a Sunday (70 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (14 on average).

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, 5 users have taken a look at flights from San Diego to Seattle/Tacoma Intl.

  • 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 Virgin Atlantic (83%), Delta (82%) and WestJet (82%).

  • 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 £622). Flying from San Diego to Seattle in July is currently the most expensive (average of £946). 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
Leavenworth
Bothell
SeaTac

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