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Cheap flights from San Diego to Seattle from £72

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 30/9. Fares are subject to change and may not be available on all flights or dates of travel.
SAN — SEA
12 Sep — 19 Sep1
1 adult
1 adult, Economy, 0 bags

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 13 August 2026.

Sat 5/916:11 -
Nonstop2h 54m
Sun 6/909:45 -
Nonstop2h 54m
Deal found 12/8£116
Tue 13/1006:25 -
1 stop27h 26m
Wed 21/1021:16 -
1 stop12h 04m
Deal found 11/8£119
Tue 8/907:00 -
Nonstop3h 05m
Fri 11/917:50 -
Nonstop3h 00m
Deal found 10/8£122
Thu 26/1114:55 -
Nonstop3h 05m
Thu 3/1207:00 -
Nonstop2h 40m
Deal found 12/8£123
Sat 5/916:05 -
1 stop4h 25m
Fri 11/917:50 -
Nonstop3h 00m
Deal found 9/8£124
Wed 2/907:00 -
Nonstop3h 05m
Fri 11/917:50 -
Nonstop3h 00m
Deal found 10/8£124
Sat 5/921:51 -
1 stop10h 12m
Sun 6/908:48 -
Nonstop2h 57m
Deal found 12/8£127
Fri 11/919:05 -
1 stop5h 40m
Wed 16/908:30 -
Nonstop2h 55m
Deal found 12/8£129

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 13 August 2026.

Round-trip from

£116

One-way from

£72

Popular in

July

Cheapest in

February

Average price

£198
Delta
  • Delta
  • 6/9-11/9
  • Nonstop
  • 5h 56m total
  • San Diego to Seattle
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United Airlines
  • United Airlines
  • 17/10
  • 2 total stops
  • 8h 02m total
  • San Diego to Seattle
Search Deals
Highest demand for flights based on searches. 14% potential increase in price (£24 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (£5 potential savings vs. average return price).
Search Deals
Average for round-trip flights in August 2026
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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 13 August 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 San Diego - SEA Seattle/Tacoma Intl

SANSEA

San Diego

Sat 5/9

16:05-20:30

1 stop4h 25m

Seattle/Tacoma Intl

Fri 11/9

17:50-20:50

Nonstop3h 00m

£124

San DiegoSeattle

SAN San Diego - SEA Seattle/Tacoma Intl

SANSEA

San Diego

Wed 9/9

14:24-20:43

2 stops6h 19m

Seattle/Tacoma Intl

Thu 10/9

09:00-13:44

1 stop4h 44m

£139

San DiegoSeattle

SAN San Diego - SEA Seattle/Tacoma Intl

SANSEA

San Diego

Thu 26/11

14:55-18:00

Nonstop3h 05m

Seattle/Tacoma Intl

Thu 3/12

05:40-11:25

1 stop5h 45m

£139

San DiegoSeattle

SAN San Diego - SEA Seattle/Tacoma Intl

SANSEA

San Diego

Fri 11/9

19:05-00:45

1 stop5h 40m

Seattle/Tacoma Intl

Tue 15/9

05:55-11:45

2 stops5h 50m

£141

San DiegoSeattle

SAN San Diego - SEA Seattle/Tacoma Intl

SANSEA

San Diego

Tue 8/9

07:00-10:05

Nonstop3h 05m

Seattle/Tacoma Intl

Tue 15/9

08:30-11:25

Nonstop2h 55m

£149

San DiegoSeattle

SAN San Diego - SEA Seattle/Tacoma Intl

SANSEA

San Diego

Tue 6/10

06:15-09:28

Nonstop3h 13m

Seattle/Tacoma Intl

Sun 11/10

21:08-23:59

Nonstop2h 51m

£150
Fastest return journey

San DiegoSeattle

SAN San Diego - SEA Seattle/Tacoma Intl

SANSEA

San Diego

Thu 24/9

16:23-19:20

Nonstop2h 57m

Seattle/Tacoma Intl

Sat 26/9

18:15-21:09

Nonstop2h 54m

£150

San DiegoSeattle

SAN San Diego - SEA Seattle/Tacoma Intl

SANSEA

San Diego

Sat 5/9

21:51-08:03

1 stop10h 12m

Seattle/Tacoma Intl

Sun 6/9

08:48-11:45

Nonstop2h 57m

£152

San DiegoSeattle

SAN San Diego - SEA Seattle/Tacoma Intl

SANSEA

San Diego

Fri 16/10

09:20-12:28

Nonstop3h 08m

Seattle/Tacoma Intl

Mon 19/10

16:54-19:43

Nonstop2h 49m

£153

San DiegoSeattle

SAN San Diego - SEA Seattle/Tacoma Intl

SANSEA

San Diego

Wed 16/9

08:15-15:10

1 stop6h 55m

Seattle/Tacoma Intl

Sat 19/9

09:15-12:00

Nonstop2h 45m

£153

Flights are sorted by cheapest return flights first.

Deals found on 12/8

Showing 1-10 of 21 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?

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 £146). Flying from San Diego to Seattle in July is currently the most expensive (average of £241). 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 13 August 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?

Airfare is below average for this route at the moment.

San Diego to Seattle flights typically cost between £150 and £256 in September.
The cheapest return price found within the last 5 days was £116 on Delta (5 Sept–6 Sept).

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, 2 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 £117, Delta can have you in Seattle from San Diego in 2h 54m. 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 (90%), WestJet (88%) and Virgin Atlantic (87%).

  • 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 £146). Flying from San Diego to Seattle in July is currently the most expensive (average of £241). 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
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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