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Cheap flights from San Diego to Seattle from £77

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 23/10. Fares are subject to change and may not be available on all flights or dates of travel.
SAN — SEA
1 Nov — 8 Nov1
1 adult
1 adult, Economy

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 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 2 October 2025.

Round-trip from

£123

One-way from

£77

Popular in

July

Cheapest in

January

Average price

£146

Good one-way deal

£83 or less
Hawaiian Airlines
  • Hawaiian Airlines
  • 8/12-10/12
  • 2 total stops
  • 11h 58m total
  • San Diego to Seattle
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United Airlines
  • United Airlines
  • 23/10
  • 2 total stops
  • 10h 07m total
  • San Diego to Seattle
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Highest demand for flights based on searches. 10% potential increase in price (£16 potential increase over avg. return price).
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Cheapest flight prices on average. 1% potential price decrease (£3 potential savings vs. average return price).
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Average for round-trip flights in October 2025
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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

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 2 October 2025.

Mon 8/1208:01SAN - SEA
1 stop5h 34mHawaiian Airlines
Wed 10/1213:40SEA - SAN
1 stop6h 24mHawaiian Airlines
Deal found 1/10£123
Tue 9/1212:55SAN - SEA
1 stop5h 11mHawaiian Airlines
Wed 10/1207:55SEA - SAN
1 stop6h 04mHawaiian Airlines
Deal found 1/10£124
Sat 15/1106:15SAN - SEA
Nonstop3h 20mDelta
Sat 22/1119:55SEA - SAN
Nonstop2h 52mDelta
Deal found 2/10£125
Wed 22/1012:40SAN - SEA
1 stop7h 10mSouthwest
Wed 29/1013:20SEA - SAN
1 stop4h 20mSouthwest
Deal found 1/10£128
Thu 13/1118:45SAN - SEA
1 stop4h 25mSouthwest
Thu 20/1105:15SEA - SAN
1 stop6h 30mSouthwest
Deal found 2/10£129
Tue 21/1014:30SAN - SEA
Nonstop3h 04mAlaska Airlines
Sat 25/1020:10SEA - SAN
Nonstop2h 55mAlaska Airlines
Deal found 30/9£131
Thu 30/1006:15SAN - SEA
Nonstop3h 10mAlaska Airlines
Sat 1/1120:07SEA - SAN
Nonstop2h 52mAlaska Airlines
Deal found 2/10£132
Thu 11/1215:15SAN - SEA
1 stop7h 40mSouthwest
Sun 14/1209:10SEA - SAN
1 stop6h 35mSouthwest
Deal found 1/10£133
Thu 13/1110:00SAN - SEA
1 stop4h 30mSouthwest
Sat 15/1110:15SEA - SAN
2 stops7h 35mSouthwest
Deal found 2/10£134
Tue 9/1212:55SAN - SEA
1 stop5h 11mHawaiian Airlines
Fri 12/1216:47SEA - SAN
Nonstop2h 46mHawaiian Airlines
Deal found 1/10£135
Mon 8/1208:01SAN - SEA
1 stop5h 34mAlaska Airlines
Thu 11/1207:55SEA - SAN
1 stop6h 04mAlaska Airlines
Deal found 2/10£136

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 2 October 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 29/10

16:30-20:45

1 stop4h 15m

Seattle/Tacoma Intl

Wed 5/11

08:10-15:20

2 stops7h 10m

£132

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Wed 17/12

16:10-20:40

1 stop4h 30m

Seattle/Tacoma Intl

Thu 25/12

09:25-16:55

1 stop7h 30m

£135

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Mon 8/12

08:01-13:35

1 stop5h 34m

Seattle/Tacoma Intl

Thu 11/12

07:55-13:59

1 stop6h 04m

£136

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Sat 6/12

15:25-20:15

1 stop4h 50m

Seattle/Tacoma Intl

Tue 9/12

05:40-12:40

1 stop7h 00m

£139

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Fri 27/2

14:15-18:50

1 stop4h 35m

Seattle/Tacoma Intl

Mon 2/3

06:05-12:00

1 stop5h 55m

£140

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Mon 2/2

12:47-17:54

1 stop5h 07m

Seattle/Tacoma Intl

Fri 6/2

16:30-19:16

Nonstop2h 46m

£142

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Tue 16/12

10:20-18:40

2 stops8h 20m

Seattle/Tacoma Intl

Thu 18/12

07:10-11:25

1 stop4h 15m

£143

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Mon 12/1

08:01-20:20

1 stop12h 19m

Seattle/Tacoma Intl

Fri 16/1

22:02-08:33

1 stop10h 31m

£143

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Sun 9/11

06:15-09:35

Nonstop3h 20m

Seattle/Tacoma Intl

Mon 17/11

07:10-10:06

Nonstop2h 56m

£146

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Thu 18/12

11:05-14:22

Nonstop3h 17m

Seattle/Tacoma Intl

Fri 2/1

07:15-10:11

Nonstop2h 56m

£146

Flights are sorted by cheapest return flights first.

Deals found on 30/9

Showing 1-10 of 22 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 26 September 2025.

Booking 58 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 2 October 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 morning tend to be the most expensive. A flight at midday could potentially save you up to 65% 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, 4 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 £132, Southwest can have you in Seattle from San Diego in 4h 15m. 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 KLM (88%), Air France (88%) and Delta (87%).

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

    While on average a flight from San Diego to Seattle is generally £88, our data shows the cheapest flight currently is £78. When looking at the most popular route, (San Diego - Seattle/Tacoma Intl), you can expect to pay £150 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, 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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Alternative routes for San Diego to Seattle

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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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