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Cheap flights from San Diego to Seattle from C$ 147

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 6/11. Fares are subject to change and may not be available on all flights or dates of travel.
SAN — SEA
22 Aug — 29 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 Saturday

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 23 July 2026.

Tue 18/86:00 p.m.
SAN
-
SEA
Nonstop3h 00m
Southwest
Tue 25/811:40 a.m.
SEA
-
SAN
1 stop5h 15m
Southwest
Deal found 21/7C$ 235
Sat 7/116:50 a.m.
SAN
-
SEA
2 stops9h 15m
Southwest
Mon 9/117:30 a.m.
SEA
-
SAN
1 stop4h 20m
Southwest
Deal found 20/7C$ 237
Thu 13/86:18 a.m.
SAN
-
SEA
Nonstop3h 01m
Alaska Airlines
Sat 22/88:49 p.m.
SEA
-
SAN
Nonstop2h 55m
Alaska Airlines
Deal found 21/7C$ 240
Fri 16/101:50 p.m.
SAN
-
SEA
Nonstop3h 10m
Delta
Sat 7/117:15 a.m.
SEA
-
SAN
Nonstop2h 52m
Delta
Deal found 22/7C$ 242
Tue 13/104:15 p.m.
SAN
-
SEA
2 stops5h 35m
Southwest
Mon 9/117:30 a.m.
SEA
-
SAN
1 stop4h 20m
Southwest
Deal found 22/7C$ 244
Thu 27/86:15 a.m.
SAN
-
SEA
Nonstop3h 05m
Alaska Airlines
Sun 30/87:40 a.m.
SEA
-
SAN
Nonstop2h 59m
Alaska Airlines
Deal found 23/7C$ 247
Sun 6/910:45 a.m.
SAN
-
SEA
1 stop7h 48m
Alaska Airlines
Sun 6/98:49 p.m.
SEA
-
SAN
Nonstop2h 55m
Alaska Airlines
Deal found 22/7C$ 248
Fri 21/87:02 p.m.
SAN
-
SEA
Nonstop3h 03m
Delta
Mon 24/87:15 a.m.
SEA
-
SAN
Nonstop2h 56m
Delta
Deal found 23/7C$ 249
Mon 14/94:50 p.m.
SAN
-
SEA
1 stop6h 05m
Southwest
Fri 18/99:10 a.m.
SEA
-
SAN
Nonstop2h 45m
Southwest
Deal found 21/7C$ 251
Tue 1/912:40 p.m.
SAN
-
SEA
1 stop9h 20m
Alaska Airlines
Wed 9/94:59 p.m.
SEA
-
SAN
Nonstop2h 55m
Alaska Airlines
Deal found 22/7C$ 254
Wed 21/107:27 p.m.
SAN
-
SEA
Nonstop3h 06m
Alaska Airlines
Wed 28/109:59 a.m.
SEA
-
SAN
1 stop8h 30m
Alaska Airlines
Deal found 22/7C$ 255
Tue 18/812:20 p.m.
SAN
-
SEA
2 stops7h 55m
Southwest
Mon 24/85:00 a.m.
SEA
-
SAN
1 stop4h 30m
Southwest
Deal found 22/7C$ 256

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 23 July 2026.

Round-trip from

C$ 235

One-way from

C$ 147

Popular in

July

Cheapest in

February

Average price

C$ 457
Southwest
  • Southwest
  • 18/8-24/8
  • 1 total stop
  • 7h 35m total
  • San Diego to Seattle
Search Deals
Southwest
  • Southwest
  • 6/11
  • 1 total stop
  • 5h 35m total
  • San Diego to Seattle
Search Deals
Highest demand for flights based on searches. 15% potential increase in price (C$ 88 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (C$ 13 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 2026
Search Deals

Cheapflights Fare Finder

 
Customize 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 629,999 searches. Data last updated 23 July 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 round-trip

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Fri 16/10

8:28 p.m.-11:37 p.m.

Nonstop3h 09m

Seattle/Tacoma Intl

Mon 19/10

11:30 a.m.-2:40 p.m.

Nonstop3h 10m

C$ 242

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Fri 6/11

6:15 a.m.-9:28 a.m.

Nonstop3h 13m

Seattle/Tacoma Intl

Mon 9/11

8:42 p.m.-11:31 p.m.

Nonstop2h 49m

C$ 249

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Fri 4/9

8:33 p.m.-11:40 p.m.

Nonstop3h 07m

Seattle/Tacoma Intl

Sat 12/9

11:32 a.m.-2:42 p.m.

Nonstop3h 10m

C$ 275
Quickest round-trip

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Sun 23/8

7:03 a.m.-10:05 a.m.

Nonstop3h 02m

Seattle/Tacoma Intl

Mon 31/8

7:55 p.m.-10:49 p.m.

Nonstop2h 54m

C$ 285

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Wed 12/8

7:18 a.m.-10:26 a.m.

Nonstop3h 08m

Seattle/Tacoma Intl

Tue 18/8

11:55 a.m.-7:21 p.m.

1 stop7h 26m

C$ 296

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Fri 14/8

6:35 p.m.-9:35 p.m.

Nonstop3h 00m

Seattle/Tacoma Intl

Tue 18/8

7:06 p.m.-10:07 p.m.

Nonstop3h 01m

C$ 311

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Sat 5/9

5:10 p.m.-10:55 p.m.

1 stop5h 45m

Seattle/Tacoma Intl

Sun 6/9

9:35 a.m.-2:00 p.m.

1 stop4h 25m

C$ 327

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Sat 3/10

5:15 p.m.-10:20 p.m.

1 stop5h 05m

Seattle/Tacoma Intl

Sun 4/10

5:00 a.m.-9:35 a.m.

1 stop4h 35m

C$ 327

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Fri 28/8

2:25 p.m.-9:15 p.m.

2 stops6h 50m

Seattle/Tacoma Intl

Mon 31/8

5:00 a.m.-11:05 a.m.

1 stop6h 05m

C$ 327

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Mon 5/10

5:31 p.m.-10:29 a.m.

1 stop16h 58m

Seattle/Tacoma Intl

Thu 8/10

8:18 a.m.-7:00 p.m.

1 stop10h 42m

C$ 328

Flights are sorted by cheapest round-trip flights first.

Deals found on 23/7

Showing 1-10 of 24 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 round-trip 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?

The price you pay for your flight from San Diego to Seattle may vary depending on when you book. For the best chance of a lower fare, look to book 85 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

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 C$ 278). Flying from San Diego to Seattle in July is currently the most expensive (average of C$ 457). 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 23 July 2026.

A simple way to save on the total cost of your ticket is to fly from San Diego to Seattle in the afternoon. If you’re flexible enough to do this you can expect to save up to 71% on your trip compared to booking a flight at noon.

How much does it cost to fly round-trip from San Diego to Seattle?

Airfare is below average for this route at the moment.

San Diego to Seattle flights typically cost between C$ 333 and C$ 534 in August.
The cheapest round-trip price found within the last 5 days was C$ 235 on Southwest (18 Aug-24 Aug).

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?

    Flights from San Diego to Seattle/Tacoma Intl have been viewed 1 times in the past calendar month.

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

    Alaska Airlines and Delta can get you from San Diego to Seattle in just under 3h 02m. Your travel time will be generally consistent. San Diego and Seattle are separated by a distance of 1691 km. All flights are typically direct.

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

    Consider WestJet (94%), Scandinavian Airlines (91%) or Virgin Atlantic (89%) when booking your flight. These represent the most reliable airlines when flying from San Diego to Seattle.

  • 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 vacation 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 C$ 278). Flying from San Diego to Seattle in July is currently the most expensive (average of C$ 457). 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
SeaTac
Kent
Leavenworth
Mukilteo
Tacoma
Renton
Cashmere
Lynnwood
Ellensburg
Tukwila
Olympia
Marysville
Federal Way
Kirkland

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Certainly. Search results for flights to Seattle from San Diego shown to you on Cheapflights can be narrowed down with different useful search filters, which includes flexible booking options.

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