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Cheap flights from San Diego to Seattle from C$ 118

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 25/3. Fares are subject to change and may not be available on all flights or dates of travel.
SAN — SEA
25 Feb — 4 Mar1
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 October, booked 69 days in advance, depart on a Monday or Wednesday and return on a Tuesday

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 26 January 2026.

Mon 9/32:16 p.m.
SAN
-
SEA
1 stop18h 54m
Alaska Airlines
Tue 10/312:56 p.m.
SEA
-
SAN
Nonstop2h 50m
Alaska Airlines
Deal found 26/1C$ 215
Sat 14/37:00 a.m.
SAN
-
SEA
1 stop9h 57m
Alaska Airlines
Sat 14/38:55 p.m.
SEA
-
SAN
Nonstop2h 49m
Alaska Airlines
Deal found 26/1C$ 229
Sat 7/311:05 a.m.
SAN
-
SEA
Nonstop3h 05m
Southwest
Mon 9/32:40 p.m.
SEA
-
SAN
Nonstop2h 40m
Southwest
Deal found 26/1C$ 234
Mon 11/52:15 p.m.
SAN
-
SEA
Nonstop3h 05m
Southwest
Fri 15/511:05 a.m.
SEA
-
SAN
Nonstop2h 45m
Southwest
Deal found 24/1C$ 238
Thu 26/210:59 a.m.
SAN
-
SEA
Nonstop3h 16m
Delta
Wed 4/37:15 a.m.
SEA
-
SAN
Nonstop2h 49m
Delta
Deal found 26/1C$ 242
Tue 3/34:20 p.m.
SAN
-
SEA
1 stop6h 10m
Southwest
Sat 7/32:50 p.m.
SEA
-
SAN
Nonstop2h 40m
Southwest
Deal found 26/1C$ 248
Tue 24/28:59 p.m.
SAN
-
SEA
1 stop12h 54m
Alaska Airlines
Wed 25/29:22 p.m.
SEA
-
SAN
1 stop12h 29m
Alaska Airlines
Deal found 25/1C$ 251
Sun 8/38:50 a.m.
SAN
-
SEA
1 stop5h 15m
Southwest
Tue 10/32:35 p.m.
SEA
-
SAN
Nonstop2h 40m
Southwest
Deal found 26/1C$ 252
Sat 9/51:35 p.m.
SAN
-
SEA
1 stop7h 31m
United Airlines
Wed 13/512:34 p.m.
SEA
-
SAN
1 stop4h 50m
United Airlines
Deal found 26/1C$ 256
Fri 27/25:55 p.m.
SAN
-
SEA
1 stop5h 30m
Southwest
Mon 2/39:30 a.m.
SEA
-
SAN
1 stop4h 10m
Southwest
Deal found 25/1C$ 259
Wed 25/210:19 a.m.
SAN
-
SEA
1 stop4h 46m
Alaska Airlines
Tue 3/39:22 p.m.
SEA
-
SAN
1 stop9h 55m
Alaska Airlines
Deal found 25/1C$ 260

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 26 January 2026.

Round-trip from

C$ 215

One-way from

C$ 118

Popular in

July

Cheapest in

February

Average price

C$ 352
Alaska Airlines
  • Alaska Airlines
  • 9/3-10/3
  • 1 total stop
  • 21h 44m total
  • San Diego to Seattle
Search Deals
Southwest
  • Southwest
  • 21/4
  • Nonstop
  • 3h 00m total
  • San Diego to Seattle
Search Deals
Highest demand for flights based on searches. 7% potential increase in price (C$ 36 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease (C$ 9 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 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 26 January 2026.
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

Fri 15/5

1:35 p.m.-4:39 p.m.

Nonstop3h 04m

Seattle/Tacoma Intl

Sun 17/5

7:20 a.m.-10:11 a.m.

Nonstop2h 51m

C$ 242

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Tue 10/3

7:30 a.m.-10:38 a.m.

Nonstop3h 08m

Seattle/Tacoma Intl

Sun 15/3

7:35 p.m.-10:28 p.m.

Nonstop2h 53m

C$ 242

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Thu 14/5

6:55 p.m.-10:02 p.m.

Nonstop3h 07m

Seattle/Tacoma Intl

Sun 17/5

7:20 a.m.-10:11 a.m.

Nonstop2h 51m

C$ 242

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Sat 14/3

7:30 a.m.-10:38 a.m.

Nonstop3h 08m

Seattle/Tacoma Intl

Tue 17/3

11:51 a.m.-2:44 p.m.

Nonstop2h 53m

C$ 242

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Fri 6/3

10:59 a.m.-2:15 p.m.

Nonstop3h 16m

Seattle/Tacoma Intl

Mon 9/3

7:20 a.m.-10:16 a.m.

Nonstop2h 56m

C$ 242

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Thu 14/5

7:00 a.m.-10:10 a.m.

Nonstop3h 10m

Seattle/Tacoma Intl

Tue 19/5

7:59 p.m.-10:48 p.m.

Nonstop2h 49m

C$ 242

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Fri 6/3

1:40 p.m.-4:55 p.m.

Nonstop3h 15m

Seattle/Tacoma Intl

Sun 8/3

7:20 a.m.-10:16 a.m.

Nonstop2h 56m

C$ 242

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Fri 8/5

7:00 a.m.-10:10 a.m.

Nonstop3h 10m

Seattle/Tacoma Intl

Sun 10/5

7:59 p.m.-10:48 p.m.

Nonstop2h 49m

C$ 242

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Fri 6/3

6:45 p.m.-9:59 p.m.

Nonstop3h 14m

Seattle/Tacoma Intl

Mon 23/3

3:30 p.m.-6:20 p.m.

Nonstop2h 50m

C$ 242

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Tue 24/2

10:59 a.m.-2:15 p.m.

Nonstop3h 16m

Seattle/Tacoma Intl

Sat 28/2

1:45 p.m.-4:24 p.m.

Nonstop2h 39m

C$ 242

Flights are sorted by cheapest round-trip flights first.

Deals found on 26/1

Showing 1-10 of 24 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 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?

Use this chart to determine the optimal time to book a round-trip flight from San Diego to Seattle. Price data was last updated on 23 January 2026.

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 69 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$ 82). Flying from San Diego to Seattle in July is currently the most expensive (average of C$ 184). 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 26 January 2026.

A simple way to save on the total cost of your ticket is to fly from San Diego to Seattle at noon. If you’re flexible enough to do this you can expect to save up to 89% on your trip compared to booking a flight in the evening.

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 4 times in the past calendar month.

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

    Delta can get you from San Diego to Seattle in just under 3h 15m. 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 Air France (93%), American Airlines (87%) or Delta (87%) 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$ 82). Flying from San Diego to Seattle in July is currently the most expensive (average of C$ 184). 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
Leavenworth
SeaTac
Mukilteo
Tacoma
Kent
Tukwila
Bothell
Cashmere
Olympia
Renton
Lynnwood
Marysville
Kirkland

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Why should you use Cheapflights to find cheap flight tickets from San Diego to Seattle?

Cheapflights helps you find that perfect flight to Seattle from San Diego by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

Can Cheapflights find flights from San Diego to Seattle with no change fees?

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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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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