Find flights
Deals
When to book
FAQs

Cheap flights from San Diego to Seattle from C$ 149

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 29/6. Fares are subject to change and may not be available on all flights or dates of travel.
SAN — SEA
7 Jul — 14 Jul1
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 72 days in advance, depart on a Tuesday or Monday 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 7 June 2026.

Sat 22/84:40 p.m.
SAN
-
SEA
Nonstop2h 55m
Southwest
Wed 2/95:55 a.m.
SEA
-
SAN
2 stops5h 50m
Southwest
Deal found 2/6C$ 244
Mon 10/81:15 p.m.
SAN
-
SEA
1 stop5h 30m
Southwest
Wed 12/81:45 p.m.
SEA
-
SAN
1 stop7h 10m
Southwest
Deal found 2/6C$ 251
Wed 22/77:00 p.m.
SAN
-
SEA
Nonstop3h 03m
Delta
Tue 11/87:55 p.m.
SEA
-
SAN
Nonstop2h 54m
Delta
Deal found 5/6C$ 252
Tue 8/94:10 p.m.
SAN
-
SEA
2 stops5h 35m
Southwest
Tue 15/99:25 a.m.
SEA
-
SAN
1 stop6h 30m
Southwest
Deal found 2/6C$ 254
Thu 20/86:28 p.m.
SAN
-
SEA
1 stop4h 58m
United Airlines
Tue 25/89:00 a.m.
SEA
-
SAN
1 stop6h 54m
United Airlines
Deal found 3/6C$ 255
Tue 30/64:03 p.m.
SAN
-
SEA
Nonstop3h 02m
Delta
Tue 7/77:40 p.m.
SEA
-
SAN
Nonstop2h 54m
Delta
Deal found 2/6C$ 258
Fri 30/107:41 p.m.
SAN
-
SEA
1 stop4h 52m
United Airlines
Sun 1/115:07 a.m.
SEA
-
SAN
1 stop6h 01m
United Airlines
Deal found 4/6C$ 259
Tue 4/84:10 p.m.
SAN
-
SEA
2 stops5h 35m
Southwest
Tue 11/85:55 a.m.
SEA
-
SAN
2 stops5h 50m
Southwest
Deal found 4/6C$ 261
Sat 17/102:24 p.m.
SAN
-
SEA
2 stops6h 37m
United Airlines
Tue 20/1010:55 a.m.
SEA
-
SAN
1 stop4h 59m
United Airlines
Deal found 5/6C$ 262
Mon 29/67:41 p.m.
SAN
-
SEA
1 stop5h 34m
United Airlines
Fri 3/75:20 p.m.
SEA
-
SAN
1 stop5h 29m
United Airlines
Deal found 3/6C$ 263
Sat 8/86:18 a.m.
SAN
-
SEA
Nonstop3h 01m
Alaska Airlines
Tue 11/86:21 a.m.
SEA
-
SAN
Nonstop2h 49m
Alaska Airlines
Deal found 2/6C$ 265
Tue 28/75:20 p.m.
SAN
-
SEA
1 stop6h 15m
Southwest
Tue 4/89:25 a.m.
SEA
-
SAN
1 stop6h 30m
Southwest
Deal found 5/6C$ 266

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 7 June 2026.

Round-trip from

C$ 244

One-way from

C$ 149

Popular in

July

Cheapest in

February

Average price

C$ 407

Good one-way deal

C$ 335 or less
Southwest
  • Southwest
  • 22/8-2/9
  • 2 total stops
  • 8h 45m total
  • San Diego to Seattle
Search Deals
United Airlines
  • United Airlines
  • 27/6
  • 1 total stop
  • 6h 46m total
  • San Diego to Seattle
Search Deals
Highest demand for flights based on searches. 11% potential increase in price (C$ 60 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease (C$ 10 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in June 2026
Search Deals
Price to beat on a one-way flight from San Diego to Seattle/Tacoma Intl.
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 7 June 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

Tue 22/9

3:50 p.m.-6:52 p.m.

Nonstop3h 02m

Seattle/Tacoma Intl

Sun 27/9

4:59 p.m.-7:54 p.m.

Nonstop2h 55m

C$ 290

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Mon 24/8

6:15 a.m.-9:20 a.m.

Nonstop3h 05m

Seattle/Tacoma Intl

Sun 30/8

8:51 p.m.-11:46 p.m.

Nonstop2h 55m

C$ 293

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Fri 18/9

6:15 a.m.-9:20 a.m.

Nonstop3h 05m

Seattle/Tacoma Intl

Tue 29/9

8:35 p.m.-8:35 a.m.

1 stop12h 00m

C$ 298

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Sat 31/10

7:25 p.m.-10:34 p.m.

Nonstop3h 09m

Seattle/Tacoma Intl

Tue 3/11

8:31 a.m.-12:45 p.m.

1 stop4h 14m

C$ 298

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Mon 3/8

12:55 p.m.-8:10 p.m.

1 stop7h 15m

Seattle/Tacoma Intl

Fri 14/8

5:50 p.m.-8:45 p.m.

Nonstop2h 55m

C$ 314
Quickest round-trip

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Sat 4/7

6:18 a.m.-9:19 a.m.

Nonstop3h 01m

Seattle/Tacoma Intl

Sat 11/7

6:21 a.m.-9:10 a.m.

Nonstop2h 49m

C$ 330

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Mon 10/8

4:50 p.m.-10:55 p.m.

1 stop6h 05m

Seattle/Tacoma Intl

Mon 17/8

9:10 a.m.-11:55 a.m.

Nonstop2h 45m

C$ 339

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Mon 20/7

7:50 p.m.-1:45 a.m.

1 stop5h 55m

Seattle/Tacoma Intl

Wed 22/7

6:30 a.m.-2:00 p.m.

1 stop7h 30m

C$ 343

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Fri 18/9

4:40 p.m.-7:35 p.m.

Nonstop2h 55m

Seattle/Tacoma Intl

Sun 20/9

5:20 a.m.-11:15 a.m.

1 stop5h 55m

C$ 348

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

12:21 p.m.-4:56 p.m.

1 stop4h 35m

C$ 353

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/6

Showing 1-10 of 24 resultsSorted by cheapest first
1
2
3

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 71 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$ 275). Flying from San Diego to Seattle in July is currently the most expensive (average of C$ 420). 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 7 June 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 72% on your trip compared to booking a flight in the evening.

How much does it cost to fly round-trip 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?

    Flights from San Diego to Seattle/Tacoma Intl have been viewed 2 times in the past calendar month.

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

    Alaska Airlines and Southwest can get you from San Diego to Seattle in just under 3h 02m. Your travel time can differ by up to 4h 13m. San Diego and Seattle are separated by a distance of 1691 km. This flight may include one or multiple stops.

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

    Consider Scandinavian Airlines (100%), Air France (94%) or WestJet (93%) when booking your flight. These represent the most reliable airlines when flying from San Diego to Seattle.

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

    Looking at all options, your cheapest flight can be booked for C$ 259. While the most popular route (San Diego - Seattle/Tacoma Intl) can be booked for C$ 360 on average, our data indicates C$ 339 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$ 275). Flying from San Diego to Seattle in July is currently the most expensive (average of C$ 420). 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
Tukwila
Olympia
Marysville
Kirkland

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travelers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from San Diego to Seattle?

Cheapflights helps you search for flights from San Diego to Seattle via 900+ travel sites so you don’t have to. After performing a flight search, users can also filter their flight selection by filtering for price, number of stops, airlines, and so on.

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.

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.

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.