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Cheap flights from San Diego to Seattle from C$ 150

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 1/2. Fares are subject to change and may not be available on all flights or dates of travel.
SAN — SEA
11 Oct — 18 Oct1
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 Monday or Tuesday and return on a Tuesday

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 11 September 2025.

Round-trip from

C$ 213

One-way from

C$ 150

Popular in

July

Cheapest in

January

Average price

C$ 273

Good one-way deal

C$ 146 or less
Southwest
  • Southwest
  • 17/10-21/10
  • 2 total stops
  • 11h 10m total
  • San Diego to Seattle
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Alaska Airlines
  • Alaska Airlines
  • 1/2
  • 1 total stop
  • 4h 38m total
  • San Diego to Seattle
Search Deals
Highest demand for flights based on searches. 13% potential increase in price (C$ 68 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease (C$ 11 potential savings vs. average RT price).
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Average for round-trip flights in September 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

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 11 September 2025.

Thu 30/1011:05 a.m.SAN - SEA
1 stop6h 55mSouthwest
Sat 8/1110:15 a.m.SEA - SAN
2 stops7h 35mSouthwest
Deal found 10/9C$ 219
Sat 6/129:40 a.m.SAN - SEA
1 stop7h 10mSouthwest
Mon 8/128:10 a.m.SEA - SAN
1 stop5h 40mSouthwest
Deal found 9/9C$ 220
Fri 17/107:35 p.m.SAN - SEA
1 stop5h 15mSouthwest
Sat 18/106:35 a.m.SEA - SAN
1 stop4h 45mSouthwest
Deal found 9/9C$ 223
Thu 4/124:10 p.m.SAN - SEA
1 stop4h 30mSouthwest
Mon 15/128:10 a.m.SEA - SAN
1 stop4h 15mSouthwest
Deal found 11/9C$ 224
Tue 7/108:00 a.m.SAN - SEA
Nonstop3h 12mAlaska Airlines
Tue 7/101:21 p.m.SEA - SAN
1 stop7h 28mAlaska Airlines
Deal found 11/9C$ 227
Wed 15/103:35 p.m.SAN - SEA
2 stops6h 25mSouthwest
Wed 22/109:15 a.m.SEA - SAN
1 stop5h 35mSouthwest
Deal found 11/9C$ 229
Thu 9/105:50 p.m.SAN - SEA
1 stop7h 00mSouthwest
Mon 13/106:15 a.m.SEA - SAN
1 stop4h 15mSouthwest
Deal found 10/9C$ 231
Tue 7/103:00 p.m.SAN - SEA
1 stop7h 00mSouthwest
Thu 9/103:35 p.m.SEA - SAN
1 stop6h 20mSouthwest
Deal found 11/9C$ 236
Tue 11/111:30 p.m.SAN - SEA
1 stop9h 25mSouthwest
Sat 15/1112:10 p.m.SEA - SAN
2 stops7h 05mSouthwest
Deal found 11/9C$ 243
Sat 25/106:15 a.m.SAN - SEA
Nonstop3h 10mDelta
Sat 1/1111:25 a.m.SEA - SAN
Nonstop2h 46mDelta
Deal found 11/9C$ 245
Thu 4/124:10 p.m.SAN - SEA
1 stop4h 30mSouthwest
Sun 7/125:15 a.m.SEA - SAN
1 stop7h 05mSouthwest
Deal found 11/9C$ 248

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 11 September 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

Fri 17/10

7:35 p.m.-12:50 a.m.

1 stop5h 15m

Seattle/Tacoma Intl

Sat 18/10

6:35 a.m.-11:20 a.m.

1 stop4h 45m

C$ 223

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Wed 15/10

8:00 a.m.-11:12 a.m.

Nonstop3h 12m

Seattle/Tacoma Intl

Wed 22/10

7:00 a.m.-12:16 p.m.

1 stop5h 16m

C$ 236

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Sat 4/10

6:25 p.m.-9:32 p.m.

Nonstop3h 07m

Seattle/Tacoma Intl

Wed 8/10

7:15 p.m.-10:13 p.m.

Nonstop2h 58m

C$ 245

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Tue 30/9

7:15 p.m.-10:25 p.m.

Nonstop3h 10m

Seattle/Tacoma Intl

Sat 4/10

10:00 a.m.-12:57 p.m.

Nonstop2h 57m

C$ 245

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Wed 18/2

6:55 p.m.-10:06 p.m.

Nonstop3h 11m

Seattle/Tacoma Intl

Wed 25/2

3:15 p.m.-6:00 p.m.

Nonstop2h 45m

C$ 245

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Sat 11/10

7:03 p.m.-10:15 p.m.

Nonstop3h 12m

Seattle/Tacoma Intl

Sat 18/10

9:45 a.m.-12:38 p.m.

Nonstop2h 53m

C$ 245

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Sat 25/10

6:15 a.m.-9:25 a.m.

Nonstop3h 10m

Seattle/Tacoma Intl

Sat 1/11

7:55 p.m.-10:41 p.m.

Nonstop2h 46m

C$ 245

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Fri 10/10

7:10 p.m.-12:05 a.m.

1 stop4h 55m

Seattle/Tacoma Intl

Sat 11/10

7:05 a.m.-3:45 p.m.

1 stop8h 40m

C$ 254

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Tue 11/11

1:30 p.m.-10:55 p.m.

1 stop9h 25m

Seattle/Tacoma Intl

Mon 17/11

5:15 a.m.-11:50 a.m.

2 stops6h 35m

C$ 256

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Thu 2/10

7:15 p.m.-10:25 p.m.

Nonstop3h 10m

Seattle/Tacoma Intl

Tue 7/10

11:25 a.m.-2:11 p.m.

Nonstop2h 46m

C$ 259

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/9

Showing 1-10 of 23 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 29 August 2025.

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 58 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, January is the cheapest month in which you can book a flight from San Diego to Seattle (average of C$ 262). Flying from San Diego to Seattle in December is currently the most expensive (average of C$ 353). 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 11 September 2025.

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 22% on your trip compared to booking a flight at noon.

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 5 times in the past calendar month.

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

    Southwest and Hawaiian Airlines can get you from San Diego to Seattle in just under 3h 12m. Your travel time can differ by up to 2h 03m. 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 (92%), KLM (90%) or WestJet (85%) 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$ 137. While the most popular route (San Diego - Seattle/Tacoma Intl) can be booked for C$ 269 on average, our data indicates C$ 228 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, January is the cheapest month in which you can book a flight from San Diego to Seattle (average of C$ 262). Flying from San Diego to Seattle in December is currently the most expensive (average of C$ 353). 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
Tukwila
Tacoma
Bothell
Cashmere
Renton
Olympia
Marysville
Lynnwood

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