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Cheap flights from San Diego to Seattle from C$ 124

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 18/3. Fares are subject to change and may not be available on all flights or dates of travel.
SAN — SEA
11 ene. — 18 ene.1
1 adult
1 adult, Economy, 0 bags

Cheapflights Tip: The best prices from San Diego to Seattle/Tacoma Intl are usually found in January or February, booked 69 days in advance, depart on a Monday or Tuesday 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 12 diciembre 2025.

mié. 24/129:30 a.m.SAN - SEA
1 stop22h 55mAlaska Airlines
dom. 11/17:28 p.m.SEA - SAN
1 stop11h 49mAlaska Airlines
Deal found 10/12C$ 370
mié. 31/127:55 p.m.SAN - SEA
1 stop5h 04mUnited Airlines
jue. 1/11:55 p.m.SEA - SAN
1 stop8h 37mUnited Airlines
Deal found 10/12C$ 375
mié. 31/121:28 p.m.SAN - SEA
1 stop18h 57mAlaska Airlines
lun. 5/14:40 p.m.SEA - SAN
Nonstop2h 50mAlaska Airlines
Deal found 11/12C$ 403
mar. 23/126:30 a.m.SAN - SEA
Nonstop3h 23mDelta
vie. 9/15:59 p.m.SEA - SAN
Nonstop2h 44mDelta
Deal found 9/12C$ 411
mié. 31/121:28 p.m.SAN - SEA
1 stop18h 57mAlaska Airlines
dom. 4/110:10 p.m.SEA - SAN
1 stop10h 29mAlaska Airlines
Deal found 10/12C$ 416
lun. 29/126:30 a.m.SAN - SEA
Nonstop3h 23mDelta
dom. 4/17:59 p.m.SEA - SAN
Nonstop2h 50mDelta
Deal found 10/12C$ 423
mié. 31/121:28 p.m.SAN - SEA
1 stop18h 57mAlaska Airlines
sáb. 3/16:28 a.m.SEA - SAN
Nonstop2h 57mAlaska Airlines
Deal found 10/12C$ 428
mié. 24/1211:12 a.m.SAN - SEA
2 stops9h 55mUnited Airlines
dom. 11/16:18 a.m.SEA - SAN
1 stop6h 31mUnited Airlines
Deal found 10/12C$ 432
jue. 25/129:30 a.m.SAN - SEA
1 stop8h 47mAlaska Airlines
jue. 1/13:37 p.m.SEA - SAN
1 stop7h 30mAlaska Airlines
Deal found 10/12C$ 463

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 12 diciembre 2025.

Round-trip from

C$ 171

One-way from

C$ 124

Popular in

December

Cheapest in

January

Average price

C$ 423

Good round-trip deal

C$ 176 or less

Good one-way deal

C$ 116 or less
Southwest
  • Southwest
  • 14/1-22/1
  • 3 total stops
  • 16h 15m total
  • San Diego to Seattle
Search Deals
United Airlines
  • United Airlines
  • 11/1
  • 1 total stop
  • 5h 21m total
  • San Diego to Seattle
Search Deals
Highest demand for flights based on searches. 3% potential increase in price (C$ 14 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (C$ 11 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
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Price to beat on a round-trip flight from San Diego to Seattle/Tacoma Intl.
Search Deals
Price to beat on a one-way flight from San Diego to Seattle/Tacoma Intl.
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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 12 diciembre 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

vie. 30/1

2:20 p.m.-10:30 p.m.

1 stop8h 10m

Seattle/Tacoma Intl

mar. 3/2

9:30 a.m.-3:55 p.m.

2 stops6h 25m

C$ 171

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

jue. 29/1

7:10 a.m.-3:40 p.m.

2 stops8h 30m

Seattle/Tacoma Intl

lun. 2/2

6:05 a.m.-4:45 p.m.

2 stops10h 40m

C$ 178

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

mié. 18/2

2:00 p.m.-6:35 p.m.

1 stop4h 35m

Seattle/Tacoma Intl

mié. 25/2

5:15 a.m.-6:35 p.m.

2 stops13h 20m

C$ 179

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

jue. 8/1

1:45 p.m.-4:57 p.m.

Nonstop3h 12m

Seattle/Tacoma Intl

vie. 9/1

7:10 a.m.-10:02 a.m.

Nonstop2h 52m

C$ 192

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

dom. 8/2

4:25 p.m.-7:41 p.m.

Nonstop3h 16m

Seattle/Tacoma Intl

mar. 10/2

3:21 p.m.-6:00 p.m.

Nonstop2h 39m

C$ 192

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

sáb. 24/1

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

Nonstop3h 12m

Seattle/Tacoma Intl

mar. 27/1

8:38 a.m.-7:33 p.m.

1 stop10h 55m

C$ 222

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

vie. 16/1

7:00 a.m.-10:15 a.m.

Nonstop3h 15m

Seattle/Tacoma Intl

lun. 19/1

7:10 a.m.-10:02 a.m.

Nonstop2h 52m

C$ 232

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

lun. 5/1

12:30 p.m.-5:20 p.m.

1 stop4h 50m

Seattle/Tacoma Intl

jue. 8/1

2:05 p.m.-9:50 p.m.

1 stop7h 45m

C$ 232

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

lun. 5/1

10:10 p.m.-8:54 a.m.

1 stop10h 44m

Seattle/Tacoma Intl

jue. 8/1

2:36 p.m.-5:20 p.m.

Nonstop2h 44m

C$ 236

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

mar. 13/1

12:41 p.m.-6:50 p.m.

1 stop6h 09m

Seattle/Tacoma Intl

mié. 21/1

6:10 p.m.-8:58 p.m.

Nonstop2h 48m

C$ 236

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/12

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 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 5 December 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 61 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$ 74). Flying from San Diego to Seattle in July is currently the most expensive (average of C$ 185). 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 12 diciembre 2025.

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?

    Southwest and Delta can get you from San Diego to Seattle in just under 3h 12m. Your travel time can differ by up to 4h 58m. 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 Air France (94%), Virgin Atlantic (91%) or Icelandair (88%) 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$ 116. While the most popular route (San Diego - Seattle/Tacoma Intl) can be booked for C$ 601 on average, our data indicates C$ 146 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$ 74). Flying from San Diego to Seattle in July is currently the most expensive (average of C$ 185). 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
Mukilteo
Tacoma
Bothell
Cashmere
Olympia
Renton
Marysville
Lynnwood

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