Cheap flights from San Diego to Seattle from C$ 125
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 28/1. Fares are subject to change and may not be available on all flights or dates of travel.
Cheapflights Tip: The best prices from San Diego to Seattle/Tacoma Intl are usually found in January or February, booked 58 days in advance, depart on a Tuesday or Wednesday 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 27 October 2025.
Find flight deals from San Diego to Seattle
Cheapest flights from San Diego to SeattleExplore 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 27 October 2025.
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 27 October 2025.
Cheapflights Fare Finder
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
San DiegoSeattle
SAN - SEA
SANSEA
San Diego
Wed 18/2
1:35 p.m.-4:43 p.m.
Nonstop3h 08m
Seattle/Tacoma Intl
Wed 25/2
3:15 p.m.-6:00 p.m.
Nonstop2h 45m
San DiegoSeattle
SAN - SEA
SANSEA
San Diego
Tue 24/2
6:15 a.m.-9:27 a.m.
Nonstop3h 12m
Seattle/Tacoma Intl
Sat 28/2
1:49 p.m.-4:34 p.m.
Nonstop2h 45m
San DiegoSeattle
SAN - SEA
SANSEA
San Diego
Mon 8/12
9:37 p.m.-9:19 a.m.
1 stop11h 42m
Seattle/Tacoma Intl
Thu 11/12
9:39 p.m.-8:39 a.m.
1 stop11h 00m
San DiegoSeattle
SAN - SEA
SANSEA
San Diego
Sat 22/11
9:17 p.m.-8:13 a.m.
1 stop10h 56m
Seattle/Tacoma Intl
Fri 28/11
8:05 p.m.-6:30 a.m.
1 stop10h 25m
San DiegoSeattle
SAN - SEA
SANSEA
San Diego
Thu 8/1
12:40 p.m.-7:30 p.m.
1 stop6h 50m
Seattle/Tacoma Intl
Sun 11/1
2:01 p.m.-8:24 p.m.
1 stop6h 23m
San DiegoSeattle
SAN - SEA
SANSEA
San Diego
Thu 29/1
8:34 a.m.-3:32 p.m.
1 stop6h 58m
Seattle/Tacoma Intl
Mon 2/2
10:18 a.m.-4:02 p.m.
1 stop5h 44m
San DiegoSeattle
SAN - SEA
SANSEA
San Diego
Wed 18/2
1:55 p.m.-11:05 p.m.
1 stop9h 10m
Seattle/Tacoma Intl
Wed 25/2
9:25 p.m.-7:05 a.m.
1 stop9h 40m
San DiegoSeattle
SAN - SEA
SANSEA
San Diego
Fri 5/12
7:10 a.m.-3:39 p.m.
1 stop8h 29m
Seattle/Tacoma Intl
Mon 8/12
7:10 a.m.-4:12 p.m.
1 stop9h 02m
San DiegoSeattle
SAN - SEA
SANSEA
San Diego
Fri 12/12
9:37 p.m.-8:14 a.m.
1 stop10h 37m
Seattle/Tacoma Intl
Tue 16/12
8:31 p.m.-8:39 a.m.
1 stop12h 08m
San DiegoSeattle
SAN - SEA
SANSEA
San Diego
Fri 5/12
7:05 p.m.-10:23 p.m.
Nonstop3h 18m
Seattle/Tacoma Intl
Sat 6/12
7:10 a.m.-10:09 a.m.
Nonstop2h 59m
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.
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 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, February is the cheapest month in which you can book a flight from San Diego to Seattle (average of C$ 76). Flying from San Diego to Seattle in July is currently the most expensive (average of C$ 188). 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?
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.
How often are flights from San Diego to Seattle delayed?
About 12% of weekly flights between San Diego and Seattle have experienced delays in the past year, with the average delay time being 143 minutes.
What is the most punctual flight time for San Diego to Seattle flights?
Historically, flights departing at night are less likely to be delayed, whereas flights leaving in the evening tend to experience delays more often.
What day of the week experiences the fewest flight delays on this route?
Tuesday tends to have the lowest number of delays on this route, whereas Friday has historically faced a higher average of delays compared to other days of the week.
Which airline has the best punctuality record on San Diego to Seattle flights?
Over the past year, Aeromexico has had the lowest number of delays on this route, with no flights being classified as delayed.
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.
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Alternative routes for San Diego to Seattle
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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.