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Cheap flights from San Francisco to Seattle from £45

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from San Francisco to Seattle departing on 17/12. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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0 bags
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Cheap return flights

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Delta Logo
13:00 - 19:34SFO-SEA
6h 34m1 stop
Delta Logo
21:20 - 23:28SEA-SFO
2h 08mdirect
£95Delta
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Do, 8 Jan - Mo, 12 Jan
Delta Logo
16:03 - 22:24SFO-SEA
6h 21m1 stop
Delta Logo
11:25 - 13:38SEA-SFO
2h 13mdirect
£96Delta
Find Deal
Do, 8 Jan - Mo, 12 Jan
Delta Logo
13:20 - 18:29SFO-SEA
5h 09m1 stop
Delta Logo
21:20 - 23:28SEA-SFO
2h 08mdirect
£97Delta
Find Deal
Do, 8 Jan - Mo, 12 Jan
Alaska Airlines Logo
14:21 - 16:36SFO-SEA
2h 15mdirect
Alaska Airlines Logo
07:09 - 09:33SEA-SFO
2h 24mdirect
£100Alaska Airlines
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Di, 16 Dez - Do, 1 Jan
Alaska Airlines Logo
09:00 - 14:41SFO-SEA
5h 41m1 stop
Alaska Airlines Logo
15:52 - 18:07SEA-SFO
2h 15mdirect
£103Alaska Airlines
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Do, 19 Feb - Do, 19 Feb
Delta Logo
09:50 - 16:38SFO-SEA
6h 48m1 stop
Delta Logo
18:05 - 22:55SEA-SFO
4h 50m1 stop
£104Delta
Find Deal
Di, 6 Jan - Fr, 9 Jan
Alaska Airlines Logo
18:27 - 20:47SFO-SEA
2h 20mdirect
Alaska Airlines Logo
09:50 - 16:44SEA-SFO
6h 54m1 stop
£108Alaska Airlines
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Sa, 14 Feb - Di, 17 Feb
Alaska Airlines Logo
06:30 - 08:47SFO-SEA
2h 17mdirect
Alaska Airlines Logo
11:40 - 16:44SEA-SFO
5h 04m1 stop
£111Alaska Airlines
Find Deal
Do, 19 Feb - Do, 19 Feb
Alaska Airlines Logo
07:35 - 09:52SFO-SEA
2h 17mdirect
Alaska Airlines Logo
07:09 - 09:33SEA-SFO
2h 24mdirect
£111Alaska Airlines
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Mi, 17 Dez - Do, 1 Jan
Southwest Logo
05:30 - 12:20SFO-SEA
6h 50m1 stop
Southwest Logo
05:15 - 11:50SEA-SFO
6h 35m1 stop
£114Southwest
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Do, 8 Jan - Mo, 12 Jan

Alaska Airlines flights from San Francisco to Seattle

Our best Alaska Airlines deals on San Francisco to Seattle flight tickets
Alaska Airlines
16 Dec
SFO14:21San Francisco
2h 15m
SEA16:36Seattle/Tacoma Intl
1 Jan
SEA07:09Seattle/Tacoma Intl
2h 24m
SFO09:33San Francisco
£100
Find similar
Alaska Airlines
19 Feb
SFO09:00San Francisco
5h 41m
1 stop
SEA14:41Seattle/Tacoma Intl
19 Feb
SEA15:52Seattle/Tacoma Intl
2h 15m
SFO18:07San Francisco
£103
Find similar
Alaska Airlines
5 Jan
SFO16:42San Francisco
2h 17m
SEA18:59Seattle/Tacoma Intl
7 Jan
SEA12:50Seattle/Tacoma Intl
5h 53m
1 stop
SFO18:43San Francisco
£108
Find similar

Southwest flights from San Francisco to Seattle

Our best Southwest deals on San Francisco to Seattle flight tickets
Southwest
8 Jan
SFO15:00San Francisco
7h 35m
1 stop
SEA22:35Seattle/Tacoma Intl
11 Jan
SEA05:00Seattle/Tacoma Intl
6h 50m
1 stop
SFO11:50San Francisco
£114
Find similar
Southwest
8 Jan
SFO15:00San Francisco
7h 35m
1 stop
SEA22:35Seattle/Tacoma Intl
10 Jan
SEA06:25Seattle/Tacoma Intl
7h 10m
2 stops
SFO13:35San Francisco
£118
Find similar
Southwest
8 Jan
SFO14:10San Francisco
7h 40m
2 stops
SEA21:50Seattle/Tacoma Intl
12 Jan
SEA12:45Seattle/Tacoma Intl
8h 30m
2 stops
SFO21:15San Francisco
£122
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momondo Fare Finder

 
Customise your flight search to find flights from San Francisco 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, momondo users made 279,928 searches. Data last updated 27 November 2025.
Use the filters below to find and compare flights from San Francisco to Seattle that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

San FranciscoSeattle

SFO - SEA

SFOSEA

San Francisco

Do 8/1

13:00-19:34

1 stop6h 34m

Seattle/Tacoma Intl

Mo 12/1

21:20-23:28

Nonstop2h 08m

£95

San FranciscoSeattle

SFO - SEA

SFOSEA

San Francisco

Do 8/1

16:03-22:24

1 stop6h 21m

Seattle/Tacoma Intl

Mo 12/1

11:25-13:38

Nonstop2h 13m

£96

San FranciscoSeattle

SFO - SEA

SFOSEA

San Francisco

Do 8/1

13:20-18:29

1 stop5h 09m

Seattle/Tacoma Intl

Mo 12/1

21:20-23:28

Nonstop2h 08m

£97

San FranciscoSeattle

SFO - SEA

SFOSEA

San Francisco

Di 16/12

14:21-16:36

Nonstop2h 15m

Seattle/Tacoma Intl

Do 1/1

07:09-09:33

Nonstop2h 24m

£100

San FranciscoSeattle

SFO - SEA

SFOSEA

San Francisco

Do 19/2

09:00-14:41

1 stop5h 41m

Seattle/Tacoma Intl

Do 19/2

15:52-18:07

Nonstop2h 15m

£103

San FranciscoSeattle

SFO - SEA

SFOSEA

San Francisco

Di 6/1

09:50-16:38

1 stop6h 48m

Seattle/Tacoma Intl

Fr 9/1

18:05-22:55

1 stop4h 50m

£104

San FranciscoSeattle

SFO - SEA

SFOSEA

San Francisco

Sa 14/2

18:27-20:47

Nonstop2h 20m

Seattle/Tacoma Intl

Di 17/2

09:50-16:44

1 stop6h 54m

£108

San FranciscoSeattle

SFO - SEA

SFOSEA

San Francisco

Do 19/2

06:30-08:47

Nonstop2h 17m

Seattle/Tacoma Intl

Do 19/2

11:40-16:44

1 stop5h 04m

£111

San FranciscoSeattle

SFO - SEA

SFOSEA

San Francisco

Mi 17/12

07:35-09:52

Nonstop2h 17m

Seattle/Tacoma Intl

Do 1/1

07:09-09:33

Nonstop2h 24m

£111

San FranciscoSeattle

SFO - SEA

SFOSEA

San Francisco

Do 8/1

05:30-12:20

1 stop6h 50m

Seattle/Tacoma Intl

Mo 12/1

05:15-11:50

1 stop6h 35m

£114

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Seattle from

How to get the cheapest flight ticket from San Francisco to Seattle

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to Seattle?

The cheapest month to fly to Seattle from San Francisco is in January. Flight prices, which tend to average around £145, are often lower during this time because this is during the off-season. The month of February is another great option to travel to Seattle, with average flight prices from San Francisco averaging around £157.

What is the cheapest day to depart on your flight to Seattle?

According to our data, Friday is the cheapest day to fly to Seattle from San Francisco. The lowest ticket price found for a Friday departure recently was £157. Keep in mind that prices can always vary depending on your route and whether or not you are flying domestic or international. Be sure to avoid booking your departure on a Saturday as prices are generally higher than usual. According to our data, the average ticket price to Seattle on Saturday is £500.

What is the cheapest time of day to depart on your flight to Seattle?

According to our data, the cheapest time of day to fly to Seattle is in the afternoon. momondo users have found flights departing from San Francisco to Seattle in the afternoon for as low as £247. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. Flights in the morning are often more expensive, with an average ticket price of £384.

What is the cheapest San Francisco to Seattle/Tacoma Intl flight route?

Fly from San Francisco to Seattle/Tacoma Intl for the best San Francisco - Seattle/Tacoma Intl flight prices

How far in advance should I book a flight to Seattle?

You are more likely to see cheaper flights to Seattle from San Francisco when booking weeks ahead of your departure date. In general, you can expect to find flights to Seattle for around £186 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Seattle from San Francisco for as low as £111 on momondo.

What cabin class options are available on San Francisco to Seattle/Tacoma Intl flights?

There are 3 cabin classes available to choose from on San Francisco to Seattle/Tacoma Intl flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

How have San Francisco to Seattle flight prices changed over time?

As of November 2025, prices for San Francisco to Seattle flights are approximately 2% cheaper when compared to flights at the same time last year.

When to book flights from San Francisco to Seattle

Are you open to changing your travel dates? Check out the ideal times to fly from San Francisco to Seattle according to our flight data. Find out which month and days have the cheapest flights.
Estimated return price

Cheap San Francisco to Seattle (SFO to SEA) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from San Francisco to Seattle

Fastest flight time

2h 20m

Direct flights

Every day

Airports in Seattle

1 airport
The fastest flight from San Francisco to Seattle takes 2h 20m
Direct flights go from San Francisco to Seattle every day.
There is 1 airport near Seattle: Seattle/Tacoma Intl (SEA)
Search flight deals

  • How far is San Francisco to Seattle/Tacoma Intl by plane?

    The straight-line distance from San Francisco to Seattle/Tacoma Intl is 678.2 mi. Typically, this will take 2h 11m by plane in normal conditions.

  • When did momondo last update prices for flights from San Francisco Airport to Seattle/Tacoma Intl Airport?

    Prices for flights from San Francisco Airport to Seattle/Tacoma Intl Airport were last updated today.

  • How many operators does momondo search for flights from San Francisco Airport to Seattle/Tacoma Intl Airport?

  • How old do you have to be to fly from San Francisco Airport to Seattle/Tacoma Intl Airport?

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from San Francisco Airport to Seattle/Tacoma Intl Airport.

  • What documentation or ID do you need to fly to Seattle/Tacoma Intl Airport?

    The travel and health documents required for your trip to Seattle/Tacoma Intl Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Seattle/Tacoma Intl Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

  • What is the most popular plane model from San Francisco to Seattle?

  • What is the most popular airline from San Francisco to Seattle?

Best airlines flying from San Francisco to Seattle

Compare and see reviews for airlines that fly from San Francisco to Seattle with momondo
Airline
Rating
Free Cancellation
Price
Alaska AirlinesPriceFrom £119Free CancellationRating
8.0
11,363 reviews
Search Alaska Airlines flights

  • Alaska Airlines Flights From San Francisco to Seattle

    Alaska Airlines flies from San Francisco to Seattle around 19 times per week, with 11,363 momondo users rating the airline 8.0/10. The cheapest Alaska Airlines deal from San Francisco to Seattle in the last 72 hours was £119 (round-trip), much lower than the average airfare cost of £208 for Alaska Airlines flights on this route.

Travelling to a place near Seattle?

Book flights to Seattle if you plan to visit one of these locations
Fife
Renton
SeaTac

Why use momondo?

Why should I use momondo to find a flight deal from San Francisco to Seattle?

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Seattle from San Francisco.

Can I find flights from San Francisco to Seattle with flexible booking policies on momondo?

Yes. momondo enables you to select and highlight flights to Seattle from San Francisco with this policy.

How can momondo help me find flights from San Francisco to Seattle?

momondo helps you find the best flight between San Francisco and Seattle by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

I’m not ready to book a flight from San Francisco to Seattle right now. Can momondo alert me if prices change?

Price alerts on flights to Seattle from San Francisco are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

An easier way to manage your Seattle trip

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