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Cheap flights from San Francisco to Seattle from £52

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 16/12. 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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United Airlines Logo
06:00 - 08:23SFO-SEA
2h 23mdirect
United Airlines Logo
07:05 - 09:29SEA-SFO
2h 24mdirect
£103United Airlines
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Tue, 30 Dec - Wed, 31 Dec
Delta Logo
08:25 - 14:44SFO-SEA
6h 19m1 stop
Delta Logo
07:10 - 14:36SEA-SFO
7h 26m1 stop
£104Delta
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Sat, 6 Dec - Mon, 8 Dec
Alaska Airlines Logo
17:42 - 19:57SFO-SEA
2h 15mdirect
Alaska Airlines Logo
23:20 - 21:55SEA-SFO
22h 35m1 stop
£106Alaska Airlines
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Mon, 5 Jan - Mon, 5 Jan
Alaska Airlines Logo
19:28 - 21:48SFO-SEA
2h 20mdirect
Alaska Airlines Logo
20:41 - 22:56SEA-SFO
2h 15mdirect
£108Alaska Airlines
Find Deal
Mon, 16 Feb - Thu, 26 Feb
Alaska Airlines Logo
20:47 - 23:07SFO-SEA
2h 20mdirect
Alaska Airlines Logo
20:20 - 08:46SEA-SFO
12h 26m1 stop
£114Alaska Airlines
Find Deal
Sat, 14 Feb - Tue, 17 Feb
Southwest Logo
14:35 - 22:30SFO-SEA
7h 55m1 stop
Southwest Logo
05:35 - 14:05SEA-SFO
8h 30m1 stop
£115Southwest
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Thu, 11 Dec - Sun, 14 Dec
Alaska Airlines Logo
09:00 - 11:24SFO-SEA
2h 24mdirect
Alaska Airlines Logo
16:00 - 21:36SEA-SFO
5h 36m1 stop
£115Alaska Airlines
Find Deal
Fri, 12 Dec - Fri, 19 Dec
Southwest Logo
05:05 - 12:05SFO-SEA
7h 00m1 stop
Southwest Logo
07:05 - 14:25SEA-SFO
7h 20m2 stops
£119Southwest
Find Deal
Mon, 8 Dec - Tue, 9 Dec
United Airlines Logo
21:00 - 23:15SFO-SEA
2h 15mdirect
United Airlines Logo
05:00 - 07:36SEA-SFO
2h 36mdirect
£119United Airlines
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Thu, 11 Dec - Sun, 4 Jan
Frontier Logo
06:00 - 10:06SFO-SEA
28h 06m1 stop
Frontier Logo
12:48 - 07:53SEA-SFO
19h 05m1 stop
£121Frontier
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Thu, 11 Dec - Sun, 14 Dec

Alaska Airlines flights from San Francisco to Seattle

Our best Alaska Airlines deals on San Francisco to Seattle flight tickets
Alaska Airlines
11 Dec
SFO07:35San Francisco
2h 17m
SEA09:52Seattle/Tacoma Intl
15 Dec
SEA21:23Seattle/Tacoma Intl
16h 13m
1 stop
SFO13:36San Francisco
£106
Find similar
Alaska Airlines
16 Feb
SFO19:28San Francisco
2h 20m
SEA21:48Seattle/Tacoma Intl
24 Feb
SEA19:41Seattle/Tacoma Intl
2h 14m
SFO21:55San Francisco
£108
Find similar
Alaska Airlines
11 Mar
SFO08:42San Francisco
2h 21m
SEA11:03Seattle/Tacoma Intl
22 Apr
SEA15:50Seattle/Tacoma Intl
2h 11m
SFO18:01San Francisco
£112
Find similar

United Airlines flights from San Francisco to Seattle

Our best United Airlines deals on San Francisco to Seattle flight tickets
United Airlines
30 Dec
SFO06:00San Francisco
2h 23m
SEA08:23Seattle/Tacoma Intl
31 Dec
SEA07:05Seattle/Tacoma Intl
2h 24m
SFO09:29San Francisco
£103
Find similar
United Airlines
25 Dec
SFO16:30San Francisco
2h 15m
SEA18:45Seattle/Tacoma Intl
1 Jan
SEA07:05Seattle/Tacoma Intl
2h 24m
SFO09:29San Francisco
£124
Find similar
United Airlines
28 Dec
SFO22:48San Francisco
2h 11m
SEA00:59Seattle/Tacoma Intl
31 Dec
SEA05:00Seattle/Tacoma Intl
2h 36m
SFO07:36San Francisco
£129
Find similar

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 18 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

Tue 30/12

06:00-08:23

Nonstop2h 23m

Seattle/Tacoma Intl

Wed 31/12

07:05-09:29

Nonstop2h 24m

£103

San FranciscoSeattle

SFO - SEA

SFOSEA

San Francisco

Sat 6/12

08:25-14:44

1 stop6h 19m

Seattle/Tacoma Intl

Mon 8/12

07:10-14:36

1 stop7h 26m

£104

San FranciscoSeattle

SFO - SEA

SFOSEA

San Francisco

Mon 5/1

17:42-19:57

Nonstop2h 15m

Seattle/Tacoma Intl

Mon 5/1

23:20-21:55

1 stop22h 35m

£106

San FranciscoSeattle

SFO - SEA

SFOSEA

San Francisco

Mon 16/2

19:28-21:48

Nonstop2h 20m

Seattle/Tacoma Intl

Thu 26/2

20:41-22:56

Nonstop2h 15m

£108

San FranciscoSeattle

SFO - SEA

SFOSEA

San Francisco

Sat 14/2

20:47-23:07

Nonstop2h 20m

Seattle/Tacoma Intl

Tue 17/2

20:20-08:46

1 stop12h 26m

£114

San FranciscoSeattle

SFO - SEA

SFOSEA

San Francisco

Thu 11/12

14:35-22:30

1 stop7h 55m

Seattle/Tacoma Intl

Sun 14/12

05:35-14:05

1 stop8h 30m

£115

San FranciscoSeattle

SFO - SEA

SFOSEA

San Francisco

Fri 12/12

09:00-11:24

Nonstop2h 24m

Seattle/Tacoma Intl

Fri 19/12

16:00-21:36

1 stop5h 36m

£115

San FranciscoSeattle

SFO - SEA

SFOSEA

San Francisco

Mon 8/12

05:05-12:05

1 stop7h 00m

Seattle/Tacoma Intl

Tue 9/12

07:05-14:25

2 stops7h 20m

£119

San FranciscoSeattle

SFO - SEA

SFOSEA

San Francisco

Thu 11/12

21:00-23:15

Nonstop2h 15m

Seattle/Tacoma Intl

Sun 4/1

05:00-07:36

Nonstop2h 36m

£119

San FranciscoSeattle

SFO - SEA

SFOSEA

San Francisco

Thu 11/12

06:00-10:06

1 stop28h 06m

Seattle/Tacoma Intl

Sun 14/12

12:48-07:53

1 stop19h 05m

£121

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 £502.

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 £248. 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 £424.

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 £187 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 £112 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 10m

Direct flights

Every day

Airports in Seattle

1 airport
The fastest flight from San Francisco to Seattle takes 2h 10m
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 10m 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
11,314 reviews
Search Alaska Airlines flights

  • Alaska Airlines Flights From San Francisco to Seattle

    Alaska Airlines flies from San Francisco to Seattle around 11 times per week, with 11,314 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 £209 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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