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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 10/9. 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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Find the cheapest flights from San Francisco to Seattle

Cheap return flights

Alaska Airlines Logo
08:00 - 10:20SFO-SEA
2h 20mdirect
Alaska Airlines Logo
13:40 - 15:52SEA-SFO
2h 12mdirect
£85Alaska Airlines
Find Deal
Tue, 9 Sep - Tue, 9 Sep
Alaska Airlines Logo
10:08 - 12:27SFO-SEA
2h 19mdirect
Alaska Airlines Logo
13:40 - 15:52SEA-SFO
2h 12mdirect
£89Alaska Airlines
Find Deal
Tue, 9 Sep - Tue, 16 Sep
Hawaiian Airlines Logo
06:00 - 08:07SFO-SEA
2h 07mdirect
Hawaiian Airlines Logo
20:15 - 22:29SEA-SFO
2h 14mdirect
£94Hawaiian Airlines
Find Deal
Sat, 27 Sep - Sat, 4 Oct
Delta Logo
13:45 - 16:00SFO-SEA
2h 15mdirect
Delta Logo
07:20 - 09:48SEA-SFO
2h 28mdirect
£95Delta
Find Deal
Wed, 10 Sep - Sat, 13 Sep
Alaska Airlines Logo
08:00 - 10:20SFO-SEA
2h 20mdirect
Alaska Airlines Logo
15:55 - 18:09SEA-SFO
2h 14mdirect
£96Alaska Airlines
Find Deal
Mon, 8 Sep - Tue, 9 Sep
Alaska Airlines Logo
11:44 - 15:35SFO-SEA
3h 51m1 stop
Alaska Airlines Logo
18:05 - 20:20SEA-SFO
2h 15mdirect
£97Alaska Airlines
Find Deal
Tue, 9 Sep - Tue, 9 Sep
Logo
06:00 - 08:07SFO-SEA
2h 07mdirect
Logo
11:20 - 16:03SEA-SFO
4h 43m1 stop
£99
Find Deal
Sat, 27 Sep - Sat, 4 Oct
Delta Logo
05:55 - 08:11SFO-SEA
2h 16mdirect
Delta Logo
17:45 - 20:05SEA-SFO
2h 20mdirect
£101Delta
Find Deal
Sat, 13 Sep - Sat, 20 Sep
Southwest Logo
17:25 - 22:50SFO-SEA
5h 25m1 stop
Southwest Logo
16:10 - 21:25SEA-SFO
5h 15m1 stop
£104Southwest
Find Deal
Tue, 9 Sep - Wed, 10 Sep
Southwest Logo
17:25 - 22:50SFO-SEA
5h 25m1 stop
Southwest Logo
05:15 - 17:55SEA-SFO
12h 40m1 stop
£108Southwest
Find Deal
Tue, 9 Sep - Tue, 16 Sep

Delta flights from San Francisco to Seattle

Our best Delta deals on San Francisco to Seattle flight tickets
Delta
10 Sept
SFO13:45San Francisco
2h 15m
SEA16:00Seattle/Tacoma Intl
13 Sept
SEA07:20Seattle/Tacoma Intl
2h 28m
SFO09:48San Francisco
£95
Find similar
Delta
13 Sept
SFO05:55San Francisco
2h 16m
SEA08:11Seattle/Tacoma Intl
20 Sept
SEA17:45Seattle/Tacoma Intl
2h 20m
SFO20:05San Francisco
£101
Find similar
Delta
13 Sept
SFO13:45San Francisco
2h 21m
SEA16:06Seattle/Tacoma Intl
22 Sept
SEA21:20Seattle/Tacoma Intl
2h 09m
SFO23:29San Francisco
£102
Find similar

Alaska Airlines flights from San Francisco to Seattle

Our best Alaska Airlines deals on San Francisco to Seattle flight tickets
Alaska Airlines
9 Sept
SFO08:00San Francisco
2h 20m
SEA10:20Seattle/Tacoma Intl
9 Sept
SEA13:40Seattle/Tacoma Intl
2h 12m
SFO15:52San Francisco
£85
Find similar
Alaska Airlines
9 Sept
SFO10:08San Francisco
2h 19m
SEA12:27Seattle/Tacoma Intl
16 Sept
SEA13:40Seattle/Tacoma Intl
2h 12m
SFO15:52San Francisco
£89
Find similar
Alaska Airlines
8 Sept
SFO08:00San Francisco
2h 20m
SEA10:20Seattle/Tacoma Intl
9 Sept
SEA15:55Seattle/Tacoma Intl
2h 14m
SFO18:09San Francisco
£96
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 15 August 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 9/9

08:00-10:20

Nonstop2h 20m

Seattle/Tacoma Intl

Tue 9/9

13:40-15:52

Nonstop2h 12m

£85

San FranciscoSeattle

SFO - SEA

SFOSEA

San Francisco

Tue 9/9

10:08-12:27

Nonstop2h 19m

Seattle/Tacoma Intl

Tue 16/9

13:40-15:52

Nonstop2h 12m

£89

San FranciscoSeattle

SFO - SEA

SFOSEA

San Francisco

Sat 27/9

06:00-08:07

Nonstop2h 07m

Seattle/Tacoma Intl

Sat 4/10

20:15-22:29

Nonstop2h 14m

£94

San FranciscoSeattle

SFO - SEA

SFOSEA

San Francisco

Wed 10/9

13:45-16:00

Nonstop2h 15m

Seattle/Tacoma Intl

Sat 13/9

07:20-09:48

Nonstop2h 28m

£95

San FranciscoSeattle

SFO - SEA

SFOSEA

San Francisco

Mon 8/9

08:00-10:20

Nonstop2h 20m

Seattle/Tacoma Intl

Tue 9/9

15:55-18:09

Nonstop2h 14m

£96

San FranciscoSeattle

SFO - SEA

SFOSEA

San Francisco

Tue 9/9

11:44-15:35

1 stop3h 51m

Seattle/Tacoma Intl

Tue 9/9

18:05-20:20

Nonstop2h 15m

£97

San FranciscoSeattle

SFO - SEA

SFOSEA

San Francisco

Sat 27/9

06:00-08:07

Nonstop2h 07m

Seattle/Tacoma Intl

Sat 4/10

11:20-16:03

1 stop4h 43m

£99

San FranciscoSeattle

SFO - SEA

SFOSEA

San Francisco

Sat 13/9

05:55-08:11

Nonstop2h 16m

Seattle/Tacoma Intl

Sat 20/9

17:45-20:05

Nonstop2h 20m

£101

San FranciscoSeattle

SFO - SEA

SFOSEA

San Francisco

Tue 9/9

17:25-22:50

1 stop5h 25m

Seattle/Tacoma Intl

Wed 10/9

16:10-21:25

1 stop5h 15m

£104

San FranciscoSeattle

SFO - SEA

SFOSEA

San Francisco

Tue 9/9

17:25-22:50

1 stop5h 25m

Seattle/Tacoma Intl

Tue 16/9

05:15-17:55

1 stop12h 40m

£108

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 October. Flight prices, which tend to average around £145, are often lower during this time because this is during the off-season. The month of January is another great option to travel to Seattle, with average flight prices from San Francisco averaging around £148.

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 £152. 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 Tuesday as prices are generally higher than usual. According to our data, the average ticket price to Seattle on Tuesday is £374.

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 at midday. momondo users have found flights departing from San Francisco to Seattle at midday for as low as £151. 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 £350.

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 £175 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 4 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 August 2025, prices for San Francisco to Seattle flights are approximately 4% 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

Best price found

£45

Fastest flight time

2h 07m

Direct flights

Every day

Airports in Seattle

1 airport
The best one-way flight to Seattle from San Francisco in the past 72 hours is £45. The best return flight deal from San Francisco to Seattle found on momondo in the last 72 hours is £85.
The fastest flight from San Francisco to Seattle takes 2h 07m
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 07m 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 £122Free CancellationRating
8.0
10,000 reviews
Search Alaska Airlines flights

  • Alaska Airlines Flights From San Francisco to Seattle

    Alaska Airlines flies from San Francisco to Seattle around 13 times per week, with 10,000 momondo users rating the airline 8.0/10. The cheapest Alaska Airlines deal from San Francisco to Seattle in the last 72 hours was £166 (round-trip), much lower than the average airfare cost of £240 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
Kent
SeaTac
Fife
Tukwila
Renton

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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