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Cheap flights from San Francisco to Seattle from £44

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 30/1. 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

Enter your travel dates to find the best prices.
Delta Logo
11:02 - 18:43
SFO
-
SEA
7h 41m1 stop
Delta Logo
14:02 - 20:29
SEA
-
SFO
6h 27m1 stop
£87Delta
Thu, 29 Jan - Mon, 2 Feb
Delta Logo
08:25 - 14:54
SFO
-
SEA
6h 29m1 stop
Delta Logo
14:02 - 20:29
SEA
-
SFO
6h 27m1 stop
£88Delta
Thu, 29 Jan - Mon, 2 Feb
Alaska Airlines Logo
10:30 - 09:53
SFO
-
SEA
23h 23m1 stop
Alaska Airlines Logo
20:50 - 23:03
SEA
-
SFO
2h 13mdirect
£89Alaska Airlines
Tue, 27 Jan - Fri, 30 Jan
Southwest Logo
05:30 - 12:20
SFO
-
SEA
6h 50m1 stop
Southwest Logo
13:20 - 21:50
SEA
-
SFO
8h 30m1 stop
£90Southwest
Tue, 27 Jan - Tue, 27 Jan
Alaska Airlines Logo
12:00 - 14:18
SFO
-
SEA
2h 18mdirect
Alaska Airlines Logo
16:43 - 21:55
SEA
-
SFO
5h 12m1 stop
£91Alaska Airlines
Sat, 7 Feb - Sat, 7 Feb
Alaska Airlines Logo
20:47 - 23:07
SFO
-
SEA
2h 20mdirect
Alaska Airlines Logo
20:20 - 08:46
SEA
-
SFO
12h 26m1 stop
£91Alaska Airlines
Sat, 14 Feb - Tue, 17 Feb
Alaska Airlines Logo
09:59 - 12:16
SFO
-
SEA
2h 17mdirect
Alaska Airlines Logo
20:10 - 22:27
SEA
-
SFO
2h 17mdirect
£92Alaska Airlines
Wed, 1 Apr - Mon, 13 Apr
Southwest Logo
11:10 - 21:50
SFO
-
SEA
10h 40m2 stops
Southwest Logo
09:55 - 17:05
SEA
-
SFO
7h 10m1 stop
£94Southwest
Tue, 27 Jan - Wed, 28 Jan
Alaska Airlines Logo
19:28 - 21:48
SFO
-
SEA
2h 20mdirect
Alaska Airlines Logo
21:41 - 23:59
SEA
-
SFO
2h 18mdirect
£94Alaska Airlines
Sat, 14 Feb - Sun, 15 Feb
Alaska Airlines Logo
14:58 - 18:43
SFO
-
SEA
3h 45m1 stop
Alaska Airlines Logo
20:50 - 23:03
SEA
-
SFO
2h 13mdirect
£95Alaska Airlines
Thu, 29 Jan - Thu, 29 Jan

Delta flights from San Francisco to Seattle

Our best Delta deals on San Francisco to Seattle flight tickets
Delta
29 Jan
SFO11:02San Francisco
7h 41m
1 stop
SEA18:43Seattle/Tacoma Intl
2 Feb
SEA14:02Seattle/Tacoma Intl
6h 27m
1 stop
SFO20:29San Francisco
£87
Delta
29 Jan
SFO08:25San Francisco
6h 29m
1 stop
SEA14:54Seattle/Tacoma Intl
2 Feb
SEA14:02Seattle/Tacoma Intl
6h 27m
1 stop
SFO20:29San Francisco
£88
Delta
29 Jan
SFO14:35San Francisco
2h 19m
SEA16:54Seattle/Tacoma Intl
2 Feb
SEA21:20Seattle/Tacoma Intl
2h 10m
SFO23:30San Francisco
£100

Southwest flights from San Francisco to Seattle

Our best Southwest deals on San Francisco to Seattle flight tickets
Southwest
27 Jan
SFO05:30San Francisco
6h 50m
1 stop
SEA12:20Seattle/Tacoma Intl
27 Jan
SEA13:20Seattle/Tacoma Intl
8h 30m
1 stop
SFO21:50San Francisco
£90
Southwest
27 Jan
SFO11:10San Francisco
10h 40m
2 stops
SEA21:50Seattle/Tacoma Intl
28 Jan
SEA09:55Seattle/Tacoma Intl
7h 10m
1 stop
SFO17:05San Francisco
£94
Southwest
27 Jan
SFO14:35San Francisco
8h 30m
1 stop
SEA23:05Seattle/Tacoma Intl
29 Jan
SEA06:05Seattle/Tacoma Intl
8h 50m
1 stop
SFO14:55San Francisco
£97

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 9 January 2026.
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

Thu 29/1

11:02-18:43

1 stop7h 41m

Seattle/Tacoma Intl

Mon 2/2

14:02-20:29

1 stop6h 27m

£87

San FranciscoSeattle

SFO - SEA

SFOSEA

San Francisco

Thu 29/1

08:25-14:54

1 stop6h 29m

Seattle/Tacoma Intl

Mon 2/2

14:02-20:29

1 stop6h 27m

£88

San FranciscoSeattle

SFO - SEA

SFOSEA

San Francisco

Tue 27/1

10:30-09:53

1 stop23h 23m

Seattle/Tacoma Intl

Fri 30/1

20:50-23:03

Nonstop2h 13m

£89

San FranciscoSeattle

SFO - SEA

SFOSEA

San Francisco

Tue 27/1

05:30-12:20

1 stop6h 50m

Seattle/Tacoma Intl

Tue 27/1

13:20-21:50

1 stop8h 30m

£90

San FranciscoSeattle

SFO - SEA

SFOSEA

San Francisco

Sat 7/2

12:00-14:18

Nonstop2h 18m

Seattle/Tacoma Intl

Sat 7/2

16:43-21:55

1 stop5h 12m

£91

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

£91

San FranciscoSeattle

SFO - SEA

SFOSEA

San Francisco

Wed 1/4

09:59-12:16

Nonstop2h 17m

Seattle/Tacoma Intl

Mon 13/4

20:10-22:27

Nonstop2h 17m

£92

San FranciscoSeattle

SFO - SEA

SFOSEA

San Francisco

Tue 27/1

11:10-21:50

2 stops10h 40m

Seattle/Tacoma Intl

Wed 28/1

09:55-17:05

1 stop7h 10m

£94

San FranciscoSeattle

SFO - SEA

SFOSEA

San Francisco

Sat 14/2

19:28-21:48

Nonstop2h 20m

Seattle/Tacoma Intl

Sun 15/2

21:41-23:59

Nonstop2h 18m

£94

San FranciscoSeattle

SFO - SEA

SFOSEA

San Francisco

Thu 29/1

14:58-18:43

1 stop3h 45m

Seattle/Tacoma Intl

Thu 29/1

20:50-23:03

Nonstop2h 13m

£95

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 £157, 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 £161.

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 £154. 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 Thursday as prices are generally higher than usual. According to our data, the average ticket price to Seattle on Thursday is £431.

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 £169. 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 £352.

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 £184 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 £131 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 January 2026, prices for San Francisco to Seattle flights are approximately 12% 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 17m

Direct flights

Every day

Airports in Seattle

1 airport
The fastest flight from San Francisco to Seattle takes 2h 17m
Direct flights go from San Francisco to Seattle every day.
There is 1 airport in Seattle. From San Francisco there are direct flights to 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 17m 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 £116Free CancellationRating
8.0
11,672 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 11,672 momondo users rating the airline 8.0/10. The cheapest Alaska Airlines deal from San Francisco to Seattle in the last 72 hours was £116 (round-trip), much lower than the average airfare cost of £204 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
SeaTac
Tukwila

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.

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