Cheap flights from Seattle to San Francisco from £43

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Seattle to San Francisco departing on 18/2. 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
07:15 - 09:34
SEA
-
SFO
2h 19mdirect
United Airlines Logo
21:18 - 23:30
SFO
-
SEA
2h 12mdirect
£85United Airlines
Fri, 27 Feb - Mon, 2 Mar
Alaska Airlines Logo
18:21 - 20:36
SEA
-
SFO
2h 15mdirect
Alaska Airlines Logo
06:30 - 08:47
SFO
-
SEA
2h 17mdirect
£86Alaska Airlines
Tue, 24 Feb - Sat, 28 Feb
Delta Logo
11:35 - 13:48
SEA
-
SFO
2h 13mdirect
Delta Logo
05:55 - 08:13
SFO
-
SEA
2h 18mdirect
£87Delta
Thu, 26 Feb - Sun, 1 Mar
Alaska Airlines Logo
21:42 - 23:59
SEA
-
SFO
2h 17mdirect
Alaska Airlines Logo
09:59 - 12:16
SFO
-
SEA
2h 17mdirect
£96Alaska Airlines
Mon, 13 Apr - Wed, 15 Apr
United Airlines Logo
07:15 - 09:34
SEA
-
SFO
2h 19mdirect
United Airlines Logo
21:18 - 23:30
SFO
-
SEA
2h 12mdirect
£98United Airlines
Fri, 27 Feb - Sun, 1 Mar
United Airlines Logo
08:42 - 11:01
SEA
-
SFO
2h 19mdirect
United Airlines Logo
20:58 - 23:27
SFO
-
SEA
2h 29mdirect
£98United Airlines
Thu, 2 Apr - Sat, 18 Apr
Alaska Airlines Logo
20:41 - 22:56
SEA
-
SFO
2h 15mdirect
Alaska Airlines Logo
20:59 - 23:16
SFO
-
SEA
2h 17mdirect
£100Alaska Airlines
Thu, 19 Feb - Sat, 21 Mar
United Airlines Logo
05:05 - 07:38
SEA
-
SFO
2h 33mdirect
United Airlines Logo
21:18 - 23:30
SFO
-
SEA
2h 12mdirect
£103United Airlines
Sun, 22 Feb - Fri, 27 Feb
Alaska Airlines Logo
07:45 - 12:49
SEA
-
SFO
5h 04m
1 stop
Alaska Airlines Logo
06:30 - 08:47
SFO
-
SEA
2h 17mdirect
£107Alaska Airlines
Wed, 18 Feb - Sun, 15 Mar
Alaska Airlines Logo
15:40 - 23:59
SEA
-
SFO
8h 19m
1 stop
Alaska Airlines Logo
06:30 - 08:47
SFO
-
SEA
2h 17mdirect
£108Alaska Airlines
Tue, 24 Feb - Sat, 28 Feb

United Airlines flights from Seattle to San Francisco

Our best United Airlines deals on Seattle to San Francisco flight tickets
United Airlines
27 Feb
SEA07:15Seattle/Tacoma Intl
2h 19m
SFO09:34San Francisco
27 Feb
SFO21:18San Francisco
2h 12m
SEA23:30Seattle/Tacoma Intl
£85
United Airlines
2 Apr
SEA08:42Seattle/Tacoma Intl
2h 19m
SFO11:01San Francisco
18 Apr
SFO20:58San Francisco
2h 29m
SEA23:27Seattle/Tacoma Intl
£98
United Airlines
22 Feb
SEA05:05Seattle/Tacoma Intl
2h 33m
SFO07:38San Francisco
7 Mar
SFO18:40San Francisco
2h 18m
SEA20:58Seattle/Tacoma Intl
£103

Delta flights from Seattle to San Francisco

Our best Delta deals on Seattle to San Francisco flight tickets
Delta
26 Feb
SEA11:35Seattle/Tacoma Intl
2h 13m
SFO13:48San Francisco
1 Mar
SFO05:55San Francisco
2h 18m
SEA08:13Seattle/Tacoma Intl
£87
Delta
13 Apr
SEA21:20Seattle/Tacoma Intl
2h 17m
SFO23:37San Francisco
21 Apr
SFO16:40San Francisco
2h 23m
SEA19:03Seattle/Tacoma Intl
£100
Delta
13 Apr
SEA21:20Seattle/Tacoma Intl
2h 17m
SFO23:37San Francisco
20 Apr
SFO05:59San Francisco
2h 20m
SEA08:19Seattle/Tacoma Intl
£105

momondo Fare Finder

 
Customise your flight search to find flights from Seattle to San Francisco 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 28 January 2026.
Use the filters below to find and compare flights from Seattle to San Francisco that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

SeattleSan Francisco

SEA - SFO

SEASFO

Seattle/Tacoma Intl

Fri 27/2

07:15-09:34

Nonstop2h 19m

San Francisco

Mon 2/3

21:18-23:30

Nonstop2h 12m

£85

SeattleSan Francisco

SEA - SFO

SEASFO

Seattle/Tacoma Intl

Tue 24/2

18:21-20:36

Nonstop2h 15m

San Francisco

Sat 28/2

06:30-08:47

Nonstop2h 17m

£86

SeattleSan Francisco

SEA - SFO

SEASFO

Seattle/Tacoma Intl

Thu 26/2

11:35-13:48

Nonstop2h 13m

San Francisco

Sun 1/3

05:55-08:13

Nonstop2h 18m

£87

SeattleSan Francisco

SEA - SFO

SEASFO

Seattle/Tacoma Intl

Mon 13/4

21:42-23:59

Nonstop2h 17m

San Francisco

Wed 15/4

09:59-12:16

Nonstop2h 17m

£96

SeattleSan Francisco

SEA - SFO

SEASFO

Seattle/Tacoma Intl

Fri 27/2

07:15-09:34

Nonstop2h 19m

San Francisco

Sun 1/3

21:18-23:30

Nonstop2h 12m

£98

SeattleSan Francisco

SEA - SFO

SEASFO

Seattle/Tacoma Intl

Thu 2/4

08:42-11:01

Nonstop2h 19m

San Francisco

Sat 18/4

20:58-23:27

Nonstop2h 29m

£98

SeattleSan Francisco

SEA - SFO

SEASFO

Seattle/Tacoma Intl

Thu 19/2

20:41-22:56

Nonstop2h 15m

San Francisco

Sat 21/3

20:59-23:16

Nonstop2h 17m

£100

SeattleSan Francisco

SEA - SFO

SEASFO

Seattle/Tacoma Intl

Sun 22/2

05:05-07:38

Nonstop2h 33m

San Francisco

Fri 27/2

21:18-23:30

Nonstop2h 12m

£103

SeattleSan Francisco

SEA - SFO

SEASFO

Seattle/Tacoma Intl

Wed 18/2

07:45-12:49

1 stop5h 04m

San Francisco

Sun 15/3

06:30-08:47

Nonstop2h 17m

£107

SeattleSan Francisco

SEA - SFO

SEASFO

Seattle/Tacoma Intl

Tue 24/2

15:40-23:59

1 stop8h 19m

San Francisco

Sat 28/2

06:30-08:47

Nonstop2h 17m

£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 San Francisco from

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

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 San Francisco?

The month of February is, on average, the cheapest month to fly to San Francisco from Seattle, with most prices found around £162. If you are unable to visit San Francisco during the month of February, then departing from Seattle during the month May is also very affordable. Most momondo users find prices during this month for around £162.

What is the cheapest day to depart on your flight to San Francisco?

The cheapest day to depart on your flight to San Francisco is on a Saturday when prices can be found for as low as £173. This is often the case because there is less demand to fly during this day of the week. Flights from Seattle to San Francisco on a Wednesday will generally be more expensive and average around £729. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

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

Our most recent data shows that the best time of day to fly to San Francisco is in the morning. Flights from Seattle to San Francisco during this time can be as low as £184. Try not to purchase tickets in the afternoon because they tend to be around £262. Of course, these prices can vary depending on the time of year and what airport you fly to.

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

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

How far in advance should I book a flight to San Francisco?

You are more likely to see cheaper flights to San Francisco from Seattle when booking weeks ahead of your departure date. In general, you can expect to find flights to San Francisco for around £172 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to San Francisco from Seattle for as low as £126 on momondo.

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

There are 4 cabin classes available to choose from on Seattle/Tacoma Intl to San Francisco flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

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

As of January 2026, prices for Seattle to San Francisco flights are approximately 0% more expensive when compared to flights at the same time last year.

When to book flights from Seattle to San Francisco

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

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

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

Fastest flight time

2h 13m

Direct flights

Every day

Airports in San Francisco

1 airport
The fastest flight from Seattle to San Francisco takes 2h 13m
Direct flights go from Seattle to San Francisco every day.
There is 1 airport in San Francisco. From Seattle there are direct flights to San Francisco (SFO).
  • How far is Seattle/Tacoma Intl to San Francisco by plane?

    The distance between Seattle/Tacoma Intl and San Francisco is about 678.2 mi. Typically, this will take 2h 13m by plane in normal conditions.

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

    Prices for flights from Seattle/Tacoma Intl Airport to San Francisco Airport are updated daily.

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

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

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Seattle/Tacoma Intl Airport to San Francisco Airport.

  • What documentation or ID do you need to fly to San Francisco Airport?

    The travel and health documents required for your trip to San Francisco 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 San Francisco 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 Seattle to San Francisco?

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

Best airlines flying from Seattle to San Francisco

Compare and see reviews for airlines that fly from Seattle to San Francisco with momondo
Airline
Rating
Free Cancellation
Price
Alaska AirlinesPriceFrom £157Free CancellationRating
8.0
11,801 reviews
Search Alaska Airlines flights
  • Alaska Airlines Flights From Seattle to San Francisco

    Alaska Airlines flight deals from Seattle to San Francisco start from £157 round-trip. Over the 19 Alaska Airlines flights for this route in a normal week, average airfare is usually £199 round-trip - but some users have found much cheaper deals with momondo.

Travelling to a place near San Francisco?

Book flights to San Francisco if you plan to visit one of these locations
Sunnyvale
Santa Clara
Seaside
Big Sur
Rohnert Park
Campbell
Palo Alto
Santa Cruz
Roseville
Novato
South San Francisco
Capitola
Aptos
Sausalito
San Bruno
Woodland
Redwood City
Pacific Grove
Mill Valley
Burlingame

Why use momondo?

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

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 San Francisco from Seattle.

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

Flights from Seattle to San Francisco with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

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

Once you have performed a search for Seattle to San Francisco flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

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

Yes. momondo can track prices for Seattle to San Francisco flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.

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1 adult
Fri 27/2
Fri 6/3

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