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Cheap flights from Seattle to San Francisco from £43

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 23/3. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — SFO
27 Feb — 6 Mar1
1 adult
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from Seattle/Tacoma Intl to San Francisco are usually found in February or May, booked 83 days in advance, depart on a Friday or Thursday and return on a Tuesday

Cheap flight deals from Seattle to San Francisco

Enter your travel dates to find the best prices.

Cheapest flights from Seattle to San Francisco
Explore the most affordable flight options available from Seattle to San Francisco. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 28 January 2026.

Fri 27/207:15
SEA
-
SFO
Nonstop2h 19m
United Airlines
Mon 2/321:18
SFO
-
SEA
Nonstop2h 12m
United Airlines
Deal found 27/1£85
Tue 24/218:21
SEA
-
SFO
Nonstop2h 15m
Alaska Airlines
Sat 28/206:30
SFO
-
SEA
Nonstop2h 17m
Alaska Airlines
Deal found 25/1£86
Thu 26/211:35
SEA
-
SFO
Nonstop2h 13m
Delta
Sun 1/305:55
SFO
-
SEA
Nonstop2h 18m
Delta
Deal found 26/1£87
Mon 13/421:42
SEA
-
SFO
Nonstop2h 17m
Alaska Airlines
Wed 15/409:59
SFO
-
SEA
Nonstop2h 17m
Alaska Airlines
Deal found 26/1£96
Fri 27/207:15
SEA
-
SFO
Nonstop2h 19m
United Airlines
Sun 1/321:18
SFO
-
SEA
Nonstop2h 12m
United Airlines
Deal found 24/1£98
Thu 2/408:42
SEA
-
SFO
Nonstop2h 19m
United Airlines
Sat 18/420:58
SFO
-
SEA
Nonstop2h 29m
United Airlines
Deal found 26/1£98
Thu 19/220:41
SEA
-
SFO
Nonstop2h 15m
Alaska Airlines
Sat 21/320:59
SFO
-
SEA
Nonstop2h 17m
Alaska Airlines
Deal found 27/1£100
Sun 22/205:05
SEA
-
SFO
Nonstop2h 33m
United Airlines
Fri 27/221:18
SFO
-
SEA
Nonstop2h 12m
United Airlines
Deal found 26/1£103
Wed 18/207:45
SEA
-
SFO
1 stop5h 04m
Alaska Airlines
Sun 15/306:30
SFO
-
SEA
Nonstop2h 17m
Alaska Airlines
Deal found 27/1£107
Tue 24/206:05
SEA
-
SFO
1 stop8h 50m
Southwest
Tue 3/314:35
SFO
-
SEA
1 stop8h 30m
Southwest
Deal found 25/1£110
Sat 25/419:04
SEA
-
SFO
Nonstop2h 19m
Alaska Airlines
Sat 2/519:59
SFO
-
SEA
Nonstop2h 19m
Alaska Airlines
Deal found 27/1£111

Find flight deals from Seattle to San Francisco

Discover tips and strategies to find the most affordable flight options for your journey from Seattle (SEA) to San Francisco (SFO). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 28 January 2026.

Round-trip from

£85

One-way from

£43

Popular in

December

Cheapest in

February

Average price

£173

Good one-way deal

£78 or less
United Airlines
  • United Airlines
  • 27/2-2/3
  • Nonstop
  • 4h 31m total
  • Seattle to San Francisco
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Delta
  • Delta
  • 18/2
  • Nonstop
  • 2h 11m total
  • Seattle to San Francisco
Search Deals
Highest demand for flights based on searches. 5% potential increase in price (£7 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease (£2 potential savings vs. average return price).
Search Deals
Average for round-trip flights in January 2026
Search Deals
Price to beat on a one-way flight from Seattle/Tacoma Intl to San Francisco.
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Cheapflights 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, Cheapflights users made 858,174 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

Seattle

Fly to

San Francisco

Route

Depart

Return

Price

SeattleSan Francisco

SEA - SFO

SEASFO

Seattle/Tacoma Intl

Thu 12/3

07:25-09:50

Nonstop2h 25m

San Francisco

Thu 19/3

06:00-08:16

Nonstop2h 16m

£85

SeattleSan Francisco

SEA - SFO

SEASFO

Seattle/Tacoma Intl

Thu 26/2

17:10-19:26

Nonstop2h 16m

San Francisco

Sat 28/2

14:39-16:58

Nonstop2h 19m

£85

SeattleSan Francisco

SEA - SFO

SEASFO

Seattle/Tacoma Intl

Tue 24/2

07:10-09:30

Nonstop2h 20m

San Francisco

Tue 3/3

05:55-08:13

Nonstop2h 18m

£85

SeattleSan Francisco

SEA - SFO

SEASFO

Seattle/Tacoma Intl

Sun 1/3

07:10-09:30

Nonstop2h 20m

San Francisco

Sun 8/3

06:00-08:14

Nonstop2h 14m

£85

SeattleSan Francisco

SEA - SFO

SEASFO

Seattle/Tacoma Intl

Thu 26/2

11:35-13:48

Nonstop2h 13m

San Francisco

Mon 2/3

14:39-16:58

Nonstop2h 19m

£85

SeattleSan Francisco

SEA - SFO

SEASFO

Seattle/Tacoma Intl

Sat 21/2

20:30-22:41

Nonstop2h 11m

San Francisco

Sat 28/2

14:39-16:58

Nonstop2h 19m

£85

SeattleSan Francisco

SEA - SFO

SEASFO

Seattle/Tacoma Intl

Wed 11/3

13:32-15:48

Nonstop2h 16m

San Francisco

Wed 18/3

10:16-17:01

1 stop6h 45m

£107

SeattleSan Francisco

SEA - SFO

SEASFO

Seattle/Tacoma Intl

Wed 15/4

07:00-09:22

Nonstop2h 22m

San Francisco

Wed 15/4

20:00-22:20

Nonstop2h 20m

£107

SeattleSan Francisco

SEA - SFO

SEASFO

Seattle/Tacoma Intl

Sat 28/2

11:45-18:30

1 stop6h 45m

San Francisco

Tue 3/3

14:35-23:05

1 stop8h 30m

£110

SeattleSan Francisco

SEA - SFO

SEASFO

Seattle/Tacoma Intl

Thu 26/2

16:30-00:05

1 stop7h 35m

San Francisco

Tue 3/3

14:35-23:05

1 stop8h 30m

£110

Flights are sorted by cheapest return flights first.

Deals found on 24/1

Showing 1-10 of 18 results
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Best time to book a flight from Seattle to San Francisco

Have a flexible travel schedule? Discover the best time to fly to San Francisco from Seattle with our price prediction graph.
Estimated return price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Seattle to San Francisco

How far ahead should I book a flight from Seattle to San Francisco?

Use this chart to determine the optimal time to book a return flight from Seattle to San Francisco. Price data was last updated on 23 January 2026.

The best time to book flights from Seattle to San Francisco is 39 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

What is the cheapest month to book a flight from Seattle to San Francisco?

Currently, January is the cheapest month in which you can book a flight from Seattle to San Francisco (average of £60). Flying from Seattle to San Francisco in May is currently the most expensive (average of £100). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from SEA to SFO?

Find hourly flight availability from Seattle to San Francisco. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 28 January 2026.

Unlike in the afternoon, when flights are generally more expensive, you can save up to 29% on flights from Seattle to San Francisco by exploring options for tickets in the morning.

Reviews of airlines servicing San Francisco

Get insights into the airlines that provide service to San Francisco. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to San Francisco. Reviews last updated 28 January 2026.
See what other customers who have flown with Alaska Airlines from Seattle to San Francisco have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very Good
11,801 reviews
Check prices

Entertainment

7.0

Crew

8.5

Food

7.1

Overall

8.0

Comfort

7.8

Boarding

8.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Alaska Airlines
8.0
Very Good
11,801 reviews
Alaska Airlines
8.0
Very Good
11,801 reviews
Check prices

Entertainment

7.0

Crew

8.5

Food

7.1

Overall

8.0

Comfort

7.8

Boarding

8.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

Related info for your journey

Find useful and relevant information for your journey from Seattle to San Francisco. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airports do I use to fly from Seattle to San Francisco?

    You will need to book a flight from Seattle/Tacoma Intl to San Francisco if you want to fly from Seattle to San Francisco. At least 1 airline has flights from Seattle/Tacoma Intl (SEA) to San Francisco (SFO) on a regular basis. There are 66 flights to San Francisco from the Seattle airport per day. If you manage to book one that is nonstop, then you can expect the flight time from SEA to SFO to be around 2h 13m.

  • How popular is this Seattle to San Francisco flight route?

    Flights from Seattle/Tacoma Intl to San Francisco have been viewed 6 times in the past calendar month.

  • How long is the flight from Seattle to San Francisco?

    Departing from Seattle to San Francisco will take you 2h 25m. The distance between Seattle and San Francisco is about 679 mi. Generally, flights for this route are direct.

  • What is the cheapest airline to fly from Seattle to San Francisco round-trip?

    According to our current data, Alaska Airlines (£157), offers the cheapest pricing from Seattle to San Francisco. This flight start at 8% lower than the current average price 3 months from now.

  • What are the cheapest airlines to fly from Seattle to San Francisco one-way?

    The cheapest airline one-way is Hawaiian Airlines, with whom users have recently found tickets for as low as £39. However, be on the lookout for offers from Alaska Airlines and Delta, as they are both options that can get you from Seattle to San Francisco for a low price.

  • What are the most reliable airlines from Seattle to San Francisco?

    No one likes to see their flight delayed. When booking a flight from Seattle to San Francisco consider choosing SWISS (83%), Air China (82%) or Turkish Airlines (82%) as they are the most reliable in getting you off to your destination on time.

  • What are the cheapest flights from Seattle to San Francisco?

    On average you can expect to pay £104 for a flight from Seattle to San Francisco. The cheapest flight overall is £68 while the most popular route, (Seattle/Tacoma Intl - San Francisco) is currently priced at £238.

  • Can I find deals for flights from Seattle to San Francisco that include hotel bookings?

    Yes. In addition to deals on Seattle to San Francisco flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Seattle to San Francisco?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Seattle to San Francisco.

  • Can I find deals for business class flights from Seattle to San Francisco?

    Yes. Cheapflights offers flight deals from Seattle to San Francisco by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Seattle to San Francisco?

    Currently, January is the cheapest month in which you can book a flight from Seattle to San Francisco (average of £60). Flying from Seattle to San Francisco in May is currently the most expensive (average of £100). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Travelling to a place near San Francisco?

Book flights to San Francisco if you plan to visit one of these locations
Santa Cruz
Newark
San Bruno
Bodega Bay
South San Francisco
Sunnyvale
Pacific Grove

Browse thousands of different options on Cheapflights for your next trip

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Top airline flying from Seattle to San Francisco

Discover the top airline that operate flights from Seattle to San Francisco. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 28 January 2026.
AirlineCheapestAverageFlexibilityOn-time
Alaska AirlinesCheapest£157Average£199FlexibilityNo cancel feeOn-time75%
Search Alaska Airlines flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Seattle to San Francisco?

Cheapflights makes it easy to find Seattle to San Francisco flights by helping our users search from 900+ travel sites for deals. We also provide you with filters for cabin, price, airline, airports, number of stops, and many more to narrow down that perfect flight.

Why should you use Cheapflights to find cheap flight tickets from Seattle to San Francisco?

Cheapflights helps you find that perfect flight to San Francisco from Seattle by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

Can Cheapflights find flights from Seattle to San Francisco with no change fees?

Yes! Cheapflights helps users easily find flights from Seattle to San Francisco with no change fees.

Can Cheapflights notify me if prices for flights from Seattle to San Francisco become cheaper?

Of course! You can now track prices for flights from Seattle to San Francisco and get an alert from Cheapflights when they change. Have a valid email address ready and click the bell icon next to the flight deals above to set up your price alerts.

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