Cheap flights from Seattle to San Francisco from £58

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 13/5. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — SFO
21 May — 28 May1
1 adult
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from Seattle/Tacoma Intl to San Francisco are usually found in January or September, booked 78 days in advance, depart on a Wednesday 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 21 April 2026.

Tue 19/511:39
SEA
-
SFO
Nonstop2h 14m
United Airlines
Tue 26/522:59
SFO
-
SEA
Nonstop2h 14m
United Airlines
Deal found 20/4£104
Thu 14/507:08
SEA
-
SFO
Nonstop2h 18m
United Airlines
Tue 26/522:59
SFO
-
SEA
Nonstop2h 14m
United Airlines
Deal found 20/4£109
Tue 12/514:53
SEA
-
SFO
Nonstop2h 21m
Alaska Airlines
Tue 12/519:59
SFO
-
SEA
Nonstop2h 19m
Alaska Airlines
Deal found 17/4£112
Mon 11/507:08
SEA
-
SFO
Nonstop2h 18m
United Airlines
Fri 15/520:58
SFO
-
SEA
Nonstop2h 32m
United Airlines
Deal found 20/4£113
Wed 13/507:15
SEA
-
SFO
Nonstop2h 19m
Delta
Wed 20/505:55
SFO
-
SEA
Nonstop2h 22m
Delta
Deal found 17/4£116
Tue 12/507:08
SEA
-
SFO
Nonstop2h 18m
United Airlines
Tue 19/522:35
SFO
-
SEA
Nonstop2h 37m
United Airlines
Deal found 20/4£122
Tue 12/514:20
SEA
-
SFO
1 stop8h 25m
Southwest
Wed 13/510:30
SFO
-
SEA
1 stop7h 15m
Southwest
Deal found 18/4£131
Tue 2/617:35
SEA
-
SFO
1 stop5h 40m
Southwest
Wed 10/617:20
SFO
-
SEA
2 stops7h 20m
Southwest
Deal found 16/4£132
Wed 13/508:25
SEA
-
SFO
1 stop8h 15m
Southwest
Tue 19/511:25
SFO
-
SEA
2 stops8h 55m
Southwest
Deal found 16/4£135
Tue 15/908:30
SEA
-
SFO
1 stop8h 25m
Southwest
Wed 23/910:40
SFO
-
SEA
1 stop6h 50m
Southwest
Deal found 20/4£138

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 21 April 2026.

Round-trip from

£104

One-way from

£58

Popular in

April

Cheapest in

January

Average price

£224

Good one-way deal

£155 or less
United Airlines
  • United Airlines
  • 19/5-26/5
  • Nonstop
  • 4h 28m total
  • Seattle to San Francisco
Alaska Airlines
  • Alaska Airlines
  • 13/5
  • Nonstop
  • 2h 18m total
  • Seattle to San Francisco
Highest demand for flights based on searches. 9% potential increase in price (£14 potential increase over avg. return price).
Cheapest flight prices on average. 2% potential price decrease (£3 potential savings vs. average return price).
Average for round-trip flights in April 2026
Price to beat on a one-way flight from Seattle/Tacoma Intl to San Francisco.

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 21 April 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

Cheapest return flight

SeattleSan Francisco

SEA - SFO

SEASFO

Seattle/Tacoma Intl

Mon 11/5

06:15-13:45

1 stop7h 30m

San Francisco

Tue 12/5

11:25-22:55

2 stops11h 30m

£158
Fastest return journey

SeattleSan Francisco

SEA - SFO

SEASFO

Seattle/Tacoma Intl

Wed 20/5

13:21-15:35

Nonstop2h 14m

San Francisco

Thu 4/6

07:00-09:22

Nonstop2h 22m

£160

SeattleSan Francisco

SEA - SFO

SEASFO

Seattle/Tacoma Intl

Tue 12/5

10:00-12:29

Nonstop2h 29m

San Francisco

Sat 16/5

17:37-19:55

Nonstop2h 18m

£161

SeattleSan Francisco

SEA - SFO

SEASFO

Seattle/Tacoma Intl

Wed 20/5

06:50-15:20

2 stops8h 30m

San Francisco

Thu 4/6

14:15-23:50

2 stops9h 35m

£162

SeattleSan Francisco

SEA - SFO

SEASFO

Seattle/Tacoma Intl

Sun 31/5

10:00-12:29

Nonstop2h 29m

San Francisco

Sun 7/6

06:00-08:16

Nonstop2h 16m

£175

SeattleSan Francisco

SEA - SFO

SEASFO

Seattle/Tacoma Intl

Tue 19/5

12:10-18:30

1 stop6h 20m

San Francisco

Tue 26/5

11:25-20:20

2 stops8h 55m

£179

SeattleSan Francisco

SEA - SFO

SEASFO

Seattle/Tacoma Intl

Thu 14/5

10:00-12:29

Nonstop2h 29m

San Francisco

Wed 20/5

05:55-08:17

Nonstop2h 22m

£183

SeattleSan Francisco

SEA - SFO

SEASFO

Seattle/Tacoma Intl

Sat 16/5

11:15-18:55

1 stop7h 40m

San Francisco

Tue 19/5

07:20-20:20

2 stops13h 00m

£184

SeattleSan Francisco

SEA - SFO

SEASFO

Seattle/Tacoma Intl

Mon 1/6

05:00-12:35

2 stops7h 35m

San Francisco

Mon 8/6

14:15-23:50

2 stops9h 35m

£186

SeattleSan Francisco

SEA - SFO

SEASFO

Seattle/Tacoma Intl

Wed 3/6

17:35-23:15

1 stop5h 40m

San Francisco

Wed 10/6

17:20-00:40

2 stops7h 20m

£191

Flights are sorted by cheapest return flights first.

Deals found on 19/4

Showing 1-10 of 22 resultsSorted by cheapest first
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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 17 April 2026.

The best time to book flights from Seattle to San Francisco is 78 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 £138). Flying from Seattle to San Francisco in April is currently the most expensive (average of £224). 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 21 April 2026.

Unlike in the evening, when flights are generally more expensive, you can save up to 80% on flights from Seattle to San Francisco by exploring options for tickets in the afternoon.

How much does it cost for a return flight from Seattle to San Francisco?

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 21 April 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.

Overall

7.9

Boarding

8.1

Crew

8.5

Entertainment

7.0

Food

7.0

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

Overall

7.9

Boarding

8.1

Crew

8.5

Entertainment

7.0

Food

7.0

Comfort

7.8

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 37 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 12m.

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

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

    Departing from Seattle to San Francisco will take you 2h 14m. The distance between Seattle and San Francisco is about 679 mi. Both multi-stop and direct flights can be found to your destination and back.

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

    According to our current data, Alaska Airlines (£132), offers the cheapest pricing from Seattle to San Francisco. This flight start at 29% 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 Alaska Airlines, with whom users have recently found tickets for as low as £54. However, be on the lookout for offers from Delta and United Airlines, 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 Aeromexico (89%), Air France (83%) or SWISS (83%) 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 £162 for a flight from Seattle to San Francisco. The cheapest flight overall is £132 while the most popular route, (Seattle/Tacoma Intl - San Francisco) is currently priced at £150.

  • 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 £138). Flying from Seattle to San Francisco in April is currently the most expensive (average of £224). 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

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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 21 April 2026.
AirlineCheapestAverageFlexibilityOn-time
Alaska AirlinesCheapest£132Average£187FlexibilityNo cancel feeOn-time75%
Search Alaska Airlines flights

Fly with Cheapflights

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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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