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Cheap flights from Seattle to San Francisco from £57

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 10/1. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — SFO
11 Jan — 18 Jan1
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 February, booked 83 days in advance, depart on a Friday or Saturday and return on a Thursday

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 12 December 2025.

Wed 31/1219:23SEA - SFO
Nonstop2h 18mAlaska Airlines
Thu 8/118:18SFO - SEA
Nonstop2h 16mAlaska Airlines
Deal found 10/12£110
Wed 31/1207:13SEA - SFO
Nonstop2h 20mDelta
Wed 7/118:30SFO - SEA
Nonstop2h 16mDelta
Deal found 10/12£132
Wed 31/1207:13SEA - SFO
Nonstop2h 20mDelta
Tue 6/116:03SFO - SEA
1 stop6h 21mDelta
Deal found 10/12£140
Wed 31/1213:10SEA - SFO
1 stop8h 40mSouthwest
Tue 6/111:10SFO - SEA
1 stop11h 55mSouthwest
Deal found 10/12£162
Tue 30/1222:15SEA - SFO
Nonstop2h 17mDelta
Mon 5/106:00SFO - SEA
Nonstop2h 20mDelta
Deal found 10/12£170
Tue 30/1221:35SEA - SFO
Nonstop2h 19mAlaska Airlines
Thu 1/116:42SFO - SEA
Nonstop2h 17mAlaska Airlines
Deal found 9/12£173
Thu 25/1207:10SEA - SFO
Nonstop2h 23mDelta
Tue 6/113:00SFO - SEA
1 stop6h 34mDelta
Deal found 10/12£177
Tue 30/1216:59SEA - SFO
1 stop6h 50mAlaska Airlines
Wed 7/113:10SFO - SEA
1 stop6h 31mAlaska Airlines
Deal found 9/12£180
Wed 24/1213:35SEA - SFO
Nonstop2h 17mUnited Airlines
Wed 31/1222:48SFO - SEA
Nonstop2h 11mUnited Airlines
Deal found 10/12£184
Mon 29/1222:15SEA - SFO
Nonstop2h 17mDelta
Thu 1/105:45SFO - SEA
Nonstop2h 21mDelta
Deal found 9/12£188
Wed 31/1207:13SEA - SFO
Nonstop2h 20mDelta
Sat 3/105:45SFO - SEA
Nonstop2h 21mDelta
Deal found 10/12£192
Wed 31/1219:23SEA - SFO
Nonstop2h 18mAlaska Airlines
Sun 4/110:46SFO - SEA
1 stop21h 39mAlaska Airlines
Deal found 9/12£194

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 12 December 2025.

Round-trip from

£87

One-way from

£57

Popular in

December

Cheapest in

January

Average price

£204
Delta
  • Delta
  • 8/1-12/1
  • 2 total stops
  • 12h 42m total
  • Seattle to San Francisco
Search Deals
Southwest
  • Southwest
  • 10/1
  • 1 total stop
  • 6h 50m total
  • Seattle to San Francisco
Search Deals
Highest demand for flights based on searches. 2% potential increase in price (£4 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 December 2025
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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 12 December 2025.
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 8/1

10:25-17:58

1 stop7h 33m

San Francisco

Mon 12/1

13:20-18:29

1 stop5h 09m

£87

SeattleSan Francisco

SEA - SFO

SEASFO

Seattle/Tacoma Intl

Mon 26/1

17:40-22:54

1 stop5h 14m

San Francisco

Fri 30/1

05:55-12:57

1 stop7h 02m

£87

SeattleSan Francisco

SEA - SFO

SEASFO

Seattle/Tacoma Intl

Sat 24/1

17:40-22:54

1 stop5h 14m

San Francisco

Sat 31/1

13:20-18:29

1 stop5h 09m

£87

SeattleSan Francisco

SEA - SFO

SEASFO

Seattle/Tacoma Intl

Sat 28/2

11:17-17:56

1 stop6h 39m

San Francisco

Tue 3/3

13:08-20:30

1 stop7h 22m

£87

SeattleSan Francisco

SEA - SFO

SEASFO

Seattle/Tacoma Intl

Sat 17/1

05:25-12:23

1 stop6h 58m

San Francisco

Tue 20/1

11:02-18:42

1 stop7h 40m

£87

SeattleSan Francisco

SEA - SFO

SEASFO

Seattle/Tacoma Intl

Fri 27/2

19:00-23:54

1 stop4h 54m

San Francisco

Sat 28/2

06:00-12:58

1 stop6h 58m

£87

SeattleSan Francisco

SEA - SFO

SEASFO

Seattle/Tacoma Intl

Wed 25/2

08:15-10:37

Nonstop2h 22m

San Francisco

Sun 1/3

07:50-14:41

1 stop6h 51m

£99

SeattleSan Francisco

SEA - SFO

SEASFO

Seattle/Tacoma Intl

Fri 13/3

07:45-12:49

1 stop5h 04m

San Francisco

Sun 15/3

06:30-08:47

Nonstop2h 17m

£99

SeattleSan Francisco

SEA - SFO

SEASFO

Seattle/Tacoma Intl

Mon 5/1

18:04-21:36

1 stop3h 32m

San Francisco

Thu 8/1

12:00-14:18

Nonstop2h 18m

£99

SeattleSan Francisco

SEA - SFO

SEASFO

Seattle/Tacoma Intl

Mon 5/1

21:20-23:28

Nonstop2h 08m

San Francisco

Thu 8/1

10:35-12:58

Nonstop2h 23m

£102

Flights are sorted by cheapest return flights first.

Deals found on 10/12

Showing 1-10 of 21 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 5 December 2025.

The best time to book flights from Seattle to San Francisco is 30 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 £63). Flying from Seattle to San Francisco in May is currently the most expensive (average of £102). 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 12 December 2025.

Unlike in the afternoon, when flights are generally more expensive, you can save up to 84% 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 12 December 2025.
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
11,432 reviews
Check prices

Food

7.1

Boarding

8.1

Comfort

7.8

Overall

8.0

Entertainment

7.0

Crew

8.5

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
11,432 reviews
Alaska Airlines
8.0
Very Good
11,432 reviews
Check prices

Food

7.1

Boarding

8.1

Comfort

7.8

Overall

8.0

Entertainment

7.0

Crew

8.5

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 74 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 10m.

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

    Flights from Seattle/Tacoma Intl to San Francisco have been viewed 9 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 7h 33m. The distance between Seattle and San Francisco is about 679 mi.

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

    According to our current data, Alaska Airlines (£83), offers the cheapest pricing from Seattle to San Francisco. This flight start at 52% 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 £44. 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 Horizon Air (89%), WestJet (80%) or Turkish Airlines (79%) as they are the most reliable in getting you off to your destination on time.

  • 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 £63). Flying from Seattle to San Francisco in May is currently the most expensive (average of £102). 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
South San Francisco
Bodega Bay
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 12 December 2025.
AirlineCheapestAverageFlexibilityOn-time
Alaska AirlinesCheapest£83Average£185FlexibilityNo 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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