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Cheap flights from Seattle to San Francisco from $128

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 5/8. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — SFO
4 Aug — 11 Aug1
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 October, booked 78 days in advance, depart on a Tuesday or Wednesday and return on a Wednesday

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 5 July 2026.

Wed 19/807:10
SEA
-
SFO
1 stop6h 05m
Southwest
Wed 26/816:45
SFO
-
SEA
1 stop6h 40m
Southwest
Deal found 30/6$255
Wed 22/706:15
SEA
-
SFO
1 stop8h 45m
Southwest
Tue 28/717:20
SFO
-
SEA
2 stops7h 25m
Southwest
Deal found 1/7$256
Sat 25/705:00
SEA
-
SFO
Nonstop2h 20m
United Airlines
Tue 28/716:27
SFO
-
SEA
Nonstop2h 20m
United Airlines
Deal found 2/7$258
Tue 28/707:00
SEA
-
SFO
Nonstop2h 18m
United Airlines
Tue 4/814:00
SFO
-
SEA
Nonstop2h 20m
United Airlines
Deal found 30/6$259
Tue 28/707:00
SEA
-
SFO
Nonstop2h 18m
United Airlines
Tue 28/716:27
SFO
-
SEA
Nonstop2h 20m
United Airlines
Deal found 30/6$261
Sat 15/814:35
SEA
-
SFO
Nonstop2h 21m
Delta
Mon 17/806:20
SFO
-
SEA
Nonstop2h 11m
Delta
Deal found 1/7$262
Sat 15/818:36
SEA
-
SFO
Nonstop2h 12m
Alaska Airlines
Mon 17/809:00
SFO
-
SEA
Nonstop2h 15m
Alaska Airlines
Deal found 1/7$264
Sat 1/805:00
SEA
-
SFO
Nonstop2h 20m
United Airlines
Sat 1/818:38
SFO
-
SEA
Nonstop2h 25m
United Airlines
Deal found 30/6$268
Tue 28/708:45
SEA
-
SFO
Nonstop2h 18m
United Airlines
Wed 5/816:27
SFO
-
SEA
Nonstop2h 20m
United Airlines
Deal found 2/7$274
Tue 28/708:45
SEA
-
SFO
Nonstop2h 18m
United Airlines
Sat 1/820:54
SFO
-
SEA
Nonstop2h 25m
United Airlines
Deal found 1/7$275
Wed 29/707:03
SEA
-
SFO
Nonstop2h 17m
Alaska Airlines
Wed 5/806:03
SFO
-
SEA
Nonstop2h 10m
Alaska Airlines
Deal found 1/7$278

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 5 July 2026.

Round-trip from

$255

One-way from

$128

Popular in

June

Cheapest in

January

Average price

$409

Good one-way deal

$218 or less
Southwest
  • Southwest
  • 19/8-26/8
  • 2 total stops
  • 12h 45m total
  • Seattle to San Francisco
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Southwest
  • Southwest
  • 5/8
  • 1 total stop
  • 5h 35m total
  • Seattle to San Francisco
Search Deals
Highest demand for flights based on searches. 10% potential increase in price ($66 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($10 potential savings vs. average return price).
Search Deals
Average for round-trip flights in July 2026
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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 647,157 searches. Data last updated 5 July 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

Wed 19/8

07:10-13:15

1 stop6h 05m

San Francisco

Wed 26/8

16:45-23:25

1 stop6h 40m

$255

SeattleSan Francisco

SEA - SFO

SEASFO

Seattle/Tacoma Intl

Sat 22/8

10:50-18:20

1 stop7h 30m

San Francisco

Wed 26/8

16:45-23:25

1 stop6h 40m

$255

SeattleSan Francisco

SEA - SFO

SEASFO

Seattle/Tacoma Intl

Wed 23/9

09:25-17:00

2 stops7h 35m

San Francisco

Sat 26/9

05:00-12:55

1 stop7h 55m

$262

SeattleSan Francisco

SEA - SFO

SEASFO

Seattle/Tacoma Intl

Mon 9/11

21:25-23:41

Nonstop2h 16m

San Francisco

Mon 16/11

16:45-19:05

Nonstop2h 20m

$298

SeattleSan Francisco

SEA - SFO

SEASFO

Seattle/Tacoma Intl

Sat 15/8

05:00-12:05

1 stop7h 05m

San Francisco

Mon 17/8

11:30-18:50

2 stops7h 20m

$298

SeattleSan Francisco

SEA - SFO

SEASFO

Seattle/Tacoma Intl

Tue 29/9

08:41-10:59

Nonstop2h 18m

San Francisco

Wed 30/9

15:03-18:51

1 stop3h 48m

$350
Fastest return journey

SeattleSan Francisco

SEA - SFO

SEASFO

Seattle/Tacoma Intl

Tue 21/7

19:42-21:54

Nonstop2h 12m

San Francisco

Thu 23/7

06:03-08:13

Nonstop2h 10m

$360
Cheapest one-way

SeattleSan Francisco

SEA - SFO

SEASFO

Seattle/Tacoma Intl

Thu 6/8

14:35-20:35

1 stop6h 00m

$164

SeattleSan Francisco

SEA - SFO

SEASFO

Seattle/Tacoma Intl

Mon 14/9

09:10-14:40

1 stop5h 30m

$164

SeattleSan Francisco

SEA - SFO

SEASFO

Seattle/Tacoma Intl

Thu 13/8

09:10-16:30

1 stop7h 20m

$164

Flights are sorted by cheapest return flights first.

Deals found on 1/7

Showing 1-10 of 18 resultsSorted by cheapest first
1
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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?

Booking 90 days in advance of your planned departure date is, on average, the best time to get cheap flights from Seattle to San Francisco. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

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 $269). Flying from Seattle to San Francisco in June is currently the most expensive (average of $454). 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 5 July 2026.

One of the essential ways to save on airfare from Seattle to San Francisco is to remain as flexible as possible. Flights that are at midday tend to be the most expensive. A flight in the morning could potentially save you up to 69% on airfare.

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

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.

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

    This flight path from Seattle/Tacoma Intl to San Francisco was viewed by 31 users in the past month. Keep an eye out for changes in search interest prior to high and low season.

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

    For as low as $255, Southwest can have you in San Francisco from Seattle in 6h 05m. Airlines will cover a distance of 1093 km.

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

    The top 3 most reliable airlines when flying from Seattle to San Francisco are WestJet (69%), Aeromexico (64%) and SkyWest Airlines (56%).

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

    Looking for the cheapest flight from Seattle to San Francisco? While on average our users pay $386, our data indicates the cheapest price to be $174. The most popular route (Seattle/Tacoma Intl - San Francisco), is priced around $226.

  • 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 $269). Flying from Seattle to San Francisco in June is currently the most expensive (average of $454). 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
Sausalito
Davis
Milpitas
Vallejo

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Fly with Cheapflights

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

When you search for this flight from Seattle to San Francisco, Cheapflights searches on 900+ travel sites to save you time finding great flight deals online. Additionally, we offer filter features so you can choose a preferred cabin class or airline, see different price ranges, and much more so you can book the flight for you.

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

Millions of users choose and trust Cheapflights to book the best flight deals from Seattle to San Francisco for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.

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

Certainly. Search results for flights to San Francisco from Seattle shown to you on Cheapflights can be narrowed down with different useful search filters, which includes flexible booking options.

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

Not ready to book yet? You can track prices for flights from Seattle to San Francisco on Cheapflights with our Price Alert feature and get notified when better prices are available.

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