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Cheap flights from San Francisco to Seattle from $135

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 28/8. Fares are subject to change and may not be available on all flights or dates of travel.
SFO — SEA
29 Aug — 5 Sep1
1 adult
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from San Francisco to Seattle/Tacoma Intl are usually found in February or January, booked 51 days in advance, depart on a Tuesday or Wednesday and return on a Monday

Cheap flight deals from San Francisco to Seattle

Enter your travel dates to find the best prices.

Cheapest flights from San Francisco to Seattle
Explore the most affordable flight options available from San Francisco to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 30 July 2026.

Sat 29/810:36
SFO
-
SEA
Nonstop2h 11m
Delta
Mon 31/807:20
SEA
-
SFO
Nonstop2h 16m
Delta
Deal found 29/7$239
Wed 9/910:29
SFO
-
SEA
Nonstop2h 15m
Delta
Tue 15/917:51
SEA
-
SFO
Nonstop2h 27m
Delta
Deal found 29/7$240
Sat 29/811:20
SFO
-
SEA
2 stops7h 35m
Southwest
Mon 31/809:10
SEA
-
SFO
1 stop5h 30m
Southwest
Deal found 29/7$243
Wed 2/907:08
SFO
-
SEA
1 stop5h 31m
Alaska Airlines
Wed 9/908:41
SEA
-
SFO
Nonstop2h 18m
Alaska Airlines
Deal found 29/7$245
Sat 19/911:20
SFO
-
SEA
2 stops7h 40m
Southwest
Tue 22/908:30
SEA
-
SFO
1 stop8h 25m
Southwest
Deal found 26/7$248
Wed 26/809:35
SFO
-
SEA
2 stops10h 40m
Southwest
Tue 15/909:25
SEA
-
SFO
2 stops7h 40m
Southwest
Deal found 29/7$250
Thu 27/813:55
SFO
-
SEA
Nonstop2h 19m
United Airlines
Wed 2/919:35
SEA
-
SFO
Nonstop2h 22m
United Airlines
Deal found 28/7$253
Wed 19/817:36
SFO
-
SEA
Nonstop2h 19m
Delta
Tue 25/810:35
SEA
-
SFO
Nonstop2h 22m
Delta
Deal found 29/7$255
Tue 22/1206:05
SFO
-
SEA
Nonstop2h 20m
Delta
Tue 29/1221:25
SEA
-
SFO
Nonstop2h 14m
Delta
Deal found 28/7$256
Fri 28/812:30
SFO
-
SEA
2 stops10h 25m
Southwest
Wed 2/911:10
SEA
-
SFO
1 stop6h 10m
Southwest
Deal found 28/7$258
Mon 24/813:55
SFO
-
SEA
Nonstop2h 19m
United Airlines
Mon 31/810:55
SEA
-
SFO
Nonstop2h 20m
United Airlines
Deal found 27/7$259

Find flight deals from San Francisco to Seattle

Discover tips and strategies to find the most affordable flight options for your journey from San Francisco (SFO) to Seattle (SEA). 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 30 July 2026.

Round-trip from

$239

One-way from

$135

Popular in

July

Cheapest in

February

Average price

$498

Good one-way deal

$271 or less
Delta
  • Delta
  • 29/8-31/8
  • Nonstop
  • 4h 27m total
  • San Francisco to Seattle
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Southwest
  • Southwest
  • 17/9
  • 2 total stops
  • 7h 25m total
  • San Francisco to Seattle
Search Deals
Highest demand for flights based on searches. 11% potential increase in price ($79 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($12 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 San Francisco to Seattle/Tacoma Intl.
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from San Francisco to Seattle 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 30 July 2026.
Use the filters below to find and compare flights from San Francisco to Seattle that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

San FranciscoSeattle

SFO - SEA

SFOSEA

San Francisco

Sun 6/9

20:53-23:10

Nonstop2h 17m

Seattle/Tacoma Intl

Thu 10/9

20:30-22:45

Nonstop2h 15m

$240

San FranciscoSeattle

SFO - SEA

SFOSEA

San Francisco

Tue 1/9

05:40-12:05

1 stop6h 25m

Seattle/Tacoma Intl

Tue 1/9

13:45-21:40

1 stop7h 55m

$240

San FranciscoSeattle

SFO - SEA

SFOSEA

San Francisco

Sat 19/9

17:05-23:00

1 stop5h 55m

Seattle/Tacoma Intl

Tue 22/9

08:30-14:05

1 stop5h 35m

$240

San FranciscoSeattle

SFO - SEA

SFOSEA

San Francisco

Sat 29/8

11:20-18:55

2 stops7h 35m

Seattle/Tacoma Intl

Mon 31/8

09:10-14:40

1 stop5h 30m

$243

San FranciscoSeattle

SFO - SEA

SFOSEA

San Francisco

Sat 19/9

06:10-14:20

1 stop8h 10m

Seattle/Tacoma Intl

Mon 21/9

09:05-14:40

1 stop5h 35m

$248
Fastest return journey

San FranciscoSeattle

SFO - SEA

SFOSEA

San Francisco

Tue 25/8

10:40-12:51

Nonstop2h 11m

Seattle/Tacoma Intl

Fri 4/9

07:20-09:36

Nonstop2h 16m

$255

San FranciscoSeattle

SFO - SEA

SFOSEA

San Francisco

Sat 22/8

18:25-20:43

Nonstop2h 18m

Seattle/Tacoma Intl

Mon 24/8

17:20-19:42

Nonstop2h 22m

$259

San FranciscoSeattle

SFO - SEA

SFOSEA

San Francisco

Mon 17/8

14:50-00:20

1 stop9h 30m

Seattle/Tacoma Intl

Wed 19/8

09:25-17:00

2 stops7h 35m

$271

San FranciscoSeattle

SFO - SEA

SFOSEA

San Francisco

Tue 25/8

09:35-21:15

2 stops11h 40m

Seattle/Tacoma Intl

Fri 4/9

15:45-22:55

1 stop7h 10m

$283
Cheapest one-way

San FranciscoSeattle

SFO - SEA

SFOSEA

San Francisco

Fri 28/8

20:59-23:19

Nonstop2h 20m

$135

Flights are sorted by cheapest return flights first.

Deals found on 29/7

Showing 1-10 of 18 resultsSorted by cheapest first
1
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Best time to book a flight from San Francisco to Seattle

Have a flexible travel schedule? Discover the best time to fly to Seattle from San Francisco 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 San Francisco to Seattle

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

To ensure you get the cheapest price possible for a flight from San Francisco to Seattle, you should look to book at least 50 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

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

Currently, February is the cheapest month in which you can book a flight from San Francisco to Seattle (average of $302). Flying from San Francisco to Seattle in July is currently the most expensive (average of $498). 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 SFO to SEA?

Find hourly flight availability from San Francisco to Seattle. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 30 July 2026.

It’s typically best to fly out from San Francisco to Seattle at midday. Doing so could potentially save you 75% on the flight price compared to flying in the afternoon, which is usually more expensive.

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

Airfare is below average for this route at the moment.

San Francisco to Seattle flights typically cost between $308 and $542 in August.
The cheapest return price found within the last 5 days was $239 on Delta (29 Aug–31 Aug).

Related info for your journey

Find useful and relevant information for your journey from San Francisco to Seattle. 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 San Francisco to Seattle flight route?

    Flights from San Francisco to Seattle/Tacoma Intl have been viewed 8 times in the past calendar month.

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

    Departing from San Francisco to Seattle will take you 2h 08m. Airlines will cover a distance of 1093 km. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

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

    No one likes to see their flight delayed. When booking a flight from San Francisco to Seattle consider choosing WestJet(86%), Aeromexico(81%) or China Eastern(77%), as they are the most reliable in getting you off to your destination on time.

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

    Looking at all options, your cheapest flight can be booked for $237. While the most popular route (San Francisco - Seattle/Tacoma Intl) can be booked for $217 on average, our data indicates $322 when flying from San Francisco to Seattle.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from San Francisco to Seattle 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 San Francisco to Seattle?

    Currently, February is the cheapest month in which you can book a flight from San Francisco to Seattle (average of $302). Flying from San Francisco to Seattle in July is currently the most expensive (average of $498). 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 Seattle?

Book flights to Seattle if you plan to visit one of these locations
SeaTac
Ocean Shores
Tukwila

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Alternative routes for San Francisco to Seattle

See prices for flight routes from nearby airports that may be better suited for you.
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Fly with Cheapflights

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

900+ travel sites are searched through when a user searches for a flight using Cheapflights. From the search interface, users can use filters to choose airlines, airports, flight times, cabin classes and more to their preference. Book your flight to Seattle from San Francisco today with Cheapflights!

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

Cheapflights helps you find that perfect flight to Seattle from San Francisco 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 San Francisco to Seattle with no change fees?

Certainly. Search results for flights to Seattle from San Francisco 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 San Francisco to Seattle become cheaper?

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

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