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Cheap flights from San Francisco to Seattle from $114

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 5/11. Fares are subject to change and may not be available on all flights or dates of travel.
SFO — SEA
18 Oct — 25 Oct1
1 adult
1 adult, Economy

Cheapflights Tip: The best prices from San Francisco to Seattle/Tacoma Intl are usually found in October or January, booked 75 days in advance, depart on a Friday or Wednesday and return on a Saturday

Cheap 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 18 September 2025.

Round-trip from

$211

One-way from

$114

Popular in

July

Cheapest in

October

Average price

$396

Good round-trip deal

$452 or less

Good one-way deal

$111 or less
Alaska Airlines
  • Alaska Airlines
  • 15/10-15/10
  • 1 total stop
  • 6h 41m total
  • San Francisco to Seattle
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Southwest
  • Southwest
  • 5/11
  • 1 total stop
  • 6h 25m total
  • San Francisco to Seattle
Search Deals
Highest demand for flights based on searches. 7% potential increase in price ($43 potential increase over avg. return price).
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Cheapest flight prices on average. 1% potential price decrease ($8 potential savings vs. average return price).
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Average for round-trip flights in September 2025
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Price to beat on a round-trip flight from San Francisco to Seattle/Tacoma Intl.
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Price to beat on a one-way flight from San Francisco to Seattle/Tacoma Intl.
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Find flight deals from San Francisco to Seattle

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 18 September 2025.

Wed 15/1008:20SFO - SEA
Nonstop2h 14mAlaska Airlines
Wed 15/1012:00SEA - SFO
1 stop4h 27mAlaska Airlines
Deal found 16/9$211
Sat 13/1218:20SFO - SEA
Nonstop2h 15mAlaska Airlines
Wed 7/112:50SEA - SFO
1 stop3h 48mAlaska Airlines
Deal found 17/9$220
Sat 1/1113:11SFO - SEA
1 stop5h 59mHawaiian Airlines
Sat 8/1115:50SEA - SFO
Nonstop2h 13mHawaiian Airlines
Deal found 17/9$223
Thu 30/1008:00SFO - SEA
Nonstop2h 20mAlaska Airlines
Thu 30/1013:31SEA - SFO
Nonstop2h 12mAlaska Airlines
Deal found 16/9$226
Sat 1/1106:00SFO - SEA
Nonstop2h 20mDelta
Sat 8/1117:00SEA - SFO
Nonstop2h 05mDelta
Deal found 16/9$229
Tue 7/1005:30SFO - SEA
1 stop6h 15mSouthwest
Wed 8/1017:00SEA - SFO
1 stop6h 05mSouthwest
Deal found 17/9$231
Sat 1/1121:55SFO - SEA
1 stop11h 23mFrontier
Sat 8/1112:58SEA - SFO
1 stop20h 35mFrontier
Deal found 17/9$232
Tue 16/1214:59SFO - SEA
1 stop3h 56mAlaska Airlines
Tue 6/109:57SEA - SFO
1 stop6h 28mAlaska Airlines
Deal found 16/9$234
Thu 18/1207:00SFO - SEA
Nonstop2h 17mAlaska Airlines
Sat 17/110:00SEA - SFO
1 stop6h 38mAlaska Airlines
Deal found 16/9$235
Tue 23/1206:12SFO - SEA
Nonstop2h 23mDelta
Tue 30/1221:42SEA - SFO
Nonstop2h 17mDelta
Deal found 16/9$237
Wed 22/1015:50SFO - SEA
1 stop7h 10mSouthwest
Sat 25/1007:45SEA - SFO
2 stops9h 00mSouthwest
Deal found 16/9$238
Sat 8/1105:15SFO - SEA
1 stop6h 05mSouthwest
Tue 11/1112:35SEA - SFO
2 stops7h 35mSouthwest
Deal found 16/9$243

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 18 September 2025.
Use the filters below to find and compare flights from San Francisco to Seattle that are best for you.

Fly from

San Francisco

Fly to

Seattle

Route

Depart

Return

Price

San FranciscoSeattle

SFO - SEA

SFOSEA

San Francisco

Thu 23/10

06:00-08:20

Nonstop2h 20m

Seattle/Tacoma Intl

Sun 26/10

07:25-09:55

Nonstop2h 30m

$220

San FranciscoSeattle

SFO - SEA

SFOSEA

San Francisco

Sat 8/11

19:37-22:00

Nonstop2h 23m

Seattle/Tacoma Intl

Tue 11/11

08:24-10:44

Nonstop2h 20m

$220

San FranciscoSeattle

SFO - SEA

SFOSEA

San Francisco

Sat 18/10

08:20-10:34

Nonstop2h 14m

Seattle/Tacoma Intl

Tue 21/10

15:46-18:01

Nonstop2h 15m

$220

San FranciscoSeattle

SFO - SEA

SFOSEA

San Francisco

Mon 13/10

06:00-08:20

Nonstop2h 20m

Seattle/Tacoma Intl

Sun 19/10

07:25-09:55

Nonstop2h 30m

$220

San FranciscoSeattle

SFO - SEA

SFOSEA

San Francisco

Thu 11/12

06:00-08:20

Nonstop2h 20m

Seattle/Tacoma Intl

Tue 6/1

10:55-13:17

Nonstop2h 22m

$220

San FranciscoSeattle

SFO - SEA

SFOSEA

San Francisco

Wed 5/11

16:45-19:00

Nonstop2h 15m

Seattle/Tacoma Intl

Mon 10/11

20:10-22:25

Nonstop2h 15m

$220

San FranciscoSeattle

SFO - SEA

SFOSEA

San Francisco

Thu 18/12

07:00-09:17

Nonstop2h 17m

Seattle/Tacoma Intl

Sat 10/1

05:30-08:49

1 stop3h 19m

$235

San FranciscoSeattle

SFO - SEA

SFOSEA

San Francisco

Mon 6/10

08:20-10:34

Nonstop2h 14m

Seattle/Tacoma Intl

Tue 7/10

07:00-09:16

Nonstop2h 16m

$235

San FranciscoSeattle

SFO - SEA

SFOSEA

San Francisco

Fri 12/12

19:25-21:43

Nonstop2h 18m

Seattle/Tacoma Intl

Sat 10/1

20:00-22:18

Nonstop2h 18m

$235

San FranciscoSeattle

SFO - SEA

SFOSEA

San Francisco

Sun 14/12

10:30-12:52

Nonstop2h 22m

Seattle/Tacoma Intl

Tue 16/12

13:37-15:57

Nonstop2h 20m

$235

Flights are sorted by cheapest return flights first.

Deals found on 17/9

Showing 1-10 of 22 results
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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?

Use this chart to determine the optimal time to book a return flight from San Francisco to Seattle. Price data was last updated on 12 September 2025.

To ensure you get the cheapest price possible for a flight from San Francisco to Seattle, you should look to book at least 40 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, March is the cheapest month in which you can book a flight from San Francisco to Seattle (average of $875). Flying from San Francisco to Seattle in December is currently the most expensive (average of $1,297). 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 18 September 2025.

It’s typically best to fly out from San Francisco to Seattle at midday. Doing so could potentially save you 59% on the flight price compared to flying in the afternoon, which is usually more expensive.

Reviews of airlines servicing Seattle

Get insights into the airlines that provide service to Seattle. 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 Seattle. Reviews last updated 18 September 2025.
See what other customers who have flown with Alaska Airlines from San Francisco to Seattle 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
10,000 reviews
Check prices

Boarding

8.1

Crew

8.5

Overall

8.0

Food

7.1

Comfort

7.8

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Aug 2025

MFR - SEA

Great smooth flight. Was hour and half late though. Don't know why
Alaska Airlines
8.0
Very Good
10,000 reviews
Alaska Airlines
8.0
Very Good
10,000 reviews
Check prices

Boarding

8.1

Crew

8.5

Overall

8.0

Food

7.1

Comfort

7.8

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Aug 2025

MFR - SEA

Great smooth flight. Was hour and half late though. Don't know why

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.

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

    You will need to book a flight from San Francisco to Seattle/Tacoma Intl if you want to fly from San Francisco to Seattle. At least 1 airline has flights from San Francisco (SFO) to Seattle/Tacoma Intl (SEA) on a regular basis. There are 86 flights to Seattle from the San Francisco airport per day. If you manage to book one that is nonstop, then you can expect the flight time from SFO to SEA to be around 2h 19m.

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

    Flights from San Francisco to Seattle/Tacoma Intl have been viewed 18 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 20m. 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 is the cheapest airline to fly from San Francisco to Seattle round-trip?

    Flying on Alaska Airlines is currently your cheapest option to Seattle, with prices starting at $220. Alaska Airlines is 38% cheaper than the average price of flights available within the next 90 days to this destination.

  • 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 Scandinavian Airlines(90%), Air China(88%) or WestJet(88%), 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 $96. While the most popular route (San Francisco - Seattle/Tacoma Intl) can be booked for $196 on average, our data indicates $349 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, March is the cheapest month in which you can book a flight from San Francisco to Seattle (average of $875). Flying from San Francisco to Seattle in December is currently the most expensive (average of $1,297). 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
Leavenworth
Ocean Shores

Browse thousands of different options on Cheapflights for your next trip

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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.
Los Angeles to Seattle flights
Los Angeles to Portland flights
San Francisco to Portland flights

Top airline flying from San Francisco to Seattle

Discover the top airline that operate flights from San Francisco to Seattle. 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 647,157 searches. Data last updated 18 September 2025.
AirlineCheapestAverageFlexibilityOn-time
Alaska AirlinesCheapest$220Average$287FlexibilityNo cancel feeOn-time75%
Search Alaska Airlines flights

Fly with Cheapflights

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

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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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