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Cheap flights from San Francisco to Seattle from C$ 125

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 19/8. Fares are subject to change and may not be available on all flights or dates of travel.
SFO — SEA
24 Aug — 31 Aug1
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 71 days in advance, depart on a Monday or Thursday and return on a Friday

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 25 July 2026.

Sat 5/95:05 p.m.
SFO
-
SEA
1 stop5h 50m
Southwest
Tue 8/98:30 a.m.
SEA
-
SFO
1 stop8h 25m
Southwest
Deal found 22/7C$ 235
Sat 3/107:40 a.m.
SFO
-
SEA
1 stop12h 20m
Southwest
Wed 7/1012:05 p.m.
SEA
-
SFO
2 stops8h 55m
Southwest
Deal found 19/7C$ 237
Tue 11/81:55 p.m.
SFO
-
SEA
Nonstop2h 19m
United Airlines
Sat 15/87:00 a.m.
SEA
-
SFO
Nonstop2h 17m
United Airlines
Deal found 21/7C$ 238
Wed 9/910:40 a.m.
SFO
-
SEA
2 stops9h 35m
Southwest
Wed 16/98:30 a.m.
SEA
-
SFO
1 stop5h 35m
Southwest
Deal found 21/7C$ 242
Fri 11/96:00 a.m.
SFO
-
SEA
Nonstop2h 08m
Alaska Airlines
Sun 13/97:18 a.m.
SEA
-
SFO
Nonstop2h 19m
Alaska Airlines
Deal found 23/7C$ 245
Sat 12/91:55 p.m.
SFO
-
SEA
Nonstop2h 19m
United Airlines
Mon 14/99:00 a.m.
SEA
-
SFO
Nonstop2h 19m
United Airlines
Deal found 22/7C$ 246
Sat 29/86:20 a.m.
SFO
-
SEA
Nonstop2h 11m
Delta
Thu 3/99:30 p.m.
SEA
-
SFO
Nonstop2h 20m
Delta
Deal found 22/7C$ 249
Thu 5/112:30 p.m.
SFO
-
SEA
2 stops10h 10m
Southwest
Mon 9/116:45 a.m.
SEA
-
SFO
1 stop4h 45m
Southwest
Deal found 23/7C$ 251
Wed 2/96:00 a.m.
SFO
-
SEA
Nonstop2h 08m
Alaska Airlines
Tue 8/910:13 a.m.
SEA
-
SFO
1 stop5h 46m
Alaska Airlines
Deal found 21/7C$ 254
Sat 12/911:35 a.m.
SFO
-
SEA
1 stop8h 00m
Southwest
Mon 14/95:30 a.m.
SEA
-
SFO
2 stops8h 00m
Southwest
Deal found 22/7C$ 256
Mon 7/97:00 a.m.
SFO
-
SEA
1 stop10h 00m
Southwest
Sat 12/911:35 a.m.
SEA
-
SFO
2 stops6h 20m
Southwest
Deal found 23/7C$ 258
Wed 12/89:00 a.m.
SFO
-
SEA
Nonstop2h 26m
United Airlines
Sat 15/87:00 a.m.
SEA
-
SFO
Nonstop2h 17m
United Airlines
Deal found 22/7C$ 261

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 25 July 2026.

Round-trip from

C$ 235

One-way from

C$ 125

Popular in

July

Cheapest in

February

Average price

C$ 486

Good one-way deal

C$ 355 or less
Southwest
  • Southwest
  • 5/9-8/9
  • 2 total stops
  • 14h 15m total
  • San Francisco to Seattle
Search Deals
Southwest
  • Southwest
  • 19/8
  • 1 total stop
  • 6h 50m total
  • San Francisco to Seattle
Search Deals
Highest demand for flights based on searches. 12% potential increase in price (C$ 78 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease (C$ 11 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 2026
Search Deals
Price to beat on a one-way flight from San Francisco to Seattle/Tacoma Intl.
Search Deals

Cheapflights Fare Finder

 
Customize 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 629,999 searches. Data last updated 25 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 round-trip

San FranciscoSeattle

SFO - SEA

SFOSEA

San Francisco

Sat 19/9

6:10 a.m.-2:20 p.m.

1 stop8h 10m

Seattle/Tacoma Intl

Mon 21/9

9:10 a.m.-2:40 p.m.

1 stop5h 30m

C$ 249

San FranciscoSeattle

SFO - SEA

SFOSEA

San Francisco

Wed 16/9

3:05 p.m.-9:00 p.m.

1 stop5h 55m

Seattle/Tacoma Intl

Fri 18/9

1:55 p.m.-10:50 p.m.

1 stop8h 55m

C$ 256

San FranciscoSeattle

SFO - SEA

SFOSEA

San Francisco

Fri 11/9

5:16 p.m.-10:25 a.m.

1 stop17h 09m

Seattle/Tacoma Intl

Tue 15/9

3:45 p.m.-6:00 p.m.

Nonstop2h 15m

C$ 268

San FranciscoSeattle

SFO - SEA

SFOSEA

San Francisco

Fri 28/8

12:30 p.m.-10:55 p.m.

2 stops10h 25m

Seattle/Tacoma Intl

Tue 1/9

11:40 a.m.-7:15 p.m.

2 stops7h 35m

C$ 277

San FranciscoSeattle

SFO - SEA

SFOSEA

San Francisco

Fri 11/9

12:30 p.m.-7:35 p.m.

1 stop7h 05m

Seattle/Tacoma Intl

Sun 13/9

9:05 a.m.-3:05 p.m.

1 stop6h 00m

C$ 277

San FranciscoSeattle

SFO - SEA

SFOSEA

San Francisco

Fri 21/8

5:05 p.m.-12:40 a.m.

2 stops7h 35m

Seattle/Tacoma Intl

Mon 24/8

9:10 a.m.-4:30 p.m.

1 stop7h 20m

C$ 285
Quickest round-trip

San FranciscoSeattle

SFO - SEA

SFOSEA

San Francisco

Thu 3/9

6:20 a.m.-8:31 a.m.

Nonstop2h 11m

Seattle/Tacoma Intl

Fri 11/9

9:30 p.m.-11:51 p.m.

Nonstop2h 21m

C$ 299

San FranciscoSeattle

SFO - SEA

SFOSEA

San Francisco

Fri 11/9

7:08 a.m.-7:52 p.m.

1 stop12h 44m

Seattle/Tacoma Intl

Sun 13/9

7:18 a.m.-9:37 a.m.

Nonstop2h 19m

C$ 331

San FranciscoSeattle

SFO - SEA

SFOSEA

San Francisco

Thu 3/9

8:25 a.m.-7:52 p.m.

1 stop11h 27m

Seattle/Tacoma Intl

Sun 6/9

7:18 a.m.-9:37 a.m.

Nonstop2h 19m

C$ 331
Cheapest one-way

San FranciscoSeattle

SFO - SEA

SFOSEA

San Francisco

Sat 15/8

5:00 a.m.-3:55 p.m.

1 stop10h 55m

C$ 132

Flights are sorted by cheapest round-trip flights first.

Deals found on 24/7

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

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 round-trip 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?

The price you pay for your flight from San Francisco to Seattle may vary depending on when you book. For the best chance of a lower fare, look to book 50 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

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 C$ 296). Flying from San Francisco to Seattle in July is currently the most expensive (average of C$ 487). 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 25 July 2026.

It’s typically best to fly out from San Francisco to Seattle in the morning. Doing so could potentially save you 50% on the flight price compared to flying in the afternoon, which is usually more expensive.

How much does it cost to fly round-trip from San Francisco to Seattle?

Airfare is below average for this route at the moment.

San Francisco to Seattle flights typically cost between C$ 341 and C$ 575 in September.
The cheapest round-trip price found within the last 5 days was C$ 235 on Southwest (5 Sep-8 Sep).

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 25 July 2026.
Check out reviews from past customers who have flown with Alaska Airlines from San Francisco to Seattle to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
7.9
Good
12,705 reviews
Check prices

Comfort

7.8

Food

7.0

Overall

7.9

Boarding

8.1

Crew

8.5

Entertainment

7.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Dec 2025

SJC - SEA

The flight was great. Don’t have to make it better. Everything was OK.
Alaska Airlines
7.9
Good
12,705 reviews
Alaska Airlines
7.9
Good
12,705 reviews
Check prices

Comfort

7.8

Food

7.0

Overall

7.9

Boarding

8.1

Crew

8.5

Entertainment

7.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Dec 2025

SJC - SEA

The flight was great. Don’t have to make it better. Everything was OK.

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?

    Booking a flight from San Francisco (SFO) to Seattle/Tacoma Intl (SEA) is your only option if you wish to fly from San Francisco to Seattle. On a typical day, there are 73 flights from San Francisco to Seattle/Tacoma Intl, all of which are around 2h 10m for a nonstop flight. You can also purchase a plane ticket from 1 airline when you book a flight from San Francisco to Seattle.

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

    This flight path from San Francisco to Seattle/Tacoma Intl was viewed by 10 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 San Francisco to Seattle?

    Southwest, United Airlines, and Alaska Airlines can get you from San Francisco to Seattle in just under 2h 08m. Your travel time can differ by up to 3h 42m. San Francisco and Seattle are separated by a distance of 1093 km. This flight may include one or multiple stops.

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

    Cheapflights users have booked flights from San Francisco to Seattle round-trip from C$ 292. Alaska Airlines is priced at 28% lower than the current average price of a flight leaving 3 months from now.

  • 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 for the cheapest flight from San Francisco to Seattle? While on average our users pay C$ 382, our data indicates the cheapest price to be C$ 74. The most popular route (San Francisco - Seattle/Tacoma Intl), is priced around C$ 214.

  • 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 vacation 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 C$ 296). Flying from San Francisco to Seattle in July is currently the most expensive (average of C$ 487). 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
Kent
Leavenworth
Mukilteo
Tacoma
Renton
Cashmere
Lynnwood
Ellensburg
Tukwila
Olympia
Marysville
Federal Way
Kirkland

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

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 629,999 searches. Data last updated 25 July 2026.
AirlineCheapestAverageFlexibilityOn-time
Alaska AirlinesCheapestC$ 292AverageC$ 366FlexibilityNo cancel feeOn-time75%
Search Alaska Airlines flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travelers can enjoy low prices and a wide availability of flights to their desired destinations.

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

Deals for San Francisco to Seattle flights are sourced from 900+ travel sites when you use Cheapflights. When all flight results come back, Cheapflights lets you sort and filter flights using different criteria to choose better, like price, airport, cabin class, and plenty of other options.

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?

Need flexible booking options for your flight to Seattle from San Francisco? Don’t worry, Cheapflights have you covered. Use our search filter to only show flights with no change fees.

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

Yes! Start tracking prices for San Francisco to Seattle flights today and get alerted whenever prices for these flights change. To access this feature, click the bell icon next to the flight deals above, which will prompt you for a valid email address to receive your alerts.

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