Find flights
Deals
When to book
Airlines
FAQs

Cheap flights from San Francisco to Seattle from C$ 109

SFO — SEA
6 Oct — 13 Oct1
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 October, booked 51 days in advance, depart on a Monday or Thursday and return on a Wednesday

Cheap flight deals from San Francisco to Seattle

Enter your travel dates to find the best prices.

Cheapest flights from San Francisco to Seattle

Thu 12/112:44 p.m. -
1 stop6h 45m
Sun 15/117:18 a.m. -
Nonstop2h 23m
Deal found 6/9C$ 208
Thu 15/101:45 p.m. -
1 stop7h 15m
Sat 17/105:25 a.m. -
1 stop6h 50m
Deal found 6/9C$ 209
Sat 3/101:51 p.m. -
Nonstop2h 13m
Sat 3/107:36 p.m. -
Nonstop2h 13m
Deal found 2/9C$ 210
Fri 2/108:59 p.m. -
Nonstop2h 15m
Fri 9/109:35 p.m. -
Nonstop2h 21m
Deal found 3/9C$ 213
Sat 31/1011:00 a.m. -
Nonstop2h 16m
Sat 7/113:58 p.m. -
1 stop5h 59m
Deal found 6/9C$ 214
Thu 1/1012:05 p.m. -
1 stop9h 00m
Sat 3/107:50 a.m. -
1 stop6h 45m
Deal found 5/9C$ 216
Wed 14/103:21 p.m. -
Nonstop2h 12m
Mon 19/109:36 p.m. -
Nonstop2h 16m
Deal found 2/9C$ 217
Thu 1/108:23 a.m. -
1 stop10h 28m
Sun 4/106:39 a.m. -
Nonstop2h 10m
Deal found 5/9C$ 221
Wed 14/1012:15 p.m. -
2 stops9h 30m
Sat 17/109:45 a.m. -
2 stops8h 00m
Deal found 6/9C$ 223
Thu 8/106:20 a.m. -
Nonstop2h 21m
Sun 11/109:35 p.m. -
Nonstop2h 21m
Deal found 4/9C$ 224
Sat 26/96:10 a.m. -
1 stop8h 10m
Tue 6/103:00 p.m. -
1 stop7h 50m
Deal found 5/9C$ 227
Mon 28/96:00 a.m. -
Nonstop2h 08m
Thu 1/107:18 a.m. -
Nonstop2h 19m
Deal found 6/9C$ 231

Find flight deals from San Francisco to Seattle

Round-trip from

C$ 208

One-way from

C$ 109

Popular in

July

Cheapest in

February

Average price

C$ 397

Good one-way deal

C$ 164 or less
Alaska Airlines
  • Alaska Airlines
  • 12/11-15/11
  • 1 total stop
  • 9h 08m total
  • San Francisco to Seattle
Search Deals
United Airlines
  • United Airlines
  • 28/10-31/12
  • Nonstop
  • 2h 16m total
  • San Francisco to Seattle
Search Deals
Highest demand for flights based on searches. 10% potential increase in price (C$ 65 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (C$ 11 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in September 2026
Search Deals
Price to beat on a one-way flight from San Francisco to Seattle/Tacoma Intl.
Search Deals

Cheapflights Fare Finder

 
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 San Francisco - SEA Seattle/Tacoma Intl

SFOSEA

San Francisco

Tue 20/10

2:15 p.m.-4:37 p.m.

Nonstop2h 22m

Seattle/Tacoma Intl

Wed 31/12

12:00 a.m.-12:00 a.m.

Nonstop0h 00m

C$ 109

San FranciscoSeattle

SFO San Francisco - SEA Seattle/Tacoma Intl

SFOSEA

San Francisco

Tue 13/10

12:15 p.m.-9:45 p.m.

2 stops9h 30m

Seattle/Tacoma Intl

Wed 31/12

12:00 a.m.-12:00 a.m.

Nonstop0h 00m

C$ 112

San FranciscoSeattle

SFO San Francisco - SEA Seattle/Tacoma Intl

SFOSEA

San Francisco

Mon 16/11

12:25 p.m.-9:30 p.m.

2 stops9h 05m

Seattle/Tacoma Intl

Wed 31/12

12:00 a.m.-12:00 a.m.

Nonstop0h 00m

C$ 130

San FranciscoSeattle

SFO San Francisco - SEA Seattle/Tacoma Intl

SFOSEA

San Francisco

Tue 20/10

6:45 a.m.-1:35 p.m.

2 stops6h 50m

Seattle/Tacoma Intl

Wed 31/12

12:00 a.m.-12:00 a.m.

Nonstop0h 00m

C$ 130

San FranciscoSeattle

SFO San Francisco - SEA Seattle/Tacoma Intl

SFOSEA

San Francisco

Thu 3/12

12:25 p.m.-9:30 p.m.

2 stops9h 05m

Seattle/Tacoma Intl

Wed 31/12

12:00 a.m.-12:00 a.m.

Nonstop0h 00m

C$ 130

San FranciscoSeattle

SFO San Francisco - SEA Seattle/Tacoma Intl

SFOSEA

San Francisco

Wed 23/9

12:05 p.m.-9:45 p.m.

2 stops9h 40m

Seattle/Tacoma Intl

Wed 31/12

12:00 a.m.-12:00 a.m.

Nonstop0h 00m

C$ 130

San FranciscoSeattle

SFO San Francisco - SEA Seattle/Tacoma Intl

SFOSEA

San Francisco

Thu 24/9

9:07 p.m.-11:26 p.m.

Nonstop2h 19m

Seattle/Tacoma Intl

Wed 31/12

12:00 a.m.-12:00 a.m.

Nonstop0h 00m

C$ 151

San FranciscoSeattle

SFO San Francisco - SEA Seattle/Tacoma Intl

SFOSEA

San Francisco

Fri 25/9

8:53 p.m.-11:10 p.m.

Nonstop2h 17m

Seattle/Tacoma Intl

Wed 31/12

12:00 a.m.-12:00 a.m.

Nonstop0h 00m

C$ 158

San FranciscoSeattle

SFO San Francisco - SEA Seattle/Tacoma Intl

SFOSEA

San Francisco

Thu 24/9

8:53 p.m.-11:10 p.m.

Nonstop2h 17m

Seattle/Tacoma Intl

Wed 31/12

12:00 a.m.-12:00 a.m.

Nonstop0h 00m

C$ 165
Quickest round-trip

San FranciscoSeattle

SFO San Francisco - SEA Seattle/Tacoma Intl

SFOSEA

San Francisco

Mon 28/9

6:00 a.m.-8:08 a.m.

Nonstop2h 08m

Seattle/Tacoma Intl

Wed 31/12

12:00 a.m.-12:00 a.m.

Nonstop0h 00m

C$ 169

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/9

Showing 1-10 of 24 resultsSorted by cheapest first
1
2
3

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

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$ 291). Flying from San Francisco to Seattle in July is currently the most expensive (average of C$ 479). 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?

It’s typically best to fly out from San Francisco to Seattle in the morning. Doing so could potentially save you 36% 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$ 271 and C$ 508 in November.
The cheapest round-trip price found within the last 5 days was C$ 208 on Alaska Airlines (12 Nov-15 Nov).

Reviews of airlines servicing Seattle

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
12,882 reviews
Check prices

Entertainment

7.0

Food

7.0

Boarding

8.1

Overall

7.9

Comfort

7.8

Crew

8.5

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
12,882 reviews
Alaska Airlines
7.9
Good
12,882 reviews
Check prices

Entertainment

7.0

Food

7.0

Boarding

8.1

Overall

7.9

Comfort

7.8

Crew

8.5

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

  • 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 51 flights from San Francisco to Seattle/Tacoma Intl, all of which are around 2h 08m 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 9 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 15m. Your travel time can differ by up to 3h 35m. 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$ 286. 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 (83%), Air China (82%) or SkyWest Airlines (76%) 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$ 320, our data indicates the cheapest price to be C$ 105. The most popular route (San Francisco - Seattle/Tacoma Intl), is priced around C$ 228.

  • 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$ 291). Flying from San Francisco to Seattle in July is currently the most expensive (average of C$ 479). 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
Mukilteo
Leavenworth
Tacoma
Renton
Cashmere
Lynnwood
Ellensburg
Tukwila
Olympia
Marysville
Federal Way
Kirkland

Browse thousands of different options on Cheapflights for your next trip

Top airline flying from San Francisco to Seattle

AirlineCheapestAverageFlexibilityOn-time
Alaska AirlinesCheapestC$ 286AverageC$ 359FlexibilityNo cancel feeOn-time75%
Search Alaska Airlines flights

Fly with Cheapflights

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.

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.