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Cheap flights from San Francisco to Seattle from £74

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 11/8. Fares are subject to change and may not be available on all flights or dates of travel.
SFO — SEA
6 Aug — 13 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 October, booked 71 days in advance, depart on a Wednesday or Tuesday and return on a Thursday

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 7 July 2026.

Sat 8/820:28
SFO
-
SEA
Nonstop2h 13m
Alaska Airlines
Thu 13/817:36
SEA
-
SFO
Nonstop2h 16m
Alaska Airlines
Deal found 2/7£136
Tue 28/717:20
SFO
-
SEA
2 stops7h 25m
Southwest
Tue 4/809:25
SEA
-
SFO
2 stops7h 35m
Southwest
Deal found 2/7£137
Thu 27/814:00
SFO
-
SEA
1 stop5h 35m
Southwest
Tue 1/908:30
SEA
-
SFO
1 stop8h 25m
Southwest
Deal found 6/7£139
Sat 8/806:00
SFO
-
SEA
2 stops7h 40m
Southwest
Wed 26/805:55
SEA
-
SFO
2 stops8h 10m
Southwest
Deal found 2/7£140
Sat 15/806:00
SFO
-
SEA
2 stops12h 20m
Southwest
Sat 22/805:30
SEA
-
SFO
1 stop6h 05m
Southwest
Deal found 2/7£141
Sat 25/720:54
SFO
-
SEA
Nonstop2h 25m
United Airlines
Tue 28/708:45
SEA
-
SFO
Nonstop2h 18m
United Airlines
Deal found 2/7£142
Fri 11/909:55
SFO
-
SEA
2 stops8h 55m
Southwest
Mon 14/909:10
SEA
-
SFO
1 stop5h 30m
Southwest
Deal found 6/7£143
Wed 30/907:40
SFO
-
SEA
2 stops12h 35m
Southwest
Sat 31/1007:35
SEA
-
SFO
2 stops7h 00m
Southwest
Deal found 2/7£144
Sat 25/717:29
SFO
-
SEA
Nonstop2h 15m
Delta
Tue 18/821:40
SEA
-
SFO
Nonstop2h 19m
Delta
Deal found 2/7£147
Thu 10/909:55
SFO
-
SEA
2 stops8h 55m
Southwest
Tue 15/908:30
SEA
-
SFO
1 stop5h 35m
Southwest
Deal found 6/7£150
Sat 22/806:10
SFO
-
SEA
1 stop8h 10m
Southwest
Mon 24/809:10
SEA
-
SFO
1 stop5h 30m
Southwest
Deal found 2/7£151

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 7 July 2026.

Round-trip from

£136

One-way from

£74

Popular in

June

Cheapest in

February

Average price

£252

Good round-trip deal

£244 or less

Good one-way deal

£117 or less
Alaska Airlines
  • Alaska Airlines
  • 8/8-11/8
  • Nonstop
  • 4h 22m total
  • San Francisco to Seattle
Search Deals
Southwest
  • Southwest
  • 11/8
  • 2 total stops
  • 7h 05m total
  • San Francisco to Seattle
Search Deals
Highest demand for flights based on searches. 13% potential increase in price (£25 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease (£3 potential savings vs. average return price).
Search Deals
Average for round-trip flights in July 2026
Search Deals
Price to beat on a round-trip flight from San Francisco to Seattle/Tacoma Intl.
Search Deals
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 858,174 searches. Data last updated 7 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

Sat 5/9

11:35-19:35

1 stop8h 00m

Seattle/Tacoma Intl

Wed 9/9

11:40-19:15

2 stops7h 35m

£136

San FranciscoSeattle

SFO - SEA

SFOSEA

San Francisco

Sat 15/8

06:00-18:20

2 stops12h 20m

Seattle/Tacoma Intl

Sat 22/8

05:30-11:35

1 stop6h 05m

£141

San FranciscoSeattle

SFO - SEA

SFOSEA

San Francisco

Sat 19/9

17:38-20:01

Nonstop2h 23m

Seattle/Tacoma Intl

Mon 21/9

21:30-23:51

Nonstop2h 21m

£155

San FranciscoSeattle

SFO - SEA

SFOSEA

San Francisco

Sat 22/8

17:05-22:55

1 stop5h 50m

Seattle/Tacoma Intl

Wed 26/8

11:40-18:15

1 stop6h 35m

£179

San FranciscoSeattle

SFO - SEA

SFOSEA

San Francisco

Thu 20/8

12:30-22:55

2 stops10h 25m

Seattle/Tacoma Intl

Mon 24/8

05:30-13:30

2 stops8h 00m

£186

San FranciscoSeattle

SFO - SEA

SFOSEA

San Francisco

Wed 26/8

09:35-21:15

2 stops11h 40m

Seattle/Tacoma Intl

Sun 30/8

07:10-15:00

2 stops7h 50m

£192
Fastest return journey

San FranciscoSeattle

SFO - SEA

SFOSEA

San Francisco

Thu 13/8

06:20-08:31

Nonstop2h 11m

Seattle/Tacoma Intl

Mon 17/8

07:20-09:36

Nonstop2h 16m

£197

San FranciscoSeattle

SFO - SEA

SFOSEA

San Francisco

Wed 19/8

10:40-20:15

2 stops9h 35m

Seattle/Tacoma Intl

Wed 26/8

11:40-19:05

2 stops7h 25m

£200
Cheapest one-way
Fastest single journey

San FranciscoSeattle

SFO - SEA

SFOSEA

San Francisco

Thu 20/8

06:20-08:31

Nonstop2h 11m

£78

San FranciscoSeattle

SFO - SEA

SFOSEA

San Francisco

Wed 16/9

12:22-19:39

1 stop7h 17m

£97

Flights are sorted by cheapest return flights first.

Deals found on 3/7

Showing 1-10 of 19 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 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 70 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 £157). Flying from San Francisco to Seattle in June is currently the most expensive (average of £255). 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 7 July 2026.

A simple way to save on the total cost of your ticket is to fly from San Francisco to Seattle in the morning. If you’re flexible enough to do this you can expect to save up to 48% on your trip compared to booking a flight in the evening.

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

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 7 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
12,631 reviews
Check prices

Comfort

7.8

Food

7.0

Boarding

8.1

Overall

7.9

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
12,631 reviews
Alaska Airlines
7.9
Good
12,631 reviews
Check prices

Comfort

7.8

Food

7.0

Boarding

8.1

Overall

7.9

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?

    If you book a flight from San Francisco to Seattle, you will be flying from San Francisco to Seattle/Tacoma Intl. Flights to Seattle/Tacoma Intl (SEA) from San Francisco (SFO) take 2h 10m for a nonstop flight. There are 65 flights from San Francisco to Seattle per day from 1 airline.

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

    Flights from San Francisco to Seattle/Tacoma Intl have been viewed 16 times in the past calendar month.

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

    Southwest and Delta can get you from San Francisco to Seattle in just under 2h 23m. Your travel time can differ by up to 9h 57m. Airlines will cover a distance of 679 mi. Both multi-stop and direct flights can be found to your destination and back.

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

    Currently priced at £112, Alaska Airlines will fly you from San Francisco to Seattle and back. In addition to Alaska Airlines, many other airlines offer competitively priced options for your trip. Alaska Airlines is priced at 48% lower than the current average price of a flight leaving 3 months from now.

  • What are the cheapest airlines to fly from San Francisco to Seattle one-way?

    The cheapet airlines for a one-way flight from San Francisco to Seattle are Delta (£44), Alaska Airlines (£54), and Frontier (£137).

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

    Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from San Francisco to Seattle on time: Aeromexico (91%), Qantas Airways (81%), WestJet (81%).

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

    Looking at all options, your cheapest flight can be booked for £93. While the most popular route (San Francisco - Seattle/Tacoma Intl) can be booked for £155 on average, our data indicates £192 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 £157). Flying from San Francisco to Seattle in June is currently the most expensive (average of £255). 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
Tacoma
Federal Way
SeaTac

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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
San Diego to Seattle flights
San Diego to Portland flights
San Jose to Seattle 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 858,174 searches. Data last updated 7 July 2026.
AirlineCheapestAverageFlexibilityOn-time
Alaska AirlinesCheapest£112Average£246FlexibilityNo cancel feeOn-time75%
Search Alaska Airlines flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers 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?

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 taps into our reliable network of hundreds of airlines and travel agencies to find the best deals for flights from San Francisco to Seattle for you. Better yet — we are completely free to use.

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

Cheapflights does show flights with no change fees to all users. To see these options for flights from San Francisco to Seattle, users can toggle the no change fees filter when performing a flight search.

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

Of course! You can now track prices for flights from San Francisco to Seattle and get an alert from Cheapflights when they change. Have a valid email address ready and click the bell icon next to the flight deals above to set up your price alerts.

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