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Cheap flights from San Francisco to Seattle from £44

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 11/1. Fares are subject to change and may not be available on all flights or dates of travel.
SFO — SEA
20 Jan — 27 Jan1
1 adult
1 adult, Economy, 0 bags

Cheapflights Tip: The best prices from San Francisco to Seattle/Tacoma Intl are usually found in January or February, booked 64 days in advance, depart on a Thursday or Tuesday 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 21 December 2025.

Mon 22/1218:30SFO - SEA
Nonstop2h 20mDelta
Thu 22/111:30SEA - SFO
Nonstop2h 13mDelta
Deal found 19/12£267
Mon 22/1210:13SFO - SEA
Nonstop2h 17mAlaska Airlines
Thu 22/111:43SEA - SFO
Nonstop2h 17mAlaska Airlines
Deal found 19/12£274
Mon 22/1219:20SFO - SEA
1 stop5h 00mDelta
Fri 23/107:15SEA - SFO
Nonstop2h 20mDelta
Deal found 18/12£282
Wed 31/1207:45SFO - SEA
2 stops9h 10mAlaska Airlines
Wed 31/1219:23SEA - SFO
Nonstop2h 18mAlaska Airlines
Deal found 20/12£294
Mon 22/1221:55SFO - SEA
1 stop11h 25mSouthwest
Thu 22/109:55SEA - SFO
1 stop7h 10mSouthwest
Deal found 19/12£298
Wed 31/1210:46SFO - SEA
1 stop10h 44mAlaska Airlines
Fri 2/121:35SEA - SFO
Nonstop2h 19mAlaska Airlines
Deal found 19/12£327

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 21 December 2025.

Round-trip from

£90

One-way from

£44

Popular in

December

Cheapest in

January

Average price

£225

Good one-way deal

£107 or less
United Airlines
  • United Airlines
  • 15/1-16/1
  • Nonstop
  • 4h 42m total
  • San Francisco to Seattle
Search Deals
Delta
  • Delta
  • 11/1
  • Nonstop
  • 2h 20m total
  • San Francisco to Seattle
Search Deals
Highest demand for flights based on searches. 6% potential increase in price (£8 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (£4 potential savings vs. average return price).
Search Deals
Average for round-trip flights in December 2025
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 21 December 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 19/3

07:00-09:10

Nonstop2h 10m

Seattle/Tacoma Intl

Tue 24/3

08:05-10:31

Nonstop2h 26m

£91

San FranciscoSeattle

SFO - SEA

SFOSEA

San Francisco

Sat 17/1

18:18-20:34

Nonstop2h 16m

Seattle/Tacoma Intl

Sat 24/1

08:25-12:23

1 stop3h 58m

£99

San FranciscoSeattle

SFO - SEA

SFOSEA

San Francisco

Sun 15/2

11:34-13:55

Nonstop2h 21m

Seattle/Tacoma Intl

Wed 18/2

07:45-12:49

1 stop5h 04m

£102

San FranciscoSeattle

SFO - SEA

SFOSEA

San Francisco

Sat 14/2

20:47-23:07

Nonstop2h 20m

Seattle/Tacoma Intl

Tue 17/2

09:50-16:44

1 stop6h 54m

£102

San FranciscoSeattle

SFO - SEA

SFOSEA

San Francisco

Sun 11/1

06:00-08:18

Nonstop2h 18m

Seattle/Tacoma Intl

Mon 12/1

08:25-12:23

1 stop3h 58m

£106

San FranciscoSeattle

SFO - SEA

SFOSEA

San Francisco

Sun 11/1

14:50-23:15

1 stop8h 25m

Seattle/Tacoma Intl

Wed 14/1

09:55-17:05

1 stop7h 10m

£113

San FranciscoSeattle

SFO - SEA

SFOSEA

San Francisco

Thu 29/1

05:30-12:20

1 stop6h 50m

Seattle/Tacoma Intl

Sun 1/2

14:15-22:50

1 stop8h 35m

£113

San FranciscoSeattle

SFO - SEA

SFOSEA

San Francisco

Thu 15/1

15:20-23:40

1 stop8h 20m

Seattle/Tacoma Intl

Sun 18/1

05:15-11:50

1 stop6h 35m

£113

San FranciscoSeattle

SFO - SEA

SFOSEA

San Francisco

Thu 22/1

05:05-12:05

1 stop7h 00m

Seattle/Tacoma Intl

Sun 25/1

14:15-22:50

1 stop8h 35m

£113

San FranciscoSeattle

SFO - SEA

SFOSEA

San Francisco

Sun 11/1

05:00-12:15

1 stop7h 15m

Seattle/Tacoma Intl

Mon 12/1

06:05-14:20

2 stops8h 15m

£117

Flights are sorted by cheapest return flights first.

Deals found on 20/12

Showing 1-10 of 24 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 December 2025.

To ensure you get the cheapest price possible for a flight from San Francisco to Seattle, you should look to book at least 64 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, January is the cheapest month in which you can book a flight from San Francisco to Seattle (average of £61). Flying from San Francisco to Seattle in May is currently the most expensive (average of £102). 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 21 December 2025.

A simple way to save on the total cost of your ticket is to fly from San Francisco to Seattle at midday. If you’re flexible enough to do this you can expect to save up to 85% on your trip compared to booking a flight in the evening.

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 21 December 2025.
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
8.0
Very Good
11,492 reviews
Check prices

Crew

8.5

Comfort

7.8

Entertainment

7.0

Food

7.1

Overall

8.0

Boarding

8.1

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
8.0
Very Good
11,492 reviews
Alaska Airlines
8.0
Very Good
11,492 reviews
Check prices

Crew

8.5

Comfort

7.8

Entertainment

7.0

Food

7.1

Overall

8.0

Boarding

8.1

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 20m for a nonstop flight. There are 66 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 12 times in the past calendar month.

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

    Alaska Airlines can get you from San Francisco to Seattle in just under 2h 10m. Your travel time will be generally consistent. Airlines will cover a distance of 679 mi. Generally, flights for this route are direct.

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

    Currently priced at £117, 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 36% 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?

    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: Horizon Air (100%), Aeromexico (95%), Air China (91%).

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

    Looking at all options, your cheapest flight can be booked for £85. While the most popular route (San Francisco - Seattle/Tacoma Intl) can be booked for £72 on average, our data indicates £121 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, January is the cheapest month in which you can book a flight from San Francisco to Seattle (average of £61). Flying from San Francisco to Seattle in May is currently the most expensive (average of £102). 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
Leavenworth
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.
San Francisco to Portland flights
Los Angeles to Seattle flights
San Diego to Seattle flights
Los Angeles to Portland flights
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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 21 December 2025.
AirlineCheapestAverageFlexibilityOn-time
Alaska AirlinesCheapest£117Average£205FlexibilityNo 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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