What is the cheapest airline that flies from San Francisco to Seattle/Tacoma Intl?

Delta and United Airlines are the most popular carriers operating from San Francisco to Seattle/Tacoma Intl

How many flights depart from San Francisco to Seattle on average per week?

As of December 2025, 430 flights take off from San Francisco and land in Seattle each week. The most common flight departure day for this route is Thu, with 23% of weekly flights taking off on this day.

What is the most punctual flight time for San Francisco to Seattle flights?

Generally, flights departing in the morning tend to experience fewer delays. Flights departing in the evening have, in the past, seen delays more frequently in comparison.

What day of the week experiences the fewest flight delays on this route?

Tuesday is statistically the day of the week that experiences the fewest delays on this flight route. Sunday has historically seen more delays on average compared to the rest of the week.

Which airline has the best punctuality record on San Francisco to Seattle flights?

According to our data, Delta has had the least delays on this route over the last 12 months, with about 10% of their flights experiencing any sort of delay.

How many flights depart from San Francisco to Seattle on average per day?

As of December 2025, there are 61 flights per day flying from San Francisco to Seattle. The most common time of day flights depart is 4:00p.m., with 43% of flights taking off in the afternoon.

How often are flights from San Francisco to Seattle delayed?

Historically, on average around 14% of flights between San Francisco and Seattle have experienced a delay on any given week. The average delay length over the past 12 months has been 132 minutes.

When did momondo last update prices for flights from San Francisco Airport to Seattle/Tacoma Intl Airport?

Prices for flights from San Francisco Airport to Seattle/Tacoma Intl Airport are updated daily.

How many operators does momondo search for flights from San Francisco Airport to Seattle/Tacoma Intl Airport?

As of December 2025, there is 1 operator available to choose from for flights from San Francisco Airport to Seattle/Tacoma Intl Airport.

How old do you have to be to fly from San Francisco Airport to Seattle/Tacoma Intl Airport?

Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from San Francisco Airport to Seattle/Tacoma Intl Airport.

What documentation or ID do you need to fly to Seattle/Tacoma Intl Airport?

The necessary travel and health documents for your Seattle/Tacoma Intl Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

C$ 81 Cheap Flights from San Francisco to Seattle in 2025/26

1 adult

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One-way

Last minute

Direct

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7:25 a.m. - 7:55 p.m.

SFO

SEA

12h 30m2 stops

6:05 a.m. - 2:55 p.m.

SEA

SFO

8h 50m1 stop

C$ 170Southwest

Sat, 10 Jan - Tue, 13 Jan

8:15 a.m. - 8:20 p.m.

SFO

SEA

12h 05m2 stops

9:55 a.m. - 5:05 p.m.

SEA

SFO

7h 10m1 stop

C$ 176Southwest

Thu, 8 Jan - Mon, 12 Jan

7:40 p.m. - 9:58 p.m.

SFO

SEA

2h 18mdirect

8:25 a.m. - 12:23 p.m.

SEA

SFO

3h 58m1 stop

C$ 177Alaska Airlines

Fri, 9 Jan - Wed, 14 Jan

8:15 a.m. - 8:20 p.m.

SFO

SEA

12h 05m2 stops

6:05 a.m. - 2:20 p.m.

SEA

SFO

8h 15m2 stops

C$ 183Southwest

Thu, 8 Jan - Mon, 12 Jan

7:00 a.m. - 9:18 a.m.

SFO

SEA

2h 18mdirect

8:25 a.m. - 12:23 p.m.

SEA

SFO

3h 58m1 stop

C$ 184Alaska Airlines

Fri, 23 Jan - Sun, 25 Jan

5:30 a.m. - 12:20 p.m.

SFO

SEA

6h 50m1 stop

5:00 a.m. - 11:50 a.m.

SEA

SFO

6h 50m1 stop

C$ 190Southwest

Thu, 22 Jan - Sun, 25 Jan

6:05 a.m. - 8:21 a.m.

SFO

SEA

2h 16mdirect

9:41 p.m. - 11:53 p.m.

SEA

SFO

2h 12mdirect

C$ 191Delta

Thu, 19 Mar - Mon, 23 Mar

9:32 p.m. - 8:51 a.m.

SFO

SEA

11h 19m1 stop

8:05 a.m. - 10:31 a.m.

SEA

SFO

2h 26mdirect

C$ 195Alaska Airlines

Mon, 16 Mar - Thu, 19 Mar

8:15 a.m. - 8:20 p.m.

SFO

SEA

12h 05m2 stops

5:00 a.m. - 11:50 a.m.

SEA

SFO

6h 50m1 stop

C$ 197Southwest

Thu, 8 Jan - Sun, 11 Jan

9:41 p.m. - 11:59 p.m.

SFO

SEA

2h 18mdirect

11:35 a.m. - 4:22 p.m.

SEA

SFO

4h 47m1 stop

C$ 198Alaska Airlines

Mon, 5 Jan - Thu, 15 Jan

Southwest flights from San Francisco to Seattle

Our best Southwest deals on San Francisco to Seattle flight tickets

Southwest

10 Jan

SFO7:25 a.m.San Francisco

12h 30m

2 stops

SEA7:55 p.m.Seattle/Tacoma Intl

13 Jan

SEA6:05 a.m.Seattle/Tacoma Intl

8h 50m

1 stop

SFO2:55 p.m.San Francisco

C$ 170

Find similar

Southwest

8 Jan

SFO8:15 a.m.San Francisco

12h 05m

2 stops

SEA8:20 p.m.Seattle/Tacoma Intl

12 Jan

SEA6:05 a.m.Seattle/Tacoma Intl

8h 50m

1 stop

SFO2:55 p.m.San Francisco

C$ 176

Find similar

Southwest

8 Jan

SFO8:15 a.m.San Francisco

12h 05m

2 stops

SEA8:20 p.m.Seattle/Tacoma Intl

12 Jan

SEA6:05 a.m.Seattle/Tacoma Intl

8h 15m

2 stops

SFO2:20 p.m.San Francisco

C$ 183

Find similar

Delta flights from San Francisco to Seattle

Our best Delta deals on San Francisco to Seattle flight tickets

Delta

19 Mar

SFO6:05 a.m.San Francisco

2h 16m

SEA8:21 a.m.Seattle/Tacoma Intl

19 Mar

SEA1:45 p.m.Seattle/Tacoma Intl

2h 19m

SFO4:04 p.m.San Francisco

C$ 191

Find similar

Delta

8 Jan

SFO1:20 p.m.San Francisco

5h 09m

1 stop

SEA6:29 p.m.Seattle/Tacoma Intl

12 Jan

SEA6:05 p.m.Seattle/Tacoma Intl

4h 50m

1 stop

SFO10:55 p.m.San Francisco

C$ 220

Find similar

Delta

3 Jan

SFO5:45 a.m.San Francisco

2h 21m

SEA8:06 a.m.Seattle/Tacoma Intl

14 Jan

SEA9:20 p.m.Seattle/Tacoma Intl

2h 08m

SFO11:28 p.m.San Francisco

C$ 233

Find similar

Fly from

Fly to

Route

Depart

Return

Price

San FranciscoSeattle

SFO - SEA

SFOSEA

San Francisco

Sat 10/1

7:25 a.m.-7:55 p.m.

2 stops12h 30m

Seattle/Tacoma Intl

Tue 13/1

6:05 a.m.-2:55 p.m.

1 stop8h 50m

C$ 170

San FranciscoSeattle

SFO - SEA

SFOSEA

San Francisco

Thu 8/1

8:15 a.m.-8:20 p.m.

2 stops12h 05m

Seattle/Tacoma Intl

Mon 12/1

9:55 a.m.-5:05 p.m.

1 stop7h 10m

C$ 176

San FranciscoSeattle

SFO - SEA

SFOSEA

San Francisco

Fri 9/1

7:40 p.m.-9:58 p.m.

Nonstop2h 18m

Seattle/Tacoma Intl

Wed 14/1

8:25 a.m.-12:23 p.m.

1 stop3h 58m

C$ 177

San FranciscoSeattle

SFO - SEA

SFOSEA

San Francisco

Thu 8/1

8:15 a.m.-8:20 p.m.

2 stops12h 05m

Seattle/Tacoma Intl

Mon 12/1

6:05 a.m.-2:20 p.m.

2 stops8h 15m

C$ 183

San FranciscoSeattle

SFO - SEA

SFOSEA

San Francisco

Fri 23/1

7:00 a.m.-9:18 a.m.

Nonstop2h 18m

Seattle/Tacoma Intl

Sun 25/1

8:25 a.m.-12:23 p.m.

1 stop3h 58m

C$ 184

San FranciscoSeattle

SFO - SEA

SFOSEA

San Francisco

Thu 22/1

5:30 a.m.-12:20 p.m.

1 stop6h 50m

Seattle/Tacoma Intl

Sun 25/1

5:00 a.m.-11:50 a.m.

1 stop6h 50m

C$ 190

San FranciscoSeattle

SFO - SEA

SFOSEA

San Francisco

Thu 19/3

6:05 a.m.-8:21 a.m.

Nonstop2h 16m

Seattle/Tacoma Intl

Mon 23/3

9:41 p.m.-11:53 p.m.

Nonstop2h 12m

C$ 191

San FranciscoSeattle

SFO - SEA

SFOSEA

San Francisco

Mon 16/3

9:32 p.m.-8:51 a.m.

1 stop11h 19m

Seattle/Tacoma Intl

Thu 19/3

8:05 a.m.-10:31 a.m.

Nonstop2h 26m

C$ 195

San FranciscoSeattle

SFO - SEA

SFOSEA

San Francisco

Thu 8/1

8:15 a.m.-8:20 p.m.

2 stops12h 05m

Seattle/Tacoma Intl

Sun 11/1

5:00 a.m.-11:50 a.m.

1 stop6h 50m

C$ 197

San FranciscoSeattle

SFO - SEA

SFOSEA

San Francisco

Mon 5/1

9:41 p.m.-11:59 p.m.

Nonstop2h 18m

Seattle/Tacoma Intl

Thu 15/1

11:35 a.m.-4:22 p.m.

1 stop4h 47m

C$ 198

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Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from San Francisco to Seattle

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

Delays

Other information

What is the cheapest month to fly to Seattle?

If you aren’t able to travel to Seattle during the month of January, then flying in February is also cheap. Prices for this month can be found on momondo for an average of C$ 289.

What is the cheapest day to depart on your flight to Seattle?

Our data shows that Friday is the least expensive day to fly to Seattle. Tickets to fly out on this day can be as low as C$ 186. If your travel schedule is flexible, try to avoid departing on a Sunday because tickets tend to average around C$ 588. These prices are subject to change though, so be sure to set up a Price Alert for flights to Seattle.

What is the cheapest time of day to depart on your flight to Seattle?

Our most recent data shows that the best time of day to fly to Seattle is at noon. Flights from San Francisco to Seattle during this time can be as low as C$ 186. Flights in the afternoon are often more expensive with an average ticket price of C$ 588.

What is the cheapest San Francisco to Seattle/Tacoma Intl flight route?

Fly from San Francisco to Seattle/Tacoma Intl for the best San Francisco - Seattle/Tacoma Intl flight prices

How far in advance should I book a flight to Seattle?

You are more likely to see cheaper flights to Seattle from San Francisco when booking weeks ahead of your departure date. In general, you can expect to find flights to Seattle for around C$ 344 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Seattle from San Francisco for as low as C$ 205 on momondo.

What cabin class options are available on San Francisco to Seattle/Tacoma Intl flights?

There are 4 cabin classes available to choose from on San Francisco to Seattle/Tacoma Intl flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on San Francisco to Seattle flights?

No. A direct flight is the cheapest option for a flight between San Francisco to Seattle.

How have San Francisco to Seattle flight prices changed over time?

As of December 2025, prices for San Francisco to Seattle flights are approximately 21% cheaper when compared to flights at the same time last year.

When to book flights from San Francisco to Seattle

Are you open to changing your travel dates? Check out the ideal times to fly from San Francisco to Seattle according to our flight data. Find out which month and days have the cheapest flights.

Estimated round-trip price

Cheap San Francisco to Seattle (SFO to SEA) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from San Francisco to Seattle

Fastest flight time	2h 23m
Direct flights	Every day
Airports in Seattle	1 airport

The fastest flight from San Francisco to Seattle takes 2h 23m

Direct flights go from San Francisco to Seattle every day.

There is 1 airport near Seattle: Seattle/Tacoma Intl (SEA)

Search flight deals

How far is San Francisco to Seattle/Tacoma Intl by plane?
San Francisco and Seattle/Tacoma Intl are 1091.5 km apart from one another. In terms of flight time, this usually takes a little over 2h 16m.
When did momondo last update prices for flights from San Francisco Airport to Seattle/Tacoma Intl Airport?
Prices for flights from San Francisco Airport to Seattle/Tacoma Intl Airport are updated daily.
How many operators does momondo search for flights from San Francisco Airport to Seattle/Tacoma Intl Airport?
As of December 2025, there is 1 operator available to choose from for flights from San Francisco Airport to Seattle/Tacoma Intl Airport.
How old do you have to be to fly from San Francisco Airport to Seattle/Tacoma Intl Airport?
Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from San Francisco Airport to Seattle/Tacoma Intl Airport.
What documentation or ID do you need to fly to Seattle/Tacoma Intl Airport?
The necessary travel and health documents for your Seattle/Tacoma Intl Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.
What is the most popular plane model from San Francisco to Seattle?
Based on momondo bookings for flights between San Francisco and Seattle, the leading plane model is Boeing 737-800 Passenger/BBJ2 (winglets), making up 15.38% of the total bookings. Other popular models include Boeing 737 MAX 8 with 10.53%, Boeing 737-900 Passenger/BBJ3 (winglets) with 10.36%, and Boeing 737 MAX 9 with 8.36%.
What is the most popular airline from San Francisco to Seattle?
Based on momondo bookings for flights between San Francisco and Seattle, the leading airline is Alaska Airlines, making up 100% of the total bookings.

Best airlines flying from San Francisco to Seattle

Compare and see reviews for airlines that fly from San Francisco to Seattle with momondo

Airline	Rating	Free Cancellation	Price
Alaska Airlines	PriceFrom C$ 154	Free Cancellation	Rating 8.0 11,402 reviews		Search Alaska Airlines flights

Alaska Airlines Flights From San Francisco to Seattle
The lowest priced Alaska Airlines flight from San Francisco to Seattle from the last 72 hours was C$ 154. Generally, Alaska Airlines has 13 flights on this route every week with an average price of C$ 302. Alaska Airlines is rated 8.0/10 by our users.

Leavenworth

Lynnwood

Marysville

Tacoma

SeaTac

Kirkland

Tukwila

Olympia

Ocean Shores

Redmond

Bainbridge Island

Ellensburg

Gig Harbor

Renton

Mukilteo

Cle Elum

Centralia

Federal Way

Puyallup

Shelton

Why use momondo?

Why should I use momondo to find a flight deal from San Francisco to Seattle?

It is quick and easy to find San Francisco to Seattle flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Seattle that suits you.

Can I find flights from San Francisco to Seattle with flexible booking policies on momondo?

All flight searches from San Francisco to Seattle on momondo can be filtered to show those which offer flexible booking policies.

How can momondo help me find flights from San Francisco to Seattle?

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from San Francisco to Seattle.

I’m not ready to book a flight from San Francisco to Seattle right now. Can momondo alert me if prices change?

If you are not ready to book a flight from San Francisco to Seattle now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Seattle and let you know when they change.

An easier way to manage your Seattle trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

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Sat 3/1

Sat 10/1

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Cheap flights from San Francisco to Seattle from C$ 82

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from San Francisco to Seattle departing on 1/1. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

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Big names, great deals

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Filter for what you want

Trusted and free

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Price Alerts

Find the cheapest flights from San Francisco to Seattle

Cheap round-trip flights

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Southwest flights from San Francisco to Seattle

Our best Southwest deals on San Francisco to Seattle flight tickets

Delta flights from San Francisco to Seattle

Our best Delta deals on San Francisco to Seattle flight tickets

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

See travel insights to Seattle from

How to get the cheapest flight ticket from San Francisco to Seattle

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to Seattle?

If you aren’t able to travel to Seattle during the month of January, then flying in February is also cheap. Prices for this month can be found on momondo for an average of C$ 289.

What is the cheapest day to depart on your flight to Seattle?

What is the cheapest time of day to depart on your flight to Seattle?

Our most recent data shows that the best time of day to fly to Seattle is at noon. Flights from San Francisco to Seattle during this time can be as low as C$ 186. Flights in the afternoon are often more expensive with an average ticket price of C$ 588.

What is the cheapest San Francisco to Seattle/Tacoma Intl flight route?

Fly from San Francisco to Seattle/Tacoma Intl for the best San Francisco - Seattle/Tacoma Intl flight prices

How far in advance should I book a flight to Seattle?

What cabin class options are available on San Francisco to Seattle/Tacoma Intl flights?

There are 4 cabin classes available to choose from on San Francisco to Seattle/Tacoma Intl flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on San Francisco to Seattle flights?

No. A direct flight is the cheapest option for a flight between San Francisco to Seattle.

How have San Francisco to Seattle flight prices changed over time?

As of December 2025, prices for San Francisco to Seattle flights are approximately 21% cheaper when compared to flights at the same time last year.

What is the cheapest airline that flies from San Francisco to Seattle/Tacoma Intl?

Delta and United Airlines are the most popular carriers operating from San Francisco to Seattle/Tacoma Intl

How often are flights from San Francisco to Seattle delayed?

Historically, on average around 14% of flights between San Francisco and Seattle have experienced a delay on any given week. The average delay length over the past 12 months has been 132 minutes.

What is the most punctual flight time for San Francisco to Seattle flights?

Generally, flights departing in the morning tend to experience fewer delays. Flights departing in the evening have, in the past, seen delays more frequently in comparison.

What day of the week experiences the fewest flight delays on this route?

Tuesday is statistically the day of the week that experiences the fewest delays on this flight route. Sunday has historically seen more delays on average compared to the rest of the week.

Which airline has the best punctuality record on San Francisco to Seattle flights?

According to our data, Delta has had the least delays on this route over the last 12 months, with about 10% of their flights experiencing any sort of delay.

How many flights depart from San Francisco to Seattle on average per day?

As of December 2025, there are 61 flights per day flying from San Francisco to Seattle. The most common time of day flights depart is 4:00p.m., with 43% of flights taking off in the afternoon.

How many flights depart from San Francisco to Seattle on average per week?

As of December 2025, 430 flights take off from San Francisco and land in Seattle each week. The most common flight departure day for this route is Thu, with 23% of weekly flights taking off on this day.

When to book flights from San Francisco to Seattle

Cheap San Francisco to Seattle (SFO to SEA) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from San Francisco to Seattle

Fastest flight time

Direct flights

Airports in Seattle

How far is San Francisco to Seattle/Tacoma Intl by plane?

When did momondo last update prices for flights from San Francisco Airport to Seattle/Tacoma Intl Airport?

How many operators does momondo search for flights from San Francisco Airport to Seattle/Tacoma Intl Airport?

How old do you have to be to fly from San Francisco Airport to Seattle/Tacoma Intl Airport?

What documentation or ID do you need to fly to Seattle/Tacoma Intl Airport?

What is the most popular plane model from San Francisco to Seattle?

What is the most popular airline from San Francisco to Seattle?

Best airlines flying from San Francisco to Seattle

Compare and see reviews for airlines that fly from San Francisco to Seattle with momondo

Alaska Airlines Flights From San Francisco to Seattle

Travelling to a place near Seattle?

Why use momondo?

Why should I use momondo to find a flight deal from San Francisco to Seattle?

Can I find flights from San Francisco to Seattle with flexible booking policies on momondo?

How can momondo help me find flights from San Francisco to Seattle?

I’m not ready to book a flight from San Francisco to Seattle right now. Can momondo alert me if prices change?

An easier way to manage your Seattle trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to the United States

Airports servicing Washington