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Cheap flights from San Francisco to Seattle from $48

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 9/30. 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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Find the cheapest flights from San Francisco to Seattle

Cheap round-trip flights

Hawaiian Airlines Logo
6:00 am - 8:07 amSFO-SEA
2h 07mnonstop
Hawaiian Airlines Logo
1:40 pm - 3:52 pmSEA-SFO
2h 12mnonstop
$104Hawaiian Airlines
Find Deal
Tue, Sep 23 - Tue, Sep 23
Hawaiian Airlines Logo
11:48 am - 6:59 pmSFO-SEA
7h 11m1 stop
Hawaiian Airlines Logo
8:08 am - 10:32 amSEA-SFO
2h 24mnonstop
$105Hawaiian Airlines
Find Deal
Wed, Sep 17 - Wed, Sep 24
Logo
9:19 pm - 11:42 pmSFO-SEA
2h 23mnonstop
Logo
8:08 pm - 10:23 pmSEA-SFO
2h 15mnonstop
$113
Find Deal
Wed, Sep 17 - Tue, Sep 23
Alaska Airlines Logo
6:00 am - 8:07 amSFO-SEA
2h 07mnonstop
Alaska Airlines Logo
11:25 am - 1:44 pmSEA-SFO
2h 19mnonstop
$115Alaska Airlines
Find Deal
Wed, Sep 10 - Wed, Sep 10
Delta Logo
4:40 pm - 6:51 pmSFO-SEA
2h 11mnonstop
Delta Logo
1:35 pm - 4:00 pmSEA-SFO
2h 25mnonstop
$121Delta
Find Deal
Tue, Sep 9 - Wed, Sep 10
Logo
5:16 pm - 7:31 pmSFO-SEA
2h 15mnonstop
Logo
8:15 pm - 10:29 pmSEA-SFO
2h 14mnonstop
$122
Find Deal
Tue, Oct 7 - Sat, Oct 11
Alaska Airlines Logo
6:00 am - 8:07 amSFO-SEA
2h 07mnonstop
Alaska Airlines Logo
9:40 pm - 12:04 amSEA-SFO
2h 24mnonstop
$123Alaska Airlines
Find Deal
Sat, Sep 27 - Mon, Sep 29
Delta Logo
8:58 pm - 11:15 pmSFO-SEA
2h 17mnonstop
Delta Logo
5:45 pm - 8:05 pmSEA-SFO
2h 20mnonstop
$129Delta
Find Deal
Sat, Sep 27 - Wed, Oct 1
Southwest Logo
5:30 am - 11:45 amSFO-SEA
6h 15m1 stop
Southwest Logo
5:50 am - 3:00 pmSEA-SFO
9h 10m1 stop
$141Southwest
Find Deal
Wed, Oct 15 - Tue, Oct 21
Southwest Logo
5:30 am - 11:45 amSFO-SEA
6h 15m1 stop
Southwest Logo
1:20 pm - 9:20 pmSEA-SFO
8h 00m2 stops
$146Southwest
Find Deal
Wed, Oct 15 - Tue, Oct 21

Hawaiian Airlines flights from San Francisco to Seattle

Our best Hawaiian Airlines deals on San Francisco to Seattle flight tickets
Hawaiian Airlines
Sep 23
SFO6:00 amSan Francisco
2h 07m
SEA8:07 amSeattle/Tacoma Intl
Sep 23
SEA1:40 pmSeattle/Tacoma Intl
2h 12m
SFO3:52 pmSan Francisco
$104
Find similar
Hawaiian Airlines
Sep 17
SFO11:48 amSan Francisco
7h 11m
1 stop
SEA6:59 pmSeattle/Tacoma Intl
Sep 24
SEA8:08 amSeattle/Tacoma Intl
2h 24m
SFO10:32 amSan Francisco
$105
Find similar
Hawaiian Airlines
Sep 20
SFO11:48 amSan Francisco
6h 05m
1 stop
SEA5:53 pmSeattle/Tacoma Intl
Sep 23
SEA8:05 amSeattle/Tacoma Intl
5h 27m
1 stop
SFO1:32 pmSan Francisco
$108
Find similar

Alaska Airlines flights from San Francisco to Seattle

Our best Alaska Airlines deals on San Francisco to Seattle flight tickets
Alaska Airlines
Sep 10
SFO6:00 amSan Francisco
2h 07m
SEA8:07 amSeattle/Tacoma Intl
Sep 10
SEA11:25 amSeattle/Tacoma Intl
2h 19m
SFO1:44 pmSan Francisco
$115
Find similar
Alaska Airlines
Sep 27
SFO6:00 amSan Francisco
2h 07m
SEA8:07 amSeattle/Tacoma Intl
Sep 29
SEA9:40 pmSeattle/Tacoma Intl
2h 24m
SFO12:04 amSan Francisco
$123
Find similar
Alaska Airlines
Sep 14
SFO7:00 amSan Francisco
2h 10m
SEA9:10 amSeattle/Tacoma Intl
Sep 17
SEA7:05 pmSeattle/Tacoma Intl
2h 15m
SFO9:20 pmSan Francisco
$131
Find similar

momondo 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, momondo users made 832,500 searches. Data last updated August 14, 2025.
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

San FranciscoSeattle

SFO - SEA

SFOSEA

San Francisco

Tue 9/23

6:00 am-8:07 am

Nonstop2h 07m

Seattle/Tacoma Intl

Tue 9/23

1:40 pm-3:52 pm

Nonstop2h 12m

$104

San FranciscoSeattle

SFO - SEA

SFOSEA

San Francisco

Wed 9/17

11:48 am-6:59 pm

1 stop7h 11m

Seattle/Tacoma Intl

Wed 9/24

8:08 am-10:32 am

Nonstop2h 24m

$105

San FranciscoSeattle

SFO - SEA

SFOSEA

San Francisco

Wed 9/17

9:19 pm-11:42 pm

Nonstop2h 23m

Seattle/Tacoma Intl

Tue 9/23

8:08 pm-10:23 pm

Nonstop2h 15m

$113

San FranciscoSeattle

SFO - SEA

SFOSEA

San Francisco

Wed 9/10

6:00 am-8:07 am

Nonstop2h 07m

Seattle/Tacoma Intl

Wed 9/10

11:25 am-1:44 pm

Nonstop2h 19m

$115

San FranciscoSeattle

SFO - SEA

SFOSEA

San Francisco

Tue 9/9

4:40 pm-6:51 pm

Nonstop2h 11m

Seattle/Tacoma Intl

Wed 9/10

1:35 pm-4:00 pm

Nonstop2h 25m

$121

San FranciscoSeattle

SFO - SEA

SFOSEA

San Francisco

Tue 10/7

5:16 pm-7:31 pm

Nonstop2h 15m

Seattle/Tacoma Intl

Sat 10/11

8:15 pm-10:29 pm

Nonstop2h 14m

$122

San FranciscoSeattle

SFO - SEA

SFOSEA

San Francisco

Sat 9/27

6:00 am-8:07 am

Nonstop2h 07m

Seattle/Tacoma Intl

Mon 9/29

9:40 pm-12:04 am

Nonstop2h 24m

$123

San FranciscoSeattle

SFO - SEA

SFOSEA

San Francisco

Sat 9/27

8:58 pm-11:15 pm

Nonstop2h 17m

Seattle/Tacoma Intl

Wed 10/1

5:45 pm-8:05 pm

Nonstop2h 20m

$129

San FranciscoSeattle

SFO - SEA

SFOSEA

San Francisco

Wed 10/15

5:30 am-11:45 am

1 stop6h 15m

Seattle/Tacoma Intl

Tue 10/21

5:50 am-3:00 pm

1 stop9h 10m

$141

San FranciscoSeattle

SFO - SEA

SFOSEA

San Francisco

Wed 10/15

5:30 am-11:45 am

1 stop6h 15m

Seattle/Tacoma Intl

Tue 10/21

1:20 pm-9:20 pm

2 stops8h 00m

$146

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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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?

In general, October is the cheapest month to fly from San Francisco to Seattle. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $196. If you don’t want to visit Seattle in October, then you should wait until January to fly from San Francisco, when ticket prices are also cheap, with an average price of $200.

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

On average, the least expensive day to fly to Seattle from San Francisco is on a Friday. momondo users have found tickets for Friday departures for as low as $299. However, this price may fluctuate depending on the airline, the season, and holidays. On the other hand, Monday is the most expensive day to depart from San Francisco because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $433.

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

Flying to Seattle from San Francisco in the afternoon is the least expensive time of day to depart. momondo users have found prices as low as $279 when looking at flights departing in the afternoon. Flights to Seattle are more costly at noon, with an average ticket price of $375. Departure times at noon fall within the peak daily travel times, which is why tickets can be more expensive.

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 $237 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 $150 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?

You could potentially save up to 22% on your flight if you consider stops on a San Francisco to Seattle flight.

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

As of August 2025, prices for San Francisco to Seattle flights are approximately 4% 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

Best Price Found

$48

Fastest flight time

2h 07m

Direct flights

Every day

Airports in Seattle

1 airport
The best one-way flight to Seattle from San Francisco in the past 72 hours is $48. The best round-trip flight deal from San Francisco to Seattle found on momondo in the last 72 hours is $104.
The fastest flight from San Francisco to Seattle takes 2h 07m
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 678.2 mi apart from one another. Flights usually cover this in 2h 07m, depending on flying conditions and air traffic around both airports.

  • 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 were last updated today.

  • 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?

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to 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?

  • 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
Airline
Rating
Free Cancellation
Price
Spirit AirlinesPriceFrom $64Free CancellationRating
6.3
8,045 reviews
Search Spirit Airlines flights
FrontierPriceFrom $100Free CancellationRating
5.8
3,219 reviews
Search Frontier flights
DeltaPriceFrom $114Free CancellationRating
8.0
7,980 reviews
Search Delta flights
United AirlinesPriceFrom $127Free CancellationRating
7.4
8,916 reviews
Search United Airlines flights
Alaska AirlinesPriceFrom $132Free CancellationRating
8.0
10,000 reviews
Search Alaska Airlines flights
Hawaiian AirlinesPriceFrom $136Free CancellationRating
7.8
2,656 reviews
Search Hawaiian Airlines flights
American AirlinesPriceFrom $226Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights

  • Delta Flights From San Francisco to Seattle

    Delta is one of the most popular airlines flying from San Francisco to Seattle, operating 9 flights/week on average for this route. A good Delta flight deal for San Francisco to Seattle starts from $114 round-trip, up to an average price of $198. Our users have rated Delta at 8.0/10.

  • Alaska Airlines Flights From San Francisco to Seattle

    Alaska Airlines is also a popular choice for this route. Alaska Airlines flight deals for San Francisco to Seattle start from as low as $132 round-trip, depending on your selected dates, with average Alaska Airlines deals seen on momondo around $246. Alaska Airlines operates 11 flights to Seattle from San Francisco in an average week. Users have rated it 8.0/10 across 10,000 reviews.

Traveling to a place near Seattle?

Book flights to Seattle if you plan to visit one of these locations
Leavenworth
Tacoma
SeaTac
Ocean Shores
Olympia
Renton
Kent
Lynnwood
Federal Way
Puyallup
Marysville
Tukwila
Kirkland
Lakewood
Centralia
Shoreline
Cle Elum
Fife
Westport
Redmond

Why use momondo?

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

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from San Francisco to Seattle for you.

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

Yes. momondo allows you to filter the results for San Francisco to Seattle flights to just show those with 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 simply researching potential flights to Seattle, momondo offers a useful price alert feature which will track prices for flights to Seattle from San Francisco and alert you 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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