SFO - SEA

$141 Find Cheap Flights from San Francisco to Seattle – Compare and Save

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Everything you should know

Cheapest return flight
$269
Typical prices: $359-$690
Alaska Airlines
Mon 12/11Mon 19/11
SFO - SEA • Direct
Cheapest one-way flight
$141
Typical prices: $235-$508
United Airlines
Mon 31/12
SFO - SEA • Direct
Direct flights
You can fly direct with Alaska Airlines, United Airlines, and Delta. Average duration is 2h 18m
Direct flights
+1
Direct flights
+1
Avoid delays
Most punctual • 84% on-time
Best time • Fewest delays
Insights
Insights
When to book
in advance
Our data shows that travellers who book at least 24 weeks in advance save around 54% compared to booking last minute.
Insights
Insights
When to travel
Cheapest • 33% price drop
Most popular
Good to know
+1
Good to know
+1
Top stopover airports
Cheapest • Avg $313 (return)
Shortest trip • 13h 10m (one-way)
Insights
Insights
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We hope you enjoy your trip to Seattle!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from San Francisco to Seattle (SFO-SEA)

 
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent return flight deals from San Francisco to Seattle

Thu, 12 Nov - Thu, 19 Nov
Alaska Airlines Logo
10:39 - 12:56SFO  San Francisco-SEA Seattle/Tacoma Intl
2h 17mdirect
Alaska Airlines Logo
07:18 - 09:41SEA  Seattle/Tacoma Intl-SFO San Francisco
2h 23mdirect
$269Alaska Airlines
Tue, 17 Nov - Tue, 17 Nov
Alaska Airlines Logo
10:39 - 12:56SFO  San Francisco-SEA Seattle/Tacoma Intl
2h 17mdirect
Alaska Airlines Logo
15:48 - 18:01SEA  Seattle/Tacoma Intl-SFO San Francisco
2h 13mdirect
$271Alaska Airlines
Thu, 3 Dec - Thu, 10 Dec
Alaska Airlines Logo
09:40 - 11:57SFO  San Francisco-SEA Seattle/Tacoma Intl
2h 17mdirect
Alaska Airlines Logo
20:51 - 23:02SEA  Seattle/Tacoma Intl-SFO San Francisco
2h 11mdirect
$278Alaska Airlines
Thu, 22 Oct - Tue, 27 Oct
Alaska Airlines Logo
06:07 - 08:20SFO  San Francisco-SEA Seattle/Tacoma Intl
2h 13mdirect
Alaska Airlines Logo
09:59 - 12:26SEA  Seattle/Tacoma Intl-SFO San Francisco
2h 27mdirect
$280Alaska Airlines
Sat, 5 Dec - Tue, 8 Dec
Southwest Logo
15:20 - 20:30SFO  San Francisco-SEA Seattle/Tacoma Intl
5h 10m1 stop Las Vegas Harry Reid Intl
Southwest Logo
07:00 - 12:50SEA  Seattle/Tacoma Intl-SFO San Francisco
5h 50m1 stop San Diego
$306Southwest
Thu, 12 Nov - Thu, 19 Nov
Frontier Logo
18:02 - 20:08SFO  San Francisco-SEA Seattle/Tacoma Intl
26h 06m1 stop Ontario
Frontier Logo
21:13 - 14:34SEA  Seattle/Tacoma Intl-SFO San Francisco
17h 21m1 stop Las Vegas Harry Reid Intl
$310Frontier
Thu, 22 Oct - Mon, 26 Oct
Delta Logo
10:35 - 12:57SFO  San Francisco-SEA Seattle/Tacoma Intl
2h 22mdirect
Delta Logo
21:35 - 23:56SEA  Seattle/Tacoma Intl-SFO San Francisco
2h 21mdirect
$315Delta
Sat, 31 Oct - Tue, 3 Nov
Southwest Logo
05:10 - 10:25SFO  San Francisco-SEA Seattle/Tacoma Intl
5h 15m1 stop Las Vegas Harry Reid Intl
Southwest Logo
05:15 - 11:45SEA  Seattle/Tacoma Intl-SFO San Francisco
6h 30m2 stops Sacramento Intl Los Angeles
$317Southwest
Fri, 4 Dec - Mon, 14 Dec
Alaska Airlines Logo
15:58 - 18:13SFO  San Francisco-SEA Seattle/Tacoma Intl
2h 15mdirect
Alaska Airlines Logo
18:40 - 20:52SEA  Seattle/Tacoma Intl-SFO San Francisco
2h 12mdirect
$322Alaska Airlines
Thu, 22 Oct - Fri, 30 Oct
Alaska Airlines Logo
06:07 - 08:20SFO  San Francisco-SEA Seattle/Tacoma Intl
2h 13mdirect
Alaska Airlines Logo
09:59 - 12:26SEA  Seattle/Tacoma Intl-SFO San Francisco
2h 27mdirect
$324Alaska Airlines
Booking Insights

Price, demand, and travel trends for San Francisco to Seattle flights

Use KAYAK data on prices, travel dates, airlines, and seasonal trends to compare options and book flights with more confidence.

How much is a return flight from San Francisco to Seattle?

Return flights from San Francisco to Seattle typically range from $359 to $690. The lowest price found in the past 5 days was $269 on Alaska Airlines.

What's the cheapest day of the week to fly from San Francisco to Seattle?

Based on deals KAYAK users found in the last 12 months, Wednesday is the cheapest day of the week to fly from San Francisco to Seattle. It’s 8% cheaper than the average day, while Sunday is the most expensive, with prices 9% higher.

What is the cheapest month to fly from San Francisco to Seattle?

•February is the cheapest month to fly from San Francisco to Seattle at $347 return.
•July ($593) and June ($586) are the most expensive months.
•The price difference between flying in the cheapest and most expensive months is 70% on average.
This is based on KAYAK aggregated and averaged internal data over the past 12 months.

When are flights from San Francisco to Seattle the cheapest?

Flights from San Francisco to Seattle are cheapest 24 weeks before departure. Booking in this window typically costs about 54% less than the average last-minute fare (within 2 weeks of the flight), based on KAYAK data.

Key details for San Francisco to Seattle flights

Low season

February

Cheapest flight

$141
Beat the crowds with an average 31% drop in traveller numbers.
The most popular month to fly with an average 36% increase in traveller numbers.
One-way flight from San Francisco to Seattle

When to book flights from San Francisco to Seattle

Are your dates flexible? Find out the best times to travel from San Francisco to Seattle based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated return price

Your San Francisco to Seattle flight questions, answered

Find helpful answers about this route, including flight times, airports, airlines, and booking tips.

  • What are the earliest and latest flights from San Francisco to Seattle?

    These are the earliest and latest flight times available from San Francisco to Seattle:

    • Earliest: departs at 06:00 and lands at 08:18
    • Latest: departs at 22:45 and lands at 01:03.

    The flight takes about 2h 18m.

  • Which cabin classes can I book on flights from San Francisco to Seattle?

    Only Economy class is available on flights from San Francisco to Seattle.

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

    A direct flight from San Francisco to Seattle takes 2h 18m, covering 1,757 km.

  • Do I need a passport to fly from San Francisco to Seattle?

    No, a passport is not required for this domestic route, but you will need another form of identification, such as a driving licence.

  • How much should I expect to pay for a San Francisco to Seattle flight?

    Return flights from San Francisco to Seattle range from $359 to $690, with an average of $519 over the past 12 months. Anything below $359 counts as a good deal.

  • How expensive are last-minute San Francisco to Seattle flights?

    Last-minute fares on this route (booked within two weeks of departure) run 53% above the $519 route average. Book 24 weeks before departure for the lowest fares.

  • How much can I save by having a stopover when flying from San Francisco to Seattle?

    On this route, stopover flights are cheaper than direct options on average. Stopover fares average $313 return via Las Vegas Harry Reid Intl (LAS), compared with $518 for direct.

  • How does on-time performance compare across airlines flying from San Francisco to Seattle?

    United Airlines is slightly above the route average for timely arrivals, while Delta has a lower on-time arrival rate. On-time arrival rates on San Francisco to Seattle flights are:

    • United Airlines: 84% on time
    • Delta: 83% on time
    • Alaska Airlines: 80% on time

    On average, flights on this route are punctual 82% of the time.

  • What is the standard checked bag allowance on flights from San Francisco to Seattle?

    There is no standard. Checked bag policies vary by airline on this route. Most carriers charge $62–$178 for the first checked bag in Economy. Premium fares and elite status bookings typically include a free checked bag.

  • Which aircraft model is used most often on flights from San Francisco to Seattle?

    The Airbus A320-100/200 family is used most often on this route, operated mainly by United Airlines. Other aircraft seen on the route include Boeing 737-800 Passenger/BBJ2 (winglets) variants.

  • How are flight departures from San Francisco to Seattle spread across the day?

    Morning is the busiest departure period on San Francisco to Seattle flights, with 35% leaving in that window. Afternoon departures account for 30%, Evening flights for 25%, and Night flights for 10%.

  • Have flight prices from San Francisco to Seattle changed much recently?

    Yes. Based on fares seen in the past 5 days, return flight prices on this route showed a wide range, from about $269 to $1,393. That means the highest observed fare was about 5x higher than the lowest one.

  • Which airlines offer Wi-Fi on San Francisco to Seattle flights?

    Four airlines offer in-flight Wi-Fi on San Francisco to Seattle flights:

    • Alaska Airlines
    • Delta
    • American Airlines
    • JetBlue

    Pricing varies by airline and fare class. Some plans are included with the ticket or loyalty programme, while others are paid add-ons priced by flight length.

  • How are flight prices from San Francisco to Seattle looking right now?

    One-way fares from San Francisco to Seattle are currently lower than usual. Average one-way flight prices are about $176, which is 49% below the typical average for this route.

  • Which car hire options are available at Seattle/Tacoma Intl Airport (SEA)?

    Seattle/Tacoma Intl Airport (SEA) hosts 5 major car rental companies, with daily rates starting from around $7 for economy cars. Top options include:

    • Fox
    • Europcar
    • Thrifty
    • Budget
    • Dollar

  • Which airports can I use when flying from San Francisco to Seattle?

    Flights from San Francisco to Seattle usually depart from San Francisco (SFO) and arrive at Seattle/Tacoma Intl (SEA).

  • What time of day has the fewest delays on flights from San Francisco to Seattle?

    Morning flights have the fewest delays on this route, while afternoon departures tend to have the most.

  • At what point is a flight considered delayed on the route from San Francisco to Seattle?

    A flight is considered delayed when it departs 15 minutes or more after its scheduled time. This is the standard used by the US Department of Transportation and most airline industry reporting. On the San Francisco to Seattle route, 18% of flights were delayed in the past three months, with delays averaging 2h 15m.

  • Which airports do connecting flights from San Francisco to Seattle pass through?

    One-stop flights from San Francisco to Seattle most commonly connect through:

    • Denver Intl (DEN) – 41% of one-stop connections
    • Las Vegas Harry Reid Intl (LAS) – 29% of one-stop connections
    • Ontario (ONT) – 29% of one-stop connections

  • Can I save money by using flexible dates for flights from San Francisco to Seattle?

    Yes. Flexible dates can save you up to 16% on flights from San Francisco to Seattle. Wednesday is the cheapest departure day at $479 return on average, while Sunday is the most expensive at $568, a difference of $89.

    KAYAK's flexible dates feature shows options up to three days before and after your selected dates, making it easier to compare nearby fares.

  • Which airlines fly from San Francisco to Seattle?

    3 airlines operate flights between San Francisco and Seattle. The airlines offering direct flights on this route include:

    • Alaska Airlines
    • United Airlines
    • Delta

  • How much time can I save by choosing a different stopover airport from San Francisco to Seattle?

    Flying via Las Vegas Harry Reid Intl (LAS) gives the shortest average 1-stop total travel time of 10h 08m, compared to 13h 10m via Denver Intl (DEN) and 14h 45m via Ontario (ONT).

  • What popular places can I visit in Seattle?

    Some of the most popular sights in Seattle are Washington State Convention Center, Hilton Seattle, and Seattle Center. These are among the most viewed places in Seattle on KAYAK.

  • Which airlines offer extra legroom and free seat selection on San Francisco to Seattle flights?

    Among airlines operating San Francisco to Seattle flights:

    • Alaska Airlines: offers extra legroom; offers free seat selection
    • United Airlines: offers extra legroom; offers free seat selection
    • Delta: offers extra legroom; offers free seat selection
    • American Airlines: offers free seat selection

    Extra legroom and free seat selection availability depends on fare class and route.

  • Which airlines include bags at no extra cost on San Francisco to Seattle flights?

    Here are some options for this route, based on selected ticket types and cabin classes:

    • Alaska Airlines: a cabin bag and a checked bag in Economy class
    • United Airlines: a cabin bag and a checked bag in Economy class
    • American Airlines: a cabin bag and a checked bag in Business Class

    Baggage allowance can vary by ticket type, cabin class, route, and airline, so always check the fare details before booking.

  • Is bag storage available at Seattle Tacoma International Airport?

    Smarte Carte offers not only rentals of carts, strollers, and wheelchairs but also provides baggage storage as well with their Baggage Storage Seattle service. They provide both short and long-term baggage storage in their secure facility. The facility is conveniently located on the arrivals level at baggage claim 9.

  • Is there a private area at Seattle Tacoma International Airport that nursing mothers can use?

    Inside the children's playroom, there is a Mother's Room which is private and quiet and also offers rocking chairs for you and your baby. This room comes with adjustable lighting as well as footstools, side tables, and electrical outlets. The airport offers a total of eight of these rooms throughout the various terminal buildings.

  • Does Seattle Tacoma International Airport have a cell phone lot?

    There is a complimentary cell phone lot featuring a large sign with a QR code. Drivers can simply scan the code on their smartphone to receive detailed arrivals information. The lot is located adjacent to the South 170th Street exit on the Airport Expressway. Drivers may park for free for up to twenty minutes.

  • If I have brought along my pet on my flight from San Francisco to Seattle in an animal carrier, where can I pick it up after my flight?

    All animals that traveled in the baggage compartment in animal carriers can be picked up in the baggage claim area. If your pet was sent via the airline’s cargo service, you must contact your individual airline to find out where their individual cargo service office is located at the airport to pick up your pet.

Your guide to booking San Francisco to Seattle flights

Get tips on when to book, when to fly, and what to know before your trip.
  • If your dates are flexible, aim for a Wednesday departure and avoid flying on Sunday. On this route, Wednesday flights average $479, about $89 less than Sunday fares (16% savings) based on the last 12 months.
  • For the best chance at a low fare, aim to book around 24 weeks before you fly. On this route, that window historically saves about 54% versus last-minute pricing (KAYAK booking data, last 12 months).
  • If you can choose when to travel, plan your San Francisco to Seattle trip for February. Fares historically average $347 return in that month – typically $246 less than the most expensive month, which is July (based on the last 12 months).
  • For the best chance of arriving on time, fly with United Airlines. Over the past three months, 84% of United Airlines flights from San Francisco to Seattle arrived on time, slightly above the route average of 82%. When flights on this route arrive late, they're delayed by an average of 2h 15m, so choosing an airline with strong on-time performance can make a difference if you're on a tight schedule.
  • If you have the time, taking a 1-stop flight through Las Vegas Harry Reid Intl Airport (LAS) can be cheaper than flying direct. The cheapest stopover option averages $313 return on this route – about $205 less than direct flights (based on the last 12 months).
  • If you're arriving late at night and need somewhere to stay, check out these hotels close to Seattle/Tacoma Intl Airport.

    • Seattle Airport Marriott
    • Coast Gateway Hotel
    • Fairfield by Marriott Inn & Suites Seattle Sea-Tac Airport
  • What trip to the San Francisco area is complete without a bit of wine tasting? If you missed out this trip, or you did not get your fill, then SF Uncork'd is just what the doctor ordered. Located in Terminal 3 near Gate 85 in San Francisco International Airport, this bar offers a large selection of all varieties of wines by the glass, including a unique selection of wine flights.
  • One unique business you usually do not find at an airport comes the San Francisco Museum of Modern Art Store, located in the International Terminal of San Francisco International Airport. Not only is this a great place to just browse and wonder, it also features great gifts and even offers excellent coffee.
  • Who does not love a brand new gadget or the latest piece of technology? If this sounds like you, then InMotion Entertainment is just your type of place. Located in the International Terminal of San Francisco International Airport, this store features headphones, cameras, and travel solutions like backpacks and travel pillows.
  • When looking for a Seattle hotel that is both convenient and affordable, there may be no better choice than the Hilton Seattle Airport & Conference Center. This hotel features a 24-hour complimentary airport shuttle service, is close to the rail station that can quickly bring you to downtown Seattle, has two separate business centers with free WiFi and remote printing, and houses a fitness center with whirlpool.
  • What says Seattle better than a booming and lively music scene? This is just as true at Seattle Tacoma International Airport, where you will find the Sub Pop Store. Imagine having a complete record store tucked away in an airport -- that is what you will find at Sub Pop. Located in the Central Terminal of Seattle Tacoma International Airport, this store may enchant you so much you may forget to ever leave the airport.

Prefer to fly direct from San Francisco to Seattle/Tacoma Intl?

 
Find which airlines fly direct from San Francisco Airport to Seattle/Tacoma Intl Airport, which days they fly and book direct flights.

Direct departures

San Francisco to Seattle/Tacoma Intl

Monday

Alaska Airlines,Delta,United Airlines

Alaska Airlines,Delta, +1 more

Tuesday

Alaska Airlines,Delta,United Airlines

Alaska Airlines,Delta, +1 more

Wednesday

Alaska Airlines,Delta,United Airlines

Alaska Airlines,Delta, +1 more

Thursday

Alaska Airlines,Delta,United Airlines

Alaska Airlines,Delta, +1 more

Friday

Alaska Airlines,Delta,United Airlines

Alaska Airlines,Delta, +1 more

Saturday

Alaska Airlines,Delta,United Airlines

Alaska Airlines,Delta, +1 more

Sunday

Alaska Airlines,Delta,United Airlines

Alaska Airlines,Delta, +1 more

See more direct flights

Direct returns

Seattle/Tacoma Intl to San Francisco

Monday

Alaska Airlines,Delta,United Airlines

Alaska Airlines,Delta, +1 more

Tuesday

Alaska Airlines,Delta,United Airlines

Alaska Airlines,Delta, +1 more

Wednesday

Alaska Airlines,Delta,United Airlines

Alaska Airlines,Delta, +1 more

Thursday

Alaska Airlines,Delta,United Airlines

Alaska Airlines,Delta, +1 more

Friday

Alaska Airlines,Delta,United Airlines

Alaska Airlines,Delta, +1 more

Saturday

Alaska Airlines,Delta,United Airlines

Alaska Airlines,Delta, +1 more

Sunday

Alaska Airlines,Delta,United Airlines

Alaska Airlines,Delta, +1 more

See more direct flights

More options for your flight from San Francisco to Seattle

Complete your trip to Seattle with a hotel stay or car hire