SFO - SEA

C$ 110 Find Cheap Flights from San Francisco to Seattle – Compare and Save

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Everything you should know

Cheapest round-trip
C$ 185
Typical prices: C$ 282-C$ 559
Alaska Airlines
Fri 7/12Fri 7/12
SFO - SEA • Direct
Cheapest one-way flights
C$ 110
Typical prices: C$ 187-C$ 427
Southwest
Tue 23/1
SFO - SEA • 1 stop
Direct flights
You can fly direct with Alaska Airlines, United Airlines, and Delta. Average duration is 2h 17m
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 11 weeks in advance save around 59% compared to booking last minute.
Insights
Insights
When to travel
Cheapest • 31% price drop
Most popular
Good to know
+1
Good to know
+1
Top layover airports
Cheapest • Avg C$ 362 (round-trip)
Shortest trip • 9h 38m (one-way)
Insights
Insights
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We hope you enjoy your trip to Seattle!
Flight Deals
Booking Insights
Expert advice
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 round-trip flight deals from San Francisco to Seattle

Wed, 16 Dec - Wed, 16 Dec
Alaska Airlines Logo
7:00 a.m. - 9:16 a.m.SFO  San Francisco-SEA Seattle/Tacoma Intl
2h 16mdirect
Alaska Airlines Logo
11:50 a.m. - 2:12 p.m.SEA  Seattle/Tacoma Intl-SFO San Francisco
2h 22mdirect
C$ 185Alaska Airlines
3+ days ago
Mon, 7 Dec - Mon, 7 Dec
Alaska Airlines Logo
3:58 p.m. - 6:13 p.m.SFO  San Francisco-SEA Seattle/Tacoma Intl
2h 15mdirect
Alaska Airlines Logo
8:51 p.m. - 11:02 p.m.SEA  Seattle/Tacoma Intl-SFO San Francisco
2h 11mdirect
C$ 185Alaska Airlines
3+ days ago
Tue, 1 Dec - Thu, 3 Dec
United Airlines Logo
2:05 p.m. - 4:22 p.m.SFO  San Francisco-SEA Seattle/Tacoma Intl
2h 17mdirect
United Airlines Logo
7:00 a.m. - 9:21 a.m.SEA  Seattle/Tacoma Intl-SFO San Francisco
2h 21mdirect
C$ 192United Airlines
3+ days ago
Mon, 14 Dec - Fri, 18 Dec
Delta Logo
10:41 a.m. - 1:00 p.m.SFO  San Francisco-SEA Seattle/Tacoma Intl
2h 19mdirect
Delta Logo
9:22 p.m. - 11:43 p.m.SEA  Seattle/Tacoma Intl-SFO San Francisco
2h 21mdirect
C$ 192Delta
3+ days ago
Tue, 1 Dec - Sat, 5 Dec
Alaska Airlines Logo
6:00 a.m. - 8:16 a.m.SFO  San Francisco-SEA Seattle/Tacoma Intl
2h 16mdirect
Alaska Airlines Logo
11:50 a.m. - 2:12 p.m.SEA  Seattle/Tacoma Intl-SFO San Francisco
2h 22mdirect
C$ 192Alaska Airlines
3+ days ago
Fri, 4 Dec - Mon, 7 Dec
Alaska Airlines Logo
6:00 a.m. - 8:16 a.m.SFO  San Francisco-SEA Seattle/Tacoma Intl
2h 16mdirect
Alaska Airlines Logo
7:36 p.m. - 9:48 p.m.SEA  Seattle/Tacoma Intl-SFO San Francisco
2h 12mdirect
C$ 192Alaska Airlines
3+ days ago
Sat, 5 Dec - Tue, 8 Dec
Alaska Airlines Logo
9:45 a.m. - 12:02 p.m.SFO  San Francisco-SEA Seattle/Tacoma Intl
2h 17mdirect
Alaska Airlines Logo
1:36 p.m. - 3:47 p.m.SEA  Seattle/Tacoma Intl-SFO San Francisco
2h 11mdirect
C$ 192Alaska Airlines
3+ days ago
Wed, 2 Dec - Sat, 5 Dec
Alaska Airlines Logo
3:58 p.m. - 6:13 p.m.SFO  San Francisco-SEA Seattle/Tacoma Intl
2h 15mdirect
Alaska Airlines Logo
11:50 a.m. - 2:12 p.m.SEA  Seattle/Tacoma Intl-SFO San Francisco
2h 22mdirect
C$ 192Alaska Airlines
3+ days ago
Mon, 7 Dec - Thu, 10 Dec
Alaska Airlines Logo
3:58 p.m. - 6:13 p.m.SFO  San Francisco-SEA Seattle/Tacoma Intl
2h 15mdirect
Alaska Airlines Logo
8:51 p.m. - 11:02 p.m.SEA  Seattle/Tacoma Intl-SFO San Francisco
2h 11mdirect
C$ 192Alaska Airlines
3+ days ago
Tue, 17 Nov - Mon, 23 Nov
Alaska Airlines Logo
10:39 a.m. - 12:56 p.m.SFO  San Francisco-SEA Seattle/Tacoma Intl
2h 17mdirect
Alaska Airlines Logo
7:38 a.m. - 9:54 a.m.SEA  Seattle/Tacoma Intl-SFO San Francisco
2h 16mdirect
C$ 192Alaska Airlines
3+ days ago
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 round-trip flight from San Francisco to Seattle?

Round-trip flights from San Francisco to Seattle typically range from C$ 282 to C$ 559. The lowest price found in the past 5 days was C$ 185, 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, Tuesday is the cheapest day of the week to fly from San Francisco to Seattle. It's 6% 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 C$ 283 round-trip.
•July (C$ 464) and June (C$ 463) are the most expensive months.
•The price difference between flying in the cheapest and most expensive months is 64% 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 11 weeks before departure. Booking in this window typically costs about 59% less than the average last-minute fare (within 2 weeks of the flight), based on KAYAK data.

Expert advice

Expert advice for your flight from San Francisco to Seattle

 
KAYAK teamed up with top travel experts to share the best tips for your journey.
Our travel experts
Stefanie Waldek

Stefanie Waldek

Expert on Delta

Stefanie Waldek is a freelance space, travel, and design writer based in Saratoga Springs, NY. Her words have appeared in Space.com, Travel + Leisure, Condé Nast Traveler, Architectural Digest, and House Beautiful, among other publications. An expert in aviation and expedition cruising, Stefanie is frequently up in the air or on the sea, likely en route to Antarctica or the Arctic.

Harriet Baskas

Harriet Baskas

Expert on Alaska Airlines and SEA

Harriet is an award-winning journalist who is happiest in an airport or an unusual museum. Her stories about airports, air travel, and the business of travel have appeared on NBC News, CNBC, USA TODAY, The Points Guy and other outlets. She is the creator of the StuckatTheAirport.com blog and the author of nine books. When not out on the road or exploring the latest airport amenities, she’s home in Seattle getting ready for the next adventure.

Blane Bachelor

Blane Bachelor

Expert on SFO

Blane Bachelor is a journalist and editor specializing in travel and aviation who writes regularly for top global outlets. Born and raised in Florida, Blane has worked and lived in four countries, including the Netherlands, where she’s currently based with her family. Her favorite way to get to know a new destination is by running or riding a bike around town – or hearing a spooky ghost story about local history. She will always choose the window seat.

Key details for San Francisco to Seattle flights

Low season

February

Cheapest flight

C$ 110
Beat the crowds with an average 32% drop in traveller numbers.
The most popular month to fly with an average 27% 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 round-trip 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 6:00 am and lands at 8:17 am
    • Latest: departs at 10:35 pm and lands at 12:52 am.

    The flight takes about 2h 17m.

  • 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 does a flight from San Francisco to Seattle take?

    A direct flight from San Francisco to Seattle takes 2h 17m, 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 driver's licence.

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

    Round-trip flights from San Francisco to Seattle range from C$ 282 to C$ 559, with an average of C$ 408 over the past 12 months. Anything below C$ 282 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 70% above the C$ 408 route average. Book 11 weeks before departure for the lowest fares.

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

    On this route, layover flights are cheaper than direct options on average. Layover fares average C$ 362 round-trip via Ontario (ONT), compared to C$ 406 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 C$ 49–C$ 127 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 39% leaving in that window. Afternoon departures account for 34%, Evening flights for 22%, and Night flights for 5%.

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

    Yes. Based on fares seen in the past 5 days, round-trip prices on this route showed a wide range, from about C$ 185 to C$ 1,043. That means the highest observed fare was about 6x 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 program; 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 C$ 112, which is 61% below the typical average for this route.

  • What car rental options are available at Seattle/Tacoma Intl Airport (SEA)?

    Seattle/Tacoma Intl Airport (SEA) hosts 5 major car rental companies, with daily rates averaging C$ 86 for economy cars. Top options include:

    • Fox
    • Europcar
    • Thrifty
    • Budget
    • Hertz

  • 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) – 61% of one-stop connections
    • Ontario (ONT) – 22% of one-stop connections
    • Las Vegas Harry Reid Intl (LAS) – 17% 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 15% on flights from San Francisco to Seattle. Tuesday is the cheapest departure day at C$ 385 round-trip on average, while Sunday is the most expensive at C$ 448, a difference of C$ 63.

    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 layover airport when travelling from San Francisco to Seattle?

    Flying via Las Vegas Harry Reid Intl (LAS) gives the shortest average 1-stop total travel time at 9h 38m, compared with 11h 35m via Denver Intl (DEN) and 14h 45m via Ontario (ONT).

  • Which popular places can I visit in Seattle?

    Some of the most popular sights in Seattle are Lumen Field, T-Mobile Park, and Seattle Waterfront. 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 carry-on bag and a checked bag in Economy Class
    • United Airlines: a carry-on bag and a checked bag in Economy Class
    • Delta: a carry-on bag and a checked bag in Economy 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 Tuesday departure and avoid flying on Sunday. On this route, Tuesday flights average C$ 385, about C$ 63 less than Sunday fares (14% savings) based on the last 12 months.
  • For the best chance at a low fare, aim to book around 11 weeks before you fly. On this route, that window historically saves about 59% 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 C$ 283 round-trip in that month – typically C$ 182 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 Ontario Airport (ONT) can be cheaper than flying direct. The cheapest layover option averages C$ 362 round-trip on this route – about C$ 44 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.

    • Coast Gateway Hotel
    • Seattle Airport Marriott
    • 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?

 
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 nonstop 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 nonstop flights

More options for your flight from San Francisco to Seattle

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