SFO - SEA

£58 Find Cheap Flights from San Francisco to Seattle – Compare and Save

1 adult
1 adult, Economy, 0 bags

Save 25% or more on flights. Compare deals from all over the web.

Never overpay with our price tracking tools.

Filter searches by price, airline and more to find your best flights.

Everything you should know

Cheapest return flight
£101
Typical prices: £149-£286
United Airlines
Tue 16/10Wed 17/10
SFO - SEA • Direct
Cheapest one-way flight
£58
Typical prices: £98-£211
Alaska Airlines
Wed 5/12
SFO - SEA • Direct
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 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 £130 (return)
Shortest trip • 13h 10m (one-way)
Insights
Insights
Start a new search
KAYAK searches hundreds of sites at once to find you the best travel deals.
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 return flight deals from San Francisco to Seattle

Fri, 16 Oct - Sat, 17 Oct
United Airlines Logo
21:07 - 23:26SFO  San Francisco-SEA Seattle/Tacoma Intl
2h 19mdirect
United Airlines Logo
13:22 - 15:37SEA  Seattle/Tacoma Intl-SFO San Francisco
2h 15mdirect
£101United Airlines
Sat, 17 Oct - Sun, 18 Oct
United Airlines Logo
21:07 - 23:27SFO  San Francisco-SEA Seattle/Tacoma Intl
2h 20mdirect
United Airlines Logo
07:00 - 09:19SEA  Seattle/Tacoma Intl-SFO San Francisco
2h 19mdirect
£101United Airlines
Tue, 17 Nov - Tue, 17 Nov
United Airlines Logo
12:22 - 14:39SFO  San Francisco-SEA Seattle/Tacoma Intl
2h 17mdirect
United Airlines Logo
19:35 - 21:50SEA  Seattle/Tacoma Intl-SFO San Francisco
2h 15mdirect
£101United Airlines
Thu, 15 Oct - Sat, 17 Oct
United Airlines Logo
21:07 - 23:26SFO  San Francisco-SEA Seattle/Tacoma Intl
2h 19mdirect
United Airlines Logo
09:05 - 11:24SEA  Seattle/Tacoma Intl-SFO San Francisco
2h 19mdirect
£101United Airlines
Mon, 23 Nov - Fri, 27 Nov
United Airlines Logo
18:30 - 20:47SFO  San Francisco-SEA Seattle/Tacoma Intl
2h 17mdirect
United Airlines Logo
20:35 - 23:00SEA  Seattle/Tacoma Intl-SFO San Francisco
2h 25mdirect
£101United Airlines
Fri, 16 Oct - Sun, 18 Oct
United Airlines Logo
21:07 - 23:26SFO  San Francisco-SEA Seattle/Tacoma Intl
2h 19mdirect
United Airlines Logo
09:05 - 11:24SEA  Seattle/Tacoma Intl-SFO San Francisco
2h 19mdirect
£101United Airlines
Fri, 16 Oct - Sun, 18 Oct
United Airlines Logo
21:07 - 23:26SFO  San Francisco-SEA Seattle/Tacoma Intl
2h 19mdirect
United Airlines Logo
07:00 - 09:19SEA  Seattle/Tacoma Intl-SFO San Francisco
2h 19mdirect
£101United Airlines
Thu, 29 Oct - Sun, 1 Nov
United Airlines Logo
16:17 - 18:33SFO  San Francisco-SEA Seattle/Tacoma Intl
2h 16mdirect
United Airlines Logo
07:00 - 09:19SEA  Seattle/Tacoma Intl-SFO San Francisco
2h 19mdirect
£101United Airlines
Thu, 15 Oct - Mon, 19 Oct
Alaska Airlines Logo
08:20 - 14:17SFO  San Francisco-SEA Seattle/Tacoma Intl
5h 57m1 stop San Diego
Alaska Airlines Logo
21:36 - 23:52SEA  Seattle/Tacoma Intl-SFO San Francisco
2h 16mdirect
£111Alaska Airlines
Sat, 24 Oct - Sat, 7 Nov
Alaska Airlines Logo
13:51 - 16:04SFO  San Francisco-SEA Seattle/Tacoma Intl
2h 13mdirect
Alaska Airlines Logo
13:03 - 20:16SEA  Seattle/Tacoma Intl-SFO San Francisco
7h 13m1 stop San Diego
£111Alaska 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 from San Francisco to Seattle with more confidence.

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

Return flights from San Francisco to Seattle start at £101. Prices are below average for this route right now, with typical return fares ranging from £149 to £286. The lowest price found in the past 5 days was £101 on United Airlines.

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

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

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 £144 return.
  • July (£246) and June (£243) 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 prices 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.

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
Blane Bachelor

Blane Bachelor

Expert on SFO

Blane Bachelor is a journalist and editor specialising 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 favourite 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.

Harriet Baskas

Harriet Baskas

Expert on 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, 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.

Key details for San Francisco to Seattle flights

Low season

February

Cheapest flight

£58
Best time to beat the crowds (33% less expensive on average)
Most popular time to fly (14% more expensive on average)
Flights 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 route details based on KAYAK data, including flight times, airports, airlines, and booking questions.

  • 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.

  • 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 are available on the route 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

  • 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).

  • 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
    • Delta: a cabin bag and a checked bag in Economy class

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

  • 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 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 £130 return via Las Vegas Harry Reid Intl (LAS), compared with £215 for direct.

  • 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 £26–£74 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.

  • 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

    Denver Intl (DEN) handles the largest share of one-stop connections on this route.

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

    Yes. Being flexible with your travel dates can save you up to 16% on the San Francisco to Seattle route. Wednesday is the cheapest departure day at £199 return on average, while Sunday is the most expensive at £236, a difference of £37. KAYAK's flexible dates feature shows options up to 3 days before and after your selected dates, making it easier to compare nearby fares.

  • 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 3 months, with delays averaging 2 hours 15 minutes.

  • 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 37% leaving in that window. Afternoon departures account for 32%, Evening flights for 26%, and Night flights for 5%.

  • What popular places can I visit in Seattle?

    Some of the most popular sights in Seattle are Pier 66, The Westin Seattle, and Seattle Center. These are among the most viewed places in Seattle on KAYAK.

  • 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 08:17
    • Latest: departs at 22:45 and lands at 01:02.

    The flight takes about 2h 17m.

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

    Last-minute fares on this route (booked within 2 weeks of departure) run 53% above the route average of £215. Book 24 weeks before departure for the lowest fares.

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

    A direct flight from San Francisco to Seattle takes 2h 17m, covering 679 miles.

  • 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 a real ID-compliant driver's license, a state ID, or another TSA-accepted form of identification.

  • 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 £101 to £560. That means the highest observed fare was about 6x higher than the lowest one.

  • 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 £58, which is 59% below the typical average for this route.

  • How does United Airlines's on-time performance compare to other airlines on San Francisco to Seattle flights?

    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: 84% on time
    • Alaska Airlines: 80% on time

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

  • How do delay rates compare for morning and evening flights from San Francisco to Seattle?

    Morning flights have the fewest delays on this route. Delays tend to pile up throughout the day as one late flight pushes the next, so earlier departures are usually more reliable.

  • 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).

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

    Seattle/Tacoma Intl Airport (SEA) hosts 5 major car hire companies, with daily rates starting from around £3 for economy cars. Top options include:
    • Fox
    • Europcar
    • Thrifty
    • Budget
    • Dollar

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

    Return flights from San Francisco to Seattle range from £149 to £286, with an average of £215 over the past 12 months. Anything below £149 counts as a good deal.

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

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

    • • Alaska Airlines
    • • Delta
    • • 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.

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 instead of Sunday. On this route, Wednesday flights average £199 – about £37 less than Sunday (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 £144 return in that month – typically £102 less than the most expensive month, which is July (based on the last 12 months).
  • If arriving on time is high on your priority list, United Airlines is the strongest pick on this route. 84% of United Airlines flights from San Francisco to Seattle arrived on time in the past 3 months, slightly above the route's average on-time arrival rate of 82%. When flights on this route do arrive late, the average delay is 2 hours15 minutes, so choosing an airline with strong on-time performance can make a difference on tight schedules.
  • 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 £130 return on this route – about £85 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?

 
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