Find flights
Deals
When to book
FAQs

Cheap flights from Seattle to San Francisco from $109

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 7/12. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — SFO
20 Nov — 27 Nov1
1 adult
1 adult, Economy

Cheapflights Tip: The best prices from Seattle/Tacoma Intl to San Francisco are usually found in January or February, booked 78 days in advance, depart on a Saturday or Tuesday and return on a Thursday

Cheap flight deals from Seattle to San Francisco

Discover tips and strategies to find the most affordable flight options for your journey from Seattle (SEA) to San Francisco (SFO). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 21 October 2025.

Round-trip from

$189

One-way from

$109

Popular in

December

Cheapest in

January

Average price

$387

Good one-way deal

$941 or less
Alaska Airlines
  • Alaska Airlines
  • 2/2-9/2
  • 1 total stop
  • 14h 28m total
  • Seattle to San Francisco
Search Deals
Southwest
  • Southwest
  • 7/12
  • 1 total stop
  • 8h 30m total
  • Seattle to San Francisco
Search Deals
Highest demand for flights based on searches. 1% potential increase in price ($9 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($9 potential savings vs. average return price).
Search Deals
Average for round-trip flights in October 2025
Search Deals
Price to beat on a one-way flight from Seattle/Tacoma Intl to San Francisco.
Search Deals

Find flight deals from Seattle to San Francisco

Enter your travel dates to find the best prices.

Cheapest flights from Seattle to San Francisco
Explore the most affordable flight options available from Seattle to San Francisco. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 21 October 2025.

Sat 6/1209:45SEA - SFO
1 stop6h 54mAlaska Airlines
Sun 7/1207:35SFO - SEA
Nonstop2h 17mAlaska Airlines
Deal found 20/10$192
Fri 5/1214:20SEA - SFO
1 stop8h 10mSouthwest
Wed 10/1214:35SFO - SEA
1 stop7h 55mSouthwest
Deal found 19/10$194
Mon 17/1114:40SEA - SFO
Nonstop2h 14mUnited Airlines
Mon 24/1122:44SFO - SEA
Nonstop2h 15mUnited Airlines
Deal found 19/10$195
Sat 6/1212:20SEA - SFO
1 stop8h 00mSouthwest
Sun 7/1210:40SFO - SEA
1 stop7h 25mSouthwest
Deal found 20/10$201
Thu 4/1219:21SEA - SFO
Nonstop2h 13mAlaska Airlines
Thu 11/1208:00SFO - SEA
1 stop3h 49mAlaska Airlines
Deal found 19/10$203
Tue 23/1207:05SEA - SFO
Nonstop2h 24mUnited Airlines
Wed 14/109:05SFO - SEA
Nonstop2h 25mUnited Airlines
Deal found 18/10$206
Thu 4/1214:20SEA - SFO
1 stop8h 10mSouthwest
Mon 8/1205:05SFO - SEA
1 stop7h 00mSouthwest
Deal found 20/10$209
Thu 13/1113:31SEA - SFO
Nonstop2h 12mAlaska Airlines
Thu 13/1120:43SFO - SEA
Nonstop2h 23mAlaska Airlines
Deal found 19/10$211
Sat 6/1208:22SEA - SFO
1 stop8h 17mAlaska Airlines
Sun 21/1222:45SFO - SEA
Nonstop2h 16mAlaska Airlines
Deal found 20/10$223
Fri 5/1214:20SEA - SFO
1 stop8h 10mSouthwest
Sun 7/1210:40SFO - SEA
1 stop7h 25mSouthwest
Deal found 19/10$224

Cheapflights Fare Finder

 
Customise your flight search to find flights from Seattle to San Francisco 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, Cheapflights users made 647,157 searches. Data last updated 21 October 2025.
Use the filters below to find and compare flights from Seattle to San Francisco that are best for you.

Fly from

Seattle

Fly to

San Francisco

Route

Depart

Return

Price

SeattleSan Francisco

SEA - SFO

SEASFO

Seattle/Tacoma Intl

Tue 24/2

07:00-09:11

Nonstop2h 11m

San Francisco

Tue 24/2

12:49-20:05

1 stop7h 16m

$191

SeattleSan Francisco

SEA - SFO

SEASFO

Seattle/Tacoma Intl

Tue 23/12

22:15-00:32

Nonstop2h 17m

San Francisco

Wed 14/1

18:25-20:41

Nonstop2h 16m

$195

SeattleSan Francisco

SEA - SFO

SEASFO

Seattle/Tacoma Intl

Tue 16/12

12:45-16:24

1 stop3h 39m

San Francisco

Tue 16/12

19:25-21:43

Nonstop2h 18m

$201

SeattleSan Francisco

SEA - SFO

SEASFO

Seattle/Tacoma Intl

Wed 10/12

12:45-19:45

1 stop7h 00m

San Francisco

Thu 11/12

19:25-21:43

Nonstop2h 18m

$211

SeattleSan Francisco

SEA - SFO

SEASFO

Seattle/Tacoma Intl

Thu 13/11

09:35-16:22

1 stop6h 47m

San Francisco

Mon 17/11

08:00-10:23

Nonstop2h 23m

$211

SeattleSan Francisco

SEA - SFO

SEASFO

Seattle/Tacoma Intl

Sun 1/2

11:30-19:12

1 stop7h 42m

San Francisco

Sun 8/2

09:00-11:21

Nonstop2h 21m

$211

SeattleSan Francisco

SEA - SFO

SEASFO

Seattle/Tacoma Intl

Fri 12/12

12:45-18:27

1 stop5h 42m

San Francisco

Mon 15/12

12:22-14:38

Nonstop2h 16m

$211

SeattleSan Francisco

SEA - SFO

SEASFO

Seattle/Tacoma Intl

Wed 3/12

07:45-14:53

1 stop7h 08m

San Francisco

Wed 10/12

12:22-14:38

Nonstop2h 16m

$211

SeattleSan Francisco

SEA - SFO

SEASFO

Seattle/Tacoma Intl

Wed 12/11

11:10-16:21

1 stop5h 11m

San Francisco

Wed 19/11

09:00-11:24

Nonstop2h 24m

$211

SeattleSan Francisco

SEA - SFO

SEASFO

Seattle/Tacoma Intl

Mon 17/11

11:10-16:21

1 stop5h 11m

San Francisco

Mon 17/11

20:43-23:06

Nonstop2h 23m

$211

Flights are sorted by cheapest return flights first.

Deals found on 20/10

Showing 1-10 of 22 results
1
2
3

Best time to book a flight from Seattle to San Francisco

Have a flexible travel schedule? Discover the best time to fly to San Francisco from Seattle with our price prediction graph.
Estimated return price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Seattle to San Francisco

How far ahead should I book a flight from Seattle to San Francisco?

Use this chart to determine the optimal time to book a return flight from Seattle to San Francisco. Price data was last updated on 17 October 2025.

Booking 58 days in advance of your planned departure date is, on average, the best time to get cheap flights from Seattle to San Francisco. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

What is the cheapest month to book a flight from Seattle to San Francisco?

Currently, February is the cheapest month in which you can book a flight from Seattle to San Francisco (average of $141). Flying from Seattle to San Francisco in May is currently the most expensive (average of $211). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from SEA to SFO?

Find hourly flight availability from Seattle to San Francisco. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 21 October 2025.

One of the essential ways to save on airfare from Seattle to San Francisco is to remain as flexible as possible. Flights that are in the evening tend to be the most expensive. A flight at midday could potentially save you up to 93% on airfare.

Related info for your journey

Find useful and relevant information for your journey from Seattle to San Francisco. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How popular is this Seattle to San Francisco flight route?

    This flight path from Seattle/Tacoma Intl to San Francisco was viewed by 48 users in the past month. Keep an eye out for changes in search interest prior to high and low season.

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

    For as low as $191, Alaska Airlines can have you in San Francisco from Seattle in 2h 11m. Airlines will cover a distance of 1093 km. All flights are typically direct.

  • What are the most reliable airlines from Seattle to San Francisco?

    The top 3 most reliable airlines when flying from Seattle to San Francisco are Horizon Air (100%), SWISS (96%) and Turkish Airlines (94%).

  • What are the cheapest flights from Seattle to San Francisco?

    Looking for the cheapest flight from Seattle to San Francisco? While on average our users pay $968, our data indicates the cheapest price to be $616. The most popular route (Seattle/Tacoma Intl - San Francisco), is priced around $172.

  • Can I find deals for flights from Seattle to San Francisco that include hotel bookings?

    Yes. In addition to deals on Seattle to San Francisco flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Seattle to San Francisco?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Seattle to San Francisco.

  • Can I find deals for business class flights from Seattle to San Francisco?

    Yes. Cheapflights offers flight deals from Seattle to San Francisco by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Seattle to San Francisco?

    Currently, February is the cheapest month in which you can book a flight from Seattle to San Francisco (average of $141). Flying from Seattle to San Francisco in May is currently the most expensive (average of $211). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Travelling to a place near San Francisco?

Book flights to San Francisco if you plan to visit one of these locations
Sausalito
Santa Cruz
Los Gatos
Mountain View
Davis
Emeryville
Milpitas

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Seattle to San Francisco

See prices for flight routes from nearby airports that may be better suited for you.
Portland to Los Angeles flights
Seattle to Los Angeles flights
Seattle to Las Vegas flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Seattle to San Francisco?

When you search for this flight from Seattle to San Francisco, Cheapflights searches on 900+ travel sites to save you time finding great flight deals online. Additionally, we offer filter features so you can choose a preferred cabin class or airline, see different price ranges, and much more so you can book the flight for you.

Why should you use Cheapflights to find cheap flight tickets from Seattle to San Francisco?

Millions of users choose and trust Cheapflights to book the best flight deals from Seattle to San Francisco for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.

Can Cheapflights find flights from Seattle to San Francisco with no change fees?

Certainly. Search results for flights to San Francisco from Seattle shown to you on Cheapflights can be narrowed down with different useful search filters, which includes flexible booking options.

Can Cheapflights notify me if prices for flights from Seattle to San Francisco become cheaper?

Not ready to book yet? You can track prices for flights from Seattle to San Francisco on Cheapflights with our Price Alert feature and get notified when better prices are available.

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.