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Cheap flights from Seattle to San Francisco from $121

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 5/9. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — SFO
18 Jun — 25 Jun1
1 adult

Cheapflights Tip: The best prices from Seattle/Tacoma Intl to San Francisco are usually found in September or January, booked 88 days in advance, depart on a Friday or Tuesday and return on a Wednesday

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 13 June 2025.

Round-trip from

$241

One-way from

$121

Popular in

June

Cheapest in

September

Average price

$421

Good one-way deal

$120 or less
Delta
  • Delta
  • 19/9-21/9
  • Nonstop
  • 4h 38m total
  • Seattle to San Francisco
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Alaska Airlines
  • Alaska Airlines
  • 5/9
  • Nonstop
  • 2h 19m total
  • Seattle to San Francisco
Search Deals
Highest demand for flights based on searches. 6% potential increase in price ($34 potential increase over avg. return price).
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Cheapest flight prices on average. 1% potential price decrease ($10 potential savings vs. average return price).
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Average for round-trip flights in June 2025
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Price to beat on a one-way flight from Seattle/Tacoma Intl to San Francisco.
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Find flight deals from Seattle to San Francisco

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 13 June 2025.

Fri 19/920:10SEA - SFO
Nonstop2h 20mDelta
Sun 21/906:05SFO - SEA
Nonstop2h 18mDelta
Deal found 13/6$241
Sat 16/812:31SEA - SFO
1 stop6h 22mAlaska Airlines
Sun 31/806:00SFO - SEA
Nonstop2h 07mAlaska Airlines
Deal found 12/6$256
Fri 26/917:30SEA - SFO
1 stop5h 10mSouthwest
Mon 29/917:15SFO - SEA
1 stop7h 00mSouthwest
Deal found 13/6$272
Sun 27/707:05SEA - SFO
Nonstop2h 11mHawaiian Airlines
Tue 29/719:49SFO - SEA
Nonstop2h 11mHawaiian Airlines
Deal found 10/6$370
Thu 7/805:25SEA - SFO
1 stop3h 24mMultiple Airlines
Mon 11/807:00SFO - SEA
Nonstop2h 05mMultiple Airlines
Deal found 12/6$413
Mon 14/705:10SEA - SFO
Nonstop2h 12mUnited Airlines
Thu 17/706:30SFO - SEA
Nonstop2h 18mUnited Airlines
Deal found 11/6$419

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 13 June 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

Fri 19/9

20:10-22:30

Nonstop2h 20m

San Francisco

Sun 21/9

06:05-08:23

Nonstop2h 18m

$241

SeattleSan Francisco

SEA - SFO

SEASFO

Seattle/Tacoma Intl

Sat 16/8

12:31-18:53

1 stop6h 22m

San Francisco

Sun 31/8

06:00-08:07

Nonstop2h 07m

$256

SeattleSan Francisco

SEA - SFO

SEASFO

Seattle/Tacoma Intl

Fri 26/9

17:30-22:40

1 stop5h 10m

San Francisco

Mon 29/9

17:15-00:15

1 stop7h 00m

$272

SeattleSan Francisco

SEA - SFO

SEASFO

Seattle/Tacoma Intl

Sun 27/7

07:05-09:16

Nonstop2h 11m

San Francisco

Tue 29/7

19:49-22:00

Nonstop2h 11m

$370

SeattleSan Francisco

SEA - SFO

SEASFO

Seattle/Tacoma Intl

Thu 7/8

05:25-08:49

1 stop3h 24m

San Francisco

Mon 11/8

07:00-09:05

Nonstop2h 05m

$413

SeattleSan Francisco

SEA - SFO

SEASFO

Seattle/Tacoma Intl

Mon 14/7

05:10-07:22

Nonstop2h 12m

San Francisco

Thu 17/7

06:30-08:48

Nonstop2h 18m

$419

SeattleSan Francisco

SEA - SFO

SEASFO

Seattle/Tacoma Intl

Fri 5/9

21:40-23:59

Nonstop2h 19m

$121

SeattleSan Francisco

SEA - SFO

SEASFO

Seattle/Tacoma Intl

Tue 5/8

16:10-21:25

1 stop5h 15m

$137

SeattleSan Francisco

SEA - SFO

SEASFO

Seattle/Tacoma Intl

Sat 9/8

22:05-00:19

Nonstop2h 14m

$140

SeattleSan Francisco

SEA - SFO

SEASFO

Seattle/Tacoma Intl

Tue 8/7

07:20-15:02

1 stop7h 42m

$172

Flights are sorted by cheapest return flights first.

Deals found on 10/6

Showing 1-10 of 11 results
1
2

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 9 June 2025.

Booking 50 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, March is the cheapest month in which you can book a flight from Seattle to San Francisco (average of $876). Flying from Seattle to San Francisco in December is currently the most expensive (average of $1,375). 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 13 June 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 afternoon tend to be the most expensive. A flight in the morning could potentially save you up to 86% on airfare.

Weekly flight availability from Seattle to San Francisco

Explore weekly flight availability from Seattle to San Francisco. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated 13 June 2025.

The most flights from SEA to SFO are scheduled on a Thursday (124 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (41 on average).

Rainfall in San Francisco by month

Plan your trip to San Francisco by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in San Francisco ranges from 0.0 - 112.0 inches per month. January is typically the wettest month, when rainfall can reach 112.0 mm. July is typically the driest time to visit San Francisco when rainfall is around 0.0 mm.

Temperature in San Francisco by month

Plan your trip to San Francisco by taking into account the average temperature totals by month.

If weather is an important factor for your trip to San Francisco, use this chart to help with planning. For those seeking warmer temperatures, September is the ideal time of year to visit, when temperatures reach an average of 17.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 11.0 C).

Reviews of airlines servicing San Francisco

Get insights into the airlines that provide service to San Francisco. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to San Francisco. Reviews last updated 13 June 2025.
See what other customers who have flown with Alaska Airlines, Southwest and Delta from Seattle to San Francisco have to say. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very Good
10,000 reviews
Check prices

Food

7.1

Boarding

8.1

Crew

8.5

Entertainment

7.1

Comfort

7.8

Overall

8.0

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Alaska Airlines
8.0
Very Good
10,000 reviews
Alaska Airlines
8.0
Very Good
10,000 reviews
Check prices

Food

7.1

Boarding

8.1

Crew

8.5

Entertainment

7.1

Comfort

7.8

Overall

8.0

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Southwest
8.0
Very Good
4,287 reviews
Alaska Airlines
8.0
Very Good
10,000 reviews
Check prices

Food

7.1

Boarding

8.1

Crew

8.5

Entertainment

7.1

Comfort

7.8

Overall

8.0

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Delta
8.0
Very Good
7,950 reviews
Alaska Airlines
8.0
Very Good
10,000 reviews
Check prices

Food

7.1

Boarding

8.1

Crew

8.5

Entertainment

7.1

Comfort

7.8

Overall

8.0

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Hawaiian Airlines
7.9
Good
2,494 reviews
Alaska Airlines
8.0
Very Good
10,000 reviews
Check prices

Food

7.1

Boarding

8.1

Crew

8.5

Entertainment

7.1

Comfort

7.8

Overall

8.0

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
United Airlines
7.4
Good
8,790 reviews
Alaska Airlines
8.0
Very Good
10,000 reviews
Check prices

Food

7.1

Boarding

8.1

Crew

8.5

Entertainment

7.1

Comfort

7.8

Overall

8.0

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

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 35 users in the past month. Keep an eye out for changes in search interest prior to high and low season.

  • What are the cheapest airlines flying from Seattle to San Francisco round-trip?

    Cheapflights users have booked flights from Seattle to San Francisco round-trip from $241. Other airlines that can offer you cheap pricing are Alaska Airlines, from $256, and Southwest, from $272. Delta is currently priced 32% below the average price you’ll pay for this route.

  • What are the cheapest airlines to fly from Seattle to San Francisco one-way?

    For one-way options, check prices for Alaska Airlines. According to our data, you can fly for as low as $121. Users have also found prices from $137 and $140 on Southwest and Delta, respectively.

  • 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%), WestJet (90%) and Aeromexico (88%).

  • 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 $1,076, our data indicates the cheapest price to be $101. The most popular route (Seattle/Tacoma Intl - San Francisco), is priced around $316.

  • 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, March is the cheapest month in which you can book a flight from Seattle to San Francisco (average of $876). Flying from Seattle to San Francisco in December is currently the most expensive (average of $1,375). 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 Seattle?

Book flights to Seattle if you plan to visit one of these locations
Sunnyvale
Los Gatos
Davis
Mountain View
Emeryville
Stanford
Sausalito
Daly City

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Alternative routes for Seattle to San Francisco

See prices for flight routes from nearby airports that may be better suited for you.
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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.

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