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Cheap flights from San Francisco to Seattle from C$ 108

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 21/5. Fares are subject to change and may not be available on all flights or dates of travel.
SFO — SEA
4 May — 11 May1
1 adult

Cheapflights Tip: The best prices from San Francisco to Seattle/Tacoma Intl are usually found in October or January, booked 85 days in advance, depart on a Sunday or Tuesday and return on a Friday

Cheap flight deals from San Francisco to Seattle

Discover tips and strategies to find the most affordable flight options for your journey from San Francisco (SFO) to Seattle (SEA). 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 29 April 2025.

Round-trip from

C$ 209

One-way from

C$ 109

Popular in

July

Cheapest in

October

Average price

C$ 330

Good round-trip deal

C$ 478 or less
Alaska Airlines
  • Alaska Airlines
  • 20/5-20/5
  • 1 total stop
  • 7h 58m total
  • San Francisco to Seattle
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Delta
  • Delta
  • 12/6
  • Nonstop
  • 2h 19m total
  • San Francisco to Seattle
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Highest demand for flights based on searches. 14% potential increase in price (C$ 75 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease (C$ 10 potential savings vs. average RT price).
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Average for round-trip flights in April 2025
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Price to beat on a round-trip flight from San Francisco to Seattle/Tacoma Intl.
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Find flight deals from San Francisco to Seattle

Cheapest flights from San Francisco to Seattle
Explore the most affordable flight options available from San Francisco to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 29 April 2025.

Tue 20/57:00 a.m.SFO - SEA
Nonstop2h 09mAlaska Airlines
Tue 20/511:20 a.m.SEA - SFO
1 stop5h 05mAlaska Airlines
Deal found 28/4C$ 209
Sat 14/65:55 a.m.SFO - SEA
Nonstop2h 19mDelta
Wed 18/61:30 p.m.SEA - SFO
Nonstop2h 23mDelta
Deal found 28/4C$ 211
Sat 24/54:19 p.m.SFO - SEA
Nonstop2h 13mUnited Airlines
Tue 27/57:20 a.m.SEA - SFO
Nonstop2h 22mUnited Airlines
Deal found 28/4C$ 238
Mon 18/85:00 a.m.SFO - SEA
1 stop5h 25mSouthwest
Tue 19/84:10 p.m.SEA - SFO
1 stop5h 15mSouthwest
Deal found 28/4C$ 243
Sun 1/66:00 a.m.SFO - SEA
1 stop5h 24mHawaiian Airlines
Sun 8/67:00 a.m.SEA - SFO
Nonstop2h 15mHawaiian Airlines
Deal found 28/4C$ 263

Cheapflights Fare Finder

Customize your flight search to find flights from San Francisco to Seattle 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 629,999 searches. Data last updated 29 April 2025.
Use the filters below to find and compare flights from San Francisco to Seattle that are best for you.

Fly from

San Francisco

Fly to

Seattle

Route

Depart

Return

Price

San FranciscoSeattle

SFO - SEA

SFOSEA

San Francisco

Tue 20/5

7:00 a.m.-9:09 a.m.

Nonstop2h 09m

Seattle/Tacoma Intl

Tue 20/5

11:20 a.m.-4:25 p.m.

1 stop5h 05m

C$ 209

San FranciscoSeattle

SFO - SEA

SFOSEA

San Francisco

Sat 14/6

5:55 a.m.-8:14 a.m.

Nonstop2h 19m

Seattle/Tacoma Intl

Wed 18/6

1:30 p.m.-3:53 p.m.

Nonstop2h 23m

C$ 211

San FranciscoSeattle

SFO - SEA

SFOSEA

San Francisco

Sat 24/5

4:19 p.m.-6:32 p.m.

Nonstop2h 13m

Seattle/Tacoma Intl

Tue 27/5

7:20 a.m.-9:42 a.m.

Nonstop2h 22m

C$ 238

San FranciscoSeattle

SFO - SEA

SFOSEA

San Francisco

Mon 18/8

5:00 a.m.-10:25 a.m.

1 stop5h 25m

Seattle/Tacoma Intl

Tue 19/8

4:10 p.m.-9:25 p.m.

1 stop5h 15m

C$ 243

San FranciscoSeattle

SFO - SEA

SFOSEA

San Francisco

Sun 1/6

6:00 a.m.-11:24 a.m.

1 stop5h 24m

Seattle/Tacoma Intl

Sun 8/6

7:00 a.m.-9:15 a.m.

Nonstop2h 15m

C$ 263

San FranciscoSeattle

SFO - SEA

SFOSEA

San Francisco

Wed 21/5

5:25 p.m.-10:59 p.m.

1 stop5h 34m

C$ 108

San FranciscoSeattle

SFO - SEA

SFOSEA

San Francisco

Mon 19/5

6:10 a.m.-8:30 a.m.

Nonstop2h 20m

C$ 109

San FranciscoSeattle

SFO - SEA

SFOSEA

San Francisco

Fri 13/6

7:15 p.m.-12:30 a.m.

1 stop5h 15m

C$ 123

San FranciscoSeattle

SFO - SEA

SFOSEA

San Francisco

Sat 24/5

4:19 p.m.-6:32 p.m.

Nonstop2h 13m

C$ 144

San FranciscoSeattle

SFO - SEA

SFOSEA

San Francisco

Thu 25/9

3:03 p.m.-9:36 p.m.

1 stop6h 33m

C$ 159

Flights are sorted by cheapest round-trip flights first.

Deals found on 28/4

Best time to book a flight from San Francisco to Seattle

Have a flexible travel schedule? Discover the best time to fly to Seattle from San Francisco with our price prediction graph.
Estimated round-trip 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 San Francisco to Seattle

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

Use this chart to determine the optimal time to book a round-trip flight from San Francisco to Seattle. Price data was last updated on 25 April 2025.

The price you pay for your flight from San Francisco to Seattle may vary depending on when you book. For the best chance of a lower fare, look to book 85 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

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

Currently, January is the cheapest month in which you can book a flight from San Francisco to Seattle (average of C$ 261). Flying from San Francisco to Seattle in December is currently the most expensive (average of C$ 353). 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 SFO to SEA?

Find hourly flight availability from San Francisco to Seattle. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 29 April 2025.

It’s typically best to fly out from San Francisco to Seattle at noon. Doing so could potentially save you 60% on the flight price compared to flying in the evening, which is usually more expensive.

Weekly flight availability from San Francisco to Seattle

Explore weekly flight availability from San Francisco to Seattle. 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 29 April 2025.

The most flights from SFO to SEA are scheduled on a Monday (113 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (72 on average).

Rainfall in Seattle by month

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

In terms of precipitation, rainfall in Seattle ranges from 18.0 - 168.0 mm per month. November is typically the wettest month, when rainfall can reach 168.0 mm. July is typically the driest time to visit Seattle when rainfall is around 18.0 mm.

Temperature in Seattle by month

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

If weather is an important factor for your trip to Seattle, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 19.0 C. Travellers hoping to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 5.0 C).

Reviews of airlines servicing Seattle

Get insights into the airlines that provide service to Seattle. 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 Seattle. Reviews last updated 29 April 2025.
To help decide which airline to fly from San Francisco to Seattle, see what other customers have to say about Alaska Airlines, Southwest and Delta. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
9,949 reviews
Check prices

Overall

8.0

Crew

8.5

Entertainment

7.1

Boarding

8.2

Food

7.1

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
Alaska Airlines
8.0
Very good
9,949 reviews
Alaska Airlines
8.0
Very good
9,949 reviews
Check prices

Overall

8.0

Crew

8.5

Entertainment

7.1

Boarding

8.2

Food

7.1

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
Southwest
8.0
Very good
4,292 reviews
Alaska Airlines
8.0
Very good
9,949 reviews
Check prices

Overall

8.0

Crew

8.5

Entertainment

7.1

Boarding

8.2

Food

7.1

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
Delta
8.0
Very good
7,929 reviews
Alaska Airlines
8.0
Very good
9,949 reviews
Check prices

Overall

8.0

Crew

8.5

Entertainment

7.1

Boarding

8.2

Food

7.1

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
Hawaiian Airlines
7.9
Good
2,402 reviews
Alaska Airlines
8.0
Very good
9,949 reviews
Check prices

Overall

8.0

Crew

8.5

Entertainment

7.1

Boarding

8.2

Food

7.1

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
United Airlines
7.4
Good
8,696 reviews
Alaska Airlines
8.0
Very good
9,949 reviews
Check prices

Overall

8.0

Crew

8.5

Entertainment

7.1

Boarding

8.2

Food

7.1

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

Related info for your journey

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

  • What airports do I use to fly from San Francisco to Seattle?

    Booking a flight from San Francisco (SFO) to Seattle/Tacoma Intl (SEA) is your only option if you wish to fly from San Francisco to Seattle. On a typical day, there are 88 flights from San Francisco to Seattle/Tacoma Intl, all of which are around 2h 22m for a nonstop flight. You can also purchase a plane ticket from 1 airline when you book a flight from San Francisco to Seattle.

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

    This flight path from San Francisco to Seattle/Tacoma Intl was viewed by 33 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 San Francisco to Seattle round-trip?

    Cheapflights users have booked flights from San Francisco to Seattle round-trip from C$ 209. Other airlines that can offer you cheap pricing are Delta, from C$ 211, and United Airlines, from C$ 252. Alaska Airlines is priced at 37% lower than the current average price of a flight leaving 3 months from now.

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

    C$ 109 is the cheapest one-way deal found within the past few days, from Delta. You may also be able to find cheap deals on Alaska Airlines and Southwest, with prices starting from C$ 122 and C$ 123, respectively.

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

    No one likes to see their flight delayed. When booking a flight from San Francisco to Seattle consider choosing Aeromexico (97%), Delta (93%) or Copa Airlines (90%) as they are the most reliable in getting you off to your destination on time.

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

    Looking for the cheapest flight from San Francisco to Seattle? While on average our users pay C$ 639, our data indicates the cheapest price to be C$ 286. The most popular route (San Francisco - Seattle/Tacoma Intl), is priced around C$ 538.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from San Francisco to Seattle 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 San Francisco to Seattle?

    Currently, January is the cheapest month in which you can book a flight from San Francisco to Seattle (average of C$ 261). Flying from San Francisco to Seattle in December is currently the most expensive (average of C$ 353). 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
Tukwila
SeaTac
Tacoma
Marysville
Bothell
Olympia
Lynnwood
Leavenworth

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Top airline flying from San Francisco to Seattle

Discover the top airline that operate flights from San Francisco to Seattle. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 629,999 searches. Data last updated 29 April 2025.
AirlineCheapestAverageFlexibilityOn-time
Alaska AirlinesCheapestC$ 187AverageC$ 286FlexibilityNo cancel feeOn-time75%
Search Alaska Airlines flights

Fly with Cheapflights

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

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

Deals for San Francisco to Seattle flights are sourced from 900+ travel sites when you use Cheapflights. When all flight results come back, Cheapflights lets you sort and filter flights using different criteria to choose better, like price, airport, cabin class, and plenty of other options.

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

Cheapflights helps you find that perfect flight to Seattle from San Francisco by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

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

Need flexible booking options for your flight to Seattle from San Francisco? Don’t worry, Cheapflights have you covered. Use our search filter to only show flights with no change fees.

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

Yes! Start tracking prices for San Francisco to Seattle flights today and get alerted whenever prices for these flights change. To access this feature, click the bell icon next to the flight deals above, which will prompt you for a valid email address to receive your alerts.

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