How popular is this San Francisco to Seattle flight route?

Within the past month, 131 users have taken a look at flights from San Francisco to Seattle/Tacoma Intl.

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

Our cheapest airline available from San Francisco to Seattle is Alaska Airlines. Our recent data shows that you can find tickets from as low as $139 on this airline. Additional options worth looking into are Hawaiian Airlines and Frontier, starting at $141 and $145 round-trip. Alaska Airlines is currently priced 42% below the average price you’ll pay for this route.

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

To fly one-way, consider booking your trip with United Airlines, which is currently one of the cheapest options available, starting at $69. Alaska Airlines flights start at $74 while deals on Frontier start at $75 one-way.

In terms of precipitation, rainfall in Seattle ranges from 0.7 - 6.6 inches per month. November is typically the wettest month, when rainfall can reach 6.6 in. July is typically the driest time to visit Seattle when rainfall is around 0.7 in.

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 66.2 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 41.0 F).

What are the cheapest flights from San Francisco to Seattle?

While on average a flight from San Francisco to Seattle is generally $1,222, our data shows the cheapest flight currently is $99. When looking at the most popular route, (San Francisco - Seattle/Tacoma Intl), you can expect to pay $131 for that flight.

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

Before booking your flight to Seattle from San Francisco, check out the most reliable airlines to get you to your destination on time: Copa Airlines (100%), Aeromexico (97%), WestJet( 90%).

What are the most popular airlines that fly from San Francisco to Seattle?

American Airlines, Alaska Airlines and Delta are the most popular airlines when flying from San Francisco to Seattle.

What is the cheapest day to fly round-trip from San Francisco to Seattle?

Travelers have found that booking a Thursday departure is the best way to save up to 45% on the cost of booking your flights compared to booking on days of the week where this route is of high demand.

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

When searching for a good deal, it’s best to be prepared for potential fluctuations in price. We recommend booking at least 54 days in advance, which can save you up to 178% on flights from San Francisco to Seattle compared to booking the week you need them. Waiting 54 days out may not be for everyone, so we have options available for flights within the next two weeks, with the lowest price starting at $380. For sooner than that we have options available in the next 3 days from $526.

What is the cheapest month to fly from San Francisco to Seattle?

Due to multiple factors, expect to potentially pay more when booking in June. For low rates, October can be a great choice for travel to Seattle. Flights to Seattle from San Francisco in October are about $241 on average during October, but can be found for as low as $115.

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

Seattle/Tacoma Intl is the airport most travelers will use when flying to Seattle from San Francisco. Booking flights from San Francisco (SFO) to Seattle/Tacoma Intl (SEA) should be relatively easy as there are 71 daily flights to Seattle from 7 different airlines. 1h 56m is how long a flight from San Francisco to Seattle/Tacoma Intl will take if you book a nonstop flight.

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.

$69+ Flights from San Francisco to Seattle

Home Search by date Vacation packages Hotels Flight deals Car rental Travel tips & news

Find cheap flights from San Francisco to Seattle with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheapflights Tip: The best prices from San Francisco to Seattle/Tacoma Intl are usually found in October or January, booked 75 days in advance, depart on a Friday or Thursday and return on a Friday

Cheap flight deals from San Francisco to Seattle

Round-trip from	$139 (Kiwi.com)
One-way from	$69 (United Airlines)
Popular in	June
Cheapest in	October
Average price	$281
Good round-trip deal	$246 or less
Good one-way deal	$162 or less

From San Francisco to Seattle/Tacoma Intl

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One-way flight from San Francisco to Seattle/Tacoma Intl

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Highest demand for flights based on searches. 9% potential increase in price ($23 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 1% potential price decrease ($5 potential savings vs. average RT price).

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Average for round-trip flights in July 2025

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Price to beat on a round-trip flight from San Francisco to Seattle/Tacoma Intl.

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Price to beat on a one-way 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 July 3, 2025.

Sun 8/246:00 amSFO - SEA

Nonstop2h 07mAlaska Airlines

Wed 8/275:05 pmSEA - SFO

Nonstop2h 14mAlaska Airlines

Deal found 7/1

$139

Sat 8/238:00 amSFO - SEA

Nonstop2h 16mHawaiian Airlines

Mon 8/255:05 pmSEA - SFO

Nonstop2h 14mHawaiian Airlines

Deal found 7/1

$141

Mon 8/2511:16 amSFO - SEA

1 stop6h 10mFrontier

Fri 8/293:25 pmSEA - SFO

1 stop5h 56mFrontier

Deal found 7/1

$145

Sat 8/234:35 pmSFO - SEA

Nonstop2h 11mDelta

Sun 8/247:28 amSEA - SFO

Nonstop2h 23mDelta

Deal found 7/3

$147

Sat 8/162:35 pmSFO - SEA

1 stop6h 55mSouthwest

Tue 8/196:45 amSEA - SFO

2 stops9h 10mSouthwest

Deal found 7/3

$162

Best flights from San Francisco to Seattle
Discover carefully curated flight deals from San Francisco to Seattle that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated July 3, 2025.

Sun 8/246:00 amSFO - SEA

Nonstop2h 07mAlaska Airlines

Wed 8/275:05 pmSEA - SFO

Nonstop2h 14mAlaska Airlines

Deal found 7/1

$139

Sat 8/238:00 amSFO - SEA

Nonstop2h 16mHawaiian Airlines

Mon 8/255:05 pmSEA - SFO

Nonstop2h 14mHawaiian Airlines

Deal found 7/1

$141

Mon 8/2511:16 amSFO - SEA

1 stop6h 10mFrontier

Fri 8/293:25 pmSEA - SFO

1 stop5h 56mFrontier

Deal found 7/1

$145

Sat 8/234:35 pmSFO - SEA

Nonstop2h 11mDelta

Sun 8/247:28 amSEA - SFO

Nonstop2h 23mDelta

Deal found 7/3

$147

Sat 8/162:35 pmSFO - SEA

1 stop6h 55mSouthwest

Tue 8/196:45 amSEA - SFO

2 stops9h 10mSouthwest

Deal found 7/3

$162

Last-minute flights from San Francisco to Seattle
Discover last-minute flight deals from San Francisco to Seattle. Data last updated July 3, 2025 and is based on user searches.

Fri 7/115:45 amSFO - SEA

1 stop8h 21mFrontier

Wed 7/2312:18 pmSEA - SFO

1 stop21h 17mFrontier

Deal found 6/30

$235

Fri 7/115:45 amSFO - SEA

1 stop8h 21mMultiple Airlines

Wed 7/235:59 pmSEA - SFO

Nonstop2h 16mMultiple Airlines

Deal found 6/30

$251

Sat 7/128:55 pmSFO - SEA

Nonstop2h 20mDelta

Wed 7/2310:05 pmSEA - SFO

Nonstop2h 14mDelta

Deal found 7/1

$262

Sat 7/124:20 pmSFO - SEA

2 stops7h 10mSouthwest

Wed 7/236:35 amSEA - SFO

2 stops8h 00mSouthwest

Deal found 7/1

$292

Sun 7/137:00 amSFO - SEA

Nonstop2h 05mAlaska Airlines

Fri 7/188:26 pmSEA - SFO

Nonstop2h 14mAlaska Airlines

Deal found 7/3

$322

Sat 8/162:35 pmSFO - SEA

1 stop6h 55mSouthwest

Tue 8/196:45 amSEA - SFO

2 stops9h 10mSouthwest

Deal found 7/3

$162

Sat 8/238:00 amSFO - SEA

Nonstop2h 16mHawaiian Airlines

Mon 8/255:05 pmSEA - SFO

Nonstop2h 14mHawaiian Airlines

Deal found 7/1

$141

Sat 8/234:35 pmSFO - SEA

Nonstop2h 11mDelta

Sun 8/247:28 amSEA - SFO

Nonstop2h 23mDelta

Deal found 7/3

$147

Sun 8/246:00 amSFO - SEA

Nonstop2h 07mAlaska Airlines

Wed 8/275:05 pmSEA - SFO

Nonstop2h 14mAlaska Airlines

Deal found 7/1

$139

Mon 8/2511:16 amSFO - SEA

1 stop6h 10mFrontier

Fri 8/293:25 pmSEA - SFO

1 stop5h 56mFrontier

Deal found 7/1

$145

One-way flights from San Francisco to Seattle
Search for one-way flight options from San Francisco to Seattle. Find affordable one-way fares based on user searches. Data last updated July 3, 2025.

Sat 8/1610:55 pmSFO - SEA

Nonstop2h 04mUnited Airlines

Deal found 7/2

$69

Sun 8/177:00 amSFO - SEA

Nonstop2h 05mAlaska Airlines

Deal found 7/3

$74

Sat 9/610:49 amSFO - SEA

1 stop9h 54mFrontier

Deal found 7/3

$75

Mon 9/156:00 amSFO - SEA

Nonstop2h 07mHawaiian Airlines

Deal found 7/2

$77

Wed 8/207:00 amSFO - SEA

2 stops7h 10mSouthwest

Deal found 7/1

$84

Wed 7/235:55 amSFO - SEA

Nonstop2h 10mDelta

Deal found 7/3

$109

Cheapflights Fare Finder

Use the filters below to find and compare flights from San Francisco to Seattle that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

San FranciscoSeattle

SFO - SEA

SFOSEA

San Francisco

Sun 8/24

6:00 am-8:07 am

Nonstop2h 07m

Seattle/Tacoma Intl

Wed 8/27

5:05 pm-7:19 pm

Nonstop2h 14m

$139

San FranciscoSeattle

SFO - SEA

SFOSEA

San Francisco

Sat 8/23

8:00 am-10:16 am

Nonstop2h 16m

Seattle/Tacoma Intl

Mon 8/25

5:05 pm-7:19 pm

Nonstop2h 14m

$141

San FranciscoSeattle

SFO - SEA

SFOSEA

San Francisco

Mon 8/25

11:16 am-5:26 pm

1 stop6h 10m

Seattle/Tacoma Intl

Fri 8/29

3:25 pm-9:21 pm

1 stop5h 56m

$145

San FranciscoSeattle

SFO - SEA

SFOSEA

San Francisco

Sat 8/23

4:35 pm-6:46 pm

Nonstop2h 11m

Seattle/Tacoma Intl

Sun 8/24

7:28 am-9:51 am

Nonstop2h 23m

$147

San FranciscoSeattle

SFO - SEA

SFOSEA

San Francisco

Sat 8/16

2:35 pm-9:30 pm

1 stop6h 55m

Seattle/Tacoma Intl

Tue 8/19

6:45 am-3:55 pm

2 stops9h 10m

$162

San FranciscoSeattle

SFO - SEA

SFOSEA

San Francisco

Sat 8/16

10:55 pm-12:59 am

Nonstop2h 04m

$69

San FranciscoSeattle

SFO - SEA

SFOSEA

San Francisco

Sun 8/17

7:00 am-9:05 am

Nonstop2h 05m

$74

San FranciscoSeattle

SFO - SEA

SFOSEA

San Francisco

Sat 9/6

10:49 am-8:43 pm

1 stop9h 54m

$75

San FranciscoSeattle

SFO - SEA

SFOSEA

San Francisco

Mon 9/15

6:00 am-8:07 am

Nonstop2h 07m

$77

San FranciscoSeattle

SFO - SEA

SFOSEA

San Francisco

Wed 8/20

7:00 am-2:10 pm

2 stops7h 10m

$84

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/2

Showing 1-10 of 11 results

The best insider tips for San Francisco to Seattle flights

Cheapflights partnered with top experts to bring you the best recommendations for your San Francisco to Seattle trip

Airports

SFO

Save time by ordering meals for pickup from restaurants participating in the SFO2Go program during busy times.

SEA

Use the Link light rail for an inexpensive, convenient trip from SEA to downtown Seattle in under 40 minutes.

Our travel experts

Harriet Baskas

Expert on SFO

Brandon Schultz

Expert on SEA

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?

The best time to book flights from San Francisco to Seattle is 64 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

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 $238). Flying from San Francisco to Seattle in July is currently the most expensive (average of $390). 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?

A simple way to save on the total cost of your ticket is to fly from San Francisco to Seattle in the afternoon. If you’re flexible enough to do this you can expect to save up to 24% on your trip compared to booking a flight at noon.

What is the cheapest day to fly from San Francisco to Seattle?

Travelers seeking maximum savings on their San Francisco to Seattle flight should consider departing on Friday afternoons when fares are most often at their lowest. Saturday evenings flights should be avoided if possible as fares are typically the most expensive at this time.

Weekly flight availability from San Francisco to Seattle

The most flights from SFO to SEA are scheduled on a Wednesday (113 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (30 on average).

Reviews of airlines servicing Seattle

Read through reviews of airlines operating flights from San Francisco to Seattle, such as Alaska Airlines, Southwest, and Delta. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

Alaska Airlines

8.0

Very good

10,000 reviews

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

10,000 reviews

Alaska Airlines

8.0

Very good

10,000 reviews

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

4,266 reviews

Alaska Airlines

8.0

Very good

10,000 reviews

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

7,982 reviews

Alaska Airlines

8.0

Very good

10,000 reviews

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

7.8

Good

2,545 reviews

Alaska Airlines

8.0

Very good

10,000 reviews

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

8,861 reviews

Alaska Airlines

8.0

Very good

10,000 reviews

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

What airports do I use to fly from San Francisco to Seattle?
Seattle/Tacoma Intl is the airport most travelers will use when flying to Seattle from San Francisco. Booking flights from San Francisco (SFO) to Seattle/Tacoma Intl (SEA) should be relatively easy as there are 71 daily flights to Seattle from 7 different airlines. 1h 56m is how long a flight from San Francisco to Seattle/Tacoma Intl will take if you book a nonstop flight.
How popular is this San Francisco to Seattle flight route?
Within the past month, 131 users have taken a look at flights from San Francisco to Seattle/Tacoma Intl.
What are the cheapest airlines flying from San Francisco to Seattle round-trip?
Our cheapest airline available from San Francisco to Seattle is Alaska Airlines. Our recent data shows that you can find tickets from as low as $139 on this airline. Additional options worth looking into are Hawaiian Airlines and Frontier, starting at $141 and $145 round-trip. Alaska Airlines is currently priced 42% below the average price you’ll pay for this route.
What are the cheapest airlines to fly from San Francisco to Seattle one-way?
To fly one-way, consider booking your trip with United Airlines, which is currently one of the cheapest options available, starting at $69. Alaska Airlines flights start at $74 while deals on Frontier start at $75 one-way.
What are the most reliable airlines from San Francisco to Seattle?
Before booking your flight to Seattle from San Francisco, check out the most reliable airlines to get you to your destination on time: Copa Airlines (100%), Aeromexico (97%), WestJet( 90%).
What are the cheapest flights from San Francisco to Seattle?
While on average a flight from San Francisco to Seattle is generally $1,222, our data shows the cheapest flight currently is $99. When looking at the most popular route, (San Francisco - Seattle/Tacoma Intl), you can expect to pay $131 for that flight.
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 $238). Flying from San Francisco to Seattle in July is currently the most expensive (average of $390). 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

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Shoreline

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Kent

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Complete your trip

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Other flights to Seattle

Top 7 airlines flying from San Francisco to Seattle

Airline	Cheapest	Average	Flexibility	On-time
Spirit Airlines	Cheapest$64	Average$128	FlexibilityNo cancel fee	On-time65%
Frontier	Cheapest$101	Average$218	FlexibilityNo cancel fee	On-time62%
Delta	Cheapest$115	Average$199	FlexibilityNo cancel fee	On-timeN/A
United Airlines	Cheapest$127	Average$254	FlexibilityNo cancel fee	On-time69%
Alaska Airlines	Cheapest$134	Average$251	FlexibilityNo cancel fee	On-time75%
Hawaiian Airlines	Cheapest$135	Average$256	FlexibilityNo cancel fee	On-time85%
American Airlines	Cheapest$226	Average$385	FlexibilityNo cancel fee	On-time71%

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$69+ Cheap flights from San Francisco to Seattle (SFO - SEA)

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 8/16. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from San Francisco to Seattle with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Cheapflights Tip: The best prices from San Francisco to Seattle/Tacoma Intl are usually found in October or January, booked 75 days in advance, depart on a Friday or Thursday and return on a Friday

Cheap flight deals from San Francisco to Seattle

Round-trip from

One-way from

Popular in

Cheapest in

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Good round-trip deal

Good one-way deal

Find flight deals from San Francisco to Seattle

Cheapest flights from San Francisco to SeattleExplore 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 July 3, 2025.

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 July 3, 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from San Francisco to Seattle that are best for you.

The best insider tips for San Francisco to Seattle flights

Cheapflights partnered with top experts to bring you the best recommendations for your San Francisco to Seattle trip

Airports

SFO

SEA

Our travel experts

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.

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 June 27, 2025.

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

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 July 3, 2025.

What is the cheapest day to fly from San Francisco to Seattle?

Use this chart to determine the cheapest time to fly round-trip from San Francisco to Seattle. Price data was last updated on June 29, 2025.

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 July 3, 2025.

Reviews of airlines servicing Seattle

Read through reviews of airlines operating flights from San Francisco to Seattle, such as Alaska Airlines, Southwest, and Delta. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

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?

How popular is this San Francisco to Seattle flight route?

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

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

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

What are the cheapest flights from San Francisco to Seattle?

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

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

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

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

Traveling to a place near San Francisco?

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Top 7 airlines flying from San Francisco to Seattle

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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 July 3, 2025.