$69 Cheap United flights San Francisco (SFO) to Seattle (SEA)

View $69 flight on Wed, Oct 1, 2025Opens in a new window

$69 Cheap United flights San Francisco (SFO) to Seattle (SEA)

Prices were available within the past 7 days and start at $69 for one-way flights and $139 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Sat, Oct 18 - Tue, Oct 21
SFO
San Francisco
SEA
Seattle
$139 Roundtrip, just found
$139
Roundtrip
just found
Select United flight, departing Sat, Oct 18 from San Francisco to Seattle, returning Tue, Oct 21, priced at $139 just found
United
Wed, Nov 5 - Sat, Nov 8
SFO
San Francisco
SEA
Seattle
$143 Roundtrip, just found
$143
Roundtrip
just found
Select United flight, departing Wed, Nov 5 from San Francisco to Seattle, returning Sat, Nov 8, priced at $143 just found
United
Sun, Sep 21 - Wed, Sep 24
SFO
San Francisco
SEA
Seattle
$148 Roundtrip, just found
$148
Roundtrip
just found
Select United flight, departing Sun, Sep 21 from San Francisco to Seattle, returning Wed, Sep 24, priced at $148 just found
United
Sun, Nov 16 - Tue, Nov 25
SFO
San Francisco
SEA
Seattle
$168 Roundtrip, found 1 hour ago
$168
Roundtrip
found 1 hour ago
Select United flight, departing Sun, Nov 16 from San Francisco to Seattle, returning Tue, Nov 25, priced at $168 found 1 hour ago
United
Sun, Oct 5 - Tue, Oct 7
SFO
San Francisco
SEA
Seattle
$169 Roundtrip, just found
$169
Roundtrip
just found
Select United flight, departing Sun, Oct 5 from San Francisco to Seattle, returning Tue, Oct 7, priced at $169 just found
United
Sat, Oct 18 - Mon, Oct 27
SFO
San Francisco
SEA
Seattle
$170 Roundtrip, found 1 hour ago
$170
Roundtrip
found 1 hour ago
Select United flight, departing Sat, Oct 18 from San Francisco to Seattle, returning Mon, Oct 27, priced at $170 found 1 hour ago
Flights from San Francisco (SFO) to Seattle (SEA)
Origin airport
San Francisco Intl.
Destination airport
Seattle - Tacoma Intl.
Airlines serving
Alaska Airlines, American Airlines, Delta, Frontier Airlines, Southwest Airlines, United
Popular airline
Alaska Airlines
Distance
679 mi
Average flight time
2 hours 12 mins

Frequently asked questions

How much is a United Airlines flight from San Francisco Intl. Airport (SFO) to Seattle - Tacoma Intl. Airport (SEA)?
You'll find affordable return United Airlines flights from $139 from SFO to SEA by filtering your results from "Price (lowest to highest)" on Expedia. Or search for deals from $69 for a one-way trip.**These prices were available on Expedia within the past 7 days, for flights departing within the next year. Prices and availability are subject to change. Additional terms apply.
What is the cheapest month to fly from SFO to SEA with United Airlines?
United Airlines flights to Seattle are typically more affordable in the low-season months of January and February. Whether you need a one-way or round-trip ticket, you could land a better deal then.
What is the cheapest time to book flights from San Francisco Intl. Airport (SFO) to Seattle - Tacoma Intl. Airport (SEA) with United Airlines?
Search for cheap United Airlines flights from San Francisco Intl. Airport (SFO) to Seattle - Tacoma Intl. Airport (SEA) one to three months before your departure day. Travelers who book domestic flights 34 to 86 days in advance can save 25% compared to those who book just 6 to 12 days ahead. Regardless of fare type and journey, the best day of the week to book a domestic flight is usually Sunday and the most expensive day tends to be Monday. Passengers who book on a Sunday can save 6% on average compared to those who book their travel on a Monday.**Ideal booking window recommendation is based on average round-trip ticket prices for January through November for 2024. Best day of the week to book recommendation is based on average round-trip ticket prices for January through October 2024. All data sourced from ARC's global airline sales database.
Does United Airlines fly nonstop from San Francisco Intl. Airport (SFO) to Seattle - Tacoma Intl. Airport (SEA)?
Yes, you can travel from San Francisco Intl. Airport (SFO) to Seattle - Tacoma Intl. Airport (SEA) on any of United Airlines's 35 direct weekly flights. Make use of our "Nonstop" and "Airline" filters to find the United Airlines flight that'll arrive at SEA at your preferred time.
How long does it take to fly from SFO to SEA with United Airlines?
Leave San Francisco Intl. Airport (SFO) for Seattle - Tacoma Intl. Airport (SEA) on a nonstop United Airlines flight, and you'll be in the air for approximately 2h 20m.
Which day of the week has the most United Airlines flights from San Francisco Intl. Airport (SFO) to Seattle - Tacoma Intl. Airport (SEA)?
Monday has the most United Airlines flights from San Francisco Intl. Airport (SFO) to Seattle - Tacoma Intl. Airport (SEA). With 6 daily departures, this is the best day to book something that will fit your plans.
What is the earliest United Airlines flight from SFO to SEA?
Departing SFO at 9:00AM UTC-8, the earliest United Airlines flight to SEA arrives at 11:20AM UTC-8. Traveling early means you're less likely to experience delays.* Don't like early starts? The last United Airlines flight from SFO to SEA departs at 9:30PM UTC-8 and touches down at 11:50PM UTC-8.*Most reliable time of the day recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
What airports does United Airlines fly into in Seattle?
United Airlines flights from San Francisco Intl. Airport (SFO) to Seattle touch down at Seattle - Tacoma Intl. Airport (SEA) and Snohomish County - Paine Field Airport (PAE). The main Seattle gateway served by this carrier is SEA. It's worth comparing flights landing at nearby airports on Expedia as you may find cheaper fares.
Why fly with United Airlines from SFO to SEA?
A rewarding loyalty program and the ability to collect points through United Mileage Plus are the start of the reasons to jet off from SFO to SEA with United Airlines. Plus, when you sign up to our One Key™ program, you can receive OneKeyCash™* on top of any airline loyalty program earnings. It's yours to spend on future travel plans.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.
What type of plane does United Airlines fly from San Francisco Intl. Airport (SFO) to Seattle - Tacoma Intl. Airport (SEA)?
United Airlines usually flies Boeing 737-800 planes for flights from San Francisco Intl. Airport (SFO) to Seattle - Tacoma Intl. Airport (SEA). This carrier also operates the Airbus A320 on this route. Bear in mind that aircraft type can change depending on operational needs, so the plane you catch could be different on the day you travel.
Can I change or cancel my United Airlines flight from San Francisco Intl. Airport (SFO) to Seattle - Tacoma Intl. Airport (SEA)?
It's usually possible to cancel or modify your flight, although there may be a charge if you made your booking more than 24 hours ago. Prefer to keep your options open? Make use of Expedia's "No cancel fee" and "Changes included" filters to find flights that won't charge extra if you need to revise your plans. To make changes, head to "Trips," select your flight and click on "Manage Booking" for more information.

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*Available to One Key members.