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

View $69 flight on Tue, Oct 28, 2025Opens in a new window

  • Plan, book, fly with confidence

  • trending down icon

    Be in the know

    Get alerts if flight prices drop or rise*
  • bex rewards loyalty icon

    Book smarter

    Save up to 30% on select hotels after you book a flight*
  • one key icon

    Earn twice

    Earn your airline miles on top of our OneKeyCash
    Learn about One Key

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

Prices were available within the past 7 days and start at $69 for one-way flights and $137 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Tue, Oct 28 - Wed, Oct 29
SEA
Seattle
SFO
San Francisco
$137 Roundtrip, found 2 hours ago
$137
Roundtrip
found 2 hours ago
Select United flight, departing Tue, Oct 28 from Seattle to San Francisco, returning Wed, Oct 29, priced at $137 found 2 hours ago
United
Tue, Oct 21 - Wed, Oct 22
SEA
Seattle
SFO
San Francisco
$141 Roundtrip, found 2 hours ago
$141
Roundtrip
found 2 hours ago
Select United flight, departing Tue, Oct 21 from Seattle to San Francisco, returning Wed, Oct 22, priced at $141 found 2 hours ago
United
Tue, Oct 21 - Wed, Oct 22
SEA
Seattle
SFO
San Francisco
$143 Roundtrip, found 2 hours ago
$143
Roundtrip
found 2 hours ago
Select United flight, departing Tue, Oct 21 from Seattle to San Francisco, returning Wed, Oct 22, priced at $143 found 2 hours ago
United
Wed, Oct 29 - Tue, Nov 4
SEA
Seattle
SFO
San Francisco
$144 Roundtrip, found 3 hours ago
$144
Roundtrip
found 3 hours ago
Select United flight, departing Wed, Oct 29 from Seattle to San Francisco, returning Tue, Nov 4, priced at $144 found 3 hours ago
United
Wed, Sep 17 - Sat, Sep 27
SEA
Seattle
SFO
San Francisco
$145 Roundtrip, found 7 hours ago
$145
Roundtrip
found 7 hours ago
Select United flight, departing Wed, Sep 17 from Seattle to San Francisco, returning Sat, Sep 27, priced at $145 found 7 hours ago
United
Sat, Oct 4 - Tue, Oct 14
SEA
Seattle
SFO
San Francisco
$146 Roundtrip, found 7 hours ago
$146
Roundtrip
found 7 hours ago
Select United flight, departing Sat, Oct 4 from Seattle to San Francisco, returning Tue, Oct 14, priced at $146 found 7 hours ago
Flights from Seattle (SEA) to San Francisco (SFO)
Origin airport
Seattle - Tacoma Intl.
Destination airport
San Francisco 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 Seattle - Tacoma Intl. Airport (SEA) to San Francisco Intl. Airport (SFO)?
Finding cheap one-way United Airlines flights from SEA to SFO from $69 on Expedia is simple — just filter by "Price (lowest to highest)." Or check out our budget-friendly return fares from $137 for your next exciting adventure.**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 SEA to SFO with United Airlines?
Look for one-way or round-trip flights to San Francisco in February or April. You could find cheaper fares with United Airlines during these off-peak travel months.
What is the cheapest time to book flights from Seattle - Tacoma Intl. Airport (SEA) to San Francisco Intl. Airport (SFO) with United Airlines?
Search for cheap United Airlines flights from Seattle - Tacoma Intl. Airport (SEA) to San Francisco Intl. Airport (SFO) one to three months before your departure. 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 itinerary, the best day to book a domestic flight is usually Sunday and the most expensive is typically Monday. Passengers who book on a Sunday can save 6% on average compared to those who book 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 Seattle - Tacoma Intl. Airport (SEA) to San Francisco Intl. Airport (SFO)?
Skip the layovers and fly from Seattle - Tacoma Intl. Airport (SEA) to San Francisco Intl. Airport (SFO) on any of United Airlines's 35 direct weekly flights. Use our "Nonstop" and "Airline" filters to find the United Airlines flight that'll get you to SFO at a time that suits you.
How long does it take to fly from SEA to SFO with United Airlines?
On average, it takes 2h 19m to travel nonstop from Seattle - Tacoma Intl. Airport (SEA) to San Francisco Intl. Airport (SFO) with United Airlines.
Which day of the week has the most United Airlines flights from Seattle - Tacoma Intl. Airport (SEA) to San Francisco Intl. Airport (SFO)?
Tuesday has the most United Airlines flights from Seattle - Tacoma Intl. Airport (SEA) to San Francisco Intl. Airport (SFO). With 6 daily departures, this is the best day to find something that will fit your plans.
What is the earliest United Airlines flight from SEA to SFO?
Departing SEA at 5:45AM UTC-8, the first United Airlines flight to SFO arrives at 8:05AM UTC-8. Traveling earlier in the day means you'll be less likely to experience cancellations.* Prefer to travel later? The last United Airlines flight from SEA to SFO departs at 5:15PM UTC-8 and touches down at 7:34PM 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 San Francisco?
When taking off from Seattle - Tacoma Intl. Airport (SEA) to San Francisco with United Airlines, you'll probably touch down at San Francisco Intl. Airport (SFO). This is the airline's main hub in this destination. Other nearby airports such as Norman Y. Mineta San Jose Intl. Airport (SJC) and Oakland Intl. Airport (OAK) may offer cheaper tickets, so it's a good idea to consider all options on Expedia.
Why fly with United Airlines from SEA to SFO?
A rewarding loyalty program and the opportunity to collect points through United Mileage Plus are the start of the reasons to leave from SEA to SFO with United Airlines. Plus, by joining Expedia's free One Key™ program, you can receive OneKeyCash™* alongside United Airlines's loyalty program earnings. It's yours to spend on your next adventure.*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 Seattle - Tacoma Intl. Airport (SEA) to San Francisco Intl. Airport (SFO)?
You'll likely board a Boeing 737-800 or an Airbus A320 when flying United Airlines from Seattle - Tacoma Intl. Airport (SEA) to San Francisco Intl. Airport (SFO). However, keep in mind that a different plane may be assigned due to operational requirements.
Can I change or cancel my United Airlines flight from Seattle - Tacoma Intl. Airport (SEA) to San Francisco Intl. Airport (SFO)?
Changes are typically free within 24 hours of making your booking, but your airline may charge a fee after that. For further information about altering your flights, go to your "Trips," select your flight and click on "Manage Booking." If you want the freedom to change your plans without being charged, apply the "Changes included" or "No cancel fee" filter when organizing your trip.

Explore a world of travel with Expedia

*Available to One Key members.