$79 Cheap United flights San Francisco (SFO) to Denver (DEN)

View $79 flight on Wed, Oct 1, 2025Opens in a new window

$79 Cheap United flights San Francisco (SFO) to Denver (DEN)

Prices were available within the past 7 days and start at $79 for one-way flights and for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Flights from San Francisco (SFO) to Denver (DEN)
Origin airport
San Francisco Intl.
Destination airport
Denver Intl.
Airlines serving
Alaska Airlines, American Airlines, Delta, Frontier Airlines, Southwest Airlines, United
Popular airline
Alaska Airlines
Distance
965 mi
Average flight time
3 hours 30 mins

Frequently asked questions

How much is a United Airlines flight from San Francisco Intl. Airport (SFO) to Denver Intl. Airport (DEN)?
You'll discover affordable return United Airlines flights from SFO to DEN by organizing your results from "Price (lowest to highest)" on Expedia. Or search for options from $79 for a one-way journey.**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 DEN with United Airlines?
January is one of the cheapest months to get away to Denver with United Airlines. You could also find great prices on one-way and round-trip fares in November.
What is the cheapest time to book flights from San Francisco Intl. Airport (SFO) to Denver Intl. Airport (DEN) with United Airlines?
Start searching one to three months ahead of your departure date to get cheap fares on United Airlines flights from San Francisco Intl. Airport (SFO) to Denver Intl. Airport (DEN). You can save 25% by booking your domestic flight 34 to 86 days in advance compared to last-minute reservations made 6 to 12 days out. You could also cut costs by buying your fare on a Sunday, as it's 6% cheaper on average than a Monday, the most expensive day to book.* Nail your timing, and you can enjoy significant savings on domestic trips.*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 Denver Intl. Airport (DEN)?
Skip the layovers and fly from San Francisco Intl. Airport (SFO) to Denver Intl. Airport (DEN) on one of United Airlines's 68 weekly direct flights. Use our "Nonstop" and "Airline" filters to find the United Airlines flight that'll take you to DEN at your preferred time.
How long does it take to fly from SFO to DEN with United Airlines?
Leave San Francisco Intl. Airport (SFO) for Denver Intl. Airport (DEN) on a direct United Airlines flight, and you'll be in the air for around 2h 41m.
Which day of the week has the most United Airlines flights from San Francisco Intl. Airport (SFO) to Denver Intl. Airport (DEN)?
Saturday has the most United Airlines flights from San Francisco Intl. Airport (SFO) to Denver Intl. Airport (DEN). With 10 daily departures, this is a great day to find something that will fit your plans.
What is the earliest United Airlines flight from SFO to DEN?
The first flight from SFO to DEN with United Airlines leaves at 5:14AM UTC-8. You'll land at 8:56AM UTC-7. The final United Airlines flight of the day leaves at 8:19PM UTC-8 and arrives at 11:59PM UTC-7. With 20% fewer cancellations for morning departures, starting your travel day early is typically the smartest choice.**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 Denver?
Denver Intl. Airport (DEN) is the primary Denver hub for United Airlines flights from San Francisco Intl. Airport (SFO).
Why fly with United Airlines from SFO to DEN?
A rewarding loyalty program and the ability to rack up points through United Mileage Plus are the start of the reasons to leave from SFO to DEN with United Airlines. Plus, when you join Expedia's free One Key™ program, you can earn OneKeyCash™* in addition to United Airlines's loyalty program earnings. It's yours to use wherever your next trip takes you.*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 Denver Intl. Airport (DEN)?
You'll likely be on a Boeing 737-900 or a Boeing 737-800 when flying United Airlines from San Francisco Intl. Airport (SFO) to Denver Intl. Airport (DEN). However, keep in mind that a different aircraft may be used depending on operational demands.
Can I change or cancel my United Airlines flight from San Francisco Intl. Airport (SFO) to Denver Intl. Airport (DEN)?
Changes are often free within 24 hours of making a booking, but your airline may add a charge after that. For more details about modifying your flights, head to your "Trips," select your flight and click on "Manage Booking." If you want the freedom to update your itinerary without additional costs, apply the "Changes included" and "No cancel fee" filters when organizing your trip.

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*Available to One Key members.