SFO - DEN

Find cheap flights from San Francisco to Denver

1 adult
1 adult, Economy

KAYAK searches hundreds of travel sites at once for deals on flights to Denver

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from San Francisco to Denver, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from San Francisco to Denver, as well as popular online travel agencies
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Expert advice
Booking Insights
Flights Deals

Cheap Flights from San Francisco to Denver (SFO-DEN)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from San Francisco to Denver that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from San Francisco to Denver

Air Canada Logo
SFO-DEN
2h 35mdirect
Air Canada Logo
DEN-SFO
2h 42mdirect
Air Canada
Find Deal
Frontier Logo
SFO-DEN
2h 44mdirect
Frontier Logo
DEN-SFO
2h 45mdirect
Frontier
Find Deal
Avianca Logo
SFO-DEN
2h 35mdirect
Avianca Logo
DEN-SFO
2h 52mdirect
Avianca
Find Deal
Emirates Logo
SFO-DEN
2h 35mdirect
Emirates Logo
DEN-SFO
2h 49mdirect
Emirates
Find Deal
Southwest Logo
SFO-DEN
2h 30mdirect
Southwest Logo
DEN-SFO
2h 40mdirect
Southwest
Find Deal
ANA Logo
SFO-DEN
2h 34mdirect
ANA Logo
DEN-SFO
2h 47mdirect
Asiana Airlines Logo
SFO-DEN
2h 38mdirect
Asiana Airlines Logo
DEN-SFO
2h 51mdirect
Asiana Airlines
Find Deal
Virgin Australia Logo
SFO-DEN
2h 36mdirect
Virgin Australia Logo
DEN-SFO
2h 42mdirect
Virgin Australia
Find Deal
SWISS Logo
SFO-DEN
2h 40mdirect
SWISS Logo
DEN-SFO
2h 46mdirect
Air New Zealand Logo
SFO-DEN
2h 36mdirect
Air New Zealand Logo
DEN-SFO
2h 42mdirect
Air New Zealand
Find Deal
United Airlines Logo
SFO-DEN
2h 36mdirect
United Airlines Logo
DEN-SFO
2h 42mdirect
United Airlines
Find Deal
Air China Logo
SFO-DEN
2h 34mdirect
Air China Logo
DEN-SFO
2h 42mdirect
Air China
Find Deal
Expert advice

Expert advice for your flight from San Francisco to Denver

 
Snippets provided in this section are AI-generated based on a summarisation of KAYAK-commissioned articles. The articles are presented as-is, for general informational purposes only, and may not be up-to-date. The opinions contained in the articles are original to the author and reflect their authentic experience, which may vary significantly from the experience of others.
KAYAK teamed up with top travel experts to share the best tips for your journey.
Airlines
Air Canada

Air Canada's Preferred Economy seats offer up to 10 extra cm of legroom for a fee.


Air Canada offers live TV on some North American flights, enhancing in-flight entertainment.

Read more about Air Canadaby Stefanie Waldek
United Airlines

United's Economy Plus offers up to 15 cm more legroom than standard economy seats.


Purchase Priority Boarding to secure overhead bin space and avoid gate-checking your carry-on.

Frontier

Frontier's Premium Bundle includes priority boarding and extra legroom seats for CA$27 more.


Frontier's Basic Fare only includes a personal item; carry-on bags cost extra.

Read more about Frontierby Stefanie Waldek
Our travel experts
Stefanie Waldek

Stefanie Waldek

Expert on Air Canada, United Airlines and Frontier

Stefanie Waldek

Stefanie Waldek

Stefanie Waldek is a freelance space, travel, and design writer based in Saratoga Springs, NY. Her words have appeared in Space.com, Travel + Leisure, Condé Nast Traveler, Architectural Digest, and House Beautiful, among other publications. An expert in aviation and expedition cruising, Stefanie is frequently up in the air or on the sea, likely en route to Antarctica or the Arctic.

Read more
Booking Insights

KAYAK's insights & trends for San Francisco to Denver flights

Get data-powered insights and trends into flights from San Francisco to Denver to help you find the cheapest flights, the best time to fly and much more.

What’s the cheapest day of the week to fly from San Francisco to Denver?

The average price of all round-trip flights from San Francisco to Denver clicked on KAYAK for each day over the last 12 months.

Your flight ticket price will generally be cheaper if you fly to Denver on a Thursday and more expensive on a Saturday. On your return trip to San Francisco, you should consider flying back on a Monday, and avoid Thursdays for better deals.

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from San Francisco to Denver, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from San Francisco to Denver is January, where tickets cost C$ 263 (return) on average. On the other hand, the most expensive months are June and December, where the average cost of round-trip tickets is C$ 380 and C$ 363 respectively.

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

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from San Francisco to Denver, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price on the flight from San Francisco to Denver, you should book around 2 weeks before departure, which saves you about 22% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 6 weeks before departure.


Good to know

Low seasonJanuary
Best time to beat the crowds (16% less expensive on average)
Most popular time to fly (14% more expensive on average)

When to book flights from San Francisco to Denver

Are your dates flexible? Find out the best times to travel from San Francisco to Denver based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from San Francisco to Denver

  • Which airlines offer Wi-Fi service onboard planes from San Francisco to Denver?

    Alaska Airlines, Delta, Hawaiian Airlines, American Airlines, and JetBlue offer inflight Wi-Fi service on the San Francisco to Denver flight route.

  • Which aircraft models fly most regularly from San Francisco to Denver?

    The Airbus A321neo is the aircraft model that flies most regularly on the San Francisco to Denver flight route.

  • Which airline alliances offer flights from San Francisco to Denver?

    Star Alliance is the only airline alliance operating flights between San Francisco and Denver.

  • On which days can I fly direct from San Francisco to Denver?

    There are direct flights from San Francisco to Denver on a daily basis.

  • How does KAYAK find such low prices on flights from San Francisco to Denver?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from San Francisco to Denver.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from San Francisco to Denver?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Denver from San Francisco is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from San Francisco to Denver?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Denver with an airline and back to San Francisco with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from San Francisco to Denver?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Denver from San Francisco up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

KAYAK’s top tips for finding a cheap flight from San Francisco to Denver

  • Looking for a cheap flight? 25% of our users found flights on this route for C$ 201 or less one-way and C$ 453 or less round-trip.

Prefer to fly direct from San Francisco to Denver?

 
Direct data is based off flight results for the next 60 days. Find direct flights from all airlines flying direct from San Francisco to Denver Intl.
Find which airlines fly direct from San Francisco Airport to Denver Intl Airport, which days they fly and book direct flights.

Direct departures

San Francisco to Denver Intl

Monday

ANA,Air Canada,Air New Zealand, +8 more

ANA,Air Canada, +9 more

Tuesday

ANA,Air Canada,Air New Zealand, +7 more

ANA,Air Canada, +8 more

Wednesday

ANA,Air Canada,Air China, +9 more

ANA,Air Canada, +10 more

Thursday

ANA,Air Canada,Air New Zealand, +7 more

ANA,Air Canada, +8 more

Friday

ANA,Air Canada,Air New Zealand, +8 more

ANA,Air Canada, +9 more

Saturday

ANA,Air Canada,Air China, +8 more

ANA,Air Canada, +9 more

Sunday

ANA,Air Canada,Air New Zealand, +7 more

ANA,Air Canada, +8 more

See more nonstop flights

Direct returns

Denver Intl to San Francisco

Monday

ANA,Air Canada,Air New Zealand, +8 more

ANA,Air Canada, +9 more

Tuesday

ANA,Air Canada,Air New Zealand, +7 more

ANA,Air Canada, +8 more

Wednesday

ANA,Air Canada,Air China, +9 more

ANA,Air Canada, +10 more

Thursday

ANA,Air Canada,Air New Zealand, +7 more

ANA,Air Canada, +8 more

Friday

ANA,Air Canada,Air New Zealand, +8 more

ANA,Air Canada, +9 more

Saturday

ANA,Air Canada,Air China, +8 more

ANA,Air Canada, +9 more

Sunday

ANA,Air Canada,Air New Zealand, +7 more

ANA,Air Canada, +8 more

See more nonstop flights

Reviews of the top airline flying from San Francisco to Denver

 
See real verified KAYAK customer reviews for airlines flying from San Francisco to Denver. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from San Francisco to Denver? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
5.9
FrontierOverall score based on 3237 reviews
6.1Boarding
6.7Crew
4.7Food
5.6Comfort
4.5Entertainment
Airline reviews

Frontier Airlines was AWFUL. I was an hour early for my flight and the lady refused to check me in. I had to purchase a whole new ticket with a different airline.

2.0 MediocreAnonymous, Jul 2025DCA - DEN
Read more Frontier reviews

Frontier Airlines was AWFUL. I was an hour early for my flight and the lady refused to check me in. I had to purchase a whole new ticket with a different airline.

Late, terrible communication, horrible planning of passenger seating until the literal last minute. One of the worst flying experiences of my life. Y'all suck

First of all, we never got on the connecting flight to Denver. They delayed our flight for two hours. If we would have gotten on that flight, we would have been stuck in Denver for 13 hours. So we re- routed our flight for a straight through flight to Oklahoma two days later. THEN, they delayed that flight for two hours. After that we were able to finally get on our flight and come home. Frontier Airlines - one of the worst airlines I have ever been on.

Terrible communication with weather delay, lost baggage, near impossible to reach customer service

My tickets got canceled on me by your site and I didn't have a flight. Then you kept sending me emails on the status of q flight I didn't have tickets for.

Flight was late. Missed connecting in Denver. My new flight is more than 24 hours later and I have no room, vouchers, or compensation, and might also be bumped from the one tomorrow.

This was one of the first frontier airline flights this spring that wasn't delayed. It actually left on time. Some of the flight crew did not look happy, they didn't smile when the passengers were boarding or getting off the plane, and the passengers initiated greetings, not the staff. To me this was an odd experience to have with any flight/airline. I had a bad experience booking this flight. The price didn't solidify until late hours into the night. Ever time I purchased the ticket, I either received a denial email or an error because the price has changed, but it was never reflected on the flyfrontier or kayak websites until way after midnight on the date of travel. This caused me anxiety and irritation with the websites. Then I noticed a mishap with my name on my voucher as I went to check in, it was incorrect. When I proceeded to correct it, Frontier had no easy, let alone free, way to remedy it. I couldn't correct my name without a $75 charge, I couldn't cancel my voucher to repurchase it with the correct name without a $100 charge, because it was too close to departure. Then calling frontier was nearly impossible to remedy the situation with a human. It's already difficult to want to choose frontier because of all the upcharges, but you feel kinda trapped into doing so because it's the more affordable airline.

Our flight was cancelled. They could do nothing to help us get another flight that was timely. Because the first leg was cancelled we were unable to get to our connection. We had to book on an entirely different airline for today. So we spent more money, lost a day of vacation and will never fly Frontier again, so the 'we are sorry, here is $100 credit' is a joke since we won't be flying on Frontier.

I liked the turn-style feature at gate 209B at LAX. Very efficient process. The gate staff also made several, clearly directed announcements so I felt very informed.

Seats are uncomfortable but price is good. Guess I can put up with misery for four hours.

Everything you need to know for your flight from San Francisco to Denver

Information on your arrival and departure airports

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