SFO - DEN

£70 Find Cheap Flights from San Francisco to Denver

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from San Francisco to Denver departing on 10/8. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

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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41.299.237 searches in the past 7 days on KAYAK

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Everything you should know

Cheapest return fare
£130
Typical prices: £284-£152
Frontier
Sat 6/6Sat 13/6
SFO - DEN • 1 stop
Cheapest direct flights
£147
Typical prices: £278-£150
Frontier
Sat 6/6Sat 13/6
SFO - DEN • Direct
Top airlines
Cheapest • from £130 (return)
Best reviews • 5.6 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Direct flights
You can fly direct with Frontier, Southwest, and United Airlines. Average duration is 2h 43m
Direct flights
Direct flights
+1
+1
Direct flights
Direct flights
+1
Avoid delays
Most punctual • 87% on-time
Best time • Fewest delays
Insights
Insights
Insights
Insights
When to book
in advance
Our data shows that travellers who book at least 2 weeks in advance save around 23% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
Cheapest • 14% price drop
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Start a new search
KAYAK searches hundreds of sites at once to find you the best travel deals.
We hope you love your trip to Denver!
Flight Deals
Booking Insights
Flight 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 return 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 return flight deals from San Francisco to Denver

Sat, 6 Jun - Sat, 13 Jun
Frontier Logo
17:30 - 00:31
SFO
-
DEN
6h 01m
1 stop
Frontier Logo
22:29 - 00:27
DEN
-
SFO
2h 58mdirect
£130Frontier
Sat, 6 Jun - Sat, 13 Jun
Frontier Logo
17:30 - 00:31
SFO
-
DEN
6h 01m
1 stop
Frontier Logo
06:00 - 18:22
DEN
-
SFO
13h 22m
1 stop
£141Frontier
Sat, 6 Jun - Sat, 13 Jun
Frontier Logo
08:56 - 12:50
SFO
-
DEN
2h 54mdirect
Frontier Logo
22:29 - 00:27
DEN
-
SFO
2h 58mdirect
£147Frontier
Wed, 13 May - Fri, 15 May
Frontier Logo
21:26 - 10:01
SFO
-
DEN
11h 35m
1 stop
Frontier Logo
06:45 - 16:30
DEN
-
SFO
10h 45m
1 stop
£149Frontier
Wed, 13 May - Fri, 15 May
Frontier Logo
06:00 - 09:52
SFO
-
DEN
2h 52mdirect
Frontier Logo
06:45 - 16:30
DEN
-
SFO
10h 45m
1 stop
£152Frontier
Wed, 13 May - Fri, 15 May
Frontier Logo
06:00 - 09:52
SFO
-
DEN
2h 52mdirect
Frontier Logo
22:29 - 00:23
DEN
-
SFO
2h 54mdirect
£181Frontier
Wed, 2 Sep - Tue, 8 Sep
Delta Logo
08:55 - 22:58
SFO
-
DEN
13h 03m
1 stop
Delta Logo
06:30 - 17:50
DEN
-
SFO
12h 20m
1 stop
£195Delta
Sat, 16 May - Wed, 20 May
Alaska Airlines Logo
17:41 - 23:37
SFO
-
DEN
4h 56m
1 stop
Alaska Airlines Logo
14:19 - 21:31
DEN
-
SFO
8h 12m
1 stop
£198Alaska Airlines
Wed, 20 May - Wed, 20 May
Delta Logo
05:40 - 11:45
SFO
-
DEN
5h 05m
1 stop
Delta Logo
18:19 - 00:27
DEN
-
SFO
7h 08m
1 stop
£205Delta
Wed, 27 May - Sat, 30 May
Alaska Airlines Logo
06:16 - 13:39
SFO
-
DEN
6h 23m
1 stop
Alaska Airlines Logo
06:40 - 11:53
DEN
-
SFO
6h 13m
1 stop
£207Alaska Airlines
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.

How much is a return flight from San Francisco to Denver?

This analysis is based on the cheapest return trip price found on KAYAK in the last 12 months by searching for a flight from San Francisco to Denver departing in June.

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 October, where tickets cost £167 (return) on average. On the other hand, the most expensive months are March and December, where the average cost of round-trip tickets is £231 and £223 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 23% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 6 weeks before departure.

Good to know - Cheap tickets from San Francisco to Denver

Low seasonJanuary
Cheapest flight£70
Best time to beat the crowds (5% less expensive on average)
Most popular time to fly (7% more expensive on average)
Flight from San Francisco to Denver

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 return price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or returns 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

  • How do I get from Denver Airport to downtown Denver?

    The RTD bus service connects Denver Airport with the city and departs every 15m from the airport. The bus stop is located at the DEN Transit Center at the south end of Jeppesen Terminal. There is also an information counter in the arrivals hall if you have any questions about routes, fares, or directions. Day passes can be purchased for approximately $9 in cash (no change given) at the bus driver or with credit cards at the ticket machines.

  • Where can I eat at Denver airport after I’ve landed?

    If you land at Jeppesen Terminal and fancy authentic American cuisine, opt for the Boulder Beer Tap House at level 5 on the west side of the terminal. Here you can consume scrumptious snacks, warm dishes, and craft beer. For Mexican food, the Cantina Grill at level 6 is also a good option to get something hearty to eat.

  • Where can I find the car rental center at Denver airport?

    Explore the city and its surroundings conveniently with your own four wheels and rent a car directly from one of the companies located at the airport. The airport has its own car rental center which can be reached with a courtesy shuttle departing from Jeppesen Terminal at level 5, island 4. Companies operating at the airport include Avis, Thrifty, and Enterprise, which are at your service 24/7.

  • Is there a hotel at Denver airport?

    The Westin Denver International Airport Hotel is just a few steps from the terminal building and provides transit flyers, late arrivals, or early departing passengers with a nearby bed. Apart from its over 500 rooms, the hotel boasts a conference center, pool, and gym, as well as various restaurants.

  • What is the cheapest flight from San Francisco to Denver?

    In the last 3 days, the lowest price for a flight from San Francisco to Denver was £70 for a one-way ticket and £130 for a return.

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

    Alaska Airlines, Delta, JetBlue, and American Airlines 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 Boeing 737 MAX 8 is the aircraft model that flies most regularly on the San Francisco to Denver flight route.

  • 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 return 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 from Denver to San Francisco? 25% of our users found flights on this route for £202 or less one-way.
  • If you’d like to fly cheap and nonstop from San Francisco to the Denver International Airport (DEN), you can book with Frontier Airlines. This low-cost airline offers regular flights from San Francisco to Denver and allows you to save some money on your journey for your time away.
  • For anyone who has extra time on their hands before their departure from San Francisco International Airport (SFO) and who are interested in everything connected to airports and airplanes, a visit at the Aviation Museum & Library is right up the sleeve. You can find it in the main hall of the international terminal building and get access between 10:30 am and 4:30 pm.
  • Let your children use up their energy before boarding your flight from San Francisco to Denver and check out the Kids’ Spots at Terminal 3, Area F, and Area E. Tubes, toys, and interactive activities keep the little ones entertained until it is time to board.
  • Roaming through the San Francisco airport allows you to spot all the exhibited art from regional artists. The SFO Museum and Art Collection welcome and see off travelers in style with various art installations, pictures, and sculptures.
  • Pigs and dogs are usually not a common sight at airports, but at San Francisco airport they belong to the crew. The Wag Brigade consists of various specially trained dogs and a pig who give travelers a joyful (and sometimes wet) welcome and goodbye. They can be detected by their "Pet Me" vests and wagging tails while wandering through the terminals.

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

Frontier,Southwest,United Airlines

Frontier,Southwest, +1 more

Tuesday

Frontier,Southwest,United Airlines

Frontier,Southwest, +1 more

Wednesday

Frontier,Southwest,United Airlines

Frontier,Southwest, +1 more

Thursday

Frontier,Southwest,United Airlines

Frontier,Southwest, +1 more

Friday

Frontier,Southwest,United Airlines

Frontier,Southwest, +1 more

Saturday

Frontier,Southwest,United Airlines

Frontier,Southwest, +1 more

Sunday

Frontier,Southwest,United Airlines

Frontier,Southwest, +1 more

See more direct flights

Direct returns

Denver Intl to San Francisco

Monday

Frontier,Southwest,United Airlines

Frontier,Southwest, +1 more

Tuesday

Frontier,Southwest,United Airlines

Frontier,Southwest, +1 more

Wednesday

Frontier,Southwest,United Airlines

Frontier,Southwest, +1 more

Thursday

Frontier,Southwest,United Airlines

Frontier,Southwest, +1 more

Friday

Frontier,Southwest,United Airlines

Frontier,Southwest, +1 more

Saturday

Frontier,Southwest,United Airlines

Frontier,Southwest, +1 more

Sunday

Frontier,Southwest,United Airlines

Frontier,Southwest, +1 more

See more direct 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.
5.6
FrontierOverall score based on 2970 reviews
5.9Boarding
5.4Comfort
6.6Crew
4.5Food
4.3Entertainment
Airline reviews

They didn’t offer a water, even after I asked

4.0 Okaysangeetha, Apr 2026
SFO - ATL
Read more Frontier reviews

They didn’t offer a water, even after I asked

It was an early flight and most people napped/slept and the crew let us which was nice.

More inflight connection. And leg space is horrible. And the paying for baggage I'd ridiculous!!!

It was costly and difficult to check in. $85 to take a small suitcase with me, carry on or checked and $75 on the return trip, Plus $25 if I didn't check my self in check in $25, because I couldn't do it on the kiosk. Small very uncomfortable seats, waited on the runway for near an hour each way. It was my worst flight to date.

Due to weather, my flight was delayed, further delayed, then canceled. I eventually got through to a support person who helped me find a different route out of MSP, but to get to DIA, they didn't want to, but eventually did help with the connection ticket purchase. But even this replacement flight was delayed time and time again, and I would have missed my connecting flights and I didn't want to get stuck in a layover city, so after 12 hours at the airport with two young boys who were very tired, we just cancelled our plans and spent the week at home, instead of Nana's.

I knew going into this that Frontier, being a low cost carrier, would be pretty bare bones and charge for most extras but this was made up for by the fact that the airplane was a reasonably new Airbus, every employee was great and best of all, Everett Washington is an amazing airport - thanks Frontier for flying there!!!

Seats were new and comfortable. Staff was fine. Missed my connection due to weather -which wasn’t their fault- but got no help at all. Gate staff sent me to customer service, which was and stayed unstaffed. Sign with QR code directed me to call or chat. Chat was useless. Call was returned after an hour. No itinerary offered by Frontier could get me home in less than 30 hours. Rebooked with another airline and got a partial refund that came to about 10 percent of what I paid to get home.

The experience was good. No frills but I got there safe and sound and on time.

As every law enforcement agency I could imagine surrounded the plane and we didn’t disembark for 2 hours and then had to stick around for another hour to go get our personal belongings after leaving them behind and being bused away from the plane, it was scary and inconvenient. We were given no information as to why this was happening. Lack of communication with passengers was disappointing.

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.

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

Information on your arrival and departure airports