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$47 Find cheap flights from San Francisco to Fort Collins

This is the cheapest round-trip flight price found by a KAYAK user in the last 72 hours by searching for a flight from San Francisco to Fort Collins departing on 8/31. 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
0 bags
Sat 7/13
Sat 7/20

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Good to know

Low season

January

High season

July

Cheapest flight

$47
Best time to beat the crowds with an average 14% drop in price.
Most popular time to fly with an average 8% increase in price.
Flight from San Francisco to Denver

When to book flights from San Francisco to Fort Collins

Are your dates flexible? Find out the best times to travel from San Francisco to Fort Collins based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price

FAQs for booking flights from San Francisco to Fort Collins

  • Which airports will I be using when flying from San Francisco to Fort Collins?

    When flying out of San Francisco you’ll be using San Francisco. Fort Collins does not have its own airport so you’ll be flying into nearby Denver Intl airport, which is 54.6 mi away.

  • How long does a flight from San Francisco to Fort Collins take?

    Direct flights cover the 964 miles separating San Francisco and Fort Collins in about 2h 31m.

  • How many flights are there between San Francisco and Fort Collins?

    58 direct flights run between San Francisco and Fort Collins on a daily basis. On average, there are about 406 departures each week.

  • What’s the cheapest day of the week to fly between San Francisco and Fort Collins?

    Consider leaving on a Saturday and avoid Wednesdays if you are looking for the best rates. For your return to San Francisco, you’ll find the best rates on Wednesdays and the most expensive ones on Sundays.

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

    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 Fort Collins.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Fort Collins 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 Fort Collins?

    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 Fort Collins 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 Fort Collins?

    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 Fort Collins from San Francisco up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

  • Which airlines provide the cheapest flights from San Francisco to Fort Collins?

    In the last 72 hours, the cheapest one-way ticket between San Francisco and Fort Collins found on KAYAK was with Frontier for $50. Frontier offered a round-trip connection from $47 and United Airlines from $111.

See more FAQs

Top tips for finding cheap flights from San Francisco to Fort Collins

  • There is no airport in Fort Collins. Instead, you’ll be flying into Denver Airport when flying between San Francisco and Fort Collins.
  • The cheapest flight from San Francisco to Fort Collins was found 55 days before departure, on average.
  • Book at least 1 week before departure in order to get a below-average price.
  • High season is considered to be May, June and July. The cheapest month to fly is January.
See more tips

Top 5 airlines serving San Francisco to Fort Collins

Need help choosing which airline to fly with from San Francisco to Fort Collins? 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.
8.0
Alaska AirlinesOverall score based on 9272 reviews
8.2Boarding
7.3Entertainment
7.9Comfort
8.6Crew
7.3Food
Airline reviews

Crew was great snacks could be approved upon. Healthier options

8.0 ExcellentAnonymous, Jun 2024SFO - ANC
Read more about Alaska Airlines reviews

Crew was great snacks could be approved upon. Healthier options

Everything was great but there were no entertainment options available.

Flight was delayed 2 hours. It was too cold inside the cabin. My seat mate had no jacket so she was shivering the entire flight. The stewardess says there’s no available blanket.

The plane had to sit on the tarmac for 45 minutes once it had landed. Not Alaska’s fault.

Flight was cancelled just before we boarded. I had to stayed an extra night in SF and arrived one day late. Also I had to flight back JFK and not Newark since they didn't have flight to Newark until very late the following day. A real bad experience on this flight. It took me 2 days to get back home.

The flight was delayed by more than two hours. A notification ahead of time would be most helpful.

Plane hit turbulence diverted to Houston. We'll probably get in after 3am

Given incorrect gate upon check-in, corrected by the gate attendant, D6 rather than D5, minor inconvenience. As with the previous flight, passengers were admonished to voluntarily gate-check carry-on luggage with the statement that those in the last boarding group would have no choice but to do so. If the Boeing 737 MAX8/MAX9 doesn't have room for carry-ons it's an interior design flaw on the part of Boeing. Posting an advance warning would be helpful, such as "Boeing 737 MAX planes feature limited carry-on space. Please be aware." SFO's amenities and TSA much better than MCO's. Crew was amazing! Brought my own food because Alaska's onboard selection has soy in everything. Beverage service was excellent. This was the first and last trip with Alaska after the previous flight's issues. It's no reflection on the crew of this flight. They were great.

The flight was mostly smooth and quiet. No seatback screens.

I enjoyed the leg room at my seat, but I was in an exit row.

There was plenty of overhead room but half of the passengers were told they had to check their carryon bags. My partner and I checked in as early as possible and our seats were split across the aisle.

Flew first class so everything was great. But maybe because the flights were red eye, no meals were served, just chips. I flew Alaska Air 1st class at 9PM (2 hour flight) and they served beef short rib sliders!

I'm a larger, athletic guy (6'2", 260lbs powerlifter) and I found the seats incredibly uncomfortable with minimal leg room, especially in a window seat. Now, I full understand that being smaller may change my view but even if I was 80lbs less, my legs would be the same size and I was sandwiched between my seat and the seat in front of me.

There was a loud squeaky sound the whole time we were flying.

I didn’t not like that I could not select my seat and ended up with the worse seat.

The landing was bad and the hostess came two times and i was sleeping but when she served the person that nexts to me I woke up and she didn’t even asked me if I need any drink or snacks two times!!!!

The helpful attitude of the staff, and being a wheelchair passenger everyone was helpful and understanding. The trip was made comfortable by the upgraded seat which was given without my request, that was a great surprise. Thank you Delta.

Plane was late because of a mechanical malfunction and the food listed as available was not. Flight attendants seem over worked and under paid. They just done seem happy. And that can be seen in their faces.

Waited 3 hours on a plane to de-ice due to manpower issues. Waited another hour and a half once we landed because of a gate issue. Missed my connections. Created. A total of 13 hours of delay.

Great, on time departure, friendly and accommodating crew, great leg room, Smith flight

The entertainment wasn’t playing in the app or online.

Horrible, the flights kept delaying, so it is obvious that we won't be able to make it to the next connection. No easier/real agent on site to help you figure this out. UA agent on other counters refuse to assist you and direct us to use the QR code/call customer service. So inefficient and poor. While technology seems convenient, but it's not the best interest/experience for customers need help while there is active issue need assistance.

Flight was delayed due to the late arrival of the catering truck, which is quite unacceptable. There was a beverage service, but no pretzel, or cookie, or nuts were served in coach.

On time take off…US cabins look tired and need of refresh!

Crew was great and did their best to make us comfortable and captain came out at the beginning to announce why the flight was delayed, weather situation up ahead, and kept us updated throughout the flight.

United WiFi is consistently unusable (it can take 10 mins to load a single web page). If you need Wifi to do work, be prepared to lose half a day of productivity.

Awful. I got stuck next to a person carrying a dog and behind someone with a dog. People need to board these dogs downstairs. The cabin is crowded enough with your pets

Packed in like sardines, very uncomfortable. Sitting the aisle my shoulder was rammed into numerous times by rushing flight attendants. Also flight was very cold.

Airline did not explain reasons why flight was delayed two hours. Explanations were badly needed and rarely provided. Problem seemed to clearly be the airline’s fault and not the fault of the weather or airport.

Very uncomfortable seats and seat backs, and I am only 5’9”. Delayed due to crew issues, spent a long time with no ventilation. Teeny overhead bins. Wifi worked well. Arrived safely.

The flight was delayed several times without explanation. The seats were terribly uncomfortable and wifi isn’t included. All these make for a less than ideal flight.

Internet service was erratic. Crew service was poor and slow. My luggage on this non-stop flight was lost and not recovered

Flight was 1/2 hour delayed leaving Phoenix. Otherwise it was an average flight. Flight crew on this trip was very nice.

Horrible - they lied to me about baggage & boarding, even though I specifically spoke to their agents the day before my flight about my issue. When I showed up they did not let me board and stranded me at my airport until I bought a new flight with money I did not have to spend.

The experience was great and much better than the flight going out. of course I was in first class but the service was excellent

Comfort of seats, ease of boarding. Food selection could be better

Food options were limited which is absolutely embarrassing for a Flight of this size The staff did not come around as much and I am not accustomed to such poor service from American Airlines Drinks I believe were limited to soda and water

Because I can’t stand very long in one place, I was allowed to reword.

Crew were attentive and friendly. Flight was smooth and early! I enjoyed the less crowded plane. Thank you!

We are gluten free, there were not any available complimentary gluten free options.

They wouldn’t let us on the flight even tho we were an hour early. No refund not even our bags that were prepaid

I did not enjoy the trip home on Frontier for several reasons: there is too much cost besides the flight, which was more than I would normally pay, then having to pay for luggage, and carry-on, seat (if you want to reserve when booking) then you must pay over $3 for a can of soda, and $4 for a snack. A cup of water is free.

I strongly dislike Frontier. I find them barebones, the seats not particularly comfortable, the nickel and diming is maddening, the app is TERRIBLE - super confusing to navigate, and the last 4 frontier flights I have flown have been on AVERAGE 2 hours late, one ruining a fancy night out in Vegas with reservations made well in advance, which was nodded to with a measly 5000 miles, which translates to almost nothing. At least credit a free checked bag or something.

8 hr delay. had to buy another ticket with another airline

9 hours of delay!! Was not able to check my luggage that I paid for!!!

Frontier won’t help you at the airport without paying $25. Carry on was $75. Then you get on the plain and every beverage or snack is also a charge. Seats are hard and real packed in. I would never fly them again.

The Frontier app wasn’t working. So I could not pay for a carry on the week prior to flying. They charged me 99$ at the gate to carry on a duffle bag.

Plane could have been more on time. More leg room .

Didn't like anything!! Horrible flight. Small seating area and hard seats. Butt was sore after 2 hour flight to Seattle No entertainment or free refreshments No wifi or USB charging receptacles to charge phone entoute like other airliners Luggage rates were 3 times as much as competitors. Difficult to navigate online luggue process to pre pay before flight Overall bad experience WILL NEVER RIDE OR RECOMMEND FRONTIER TO FRIENDS OR FAMILY MEMBERS!!! THIS IS A SHAME!! MOST MESERIBLE FLIGHT OF MY LIFE!! AND I THOUGHT SPIRIT WAS 👎 YOU GOT THEM BEAD HANDS DOWN!!

There were 3 leg for the trip and each leg was delayed by 90 minutes or more. The boarding process takes forever with people waiting on the jetway even though most folks do not have carry-on. The whole process is poorly managed.

Book cheap flights from San Francisco to Fort Collins

Recent round-trip flight deals

8/31Sat
nonstopFrontier
2h 43mSFO-DEN
9/7Sat
nonstopFrontier
2h 42mDEN-SFO
$47
8/5Mon
nonstopFrontier
2h 32mSFO-DEN
8/11Sun
nonstopFrontier
2h 42mDEN-SFO
$57
8/6Tue
nonstopFrontier
2h 32mSFO-DEN
8/13Tue
nonstopFrontier
2h 42mDEN-SFO
$59
8/6Tue
nonstopUnited Airlines
2h 42mSFO-DEN
8/11Sun
nonstopUnited Airlines
2h 40mDEN-SFO
$111
8/12Mon
nonstopUnited Airlines
2h 42mSFO-DEN
8/19Mon
nonstopUnited Airlines
2h 43mDEN-SFO
$125
8/31Sat
1 stopAmerican Airlines
5h 04mSFO-DEN
9/6Fri
1 stopAmerican Airlines
6h 06mDEN-SFO
$158
12/4Wed
1 stopAlaska Airlines
7h 44mSFO-DEN
12/12Thu
1 stopAlaska Airlines
8h 59mDEN-SFO
$178
11/2Sat
1 stopDelta
8h 12mSFO-DEN
11/5Tue
1 stopDelta
11h 23mDEN-SFO
$193
11/7Thu
1 stopDelta
5h 12mSFO-DEN
11/14Thu
1 stopDelta
11h 23mDEN-SFO
$195
11/12Tue
2 stopsAlaska Airlines
14h 13mSFO-DEN
11/15Fri
1 stopAlaska Airlines
8h 32mDEN-SFO
$217

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Recent one-way flight deals

7/5Fri
nonstopFrontier
2h 32mSFO-DEN
$50
7/1Mon
nonstopFrontier
2h 34mSFO-DEN
$59
8/22Thu
nonstopUnited Airlines
2h 35mSFO-DEN
$63
8/22Thu
1 stopAmerican Airlines
7h 35mSFO-DEN
$79
7/16Tue
nonstopUnited Airlines
2h 42mSFO-DEN
$89
7/16Tue
1 stopDelta
4h 59mSFO-DEN
$98
8/11Sun
1 stopAmerican Airlines
7h 35mSFO-DEN
$102
7/15Mon
1 stopDelta
5h 13mSFO-DEN
$118
8/22Thu
2 stopsAlaska Airlines
16h 08mSFO-DEN
$140
8/13Tue
2 stopsAlaska Airlines
12h 19mSFO-DEN
$150

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Last minute flights from San Francisco to Fort Collins

Last minute flight, train and bus deals

6/18Tue
multi-stopFrontier
17h 19mSFO-DEN
6/20Thu
nonstopFrontier
2h 46mDEN-SFO
$151
6/17Mon
nonstopFrontier
2h 34mSFO-DEN
6/22Sat
nonstopFrontier
2h 48mDEN-SFO
$156
6/18Tue
nonstopFrontier
2h 34mSFO-DEN
6/22Sat
nonstopFrontier
2h 47mDEN-SFO
$167
6/18Tue
multi-stopFrontier
21h 34mSFO-DEN
6/26Wed
nonstopFrontier
2h 47mDEN-SFO
$170
6/18Tue
multi-stopFrontier
21h 34mSFO-DEN
7/2Tue
nonstopFrontier
2h 47mDEN-SFO
$172
6/17Mon
nonstopFrontier
2h 34mSFO-DEN
6/24Mon
nonstopFrontier
2h 48mDEN-SFO
$186
6/18Tue
nonstop
2h 34mSFO-DEN
6/22Sat
multi-stop
12h 34mDEN-SFO
$301
6/14Fri
multi-stopUnited Airlines
16h 52mSFO-DEN
6/15Sat
nonstopUnited Airlines
2h 40mDEN-SFO
$329
6/14Fri
multi-stopUnited Airlines
8h 21mSFO-DEN
6/15Sat
nonstopUnited Airlines
2h 43mDEN-SFO
$359
6/14Fri
multi-stopUnited Airlines
9h 09mSFO-DEN
6/15Sat
multi-stopUnited Airlines
10h 51mDEN-SFO
$413

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Flights to Fort Collins