HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Fort Collins

$78+ Cheap flights from San Francisco (SFO) to Fort Collins, CO

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 8/14. Fares are subject to change and may not be available on all flights or dates of travel.
SFO — DEN
Jul 21 — Jul 281
Mon 7/21
Mon 7/28
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from San Francisco to Fort Collins with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheapflights Tip: The best prices from San Francisco to Fort Collins are usually found in January or October, booked 52 days in advance, depart on a Friday or Saturday and return on a Thursday

Cheap flight deals from San Francisco to Fort Collins

Keep the following information in mind while searching for San Francisco to Fort Collins flight deals. Data was last updated July 16, 2025.

Round-trip from

$149
(Cheapflightsfares)

One-way from

$78
(Frontier)

Popular in

June

Cheapest in

January

Average price

$253
From San Francisco to Fort Collins
Search Deals
One-way flight from San Francisco to Fort Collins
Search Deals
Highest demand for flights based on searches. 11% potential increase in price ($30 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($5 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 2025
Search Deals

Find flight deals from San Francisco to Fort Collins

Cheapest flights from San Francisco to Fort Collins
Explore the most affordable flight options available from San Francisco to Fort Collins. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 16, 2025.

This Cheapflightsfares deal was found by Cheapflights users on 7/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/66:00 amSFO - DEN
Nonstop2h 44mFrontier
Sat 11/88:39 pmDEN - SFO
Nonstop2h 48mFrontier
Deal found 7/14$148
This Southwest deal was found by Cheapflights users on 7/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/165:15 amSFO - DEN
Nonstop2h 25mSouthwest
Thu 8/286:00 amDEN - SFO
1 stop7h 15mSouthwest
Deal found 7/15$167
This Alaska Airlines deal was found by Cheapflights users on 7/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/111:30 amSFO - DEN
1 stop7h 57mAlaska Airlines
Thu 10/29:23 pmDEN - SFO
1 stop12h 49mAlaska Airlines
Deal found 7/15$176
This American Airlines deal was found by Cheapflights users on 7/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/153:21 pmSFO - DEN
1 stop5h 44mAmerican Airlines
Thu 8/2811:59 amDEN - SFO
1 stop7h 55mAmerican Airlines
Deal found 7/15$197

Cheapflights Fare Finder

Customize your flight search to find flights from San Francisco to Fort Collins that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated July 16, 2025.
Use the filters below to find and compare flights from San Francisco to Fort Collins that are best for you.

Fly from

San Francisco

Fly to

Fort Collins

Route

Depart

Return

Price

San FranciscoDenver

SFO - DEN

SFODEN

San Francisco

Thu 11/6

6:00 am-9:44 am

Nonstop2h 44m

Denver Intl

Sat 11/8

8:39 pm-10:27 pm

Nonstop2h 48m

$148

San FranciscoDenver

SFO - DEN

SFODEN

San Francisco

Sat 8/16

5:15 am-8:40 am

Nonstop2h 25m

Denver Intl

Thu 8/28

6:00 am-12:15 pm

1 stop7h 15m

$167

San FranciscoDenver

SFO - DEN

SFODEN

San Francisco

Wed 10/1

11:30 am-8:27 pm

1 stop7h 57m

Denver Intl

Thu 10/2

9:23 pm-9:12 am

1 stop12h 49m

$176

San FranciscoDenver

SFO - DEN

SFODEN

San Francisco

Fri 8/15

3:21 pm-10:05 pm

1 stop5h 44m

Denver Intl

Thu 8/28

11:59 am-6:54 pm

1 stop7h 55m

$197

San FranciscoDenver

SFO - DEN

SFODEN

San Francisco

Thu 8/14

6:37 am-10:17 am

Nonstop2h 40m

$78

San FranciscoDenver

SFO - DEN

SFODEN

San Francisco

Mon 10/6

6:20 pm-9:45 pm

Nonstop2h 25m

$79

San FranciscoDenver

SFO - DEN

SFODEN

San Francisco

Sat 11/15

2:46 pm-11:57 pm

1 stop8h 11m

$82

San FranciscoDenver

SFO - DEN

SFODEN

San Francisco

Wed 11/5

2:46 pm-11:59 pm

1 stop8h 13m

$88

San FranciscoDenver

SFO - DEN

SFODEN

San Francisco

Mon 8/25

11:21 am-5:29 pm

1 stop5h 08m

$89

San FranciscoDenver

SFO - DEN

SFODEN

San Francisco

Sun 8/10

9:15 pm-12:48 am

Nonstop2h 33m

$111

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/13

Showing 1-10 of 11 results
1
2

Best time to book a flight from San Francisco to Fort Collins

Have a flexible travel schedule? Discover the best time to fly to Fort Collins from San Francisco with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from San Francisco to Fort Collins

How far ahead should I book a flight from San Francisco to Fort Collins?

Use this chart to determine the optimal time to book a round-trip flight from San Francisco to Fort Collins. Price data was last updated on July 11, 2025.

Booking 52 days in advance of your planned departure date is, on average, the best time to get cheap flights from San Francisco to Fort Collins. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

What is the cheapest month to book a flight from San Francisco to Fort Collins?

Currently, October is the cheapest month in which you can book a flight from San Francisco to Fort Collins (average of $197). Flying from San Francisco to Fort Collins in March is currently the most expensive (average of $278). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from SFO to FC9?

Find hourly flight availability from San Francisco to Fort Collins. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated July 16, 2025.

When flying from San Francisco to Fort Collins, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

What is the cheapest day to fly from San Francisco to Fort Collins?

Use this chart to determine the cheapest time to fly round-trip from San Francisco to Fort Collins. Price data was last updated on October 6, 2024.

Travelers seeking maximum savings on their San Francisco to Fort Collins flight should consider departing on Thursday evenings when fares are most often at their lowest. Sunday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

Weekly flight availability from San Francisco to Fort Collins

Explore weekly flight availability from San Francisco to Fort Collins. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated July 16, 2025.

The most flights from SFO to FC9 are scheduled on a Wednesday (60 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (42 on average).

Reviews of airlines servicing Fort Collins

Get insights into the airlines that provide service to Fort Collins. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Fort Collins. Reviews last updated July 16, 2025.
See what other customers who have flown with Alaska Airlines, Southwest, and Delta from San Francisco to Fort Collins have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.1

Crew

8.5

Overall

8.0

Food

7.1

Comfort

7.8

Boarding

8.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.1

Crew

8.5

Overall

8.0

Food

7.1

Comfort

7.8

Boarding

8.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Southwest
8.0
Very good
4,241 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.1

Crew

8.5

Overall

8.0

Food

7.1

Comfort

7.8

Boarding

8.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Delta
8.0
Very good
7,959 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.1

Crew

8.5

Overall

8.0

Food

7.1

Comfort

7.8

Boarding

8.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Hawaiian Airlines
7.8
Good
2,580 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.1

Crew

8.5

Overall

8.0

Food

7.1

Comfort

7.8

Boarding

8.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
United Airlines
7.4
Good
8,863 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.1

Crew

8.5

Overall

8.0

Food

7.1

Comfort

7.8

Boarding

8.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

Related info for your journey

Find useful and relevant information for your journey from San Francisco to Fort Collins. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from San Francisco to Fort Collins?

    For a flight from San Francisco to Fort Collins, you will be flying from San Francisco. San Francisco (SFO) is just 11.8 mi from the center of the city. San Francisco is the only San Francisco airport and it handles 51 outbound flights to Fort Collins per day. 7 airlines have flights to Fort Collins from San Francisco on a regular basis.

  • How popular is this San Francisco to Fort Collins flight route?

    Within the past month, 267 users have taken a look at flights from San Francisco to Fort Collins.

  • What are the cheapest airlines to fly from San Francisco to Fort Collins one-way?

    One-way options have recently been found by users for as low as $78 on Frontier. Other airlines that offer cheap prices include Southwest from $79 and Alaska Airlines from $88 one-way.

  • What are the most reliable airlines from San Francisco to Fort Collins?

    No one likes to see their flight delayed. When booking a flight from San Francisco to Fort Collins consider choosing Asiana Airlines (78%), Air Canada (76%) or United Airlines (75%) as they are the most reliable in getting you off to your destination on time.

  • What are the cheapest flights from San Francisco to Fort Collins?

    On average you can expect to pay $784 for a flight from San Francisco to Fort Collins. The cheapest flight overall is $81 while the most popular route, (San Francisco - Denver Intl) is currently priced at $106.

  • Can I find deals for flights from San Francisco to Fort Collins that include hotel bookings?

    Yes. In addition to deals on San Francisco to Fort Collins flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from San Francisco to Fort Collins?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from San Francisco to Fort Collins.

  • Can I find deals for business class flights from San Francisco to Fort Collins?

    Yes. Cheapflights offers flight deals from San Francisco to Fort Collins by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from San Francisco to Fort Collins?

    Currently, October is the cheapest month in which you can book a flight from San Francisco to Fort Collins (average of $197). Flying from San Francisco to Fort Collins in March is currently the most expensive (average of $278). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for San Francisco to Fort Collins

See prices for flight routes from nearby airports that may be better suited for you.
Los Angeles to Denver flights
San Francisco to Denver flights
Ontario to Denver flights
Santa Ana to Denver flights
San Diego to Denver flights
Sacramento to Denver flights
San Jose to Denver flights
Las Vegas to Denver flights
Burbank to Denver flights
Los Angeles to Aspen flights
Los Angeles to Colorado Springs flights
Reno to Denver flights
Oakland to Denver flights
Palm Springs to Denver flights
Long Beach to Denver flights
San Francisco to Aspen flights
Fresno to Denver flights
San Luis Obispo to Denver flights
Medford to Denver flights
Monterey to Denver flights
Ontario to Aspen flights
Ontario to Colorado Springs flights
San Francisco to Durango flights
Los Angeles to Montrose flights
San Francisco to Montrose flights
Santa Barbara to Denver flights
Santa Rosa to Denver flights
Bakersfield to Denver flights
San Diego to Colorado Springs flights
Arcata to Denver flights
Los Angeles to Grand Junction flights
Los Angeles to Durango flights
San Francisco to Grand Junction flights
San Francisco to Colorado Springs flights
Los Angeles to Vail flights
Las Vegas to Colorado Springs flights
Ontario to Grand Junction flights
Redding to Denver flights
Santa Ana to Colorado Springs flights
Ontario to Montrose flights
Ontario to Durango flights
San Diego to Aspen flights
San Francisco to Hayden flights
Santa Ana to Aspen flights
San Jose to Colorado Springs flights
Burbank to Colorado Springs flights
Fresno to Colorado Springs flights
Los Angeles to Hayden flights
San Jose to Durango flights
Burbank to Grand Junction flights

Top 7 airlines flying from San Francisco to Fort Collins

Discover the top 7 airlines that operate flights from San Francisco to Fort Collins. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated July 16, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$60Average$168FlexibilityNo cancel feeOn-time62%
Allegiant AirCheapest$88Average$100FlexibilityNo cancel feeOn-time88%
Alaska AirlinesCheapest$116Average$264FlexibilityNo cancel feeOn-time75%
SouthwestCheapest$157Average$276FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$159Average$441FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$182Average$319FlexibilityNo cancel feeOn-time71%
DeltaCheapest$196Average$266FlexibilityNo cancel feeOn-timeN/A

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.