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Fort Collins

$78+ Cheap flights from San Diego (SAN) 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 10/14. Fares are subject to change and may not be available on all flights or dates of travel.
SAN — DEN
Jun 17 — Jun 241
Tue 6/17
Tue 6/24
1 adult, Economy
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Cheapflights Tip: The best prices from San Diego to Fort Collins are usually found in January or February, booked 44 days in advance, depart on a Saturday or Thursday and return on a Tuesday

Cheap flight deals from San Diego to Fort Collins

Keep the following information in mind while searching for San Diego to Fort Collins flight deals. Data was last updated June 12, 2025.

Round-trip from

$127
(Cheapflightsfares)

One-way from

$79
(United Airlines)

Popular in

March

Cheapest in

January

Average price

$235
From San Diego to Fort Collins
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One-way flight from San Diego to Fort Collins
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Highest demand for flights based on searches. 3% potential increase in price ($8 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($6 potential savings vs. average RT price).
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Average for round-trip flights in June 2025
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Find flight deals from San Diego to Fort Collins

Cheapest flights from San Diego to Fort Collins
Explore the most affordable flight options available from San Diego to Fort Collins. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 12, 2025.

This Cheapflightsfares deal was found by Cheapflights users on 6/10. 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.
Wed 7/96:25 amSAN - DEN
Nonstop2h 37mFrontier
Wed 7/169:44 amDEN - SAN
Nonstop2h 26mFrontier
Deal found 6/10$127
This American Airlines deal was found by Cheapflights users on 6/12. 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.
Tue 9/238:15 amSAN - DEN
1 stop5h 12mAmerican Airlines
Sat 9/273:07 pmDEN - SAN
1 stop5h 17mAmerican Airlines
Deal found 6/12$177
This Delta deal was found by Cheapflights users on 6/11. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/269:59 amSAN - DEN
1 stop7h 18mDelta
Sat 8/25:30 amDEN - SAN
1 stop4h 08mDelta
Deal found 6/11$217
This Southwest deal was found by Cheapflights users on 6/10. 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 12/136:30 amSAN - DEN
Nonstop2h 30mSouthwest
Mon 12/151:30 pmDEN - SAN
1 stop4h 25mSouthwest
Deal found 6/10$266
This Alaska Airlines deal was found by Cheapflights users on 6/10. 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.
Tue 9/238:05 amSAN - DEN
2 stops11h 22mAlaska Airlines
Wed 9/249:23 pmDEN - SAN
1 stop13h 51mAlaska Airlines
Deal found 6/10$282

Cheapflights Fare Finder

Customize your flight search to find flights from San Diego 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 June 12, 2025.
Use the filters below to find and compare flights from San Diego to Fort Collins that are best for you.

Fly from

San Diego

Fly to

Fort Collins

Route

Depart

Return

Price

San DiegoDenver

SAN - DEN

SANDEN

San Diego

Wed 7/9

6:25 am-10:02 am

Nonstop2h 37m

Denver Intl

Wed 7/16

9:44 am-11:10 am

Nonstop2h 26m

$127

San DiegoDenver

SAN - DEN

SANDEN

San Diego

Tue 9/23

8:15 am-2:27 pm

1 stop5h 12m

Denver Intl

Sat 9/27

3:07 pm-7:24 pm

1 stop5h 17m

$177

San DiegoDenver

SAN - DEN

SANDEN

San Diego

Sat 7/26

9:45 am-3:00 pm

1 stop4h 15m

Denver Intl

Tue 8/12

7:21 pm-10:54 pm

1 stop4h 33m

$217

San DiegoDenver

SAN - DEN

SANDEN

San Diego

Tue 7/29

7:35 pm-11:00 pm

Nonstop2h 25m

Denver Intl

Thu 7/31

5:35 am-9:15 am

1 stop4h 40m

$225

San DiegoDenver

SAN - DEN

SANDEN

San Diego

Tue 9/23

8:05 am-8:27 pm

2 stops11h 22m

Denver Intl

Wed 9/24

9:23 pm-10:14 am

1 stop13h 51m

$282

San DiegoDenver

SAN - DEN

SANDEN

San Diego

Tue 10/14

8:19 pm-11:47 pm

Nonstop2h 28m

$78

San DiegoDenver

SAN - DEN

SANDEN

San Diego

Tue 9/16

12:52 pm-4:20 pm

Nonstop2h 28m

$79

San DiegoDenver

SAN - DEN

SANDEN

San Diego

Mon 8/11

1:03 pm-4:00 am

1 stop13h 57m

$82

San DiegoDenver

SAN - DEN

SANDEN

San Diego

Tue 7/8

6:15 am-7:19 pm

1 stop12h 04m

$83

San DiegoDenver

SAN - DEN

SANDEN

San Diego

Tue 10/14

10:24 am-6:08 pm

1 stop6h 44m

$88

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/12

Showing 1-10 of 13 results
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Best time to book a flight from San Diego to Fort Collins

Have a flexible travel schedule? Discover the best time to fly to Fort Collins from San Diego 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 Diego to Fort Collins

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

Use this chart to determine the optimal time to book a round-trip flight from San Diego to Fort Collins. Price data was last updated on June 9, 2025.

Booking 44 days in advance of your planned departure date is, on average, the best time to get cheap flights from San Diego 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 Diego to Fort Collins?

Currently, October is the cheapest month in which you can book a flight from San Diego to Fort Collins (average of $197). Flying from San Diego 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 SAN to FC9?

Find hourly flight availability from San Diego 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 June 12, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from San Diego to Fort Collins as you normally would.

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

Use this chart to determine the cheapest time to fly round-trip from San Diego to Fort Collins. Price data was last updated on December 16, 2024.

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

Weekly flight availability from San Diego to Fort Collins

Explore weekly flight availability from San Diego 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 June 12, 2025.

The most flights from SAN to FC9 are scheduled on a Thursday (26 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (10 on average).

Rainfall in Fort Collins by month

Plan your trip to Fort Collins by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Fort Collins ranges from 0.5 - 2.3 inches per month. May is typically the wettest month, when rainfall can reach 2.3 in. January is typically the driest time to visit Fort Collins when rainfall is around 0.5 in.

Temperature in Fort Collins by month

Plan your trip to Fort Collins by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Fort Collins, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 73.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 30.2 F).

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 June 12, 2025.
Read through reviews of airlines operating flights from San Diego to Fort Collins, such as Alaska Airlines, Southwest and Delta. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Overall

8.0

Comfort

7.8

Entertainment

7.1

Boarding

8.1

Crew

8.5

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

Food

7.1

Overall

8.0

Comfort

7.8

Entertainment

7.1

Boarding

8.1

Crew

8.5

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
4,287 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Overall

8.0

Comfort

7.8

Entertainment

7.1

Boarding

8.1

Crew

8.5

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
7,950 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Overall

8.0

Comfort

7.8

Entertainment

7.1

Boarding

8.1

Crew

8.5

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
8,790 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Overall

8.0

Comfort

7.8

Entertainment

7.1

Boarding

8.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
American Airlines
7.2
Good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Overall

8.0

Comfort

7.8

Entertainment

7.1

Boarding

8.1

Crew

8.5

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 Diego 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 Diego to Fort Collins?

    San Diego (SAN) is the airport you will fly out of if you book a flight from San Diego to Fort Collins. You should not have trouble finding flights to Fort Collins from San Diego; the airport handles an average of 20 outbound flights to Fort Collins per day. You should also have plenty of airline options to choose from since 6 airlines have flights from the San Diego airport to Fort Collins. It is only a 2.6 mi journey to San Diego (SAN) from San Diego’s city center.

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

    Flights from San Diego to Fort Collins have been viewed 165 times in the past calendar month.

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

    The cheapest airlines for a one-way flight from San Diego to Fort Collins are United Airlines ($79), Frontier ($82), and Southwest ($88).

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

    No one likes to see their flight delayed. When booking a flight from San Diego to Fort Collins consider choosing Sun Country Air (100%), United Airlines (78%) or Air Canada (77%) as they are the most reliable in getting you off to your destination on time.

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

    Looking at all options, your cheapest flight can be booked for $75. While the most popular route (San Diego - Denver Intl) can be booked for $121 on average our data indicates $1,087 when flying from San Diego to Fort Collins.

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

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

  • How can I find direct flights from San Diego 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 Diego to Fort Collins.

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

    Yes. Cheapflights offers flight deals from San Diego 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 Diego to Fort Collins?

    Currently, October is the cheapest month in which you can book a flight from San Diego to Fort Collins (average of $197). Flying from San Diego 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

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Top 6 airlines flying from San Diego to Fort Collins

Discover the top 6 airlines that operate flights from San Diego 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 June 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$58Average$156FlexibilityNo cancel feeOn-time62%
United AirlinesCheapest$167Average$425FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$176Average$274FlexibilityNo cancel feeOn-time63%
Alaska AirlinesCheapest$177Average$245FlexibilityNo cancel feeOn-time75%
DeltaCheapest$196Average$306FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$197Average$325FlexibilityNo cancel feeOn-time71%

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