$89+ 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 8/15. Fares are subject to change and may not be available on all flights or dates of travel.
SAN — DEN
Aug 14 — Aug 211
Round-trip
1 adult, Economy
We work with more than 300 partners to bring you better travel deals
Find cheap flights from San Diego 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 Diego to Fort Collins are usually found in February or January, booked 63 days in advance, depart on a Friday or Saturday and return on a Thursday
Cheap flight deals from San Diego to Fort Collins
Cheapest
Best
Last-minute
One-way
Cheapest flights from San Diego to Fort CollinsExplore 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 July 15, 2026.
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 July 15, 2026.
This Kiwi.com deal was found by Cheapflights users on 7/12. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/43:03 pm
SAN
- DEN
1 stop11h 47m
Frontier
Thu 8/610:29 pm
DEN
- SAN
Nonstop2h 22m
Frontier
Deal found 7/12![Frontier logo]()
$165
This Kiwi.com deal was found by Cheapflights users on 7/11. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/53:03 pm
SAN
- DEN
1 stop5h 38m
Frontier
Sun 8/97:45 am
DEN
- SAN
Nonstop2h 25m
Frontier
Deal found 7/11![Frontier logo]()
$166
This Super.com deal was found by Cheapflights users on 7/10. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/16:25 am
SAN
- DEN
Nonstop2h 38m
Frontier
Thu 8/610:29 pm
DEN
- SAN
Nonstop2h 22m
Frontier
Deal found 7/10![Frontier logo]()
$167
This WAYA deal was found by Cheapflights users on 7/12. 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 WAYA is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/65:15 pm
SAN
- DEN
1 stop5h 50m
Multiple Airlines
Thu 8/139:15 am
DEN
- SAN
1 stop7h 28m
Multiple Airlines
Deal found 7/12![Multiple Airlines logo]()
$168
This Frontier deal was found by Cheapflights users on 7/10. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/226:25 am
SAN
- DEN
Nonstop2h 33m
Frontier
Sat 10/243:09 pm
DEN
- SAN
1 stop5h 28m
Frontier
Deal found 7/10![Frontier logo]()
$170
This Booking.com deal was found by Cheapflights users on 7/10. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/310:00 am
SAN
- DEN
Nonstop2h 41m
Frontier
Sat 8/810:29 pm
DEN
- SAN
Nonstop2h 22m
Frontier
Deal found 7/10![Frontier logo]()
$171
This Kiwi.com deal was found by Cheapflights users on 7/11. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/16:25 am
SAN
- DEN
Nonstop2h 38m
Frontier
Wed 8/59:15 am
DEN
- SAN
1 stop7h 35m
Frontier
Deal found 7/11![Frontier logo]()
$172
This Frontier deal was found by Cheapflights users on 7/13. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/138:51 pm
SAN
- DEN
1 stop11h 14m
Frontier
Sat 8/2210:29 pm
DEN
- SAN
Nonstop2h 22m
Frontier
Deal found 7/13![Frontier logo]()
$173
This Cheapflightsfares deal was found by Cheapflights users on 7/11. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/66:25 am
SAN
- DEN
Nonstop2h 38m
Frontier
Sun 8/92:00 pm
DEN
- SAN
1 stop10h 59m
Frontier
Deal found 7/11![Frontier logo]()
$174
This Kiwi.com deal was found by Cheapflights users on 7/10. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/68:51 pm
SAN
- DEN
1 stop5h 59m
Frontier
Mon 8/109:15 am
DEN
- SAN
1 stop7h 28m
Frontier
Deal found 7/10![Frontier logo]()
$175
This Cheapflightsfares deal was found by Cheapflights users on 7/13. 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.
Fri 8/146:25 am
SAN
- DEN
Nonstop2h 38m
Frontier
Sun 8/1610:29 pm
DEN
- SAN
Nonstop2h 22m
Frontier
Deal found 7/13![Frontier logo]()
$176
This Super.com deal was found by Cheapflights users on 7/10. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/310:00 am
SAN
- DEN
Nonstop2h 41m
Frontier
Wed 8/510:29 pm
DEN
- SAN
Nonstop2h 22m
Frontier
Deal found 7/10![Frontier logo]()
$177
Best flights from San Diego to Fort CollinsDiscover carefully curated flight deals from San Diego to Fort Collins that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated July 15, 2026.
Discover carefully curated flight deals from San Diego to Fort Collins that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated July 15, 2026.
This Southwest 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/251:40 pm
SAN
- DEN
Nonstop2h 25m
Southwest
Sat 8/291:35 pm
DEN
- SAN
2 stops6h 15m
Southwest
Deal found 7/14![Southwest logo]()
$188
This Delta deal was found by Cheapflights users on 7/10. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/2110:57 am
SAN
- DEN
1 stop6h 13m
Delta
Tue 10/271:00 pm
DEN
- SAN
1 stop4h 01m
Delta
Deal found 7/10![Delta logo]()
$197
This United Airlines deal was found by Cheapflights users on 7/13. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/114:07 pm
SAN
- DEN
Nonstop2h 29m
United Airlines
Thu 8/137:05 pm
DEN
- SAN
Nonstop2h 29m
United Airlines
Deal found 7/13![United Airlines logo]()
$347
This Southwest 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/221:55 pm
SAN
- DEN
1 stop4h 40m
Southwest
Tue 8/2512:35 pm
DEN
- SAN
1 stop5h 00m
Southwest
Deal found 7/14![Southwest logo]()
$192
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/1110:00 am
SAN
- DEN
1 stop7h 10m
Delta
Sun 11/156:30 am
DEN
- SAN
1 stop5h 00m
Delta
Deal found 7/14![Delta logo]()
$207
This Southwest 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/85:30 pm
SAN
- DEN
1 stop4h 35m
Southwest
Mon 10/128:50 pm
DEN
- SAN
1 stop4h 15m
Southwest
Deal found 7/14![Southwest logo]()
$212
This Delta deal was found by Cheapflights users on 7/10. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/315:01 pm
SAN
- DEN
1 stop4h 39m
Delta
Fri 8/76:28 pm
DEN
- SAN
1 stop6h 22m
Delta
Deal found 7/10![Delta logo]()
$263
This Southwest 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/42:40 pm
SAN
- DEN
1 stop4h 30m
Southwest
Mon 9/76:40 am
DEN
- SAN
1 stop4h 40m
Southwest
Deal found 7/14![Southwest logo]()
$252
This Southwest deal was found by Cheapflights users on 7/13. 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.
Sun 10/186:55 am
SAN
- DEN
1 stop3h 50m
Southwest
Thu 10/225:00 pm
DEN
- SAN
1 stop4h 05m
Southwest
Deal found 7/13![Southwest logo]()
$252
This Southwest deal was found by Cheapflights users on 7/10. 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.
Sun 12/67:50 pm
SAN
- DEN
1 stop3h 55m
Southwest
Fri 12/111:55 pm
DEN
- SAN
1 stop4h 00m
Southwest
Deal found 7/10![Southwest logo]()
$258
This Southwest deal was found by Cheapflights users on 7/10. 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.
Mon 8/35:10 pm
SAN
- DEN
1 stop4h 15m
Southwest
Sat 8/81:35 pm
DEN
- SAN
2 stops6h 15m
Southwest
Deal found 7/10![Southwest logo]()
$318
This Southwest deal was found by Cheapflights users on 7/10. 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.
Mon 12/288:00 am
SAN
- DEN
1 stop4h 15m
Southwest
Tue 12/295:40 am
DEN
- SAN
1 stop5h 00m
Southwest
Deal found 7/10![Southwest logo]()
$352
Last-minute flights from San Diego to Fort CollinsDiscover last-minute flight deals from San Diego to Fort Collins. Data last updated July 15, 2026 and is based on user searches.
Discover last-minute flight deals from San Diego to Fort Collins. Data last updated July 15, 2026 and is based on user searches.
This Super.com deal was found by Cheapflights users on 7/10. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/16:25 am
SAN
- DEN
Nonstop2h 38m
Frontier
Thu 8/610:29 pm
DEN
- SAN
Nonstop2h 22m
Frontier
Deal found 7/10![Frontier logo]()
$167
This Kiwi.com deal was found by Cheapflights users on 7/11. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/16:25 am
SAN
- DEN
Nonstop2h 38m
Frontier
Wed 8/59:15 am
DEN
- SAN
1 stop7h 35m
Frontier
Deal found 7/11![Frontier logo]()
$172
This Kiwi.com deal was found by Cheapflights users on 7/11. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/26:25 am
SAN
- DEN
Nonstop2h 38m
Frontier
Thu 8/610:29 pm
DEN
- SAN
Nonstop2h 22m
Frontier
Deal found 7/11![Frontier logo]()
$170
This Booking.com deal was found by Cheapflights users on 7/10. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/310:00 am
SAN
- DEN
Nonstop2h 41m
Frontier
Sat 8/810:29 pm
DEN
- SAN
Nonstop2h 22m
Frontier
Deal found 7/10![Frontier logo]()
$171
This Super.com deal was found by Cheapflights users on 7/10. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/310:00 am
SAN
- DEN
Nonstop2h 41m
Frontier
Wed 8/510:29 pm
DEN
- SAN
Nonstop2h 22m
Frontier
Deal found 7/10![Frontier logo]()
$177
This Kiwi.com deal was found by Cheapflights users on 7/12. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/43:03 pm
SAN
- DEN
1 stop11h 47m
Frontier
Thu 8/610:29 pm
DEN
- SAN
Nonstop2h 22m
Frontier
Deal found 7/12![Frontier logo]()
$165
This Kiwi.com deal was found by Cheapflights users on 7/11. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/53:03 pm
SAN
- DEN
1 stop5h 38m
Frontier
Sun 8/97:45 am
DEN
- SAN
Nonstop2h 25m
Frontier
Deal found 7/11![Frontier logo]()
$166
This WAYA deal was found by Cheapflights users on 7/12. 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 WAYA is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/65:15 pm
SAN
- DEN
1 stop5h 50m
Multiple Airlines
Thu 8/139:15 am
DEN
- SAN
1 stop7h 28m
Multiple Airlines
Deal found 7/12![Multiple Airlines logo]()
$168
This Cheapflightsfares deal was found by Cheapflights users on 7/11. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/66:25 am
SAN
- DEN
Nonstop2h 38m
Frontier
Sun 8/910:29 pm
DEN
- SAN
1 stop26h 30m
Frontier
Deal found 7/11![Frontier logo]()
$174
This Kiwi.com deal was found by Cheapflights users on 7/10. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/68:51 pm
SAN
- DEN
1 stop5h 59m
Frontier
Mon 8/109:15 am
DEN
- SAN
1 stop7h 28m
Frontier
Deal found 7/10![Frontier logo]()
$175
This Frontier deal was found by Cheapflights users on 7/13. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/138:51 pm
SAN
- DEN
1 stop11h 14m
Frontier
Sat 8/2210:29 pm
DEN
- SAN
Nonstop2h 22m
Frontier
Deal found 7/13![Frontier logo]()
$173
This Cheapflightsfares deal was found by Cheapflights users on 7/13. 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.
Fri 8/146:25 am
SAN
- DEN
Nonstop2h 38m
Frontier
Mon 8/177:45 am
DEN
- SAN
Nonstop2h 25m
Frontier
Deal found 7/13![Frontier logo]()
$176
One-way flights from San Diego to Fort CollinsSearch for one-way flight options from San Diego to Fort Collins. Find affordable one-way fares based on user searches. Data last updated July 15, 2026.
Search for one-way flight options from San Diego to Fort Collins. Find affordable one-way fares based on user searches. Data last updated July 15, 2026.
This Frontier deal was found by Cheapflights users on 7/13. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/156:25 am
SAN
- DEN
Nonstop2h 38m
Frontier
Deal found 7/13![Frontier logo]()
$89
This Kiwi.com deal was found by Cheapflights users on 7/12. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/129:43 pm
SAN
- DEN
1 stop5h 09m
Frontier
Deal found 7/12![Frontier logo]()
$90
This Super.com deal was found by Cheapflights users on 7/12. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/233:45 pm
SAN
- DEN
Nonstop2h 35m
Frontier
Deal found 7/12![Frontier logo]()
$91
This Kiwi.com deal was found by Cheapflights users on 7/13. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/114:28 pm
SAN
- DEN
2 stops10h 22m
Frontier
Deal found 7/13![Frontier logo]()
$92
This Kiwi.com deal was found by Cheapflights users on 7/13. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/249:57 am
SAN
- DEN
1 stop4h 41m
Frontier
Deal found 7/13![Frontier logo]()
$93
This Southwest 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/199:05 am
SAN
- DEN
1 stop3h 55m
Southwest
Deal found 7/14![Southwest logo]()
$94
This Kiwi.com deal was found by Cheapflights users on 7/12. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/99:57 am
SAN
- DEN
2 stops10h 33m
Frontier
Deal found 7/12![Frontier logo]()
$95
This American Airlines deal was found by Cheapflights users on 7/10. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/812:48 pm
SAN
- DEN
1 stop4h 41m
American Airlines
Deal found 7/10![American Airlines logo]()
$96
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/44:12 pm
SAN
- DEN
2 stops28h 29m
Frontier
Deal found 7/14![Frontier logo]()
$97
This Kiwi.com deal was found by Cheapflights users on 7/13. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/151:35 pm
SAN
- DEN
1 stop6h 54m
Frontier
Deal found 7/13![Frontier logo]()
$98
This Delta deal was found by Cheapflights users on 7/13. 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.
Wed 10/216:15 am
SAN
- DEN
1 stop4h 50m
Delta
Deal found 7/13![Delta logo]()
$99
This Cheapflightsfares 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/310:00 am
SAN
- DEN
Nonstop2h 41m
Frontier
Deal found 7/15![Frontier logo]()
$100
Find 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 July 15, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $165 (Kiwi.com) |
One-way from | $89 (Frontier) |
Popular in | June |
Cheapest in | February |
Average price | $237 |
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 July 15, 2026.
Use the filters below to find and compare flights from San Diego to Fort Collins that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
San DiegoDenver
SAN - DEN
SANDEN
San Diego
Tue 8/25
1:40 pm-5:05 pm
Nonstop2h 25m
Denver Intl
Sat 8/29
1:35 pm-6:50 pm
2 stops6h 15m
$188
San DiegoDenver
SAN - DEN
SANDEN
San Diego
Sat 8/22
1:55 pm-7:35 pm
1 stop4h 40m
Denver Intl
Tue 8/25
12:35 pm-4:35 pm
1 stop5h 00m
$192
San DiegoDenver
SAN - DEN
SANDEN
San Diego
Wed 10/21
10:57 am-6:10 pm
1 stop6h 13m
Denver Intl
Tue 10/27
1:00 pm-4:01 pm
1 stop4h 01m
$197
San DiegoDenver
SAN - DEN
SANDEN
San Diego
Wed 11/11
10:00 am-6:10 pm
1 stop7h 10m
Denver Intl
Sun 11/15
6:30 am-10:30 am
1 stop5h 00m
$207
San DiegoDenver
SAN - DEN
SANDEN
San Diego
Thu 10/8
5:30 pm-11:05 pm
1 stop4h 35m
Denver Intl
Mon 10/12
8:50 pm-12:05 am
1 stop4h 15m
$212
San DiegoDenver
SAN - DEN
SANDEN
San Diego
Fri 9/4
2:40 pm-8:10 pm
1 stop4h 30m
Denver Intl
Mon 9/7
6:40 am-10:20 am
1 stop4h 40m
$252
San DiegoDenver
SAN - DEN
SANDEN
San Diego
Sun 10/18
6:55 am-11:45 am
1 stop3h 50m
Denver Intl
Thu 10/22
5:00 pm-8:05 pm
1 stop4h 05m
$252
San DiegoDenver
SAN - DEN
SANDEN
San Diego
Sun 12/6
7:50 pm-12:45 am
1 stop3h 55m
Denver Intl
Fri 12/11
1:55 pm-4:55 pm
1 stop4h 00m
$258
San DiegoDenver
SAN - DEN
SANDEN
San Diego
Fri 7/31
5:01 pm-10:40 pm
1 stop4h 39m
Denver Intl
Fri 8/7
6:28 pm-11:50 pm
1 stop6h 22m
$263
San DiegoDenver
SAN - DEN
SANDEN
San Diego
Mon 8/3
5:10 pm-10:25 pm
1 stop4h 15m
Denver Intl
Sat 8/8
1:35 pm-6:50 pm
2 stops6h 15m
$318
Showing 1-10 of 23 resultsSorted by cheapest first
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.
SAN-DEN
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
SAN-FC9
SAN-DEN
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 July 15, 2026.
When flying from San Diego to Fort Collins, the time of day you fly usually plays a role in the price. Save by searching for a flight in the evening, which can drop the price by up to 26% versus a flight in the afternoon.
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 July 15, 2026.
The most flights from SAN to FC9 are scheduled on a Monday (33 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (15 on average).
How much does it cost to fly round-trip from San Diego to Fort Collins?
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 July 11, 2026.
Travelers seeking maximum savings on their San Diego to Fort Collins flight should consider departing on Tuesday at noon when fares are most often at their lowest. Tuesday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.
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 15, 2026.
Read through reviews of airlines operating flights from San Diego to Fort Collins, such as Southwest,Alaska Airlines, andHawaiian Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Food
7.0
Overall
8.0
Boarding
8.1
Comfort
8.0
Crew
8.6
Entertainment
7.5
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Food
7.0
Overall
8.0
Boarding
8.1
Comfort
8.0
Crew
8.6
Entertainment
7.5
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Food
7.0
Overall
8.0
Boarding
8.1
Comfort
8.0
Crew
8.6
Entertainment
7.5
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Food
7.0
Overall
8.0
Boarding
8.1
Comfort
8.0
Crew
8.6
Entertainment
7.5
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Food
7.0
Overall
8.0
Boarding
8.1
Comfort
8.0
Crew
8.6
Entertainment
7.5
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Food
7.0
Overall
8.0
Boarding
8.1
Comfort
8.0
Crew
8.6
Entertainment
7.5
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
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.
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
Complete your trip
Flights by cabin class
Other flight options
Other flights from San Diego
Popular flights
Top destinations
Alternative routes for San Diego to Fort Collins
See prices for flight routes from nearby airports that may be better suited for you.
Complete your trip
Complete your trip to Fort Collins by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from San Diego to Fort Collins by cabin class
Find flights from San Diego to Fort Collins, based on your preferred cabin class, be it economy, premium economy, business, or first class.
San Diego and Fort Collins flights
Browse other San Diego and Fort Collins flight options. Last updated on July 15, 2026.
Other flights from San Diego
Browse through other flights departing from San Diego. Flights are based on user searches made on Cheapflights and were last updated on July 15, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
San Diego to Fort Collins flights
Consider these flights traveling from San Diego to Fort Collins.
Top 5 airlines flying from San Diego to Fort Collins
Discover the top 5 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 July 15, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$47 | Average$141 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$68 | Average$167 | FlexibilityNo cancel fee | On-time85% | |
| Cheapest$115 | Average$206 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$117 | Average$227 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$117 | Average$275 | FlexibilityNo cancel fee | On-time69% |