$52+ 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 3/23. Fares are subject to change and may not be available on all flights or dates of travel.
SAN — DEN
Apr 11 — Apr 181
Round-trip
1 adult, Economy
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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 December, booked 39 days in advance, depart on a Friday or Thursday 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 March 12, 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 March 12, 2026.
This Trip.com deal was found by Cheapflights users on 3/9. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/211:42 am
SAN
- DEN
Nonstop2h 41m
Frontier
Sat 5/99:30 pm
DEN
- SAN
Nonstop2h 36m
Frontier
Deal found 3/9![Frontier logo]()
$60
This Kiwi.com deal was found by Cheapflights users on 3/11. 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.
Fri 4/39:28 pm
SAN
- DEN
Nonstop2h 33m
Frontier
Tue 4/710:30 pm
DEN
- SAN
Nonstop2h 32m
Frontier
Deal found 3/11![Frontier logo]()
$64
This Super.com deal was found by Cheapflights users on 3/10. 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.
Thu 4/236:25 am
SAN
- DEN
Nonstop2h 37m
Frontier
Sun 4/267:00 am
DEN
- SAN
Nonstop2h 34m
Frontier
Deal found 3/10![Frontier logo]()
$70
This Super.com deal was found by Cheapflights users on 3/10. 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.
Thu 4/236:25 am
SAN
- DEN
Nonstop2h 37m
Frontier
Mon 4/277:00 am
DEN
- SAN
Nonstop2h 34m
Frontier
Deal found 3/10![Frontier logo]()
$71
This Cheapflightsfares deal was found by Cheapflights users on 3/9. 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 5/16:25 am
SAN
- DEN
Nonstop2h 37m
Frontier
Sun 5/310:29 pm
DEN
- SAN
Nonstop2h 30m
Frontier
Deal found 3/9![Frontier logo]()
$72
This Super.com deal was found by Cheapflights users on 3/9. 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 3/239:08 pm
SAN
- DEN
Nonstop2h 29m
Frontier
Mon 3/3010:29 pm
DEN
- SAN
Nonstop2h 39m
Frontier
Deal found 3/9![Frontier logo]()
$80
This Kiwi.com deal was found by Cheapflights users on 3/8. 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.
Fri 4/39:28 pm
SAN
- DEN
Nonstop2h 33m
Frontier
Fri 4/1010:30 pm
DEN
- SAN
Nonstop2h 32m
Frontier
Deal found 3/8![Frontier logo]()
$81
This Cheapflightsfares deal was found by Cheapflights users on 3/9. 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 4/39:28 pm
SAN
- DEN
Nonstop2h 33m
Frontier
Wed 4/810:30 pm
DEN
- SAN
Nonstop2h 32m
Frontier
Deal found 3/9![Frontier logo]()
$82
This Cheapflightsfares deal was found by Cheapflights users on 3/7. 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 4/39:28 pm
SAN
- DEN
Nonstop2h 33m
Frontier
Mon 4/610:30 pm
DEN
- SAN
Nonstop2h 32m
Frontier
Deal found 3/7![Frontier logo]()
$84
This Expedia deal was found by Cheapflights users on 3/9. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/16:25 am
SAN
- DEN
Nonstop2h 40m
Multiple Airlines
Sat 4/47:25 am
DEN
- SAN
Nonstop2h 41m
Multiple Airlines
Deal found 3/9![Multiple Airlines logo]()
$87
This Cheapflightsfares deal was found by Cheapflights users on 3/8. 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.
Sat 5/236:25 am
SAN
- DEN
Nonstop2h 44m
Frontier
Sun 5/248:52 am
DEN
- SAN
Nonstop2h 29m
Frontier
Deal found 3/8![Frontier logo]()
$88
This Orbitz deal was found by Cheapflights users on 3/10. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/88:42 am
SAN
- DEN
Nonstop2h 38m
Multiple Airlines
Sat 4/1110:30 pm
DEN
- SAN
Nonstop2h 32m
Multiple Airlines
Deal found 3/10![Multiple Airlines logo]()
$89
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 March 12, 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 March 12, 2026.
This Southwest deal was found by Cheapflights users on 3/7. 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 4/306:55 pm
SAN
- DEN
1 stop4h 30m
Southwest
Sun 5/36:00 am
DEN
- SAN
Nonstop2h 25m
Southwest
Deal found 3/7![Southwest logo]()
$127
This Southwest deal was found by Cheapflights users on 3/8. 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 4/86:30 am
SAN
- DEN
1 stop4h 50m
Southwest
Tue 4/148:55 am
DEN
- SAN
1 stop4h 45m
Southwest
Deal found 3/8![Southwest logo]()
$132
This United Airlines deal was found by Cheapflights users on 3/11. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/510:55 am
SAN
- DEN
1 stop5h 57m
United Airlines
Wed 5/63:44 pm
DEN
- SAN
1 stop5h 19m
United Airlines
Deal found 3/11![United Airlines logo]()
$267
This Southwest deal was found by Cheapflights users on 3/8. 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 4/175:55 pm
SAN
- DEN
1 stop4h 00m
Southwest
Mon 4/205:10 pm
DEN
- SAN
1 stop3h 45m
Southwest
Deal found 3/8![Southwest logo]()
$132
This Delta deal was found by Cheapflights users on 3/10. 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 3/186:15 am
SAN
- DEN
1 stop4h 18m
Delta
Wed 3/256:15 pm
DEN
- SAN
1 stop6h 33m
Delta
Deal found 3/10![Delta logo]()
$368
This Southwest deal was found by Cheapflights users on 3/11. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/88:40 am
SAN
- DEN
2 stops5h 25m
Southwest
Wed 4/84:25 pm
DEN
- SAN
1 stop4h 00m
Southwest
Deal found 3/11![Southwest logo]()
$217
This Southwest deal was found by Cheapflights users on 3/9. 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 4/228:40 am
SAN
- DEN
2 stops5h 25m
Southwest
Fri 4/248:10 pm
DEN
- SAN
1 stop3h 55m
Southwest
Deal found 3/9![Southwest logo]()
$257
This United Airlines deal was found by Cheapflights users on 3/11. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 3/206:30 am
SAN
- DEN
Nonstop2h 28m
United Airlines
Sun 3/228:00 pm
DEN
- SAN
1 stop4h 40m
United Airlines
Deal found 3/11![United Airlines logo]()
$668
This Delta deal was found by Cheapflights users on 3/9. 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.
Tue 4/76:20 am
SAN
- DEN
2 stops7h 47m
Delta
Sat 4/116:30 am
DEN
- SAN
1 stop4h 25m
Delta
Deal found 3/9![Delta logo]()
$780
This Delta deal was found by Cheapflights users on 3/7. 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 4/310:40 am
SAN
- DEN
2 stops8h 17m
Delta
Mon 4/66:15 pm
DEN
- SAN
1 stop6h 33m
Delta
Deal found 3/7![Delta logo]()
$981
This Delta deal was found by Cheapflights users on 3/9. 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 3/1810:00 am
SAN
- DEN
2 stops8h 57m
Delta
Sat 3/216:15 pm
DEN
- SAN
1 stop4h 40m
Delta
Deal found 3/9![Delta logo]()
$1,030
Last-minute flights from San Diego to Fort CollinsDiscover last-minute flight deals from San Diego to Fort Collins. Data last updated March 12, 2026 and is based on user searches.
Discover last-minute flight deals from San Diego to Fort Collins. Data last updated March 12, 2026 and is based on user searches.
This Super.com deal was found by Cheapflights users on 3/9. 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.
Tue 3/176:25 am
SAN
- DEN
Nonstop2h 35m
Frontier
Fri 4/310:30 pm
DEN
- SAN
Nonstop2h 32m
Frontier
Deal found 3/9![Frontier logo]()
$91
This Super.com deal was found by Cheapflights users on 3/9. 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 3/239:08 pm
SAN
- DEN
Nonstop2h 29m
Frontier
Mon 3/3010:29 pm
DEN
- SAN
Nonstop2h 39m
Frontier
Deal found 3/9![Frontier logo]()
$80
This Expedia deal was found by Cheapflights users on 3/9. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/16:25 am
SAN
- DEN
Nonstop2h 40m
Multiple Airlines
Sat 4/47:25 am
DEN
- SAN
Nonstop2h 41m
Multiple Airlines
Deal found 3/9![Multiple Airlines logo]()
$87
This Kiwi.com deal was found by Cheapflights users on 3/9. 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 4/16:25 am
SAN
- DEN
Nonstop2h 40m
Frontier
Sat 4/410:40 pm
DEN
- SAN
1 stop9h 41m
Frontier
Deal found 3/9![Frontier logo]()
$90
This Kiwi.com deal was found by Cheapflights users on 3/11. 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.
Fri 4/39:28 pm
SAN
- DEN
Nonstop2h 33m
Frontier
Tue 4/710:30 pm
DEN
- SAN
Nonstop2h 32m
Frontier
Deal found 3/11![Frontier logo]()
$64
This Kiwi.com deal was found by Cheapflights users on 3/8. 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.
Fri 4/39:28 pm
SAN
- DEN
Nonstop2h 33m
Frontier
Fri 4/1010:30 pm
DEN
- SAN
Nonstop2h 32m
Frontier
Deal found 3/8![Frontier logo]()
$81
This Cheapflightsfares deal was found by Cheapflights users on 3/9. 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 4/39:28 pm
SAN
- DEN
Nonstop2h 33m
Frontier
Wed 4/810:30 pm
DEN
- SAN
Nonstop2h 32m
Frontier
Deal found 3/9![Frontier logo]()
$82
This Cheapflightsfares deal was found by Cheapflights users on 3/7. 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 4/39:28 pm
SAN
- DEN
Nonstop2h 33m
Frontier
Mon 4/610:30 pm
DEN
- SAN
Nonstop2h 32m
Frontier
Deal found 3/7![Frontier logo]()
$84
This Orbitz deal was found by Cheapflights users on 3/10. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/88:42 am
SAN
- DEN
Nonstop2h 38m
Multiple Airlines
Sat 4/1110:30 pm
DEN
- SAN
Nonstop2h 32m
Multiple Airlines
Deal found 3/10![Multiple Airlines logo]()
$89
This Super.com deal was found by Cheapflights users on 3/10. 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.
Thu 4/236:25 am
SAN
- DEN
Nonstop2h 37m
Frontier
Sun 4/267:00 am
DEN
- SAN
Nonstop2h 34m
Frontier
Deal found 3/10![Frontier logo]()
$70
This Super.com deal was found by Cheapflights users on 3/10. 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.
Thu 4/236:25 am
SAN
- DEN
Nonstop2h 37m
Frontier
Mon 4/277:00 am
DEN
- SAN
Nonstop2h 34m
Frontier
Deal found 3/10![Frontier logo]()
$71
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 March 12, 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 March 12, 2026.
This Kiwi.com deal was found by Cheapflights users on 3/9. 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 3/239:08 pm
SAN
- DEN
Nonstop2h 29m
Frontier
Deal found 3/9![Frontier logo]()
$52
This Kiwi.com deal was found by Cheapflights users on 3/9. 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 5/236:25 am
SAN
- DEN
Nonstop2h 44m
Frontier
Deal found 3/9![Frontier logo]()
$53
This Kiwi.com deal was found by Cheapflights users on 3/11. 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.
Tue 4/78:05 pm
SAN
- DEN
Nonstop2h 39m
Hawaiian Airlines
Deal found 3/11![Hawaiian Airlines logo]()
$55
This Southwest deal was found by Cheapflights users on 3/11. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/296:20 am
SAN
- DEN
1 stop4h 20m
Southwest
Deal found 3/11![Southwest logo]()
$56
This eDestinos deal was found by Cheapflights users on 3/7. 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 eDestinos is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/176:25 am
SAN
- DEN
Nonstop2h 35m
Frontier
Deal found 3/7![Frontier logo]()
$58
This Southwest deal was found by Cheapflights users on 3/10. 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 4/207:00 pm
SAN
- DEN
Nonstop2h 20m
Southwest
Deal found 3/10![Southwest logo]()
$59
This Kiwi.com deal was found by Cheapflights users on 3/10. 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.
Mon 6/86:25 am
SAN
- DEN
Nonstop2h 44m
Frontier
Deal found 3/10![Frontier logo]()
$62
This Super.com deal was found by Cheapflights users on 3/7. 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.
Wed 3/188:25 am
SAN
- DEN
Nonstop2h 34m
Frontier
Deal found 3/7![Frontier logo]()
$63
This Kiwi.com deal was found by Cheapflights users on 3/9. 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 4/292:12 pm
SAN
- DEN
1 stop9h 07m
Frontier
Deal found 3/9![Frontier logo]()
$65
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 March 12, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $60 (Trip.com) |
One-way from | $52 (Kiwi.com) |
Popular in | June |
Cheapest in | February |
Average price | $197 |
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 March 12, 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
Quickest round-trip
San DiegoDenver
SAN - DEN
SANDEN
San Diego
Thu 4/30
6:55 pm-12:25 am
1 stop4h 30m
Denver Intl
Sun 5/3
6:00 am-7:25 am
Nonstop2h 25m
$127
San DiegoDenver
SAN - DEN
SANDEN
San Diego
Wed 4/8
6:30 am-12:20 pm
1 stop4h 50m
Denver Intl
Tue 4/14
8:55 am-12:40 pm
1 stop4h 45m
$132
San DiegoDenver
SAN - DEN
SANDEN
San Diego
Fri 4/17
5:55 pm-10:55 pm
1 stop4h 00m
Denver Intl
Mon 4/20
5:10 pm-7:55 pm
1 stop3h 45m
$132
San DiegoDenver
SAN - DEN
SANDEN
San Diego
Wed 4/8
8:40 am-3:05 pm
2 stops5h 25m
Denver Intl
Wed 4/8
4:25 pm-7:25 pm
1 stop4h 00m
$217
San DiegoDenver
SAN - DEN
SANDEN
San Diego
Wed 4/22
8:40 am-3:05 pm
2 stops5h 25m
Denver Intl
Fri 4/24
8:10 pm-11:05 pm
1 stop3h 55m
$257
San DiegoDenver
SAN - DEN
SANDEN
San Diego
Tue 5/5
10:55 am-5:52 pm
1 stop5h 57m
Denver Intl
Wed 5/6
3:44 pm-8:03 pm
1 stop5h 19m
$267
San DiegoDenver
SAN - DEN
SANDEN
San Diego
Wed 3/18
6:15 am-11:33 am
1 stop4h 18m
Denver Intl
Wed 3/25
6:15 pm-11:48 pm
1 stop6h 33m
$368
San DiegoDenver
SAN - DEN
SANDEN
San Diego
Fri 3/20
6:30 am-9:58 am
Nonstop2h 28m
Denver Intl
Sun 3/22
8:00 pm-11:40 pm
1 stop4h 40m
$668
San DiegoDenver
SAN - DEN
SANDEN
San Diego
Tue 4/7
6:20 am-3:07 pm
2 stops7h 47m
Denver Intl
Sat 4/11
6:30 am-9:55 am
1 stop4h 25m
$780
San DiegoDenver
SAN - DEN
SANDEN
San Diego
Fri 4/3
10:40 am-7:57 pm
2 stops8h 17m
Denver Intl
Mon 4/6
6:15 pm-11:48 pm
1 stop6h 33m
$981
Showing 1-10 of 21 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
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 March 6, 2026.
Booking 39 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, January is the cheapest month in which you can book a flight from San Diego to Fort Collins (average of $38). Flying from San Diego to Fort Collins in June is currently the most expensive (average of $85). 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 March 12, 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 32% versus a flight in the afternoon.
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 March 12, 2026.
Travelers seeking maximum savings on their San Diego to Fort Collins flight should consider departing on Friday evenings when fares are most often at their lowest. Sunday 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 March 12, 2026.
The most flights from SAN to FC9 are scheduled on a Thursday (33 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (18 on average).
How much does it cost to fly round-trip from San Diego to Fort Collins?
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 March 12, 2026.
Read through reviews of airlines operating flights from San Diego to Fort Collins, such as Alaska Airlines,Southwest, andHawaiian Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Overall
8.0
Food
7.1
Comfort
7.8
Boarding
8.1
Entertainment
7.0
Crew
8.5
Reviews
1 / 20
10.0
ExcellentFranzi,Mar 2026
SFO - PDX
Overall
8.0
Food
7.1
Comfort
7.8
Boarding
8.1
Entertainment
7.0
Crew
8.5
Reviews
1 / 20
10.0
ExcellentFranzi,Mar 2026
SFO - PDX
Overall
8.0
Food
7.1
Comfort
7.8
Boarding
8.1
Entertainment
7.0
Crew
8.5
Reviews
1 / 20
10.0
ExcellentFranzi,Mar 2026
SFO - PDX
Overall
8.0
Food
7.1
Comfort
7.8
Boarding
8.1
Entertainment
7.0
Crew
8.5
Reviews
1 / 20
10.0
ExcellentFranzi,Mar 2026
SFO - PDX
Overall
8.0
Food
7.1
Comfort
7.8
Boarding
8.1
Entertainment
7.0
Crew
8.5
Reviews
1 / 20
10.0
ExcellentFranzi,Mar 2026
SFO - PDX
Overall
8.0
Food
7.1
Comfort
7.8
Boarding
8.1
Entertainment
7.0
Crew
8.5
Reviews
1 / 20
10.0
ExcellentFranzi,Mar 2026
SFO - PDX
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.
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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 March 12, 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 March 12, 2026.
Popular flight searches
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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 March 12, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$54 | Average$155 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$68 | Average$177 | FlexibilityNo cancel fee | On-time85% | |
| Cheapest$106 | Average$195 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$117 | Average$251 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$121 | Average$324 | FlexibilityNo cancel fee | On-time69% |