$152+ Cheap flights from Ontario to Colorado
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 9/16. Fares are subject to change and may not be available on all flights or dates of travel.
YYZ — DEN
Aug 30 — Sep 61
Round-trip
1 adult, Economy
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Find cheap flights from Ontario to Colorado with Cheapflights
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Cheapest flights from Ontario to ColoradoExplore the most affordable flight options available from Ontario to Colorado. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 31, 2026.
Explore the most affordable flight options available from Ontario to Colorado. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 31, 2026.
This United Airlines deal was found by Cheapflights users on 7/30. 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 9/46:30 pm
YUL
- DEN
1 stop29h 14m
United Airlines
Sun 9/69:40 am
DEN
- YUL
Nonstop3h 48m
United Airlines
Deal found 7/30![United Airlines logo]()
$358
This Kiwi.com deal was found by Cheapflights users on 7/28. 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 8/2512:55 pm
YYZ
- DEN
1 stop20h 39m
Multiple Airlines
Thu 9/38:31 am
DEN
- YYZ
1 stop11h 24m
Multiple Airlines
Deal found 7/28![Multiple Airlines logo]()
$385
This oojo deal was found by Cheapflights users on 7/27. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/56:10 pm
YHM
- DEN
1 stop19h 10m
WestJet
Mon 9/712:15 pm
DEN
- YHM
1 stop27h 00m
WestJet
Deal found 7/27![WestJet logo]()
$386
This Mytrip deal was found by Cheapflights users on 7/29. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/2612:00 pm
YYZ
- DEN
1 stop25h 20m
WestJet
Wed 9/212:15 pm
DEN
- YYZ
1 stop9h 55m
WestJet
Deal found 7/29![WestJet logo]()
$386
This Kiwi.com deal was found by Cheapflights users on 7/29. 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 9/1210:50 am
YTZ
- DEN
1 stop8h 26m
Multiple Airlines
Sat 9/266:38 pm
DEN
- YTZ
2 stops16h 17m
Multiple Airlines
Deal found 7/29![Multiple Airlines logo]()
$387
This Kiwi.com deal was found by Cheapflights users on 7/30. 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 8/259:30 am
YYZ
- DEN
1 stop9h 40m
Multiple Airlines
Tue 8/2511:59 pm
DEN
- YYZ
2 stops19h 41m
Multiple Airlines
Deal found 7/30![Multiple Airlines logo]()
$387
This Kiwi.com deal was found by Cheapflights users on 7/28. 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 9/51:45 pm
YTZ
- DEN
1 stop29h 00m
Multiple Airlines
Mon 9/145:56 pm
DEN
- YTZ
1 stop18h 29m
Multiple Airlines
Deal found 7/28![Multiple Airlines logo]()
$388
This Kiwi.com deal was found by Cheapflights users on 7/30. 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 8/266:00 am
YYZ
- DEN
2 stops13h 10m
Multiple Airlines
Wed 8/268:26 pm
DEN
- YYZ
1 stop22h 24m
Multiple Airlines
Deal found 7/30![Multiple Airlines logo]()
$388
This oojo deal was found by Cheapflights users on 7/28. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/188:00 am
YYZ
- DEN
1 stop29h 20m
WestJet
Mon 8/2412:15 pm
DEN
- YYZ
1 stop9h 55m
WestJet
Deal found 7/28![WestJet logo]()
$390
This oojo deal was found by Cheapflights users on 7/27. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/26:10 pm
YHM
- DEN
1 stop19h 10m
WestJet
Sun 9/612:15 pm
DEN
- YHM
1 stop27h 00m
WestJet
Deal found 7/27![WestJet logo]()
$392
This Kiwi.com deal was found by Cheapflights users on 7/27. 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 9/299:55 am
YYZ
- DEN
1 stop10h 38m
Multiple Airlines
Wed 9/3010:38 am
DEN
- YYZ
1 stop9h 17m
Multiple Airlines
Deal found 7/27![Multiple Airlines logo]()
$392
This Kiwi.com deal was found by Cheapflights users on 7/29. 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 8/208:55 am
YTZ
- DEN
1 stop9h 50m
Multiple Airlines
Wed 8/2610:43 am
DEN
- YTZ
2 stops24h 12m
Multiple Airlines
Deal found 7/29![Multiple Airlines logo]()
$393
Best flights from Ontario to ColoradoDiscover carefully curated flight deals from Ontario to Colorado that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated July 31, 2026.
Discover carefully curated flight deals from Ontario to Colorado that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated July 31, 2026.
This United Airlines deal was found by Cheapflights users on 7/30. 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 9/46:30 pm
YUL
- DEN
1 stop29h 14m
United Airlines
Sun 9/69:40 am
DEN
- YUL
Nonstop3h 48m
United Airlines
Deal found 7/30![United Airlines logo]()
$358
This Delta deal was found by Cheapflights users on 7/29. 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 9/127:00 am
YUL
- COS
1 stop7h 14m
Delta
Sat 9/1912:55 pm
COS
- YUL
1 stop8h 55m
Delta
Deal found 7/29![Delta logo]()
$406
This Kiwi.com deal was found by Cheapflights users on 7/29. 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 8/211:45 pm
YTZ
- DEN
1 stop29h 00m
Multiple Airlines
Fri 8/2811:59 pm
DEN
- YTZ
2 stops34h 56m
Multiple Airlines
Deal found 7/29![Multiple Airlines logo]()
$407
This WestJet deal was found by Cheapflights users on 7/28. 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 WestJet is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/188:40 pm
YKF
- DEN
1 stop16h 40m
WestJet
Wed 8/2612:15 pm
DEN
- YKF
1 stop29h 35m
WestJet
Deal found 7/28![WestJet logo]()
$434
This Air Canada deal was found by Cheapflights users on 7/26. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/18:45 am
YYZ
- DEN
Nonstop3h 37m
Air Canada
Sun 10/411:35 am
DEN
- YYZ
Nonstop3h 10m
Air Canada
Deal found 7/26![Air Canada logo]()
$466
This American Airlines deal was found by Cheapflights users on 7/30. 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 8/226:46 am
YYZ
- ASE
1 stop15h 30m
American Airlines
Sat 8/297:00 am
ASE
- YYZ
1 stop14h 29m
American Airlines
Deal found 7/30![American Airlines logo]()
$522
This Kiwi.com deal was found by Cheapflights users on 7/29. 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 8/278:55 am
YTZ
- DEN
1 stop9h 50m
Multiple Airlines
Fri 9/44:28 pm
DEN
- YTZ
1 stop22h 52m
Multiple Airlines
Deal found 7/29![Multiple Airlines logo]()
$419
This United Airlines deal was found by Cheapflights users on 7/29. 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 8/259:45 am
YUL
- COS
2 stops12h 09m
United Airlines
Wed 8/267:55 am
COS
- YUL
1 stop7h 35m
United Airlines
Deal found 7/29![United Airlines logo]()
$421
This Delta deal was found by Cheapflights users on 7/29. 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 8/266:10 am
YYZ
- COS
2 stops8h 05m
Delta
Wed 9/26:00 am
COS
- YYZ
1 stop9h 19m
Delta
Deal found 7/29![Delta logo]()
$433
This Air Canada deal was found by Cheapflights users on 7/26. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/316:40 pm
YYZ
- DEN
Nonstop3h 42m
Air Canada
Wed 9/26:05 pm
DEN
- YYZ
Nonstop3h 12m
Air Canada
Deal found 7/26![Air Canada logo]()
$466
This FlightHub deal was found by Cheapflights users on 7/28. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/46:10 pm
YHM
- DEN
1 stop19h 10m
WestJet
Sun 9/612:15 pm
DEN
- YHM
1 stop27h 00m
WestJet
Deal found 7/28![WestJet logo]()
$468
This Delta deal was found by Cheapflights users on 7/31. 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 10/109:40 am
YYZ
- DEN
1 stop9h 28m
Delta
Tue 10/136:10 am
DEN
- YYZ
1 stop9h 09m
Delta
Deal found 7/31![Delta logo]()
$439
This United Airlines deal was found by Cheapflights users on 7/28. 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 9/119:00 pm
YYZ
- COS
1 stop15h 47m
United Airlines
Fri 9/1811:30 am
COS
- YYZ
2 stops10h 24m
United Airlines
Deal found 7/28![United Airlines logo]()
$447
This United deal was found by Cheapflights users on 7/31. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/1211:00 am
YYZ
- DEN
1 stop5h 31m
Multiple Airlines
Thu 9/176:05 pm
DEN
- YYZ
Nonstop3h 11m
Multiple Airlines
Deal found 7/31![Multiple Airlines logo]()
$462
This Air Canada deal was found by Cheapflights users on 7/26. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/176:40 pm
YYZ
- DEN
Nonstop3h 37m
Air Canada
Sun 9/206:05 pm
DEN
- YYZ
Nonstop3h 11m
Air Canada
Deal found 7/26![Air Canada logo]()
$466
This United Airlines deal was found by Cheapflights users on 7/27. 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 8/258:50 am
YYZ
- COS
2 stops14h 37m
United Airlines
Fri 8/2811:55 am
COS
- YYZ
1 stop6h 49m
United Airlines
Deal found 7/27![United Airlines logo]()
$456
This Delta deal was found by Cheapflights users on 7/28. 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 12/46:30 am
YYZ
- DEN
1 stop7h 41m
Delta
Tue 12/811:05 am
DEN
- YYZ
1 stop10h 06m
Delta
Deal found 7/28![Delta logo]()
$460
This FlightHub deal was found by Cheapflights users on 7/31. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/128:40 pm
YKF
- DEN
1 stop16h 40m
WestJet
Thu 9/1712:15 pm
DEN
- YKF
1 stop29h 35m
WestJet
Deal found 7/31![WestJet logo]()
$507
This United deal was found by Cheapflights users on 7/30. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/93:53 pm
YYZ
- DEN
1 stop16h 54m
Multiple Airlines
Mon 10/1211:25 am
DEN
- YYZ
1 stop8h 28m
Multiple Airlines
Deal found 7/30![Multiple Airlines logo]()
$463
This Air Canada deal was found by Cheapflights users on 7/26. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/1712:30 pm
YTZ
- DEN
1 stop8h 16m
Air Canada
Sun 9/209:40 am
DEN
- YTZ
1 stop8h 10m
Air Canada
Deal found 7/26![Air Canada logo]()
$476
This Delta deal was found by Cheapflights users on 7/29. 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 8/212:24 pm
YYZ
- DEN
1 stop10h 24m
Delta
Fri 8/286:05 am
DEN
- YYZ
1 stop7h 15m
Delta
Deal found 7/29![Delta logo]()
$460
This United Airlines deal was found by Cheapflights users on 7/29. 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.
Wed 8/267:00 am
YYZ
- COS
1 stop5h 33m
United Airlines
Sun 8/307:55 am
COS
- YYZ
1 stop5h 51m
United Airlines
Deal found 7/29![United Airlines logo]()
$461
This Flightnetwork deal was found by Cheapflights users on 7/31. 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 Flightnetwork is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/46:10 pm
YHM
- DEN
1 stop19h 10m
WestJet
Mon 9/712:15 pm
DEN
- YHM
1 stop27h 00m
WestJet
Deal found 7/31![WestJet logo]()
$519
This United deal was found by Cheapflights users on 7/30. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/84:10 pm
YYZ
- DEN
Nonstop3h 54m
Multiple Airlines
Tue 11/1711:20 am
DEN
- YYZ
1 stop7h 30m
Multiple Airlines
Deal found 7/30![Multiple Airlines logo]()
$476
This Air Canada deal was found by Cheapflights users on 7/28. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/1012:30 pm
YTZ
- DEN
1 stop8h 16m
Air Canada
Tue 10/1311:25 am
DEN
- YTZ
1 stop8h 05m
Air Canada
Deal found 7/28![Air Canada logo]()
$495
This Delta deal was found by Cheapflights users on 7/28. 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 8/256:10 am
YYZ
- DEN
1 stop5h 42m
Delta
Wed 8/2611:40 am
DEN
- YYZ
1 stop7h 39m
Delta
Deal found 7/28![Delta logo]()
$460
This United Airlines deal was found by Cheapflights users on 7/26. 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.
Thu 9/244:18 pm
YYZ
- COS
1 stop9h 41m
United Airlines
Sun 9/275:30 am
COS
- YYZ
1 stop7h 44m
United Airlines
Deal found 7/26![United Airlines logo]()
$476
This Mytrip deal was found by Cheapflights users on 7/31. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/148:40 pm
YKF
- DEN
2 stops22h 18m
Multiple Airlines
Mon 9/217:50 pm
DEN
- YKF
2 stops17h 10m
Multiple Airlines
Deal found 7/31![Multiple Airlines logo]()
$483
This Mytrip deal was found by Cheapflights users on 7/27. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/246:55 am
YOW
- DEN
2 stops30h 25m
WestJet
Mon 8/3112:15 pm
DEN
- YOW
2 stops21h 20m
WestJet
Deal found 7/27![WestJet logo]()
$540
This Air Canada deal was found by Cheapflights users on 7/27. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/1212:30 pm
YTZ
- DEN
1 stop8h 16m
Air Canada
Thu 10/1511:25 am
DEN
- YTZ
1 stop6h 25m
Air Canada
Deal found 7/27![Air Canada logo]()
$496
Last-minute flights from Ontario to ColoradoDiscover last-minute flight deals from Ontario to Colorado. Data last updated July 31, 2026 and is based on user searches.
Discover last-minute flight deals from Ontario to Colorado. Data last updated July 31, 2026 and is based on user searches.
This oojo deal was found by Cheapflights users on 7/28. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/188:00 am
YYZ
- DEN
1 stop29h 20m
WestJet
Mon 8/2412:15 pm
DEN
- YYZ
1 stop9h 55m
WestJet
Deal found 7/28![WestJet logo]()
$390
This oojo deal was found by Cheapflights users on 7/28. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/188:40 pm
YKF
- DEN
1 stop16h 40m
WestJet
Tue 8/2512:15 pm
DEN
- YKF
1 stop29h 35m
WestJet
Deal found 7/28![WestJet logo]()
$396
This oojo deal was found by Cheapflights users on 7/27. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/196:10 pm
YHM
- DEN
1 stop19h 10m
WestJet
Mon 8/2412:15 pm
DEN
- YHM
1 stop27h 00m
WestJet
Deal found 7/27![WestJet logo]()
$396
This FlightHub deal was found by Cheapflights users on 7/29. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/1910:20 pm
YYZ
- DEN
2 stops15h 00m
WestJet
Wed 8/2612:15 pm
DEN
- YYZ
1 stop9h 55m
WestJet
Deal found 7/29![WestJet logo]()
$396
This Kiwi.com deal was found by Cheapflights users on 7/29. 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 8/208:55 am
YTZ
- DEN
1 stop9h 50m
Multiple Airlines
Wed 8/2610:43 am
DEN
- YTZ
2 stops24h 12m
Multiple Airlines
Deal found 7/29![Multiple Airlines logo]()
$393
This Kiwi.com deal was found by Cheapflights users on 7/29. 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 8/2012:55 pm
YYZ
- DEN
1 stop10h 49m
Multiple Airlines
Wed 8/264:14 pm
DEN
- YYZ
1 stop26h 36m
Multiple Airlines
Deal found 7/29![Multiple Airlines logo]()
$394
This Kiwi.com deal was found by Cheapflights users on 7/27. 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 8/208:55 am
YTZ
- DEN
1 stop9h 50m
Multiple Airlines
Sat 8/299:55 am
DEN
- YTZ
1 stop25h 05m
Multiple Airlines
Deal found 7/27![Multiple Airlines logo]()
$396
This Kiwi.com deal was found by Cheapflights users on 7/28. 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 8/2512:55 pm
YYZ
- DEN
1 stop20h 39m
Multiple Airlines
Thu 9/38:31 am
DEN
- YYZ
1 stop11h 24m
Multiple Airlines
Deal found 7/28![Multiple Airlines logo]()
$385
This Kiwi.com deal was found by Cheapflights users on 7/30. 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 8/259:30 am
YYZ
- DEN
1 stop9h 40m
Multiple Airlines
Tue 8/2511:59 pm
DEN
- YYZ
2 stops19h 41m
Multiple Airlines
Deal found 7/30![Multiple Airlines logo]()
$387
This Mytrip deal was found by Cheapflights users on 7/29. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/2612:00 pm
YYZ
- DEN
1 stop25h 20m
WestJet
Wed 9/212:15 pm
DEN
- YYZ
1 stop9h 55m
WestJet
Deal found 7/29![WestJet logo]()
$386
This Kiwi.com deal was found by Cheapflights users on 7/30. 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 8/266:00 am
YYZ
- DEN
2 stops13h 10m
Multiple Airlines
Wed 8/268:26 pm
DEN
- YYZ
1 stop22h 24m
Multiple Airlines
Deal found 7/30![Multiple Airlines logo]()
$388
This Kiwi.com deal was found by Cheapflights users on 7/29. 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 8/2712:55 pm
YYZ
- DEN
1 stop10h 49m
Multiple Airlines
Thu 9/38:31 am
DEN
- YYZ
1 stop11h 24m
Multiple Airlines
Deal found 7/29![Multiple Airlines logo]()
$392
One-way flights from Ontario to ColoradoSearch for one-way flight options from Ontario to Colorado. Find affordable one-way fares based on user searches. Data last updated July 31, 2026.
Search for one-way flight options from Ontario to Colorado. Find affordable one-way fares based on user searches. Data last updated July 31, 2026.
This Kiwi.com deal was found by Cheapflights users on 7/26. 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 9/1610:50 am
YTZ
- DEN
1 stop8h 26m
Multiple Airlines
Deal found 7/26![Multiple Airlines logo]()
$152
This Kiwi.com deal was found by Cheapflights users on 7/26. 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 8/1710:50 am
YTZ
- DEN
1 stop30h 11m
Multiple Airlines
Deal found 7/26![Multiple Airlines logo]()
$157
This Kiwi.com deal was found by Cheapflights users on 7/27. 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 8/1610:50 am
YTZ
- DEN
1 stop29h 41m
Multiple Airlines
Deal found 7/27![Multiple Airlines logo]()
$158
This Kiwi.com deal was found by Cheapflights users on 7/28. 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 9/1410:50 am
YTZ
- DEN
1 stop8h 26m
Multiple Airlines
Deal found 7/28![Multiple Airlines logo]()
$161
This Trip.com deal was found by Cheapflights users on 7/26. 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.
Mon 9/74:45 pm
YYZ
- DEN
1 stop24h 16m
Multiple Airlines
Deal found 7/26![Multiple Airlines logo]()
$163
This Kiwi.com deal was found by Cheapflights users on 7/28. 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 9/1210:50 am
YTZ
- DEN
1 stop8h 26m
Multiple Airlines
Deal found 7/28![Multiple Airlines logo]()
$164
This Kiwi.com deal was found by Cheapflights users on 7/27. 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 8/314:45 pm
YYZ
- DEN
1 stop24h 16m
Multiple Airlines
Deal found 7/27![Multiple Airlines logo]()
$164
This Kiwi.com deal was found by Cheapflights users on 7/28. 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 9/2310:50 am
YTZ
- DEN
1 stop8h 26m
Multiple Airlines
Deal found 7/28![Multiple Airlines logo]()
$165
This Kiwi.com deal was found by Cheapflights users on 7/26. 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 8/174:45 pm
YYZ
- DEN
1 stop24h 16m
Multiple Airlines
Deal found 7/26![Multiple Airlines logo]()
$165
This Kiwi.com deal was found by Cheapflights users on 7/27. 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 9/234:45 pm
YYZ
- DEN
1 stop26h 31m
Multiple Airlines
Deal found 7/27![Multiple Airlines logo]()
$166
This Trip.com deal was found by Cheapflights users on 7/26. 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.
Tue 9/158:30 am
YYZ
- DEN
1 stop10h 46m
Multiple Airlines
Deal found 7/26![Multiple Airlines logo]()
$174
This Mytrip deal was found by Cheapflights users on 7/27. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/1210:00 am
YYZ
- DEN
1 stop27h 20m
WestJet
Deal found 7/27![WestJet logo]()
$177
Find flight deals from Ontario to Colorado
Keep the following information in mind while searching for Ontario to Colorado flight deals. Data was last updated July 31, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $358 (United Airlines) |
One-way from | $152 (Kiwi.com) |
Popular in | February |
Cheapest in | November |
Average price | $495 |
Good round-trip deal | $476 or less |
Good one-way deal | $318 or less |
Cheapflights Fare Finder
Customize your flight search to find flights from Ontario to Colorado 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 31, 2026.
Use the filters below to find and compare flights from Ontario to Colorado that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
MontrealDenver
YUL - DEN
YULDEN
Montreal Pierre Elliott Trudeau Intl
Fri 9/4
6:30 pm-9:44 pm
1 stop29h 14m
Denver Intl
Sun 9/6
9:40 am-3:28 pm
Nonstop3h 48m
$358
MontrealColorado Springs
YUL - COS
YULCOS
Montreal Pierre Elliott Trudeau Intl
Sat 9/12
7:00 am-12:14 pm
1 stop7h 14m
Colorado Springs
Sat 9/19
12:55 pm-11:50 pm
1 stop8h 55m
$406
TorontoDenver
YTZ - DEN
YTZDEN
Toronto Island
Fri 8/21
1:45 pm-4:45 pm
1 stop29h 00m
Denver Intl
Fri 8/28
11:59 pm-12:55 pm
2 stops34h 56m
$407
TorontoDenver
YTZ - DEN
YTZDEN
Toronto Island
Thu 8/27
8:55 am-4:45 pm
1 stop9h 50m
Denver Intl
Fri 9/4
4:28 pm-5:20 pm
1 stop22h 52m
$419
MontrealColorado Springs
YUL - COS
YULCOS
Montreal Pierre Elliott Trudeau Intl
Tue 8/25
9:45 am-7:54 pm
2 stops12h 09m
Colorado Springs
Wed 8/26
7:55 am-5:30 pm
1 stop7h 35m
$421
TorontoColorado Springs
YYZ - COS
YYZCOS
Toronto Pearson Intl
Wed 8/26
6:10 am-12:15 pm
2 stops8h 05m
Colorado Springs
Wed 9/2
6:00 am-5:19 pm
1 stop9h 19m
$433
TorontoDenver
YKF - DEN
YKFDEN
Toronto Region of Waterloo Intl
Tue 8/18
8:40 pm-11:20 am
1 stop16h 40m
Denver Intl
Wed 8/26
12:15 pm-7:50 pm
1 stop29h 35m
$434
TorontoDenver
YYZ - DEN
YYZDEN
Toronto Pearson Intl
Sat 10/10
9:40 am-5:08 pm
1 stop9h 28m
Denver Intl
Tue 10/13
6:10 am-5:19 pm
1 stop9h 09m
$439
TorontoColorado Springs
YYZ - COS
YYZCOS
Toronto Pearson Intl
Fri 9/11
9:00 pm-10:47 am
1 stop15h 47m
Colorado Springs
Fri 9/18
11:30 am-11:54 pm
2 stops10h 24m
$447
TorontoColorado Springs
YYZ - COS
YYZCOS
Toronto Pearson Intl
Tue 8/25
8:50 am-9:27 pm
2 stops14h 37m
Colorado Springs
Fri 8/28
11:55 am-8:44 pm
1 stop6h 49m
$456
Showing 1-10 of 60 resultsSorted by cheapest first
Best time to book a flight from Ontario to Colorado
Have a flexible travel schedule? Discover the best time to fly to Colorado from Ontario with our price prediction graph.
YYZ-DEN
YTZ-DEN
YKF-DEN
YHM-DEN
YUL-COS
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 Ontario to Colorado
CAON-USCO
YYZ-DEN
YTZ-DEN
YKF-DEN
YHM-DEN
What is the cheapest month to book a flight from Region of Ontario to Colorado?
Currently, September is the cheapest month in which you can book a flight from Region of Ontario to Colorado (average of $423). Flying from Region of Ontario to Colorado in January is currently the most expensive (average of $662). 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 ON to CO?
Find hourly flight availability from Ontario to Colorado. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated July 31, 2026.
When flying from Region of Ontario to Colorado, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.
Weekly flight availability from Region of Ontario to Colorado
Explore weekly flight availability from Ontario to Colorado. 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 31, 2026.
The most flights from CAON to USCO are scheduled on a Monday (10 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (7 on average).
How much does it cost to fly round-trip from Region of Ontario to Colorado?
Airfare is below average for this route at the moment.
Region of Ontario to Colorado flights typically cost between $415 and $565 in August.The cheapest round-trip price found within the last 5 days was $385 on Multiple Airlines (Aug 25-Sep 3).
How far ahead should I book a flight from Region of Ontario to Colorado?
To ensure you get the cheapest price possible for a flight from Region of Ontario to Colorado, you should look to book at least 45 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.
Reviews of airlines servicing Colorado
Get insights into the airlines that provide service to Colorado. 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 Colorado. Reviews last updated July 31, 2026.
Peruse reviews from past customers who have flown with United Airlines and Air Canada from Ontario to Colorado to help guide your decision. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Food
6.7
Boarding
7.7
Comfort
7.3
Crew
8.1
Entertainment
7.1
Overall
7.4
Reviews
1 / 20
6.0
GoodGerry,Jan 2026
YVR - DEN
Food
6.7
Boarding
7.7
Comfort
7.3
Crew
8.1
Entertainment
7.1
Overall
7.4
Reviews
1 / 20
6.0
GoodGerry,Jan 2026
YVR - DEN
Food
6.7
Boarding
7.7
Comfort
7.3
Crew
8.1
Entertainment
7.1
Overall
7.4
Reviews
1 / 20
6.0
GoodGerry,Jan 2026
YVR - DEN
Related info for your journey
Find useful and relevant information for your journey from Ontario to Colorado. 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 Ontario to Colorado
See prices for flight routes from nearby airports that may be better suited for you.
Complete your trip
Complete your trip to Colorado by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from Ontario to Colorado by cabin class
Find flights from Ontario to Colorado, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Ontario and Colorado flights
Browse other Ontario and Colorado flight options. Last updated on July 31, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Find a return flight route from Colorado
Find the right flight back to Ontario after your stay in Colorado
Ontario to Colorado flights
Consider these flights traveling from Ontario to Colorado.
Top 2 airlines flying from Ontario to Colorado
Discover the top 2 airlines that operate flights from Ontario to Colorado. 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 31, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$251 | Average$580 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$314 | Average$581 | FlexibilityNo cancel fee | On-time67% |