$169+ Cheap flights from Ontario to Colorado
This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 11/9. Fares are subject to change and may not be available on all flights or dates of travel.
YYZ — DEN
Oct 15 — Oct 221
Round-trip
1 adult, Economy
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Find cheap flights from Ontario to Colorado 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.Cheap flight deals from Ontario to Colorado
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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 September 15, 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 September 15, 2026.
This Kiwi.com deal was found by Cheapflights users on 9/10. 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.
Sat 10/178:00 pm -
1 stop17h 20m
Tue 10/201:07 pm -
2 stops15h 58m
Deal found 9/10![Multiple Airlines logo]()
$375
This Kiwi.com deal was found by Cheapflights users on 9/10. 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.
Sat 10/178:00 pm -
1 stop17h 20m
Thu 10/221:07 pm -
2 stops15h 58m
Deal found 9/10![Multiple Airlines logo]()
$377
This American Airlines deal was found by Cheapflights users on 9/14. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/711:40 am -
1 stop13h 12m
Tue 10/136:09 pm -
1 stop14h 50m
Deal found 9/14![American Airlines logo]()
$398
This Kiwi.com deal was found by Cheapflights users on 9/14. 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.
Thu 10/2911:30 am -
1 stop8h 40m
Thu 11/56:42 pm -
1 stop10h 08m
Deal found 9/14![Multiple Airlines logo]()
$400
This American Airlines deal was found by Cheapflights users on 9/14. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/217:29 am -
1 stop11h 50m
Tue 10/276:46 am -
1 stop8h 58m
Deal found 9/14![American Airlines logo]()
$403
This Kiwi.com deal was found by Cheapflights users on 9/10. 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.
Sat 10/178:00 pm -
1 stop17h 20m
Wed 10/2110:44 pm -
2 stops23h 01m
Deal found 9/10![Multiple Airlines logo]()
$406
This SmartFares deal was found by Cheapflights users on 9/15. 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 SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/88:50 am -
Nonstop3h 37m
Sun 10/1111:35 am -
Nonstop3h 10m
Deal found 9/15![Air Canada logo]()
$406
This Kiwi.com deal was found by Cheapflights users on 9/15. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/14:35 pm -
1 stop17h 51m
Sun 11/88:55 pm -
1 stop16h 11m
Deal found 9/15![Multiple Airlines logo]()
$407
This Kiwi.com deal was found by Cheapflights users on 9/11. 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.
Thu 10/2212:40 pm -
2 stops13h 03m
Sun 11/110:39 am -
1 stop29h 31m
Deal found 9/11![Multiple Airlines logo]()
$408
This Delta deal was found by Cheapflights users on 9/14. 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.
Fri 10/26:55 am -
2 stops9h 02m
Tue 10/610:41 am -
2 stops11h 39m
Deal found 9/14![Delta logo]()
$409
This Kiwi.com deal was found by Cheapflights users on 9/14. 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.
Mon 10/1210:50 am -
2 stops27h 58m
Mon 10/1910:38 am -
1 stop9h 17m
Deal found 9/14![Multiple Airlines logo]()
$409
This Kiwi.com deal was found by Cheapflights users on 9/11. 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 10/1810:10 am -
1 stop24h 09m
Thu 10/2210:40 am -
2 stops27h 20m
Deal found 9/11![Multiple Airlines logo]()
$410
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 September 15, 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 September 15, 2026.
This Delta deal was found by Cheapflights users on 9/14. 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.
Fri 10/26:55 am -
2 stops9h 02m
Tue 10/610:41 am -
2 stops11h 39m
Deal found 9/14![Delta logo]()
$409
This Kiwi.com deal was found by Cheapflights users on 9/11. 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 10/1810:10 am -
1 stop24h 09m
Thu 10/2210:40 am -
2 stops27h 20m
Deal found 9/11![Multiple Airlines logo]()
$410
This Air Canada deal was found by Cheapflights users on 9/11. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/410:45 am -
1 stop11h 42m
Tue 12/811:25 am -
1 stop6h 31m
Deal found 9/11![Air Canada logo]()
$475
This United Airlines deal was found by Cheapflights users on 9/14. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/206:10 am -
1 stop6h 45m
Wed 10/215:30 am -
2 stops8h 40m
Deal found 9/14![United Airlines logo]()
$507
This lastminute.com deal was found by Cheapflights users on 9/14. 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 lastminute.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/308:40 pm -
1 stop16h 40m
Sun 10/412:15 pm -
1 stop29h 35m
Deal found 9/14![WestJet logo]()
$514
This Kiwi.com deal was found by Cheapflights users on 9/14. 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.
Fri 10/304:35 pm -
1 stop17h 51m
Fri 11/69:10 pm -
2 stops21h 56m
Deal found 9/14![Multiple Airlines logo]()
$428
This Delta deal was found by Cheapflights users on 9/14. 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 9/302:30 pm -
1 stop8h 05m
Wed 10/146:05 am -
1 stop10h 24m
Deal found 9/14![Delta logo]()
$441
This Air Canada deal was found by Cheapflights users on 9/10. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/110:45 am -
1 stop10h 01m
Sun 10/411:25 am -
1 stop8h 05m
Deal found 9/10![Air Canada logo]()
$490
This Delta deal was found by Cheapflights users on 9/14. 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 9/305:54 pm -
1 stop6h 46m
Sun 10/1112:59 am -
1 stop7h 24m
Deal found 9/14![Delta logo]()
$452
This Kiwi.com deal was found by Cheapflights users on 9/14. 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.
Sat 10/104:15 pm -
1 stop21h 05m
Tue 10/1310:45 pm -
2 stops23h 40m
Deal found 9/14![Multiple Airlines logo]()
$454
This United Airlines deal was found by Cheapflights users on 9/14. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/810:53 am -
2 stops7h 31m
Wed 12/91:40 pm -
2 stops8h 19m
Deal found 9/14![United Airlines logo]()
$509
This oojo deal was found by Cheapflights users on 9/10. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/76:45 am -
2 stops30h 35m
Thu 10/1512:15 pm -
2 stops28h 05m
Deal found 9/10![WestJet logo]()
$530
This Delta deal was found by Cheapflights users on 9/12. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/46:00 am -
1 stop5h 45m
Tue 12/811:13 am -
1 stop10h 13m
Deal found 9/12![Delta logo]()
$453
This Kiwi.com deal was found by Cheapflights users on 9/10. 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.
Tue 10/610:50 am -
1 stop8h 26m
Fri 10/98:10 am -
1 stop5h 50m
Deal found 9/10![Multiple Airlines logo]()
$460
This United Airlines deal was found by Cheapflights users on 9/11. 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 9/2910:45 am -
1 stop8h 36m
Wed 10/71:34 pm -
1 stop5h 58m
Deal found 9/11![United Airlines logo]()
$512
This Air Canada deal was found by Cheapflights users on 9/12. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/88:40 am -
1 stop14h 22m
Thu 12/107:00 am -
1 stop6h 02m
Deal found 9/12![Air Canada logo]()
$519
This FlightHub deal was found by Cheapflights users on 9/11. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/308:40 pm -
1 stop16h 40m
Fri 10/212:15 pm -
1 stop29h 35m
Deal found 9/11![WestJet logo]()
$531
This Delta deal was found by Cheapflights users on 9/12. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/109:40 am -
1 stop9h 52m
Mon 10/1212:59 am -
1 stop7h 24m
Deal found 9/12![Delta logo]()
$453
This Mytrip deal was found by Cheapflights users on 9/15. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/236:15 pm -
3 stops24h 43m
Fri 10/307:00 pm -
2 stops28h 00m
Deal found 9/15![Multiple Airlines logo]()
$465
This United Airlines deal was found by Cheapflights users on 9/14. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/86:10 am -
2 stops16h 52m
Thu 12/107:00 am -
1 stop6h 02m
Deal found 9/14![United Airlines logo]()
$514
This Air Canada deal was found by Cheapflights users on 9/12. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/83:35 pm -
2 stops8h 28m
Wed 12/910:32 am -
2 stops8h 43m
Deal found 9/12![Air Canada logo]()
$519
This WestJet deal was found by Cheapflights users on 9/14. 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 WestJet is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/38:40 pm -
1 stop16h 40m
Sun 10/1112:15 pm -
1 stop29h 35m
Deal found 9/14![WestJet logo]()
$539
This Delta deal was found by Cheapflights users on 9/13. 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.
Sun 9/276:15 am -
1 stop10h 36m
Tue 10/610:41 am -
1 stop9h 18m
Deal found 9/13![Delta logo]()
$453
This Kiwi.com deal was found by Cheapflights users on 9/13. 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 10/131:45 pm -
2 stops34h 04m
Mon 10/198:10 am -
1 stop5h 50m
Deal found 9/13![Multiple Airlines logo]()
$466
This United Airlines deal was found by Cheapflights users on 9/12. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/305:15 pm -
1 stop6h 38m
Thu 10/11:29 pm -
1 stop6h 03m
Deal found 9/12![United Airlines logo]()
$520
This Air Canada deal was found by Cheapflights users on 9/10. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/2011:10 am -
2 stops11h 34m
Wed 10/2111:33 am -
2 stops10h 58m
Deal found 9/10![Air Canada logo]()
$535
This Justfly.com deal was found by Cheapflights users on 9/10. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/76:10 pm -
1 stop19h 10m
Thu 10/1512:15 pm -
1 stop27h 00m
Deal found 9/10![WestJet logo]()
$540
This Delta deal was found by Cheapflights users on 9/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/141:34 pm -
1 stop8h 37m
Sat 10/176:35 am -
1 stop9h 03m
Deal found 9/11![Delta logo]()
$453
This United Airlines deal was found by Cheapflights users on 9/10. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/175:45 pm -
2 stops16h 55m
Mon 10/191:29 pm -
1 stop6h 03m
Deal found 9/10![United Airlines logo]()
$525
This United deal was found by Cheapflights users on 9/14. 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 United is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/74:10 pm -
Nonstop3h 54m
Sun 11/85:40 pm -
Nonstop3h 11m
Deal found 9/14![Multiple Airlines logo]()
$484
Last-minute flights from Ontario to ColoradoDiscover last-minute flight deals from Ontario to Colorado. Data last updated September 15, 2026 and is based on user searches.
Discover last-minute flight deals from Ontario to Colorado. Data last updated September 15, 2026 and is based on user searches.
This Air Canada deal was found by Cheapflights users on 9/15. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/18:50 am -
Nonstop3h 37m
Sat 10/36:05 pm -
Nonstop3h 11m
Deal found 9/15![Air Canada logo]()
$398
This Air Canada deal was found by Cheapflights users on 9/15. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/16:40 pm -
Nonstop3h 37m
Sun 10/411:25 am -
1 stop6h 28m
Deal found 9/15![Air Canada logo]()
$402
This Delta deal was found by Cheapflights users on 9/14. 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.
Fri 10/26:55 am -
2 stops9h 02m
Tue 10/610:41 am -
2 stops11h 39m
Deal found 9/14![Delta logo]()
$409
This SmartFares deal was found by Cheapflights users on 9/15. 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 SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/88:50 am -
Nonstop3h 37m
Sun 10/1111:35 am -
Nonstop3h 10m
Deal found 9/15![Air Canada logo]()
$406
This Kiwi.com deal was found by Cheapflights users on 9/14. 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.
Mon 10/1210:50 am -
2 stops27h 58m
Mon 10/1910:38 am -
1 stop9h 17m
Deal found 9/14![Multiple Airlines logo]()
$409
This Kiwi.com deal was found by Cheapflights users on 9/10. 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.
Sat 10/178:00 pm -
1 stop17h 20m
Tue 10/201:07 pm -
2 stops15h 58m
Deal found 9/10![Multiple Airlines logo]()
$375
This Kiwi.com deal was found by Cheapflights users on 9/10. 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.
Sat 10/178:00 pm -
1 stop17h 20m
Thu 10/221:07 pm -
2 stops15h 58m
Deal found 9/10![Multiple Airlines logo]()
$377
This Kiwi.com deal was found by Cheapflights users on 9/10. 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.
Sat 10/178:00 pm -
1 stop17h 20m
Wed 10/2110:44 pm -
2 stops23h 01m
Deal found 9/10![Multiple Airlines logo]()
$406
This Kiwi.com deal was found by Cheapflights users on 9/11. 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 10/1810:10 am -
1 stop24h 09m
Thu 10/2210:40 am -
2 stops27h 20m
Deal found 9/11![Multiple Airlines logo]()
$410
This American Airlines deal was found by Cheapflights users on 9/14. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/217:29 am -
1 stop11h 50m
Tue 10/276:46 am -
1 stop8h 58m
Deal found 9/14![American Airlines logo]()
$403
This Kiwi.com deal was found by Cheapflights users on 9/11. 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.
Thu 10/2212:40 pm -
2 stops13h 03m
Sun 11/110:39 am -
1 stop29h 31m
Deal found 9/11![Multiple Airlines logo]()
$408
This Kiwi.com deal was found by Cheapflights users on 9/14. 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.
Thu 10/2911:30 am -
1 stop8h 40m
Thu 11/56:42 pm -
1 stop10h 08m
Deal found 9/14![Multiple Airlines logo]()
$400
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 September 15, 2026.
Search for one-way flight options from Ontario to Colorado. Find affordable one-way fares based on user searches. Data last updated September 15, 2026.
This Kiwi.com deal was found by Cheapflights users on 9/11. 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.
Mon 11/91:00 pm -
1 stop30h 22m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/11![Multiple Airlines logo]()
$169
This Kiwi.com deal was found by Cheapflights users on 9/10. 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.
Wed 9/304:45 pm -
1 stop26h 31m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/10![Multiple Airlines logo]()
$171
This Booking.com deal was found by Cheapflights users on 9/15. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/118:40 pm -
1 stop16h 40m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/15![WestJet logo]()
$175
This Kiwi.com deal was found by Cheapflights users on 9/10. 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.
Tue 10/271:10 pm -
1 stop30h 12m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/10![Multiple Airlines logo]()
$177
This Kiwi.com deal was found by Cheapflights users on 9/12. 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 11/309:15 am -
2 stops49h 11m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/12![Multiple Airlines logo]()
$189
This Kiwi.com deal was found by Cheapflights users on 9/12. 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.
Sat 10/174:15 pm -
1 stop21h 05m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/12![WestJet logo]()
$191
This Booking.com deal was found by Cheapflights users on 9/15. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/116:10 pm -
1 stop19h 10m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/15![WestJet logo]()
$191
This Kiwi.com deal was found by Cheapflights users on 9/10. 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.
Sat 10/104:15 pm -
1 stop21h 05m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/10![WestJet logo]()
$192
This Kiwi.com deal was found by Cheapflights users on 9/11. 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 10/271:40 pm -
1 stop10h 08m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/11![Multiple Airlines logo]()
$195
This Kiwi.com deal was found by Cheapflights users on 9/10. 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 11/121:10 pm -
1 stop30h 12m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/10![Multiple Airlines logo]()
$197
This Kiwi.com deal was found by Cheapflights users on 9/11. 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.
Thu 11/51:10 pm -
1 stop30h 12m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/11![Multiple Airlines logo]()
$198
This Booking.com deal was found by Cheapflights users on 9/15. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/1012:00 pm -
1 stop25h 20m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/15![WestJet logo]()
$198
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 September 15, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $375 (Kiwi.com) |
One-way from | $169 (Kiwi.com) |
Popular in | February |
Cheapest in | November |
Average price | $484 |
Good round-trip deal | $474 or less |
Good one-way deal | $286 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 7,457,451 searches. Data last updated September 15, 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
TorontoDenver
YYZ Toronto Pearson Intl - DEN Denver Intl
YYZDEN
Toronto Pearson Intl
Tue 10/27
7:15 am-8:22 am
2 stops27h 07m
Denver Intl
Wed 12/31
12:00 am-2:00 am
Nonstop0h 00m
$209
TorontoDenver
YTZ Toronto Island - DEN Denver Intl
YTZDEN
Toronto Island
Tue 10/27
1:10 pm-8:13 am
2 stops21h 03m
Denver Intl
Wed 12/31
12:00 am-2:00 am
Nonstop0h 00m
$220
OttawaDenver
YOW Ottawa - DEN Denver Intl
YOWDEN
Ottawa
Fri 10/2
12:25 pm-8:05 pm
2 stops9h 40m
Denver Intl
Wed 12/31
12:00 am-2:00 am
Nonstop0h 00m
$226
OttawaDenver
YOW Ottawa - DEN Denver Intl
YOWDEN
Ottawa
Fri 10/16
12:25 pm-11:44 pm
2 stops13h 19m
Denver Intl
Wed 12/31
12:00 am-2:00 am
Nonstop0h 00m
$227
TorontoDenver
YTZ Toronto Island - DEN Denver Intl
YTZDEN
Toronto Island
Tue 11/3
9:10 am-9:33 pm
3 stops38h 23m
Denver Intl
Wed 12/31
12:00 am-2:00 am
Nonstop0h 00m
$228
TorontoDenver
YTZ Toronto Island - DEN Denver Intl
YTZDEN
Toronto Island
Thu 10/29
4:35 pm-8:26 am
1 stop17h 51m
Denver Intl
Wed 12/31
12:00 am-2:00 am
Nonstop0h 00m
$236
MontrealDenver
YUL Montreal Pierre Elliott Trudeau Intl - DEN Denver Intl
YULDEN
Montreal Pierre Elliott Trudeau Intl
Tue 10/20
8:00 pm-9:31 pm
2 stops27h 31m
Denver Intl
Wed 12/31
12:00 am-2:00 am
Nonstop0h 00m
$238
Quickest round-trip
TorontoDenver
YYZ Toronto Pearson Intl - DEN Denver Intl
YYZDEN
Toronto Pearson Intl
Wed 10/7
6:40 pm-8:17 pm
Nonstop3h 37m
Denver Intl
Wed 12/31
12:00 am-2:00 am
Nonstop0h 00m
$239
OttawaDenver
YOW Ottawa - DEN Denver Intl
YOWDEN
Ottawa
Fri 9/25
6:55 am-7:05 pm
2 stops14h 10m
Denver Intl
Wed 12/31
12:00 am-2:00 am
Nonstop0h 00m
$239
TorontoDenver
YTZ Toronto Island - DEN Denver Intl
YTZDEN
Toronto Island
Mon 11/30
10:35 am-8:59 pm
2 stops36h 24m
Denver Intl
Wed 12/31
12:00 am-2:00 am
Nonstop0h 00m
$239
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
YOW-DEN
YTZ-DEN
YYZ-COS
YUL-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 Ontario to Colorado
CAON-USCO
YYZ-DEN
YOW-DEN
YTZ-DEN
YYZ-COS
What is the cheapest month to book a flight from Region of Ontario to Colorado?
Currently, October is the cheapest month in which you can book a flight from Region of Ontario to Colorado (average of $472). Flying from Region of Ontario to Colorado in January is currently the most expensive (average of $667). 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 September 15, 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 September 15, 2026.
The most flights from CAON to USCO are scheduled on a Monday (10 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (9 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 $440 and $579 in February.The cheapest round-trip price found within the last 5 days was $397 on Air Canada (Feb 8-Feb 17).
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 68 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 September 15, 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.
Crew
8.1
Comfort
7.3
Boarding
7.7
Food
6.7
Overall
7.4
Entertainment
7.1
Reviews
1 / 20
2.0
MediocreDawn,Aug 2026
ORD - DEN
Crew
8.1
Comfort
7.3
Boarding
7.7
Food
6.7
Overall
7.4
Entertainment
7.1
Reviews
1 / 20
2.0
MediocreDawn,Aug 2026
ORD - DEN
Crew
8.1
Comfort
7.3
Boarding
7.7
Food
6.7
Overall
7.4
Entertainment
7.1
Reviews
1 / 20
2.0
MediocreDawn,Aug 2026
ORD - 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 September 15, 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 7,457,451 searches. Data last updated September 15, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$251 | Average$583 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$337 | Average$600 | FlexibilityNo cancel fee | On-time67% |