$127+ Cheap flights from Colorado to Ontario
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 10/31. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — YYZ
Oct 15 — Oct 221
Round-trip
1 adult, Economy
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Find cheap flights from Colorado to Ontario 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
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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 Colorado to Ontario
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Cheapest flights from Colorado to OntarioExplore the most affordable flight options available from Colorado to Ontario. 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 Colorado to Ontario. 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 9/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/218:55 pm -
1 stop19h 05m
Sat 10/241:45 pm -
1 stop20h 34m
Deal found 9/11![Multiple Airlines logo]()
$307
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 10/198:10 am -
1 stop5h 50m
Sat 10/2410:50 am -
1 stop8h 31m
Deal found 9/11![Multiple Airlines logo]()
$312
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 12/104:00 pm -
1 stop29h 50m
Mon 12/142:25 pm -
1 stop10h 36m
Deal found 9/10![Multiple Airlines logo]()
$326
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.
Wed 10/148:55 pm -
1 stop15h 30m
Tue 10/201:45 pm -
1 stop20h 34m
Deal found 9/15![Multiple Airlines logo]()
$327
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.
Wed 10/148:55 pm -
1 stop15h 30m
Mon 10/191:45 pm -
1 stop20h 34m
Deal found 9/15![Multiple Airlines logo]()
$329
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 10/208:55 pm -
1 stop19h 05m
Sat 10/241:45 pm -
1 stop20h 34m
Deal found 9/11![Multiple Airlines logo]()
$331
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 10/198:10 am -
1 stop11h 45m
Thu 10/221:30 pm -
2 stops32h 47m
Deal found 9/11![Multiple Airlines logo]()
$339
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 10/178:55 pm -
1 stop15h 30m
Tue 10/201:45 pm -
1 stop20h 34m
Deal found 9/14![Multiple Airlines logo]()
$341
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.
Thu 10/158:55 pm -
1 stop15h 30m
Tue 10/201:45 pm -
1 stop20h 34m
Deal found 9/15![Multiple Airlines logo]()
$342
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.
Wed 10/148:55 pm -
1 stop15h 30m
Sun 10/1810:10 am -
1 stop24h 09m
Deal found 9/15![Multiple Airlines logo]()
$343
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 10/198:10 am -
1 stop5h 50m
Fri 10/231:45 pm -
1 stop20h 34m
Deal found 9/11![Multiple Airlines logo]()
$344
This Trip.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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/412:15 pm -
1 stop9h 55m
Sat 10/101:30 pm -
1 stop23h 50m
Deal found 9/13![WestJet logo]()
$349
Best flights from Colorado to OntarioDiscover carefully curated flight deals from Colorado to Ontario 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 Colorado to Ontario that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 15, 2026.
This Trip.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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/112:15 pm -
1 stop27h 00m
Sat 10/104:15 pm -
1 stop21h 05m
Deal found 9/14![WestJet logo]()
$376
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 10/158:55 pm -
1 stop19h 05m
Mon 10/191:40 pm -
2 stops20h 26m
Deal found 9/10![Multiple Airlines logo]()
$390
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.
Sat 12/58:00 am -
2 stops13h 46m
Tue 12/86:21 pm -
1 stop20h 43m
Deal found 9/14![American Airlines logo]()
$492
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 10/210:28 am -
2 stops11h 52m
Sun 10/116:55 am -
2 stops16h 56m
Deal found 9/12![Delta logo]()
$542
This Air Canada 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/1711:25 am -
1 stop8h 05m
Tue 10/2012:30 pm -
1 stop8h 16m
Deal found 9/14![Air Canada logo]()
$557
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 1/125:50 am -
1 stop8h 57m
Wed 1/134:00 pm -
1 stop7h 58m
Deal found 9/11![United Airlines logo]()
$643
This Alaska Airlines 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/307:53 am -
2 stops30h 12m
Fri 11/65:15 pm -
2 stops23h 12m
Deal found 9/15![Alaska Airlines logo]()
$649
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 9/246:45 am -
1 stop8h 35m
Wed 9/301:45 pm -
1 stop20h 30m
Deal found 9/10![Multiple Airlines logo]()
$468
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.
Tue 10/66:20 am -
2 stops9h 15m
Mon 10/126:50 am -
2 stops17h 01m
Deal found 9/12![Delta logo]()
$542
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 11/111:34 pm -
1 stop19h 16m
Fri 11/131:45 pm -
2 stops11h 16m
Deal found 9/14![American Airlines logo]()
$543
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.
Thu 9/246:40 am -
2 stops31h 20m
Thu 10/11:45 pm -
1 stop20h 30m
Deal found 9/13![Multiple Airlines logo]()
$511
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.
Tue 2/231:40 pm -
1 stop8h 11m
Tue 3/27:00 am -
1 stop7h 58m
Deal found 9/12![Delta logo]()
$553
This Booking.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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/412:15 pm -
2 stops31h 54m
Sat 10/106:05 am -
3 stops31h 15m
Deal found 9/14![Multiple Airlines logo]()
$522
This FlightHub 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/1212:15 pm -
2 stops27h 20m
Fri 10/166:50 am -
2 stops54h 30m
Deal found 9/10![WestJet logo]()
$637
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.
Fri 10/308:25 pm -
2 stops20h 32m
Fri 11/63:20 pm -
2 stops19h 25m
Deal found 9/14![United Airlines logo]()
$644
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 12/88:15 am -
1 stop9h 20m
Tue 12/155:50 pm -
Nonstop4h 37m
Deal found 9/10![Air Canada logo]()
$699
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 10/19:19 pm -
2 stops18h 01m
Sun 10/410:50 am -
1 stop8h 26m
Deal found 9/11![Multiple Airlines logo]()
$528
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/187:05 am -
1 stop9h 53m
Thu 11/267:10 am -
2 stops15h 20m
Deal found 9/10![Delta logo]()
$592
This United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/1510:02 am -
Nonstop3h 12m
Sun 10/1810:45 am -
Nonstop3h 38m
Deal found 9/13![United Airlines logo]()
$654
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 10/2312:59 am -
2 stops14h 36m
Sun 11/15:30 am -
2 stops11h 37m
Deal found 9/14![Delta logo]()
$594
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.
Thu 10/812:15 pm -
1 stop27h 00m
Sun 10/116:10 pm -
1 stop19h 10m
Deal found 9/14![WestJet logo]()
$719
This United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/229:44 am -
Nonstop3h 18m
Fri 1/14:10 pm -
Nonstop4h 03m
Deal found 9/13![United Airlines logo]()
$654
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.
Wed 10/2810:43 am -
2 stops28h 37m
Wed 11/48:00 am -
1 stop14h 00m
Deal found 9/13![Multiple Airlines logo]()
$543
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.
Mon 10/54:17 pm -
Nonstop3h 15m
Fri 10/910:45 am -
Nonstop3h 38m
Deal found 9/14![United Airlines logo]()
$654
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.
Sat 9/268:00 am -
1 stop8h 09m
Mon 9/281:34 pm -
1 stop9h 39m
Deal found 9/11![Delta logo]()
$596
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 10/56:45 am -
1 stop8h 35m
Fri 10/91:40 pm -
1 stop21h 24m
Deal found 9/14![Multiple Airlines logo]()
$587
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.
Fri 9/258:05 am -
1 stop6h 39m
Sun 9/275:54 pm -
1 stop6h 46m
Deal found 9/11![Delta logo]()
$596
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.
Fri 3/126:15 am -
1 stop5h 18m
Sat 3/204:00 pm -
Nonstop3h 46m
Deal found 9/12![United Airlines logo]()
$664
This Air Canada 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/2211:21 am -
2 stops19h 04m
Mon 10/269:15 am -
2 stops13h 12m
Deal found 9/14![Air Canada logo]()
$895
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.
Sun 9/2012:15 pm -
1 stop29h 35m
Wed 9/308:40 pm -
1 stop16h 40m
Deal found 9/11![WestJet logo]()
$835
Last-minute flights from Colorado to OntarioDiscover last-minute flight deals from Colorado to Ontario. Data last updated September 15, 2026 and is based on user searches.
Discover last-minute flight deals from Colorado to Ontario. Data last updated September 15, 2026 and is based on user searches.
This FlightHub 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/212:15 pm -
1 stop9h 55m
Wed 10/710:55 pm -
2 stops14h 25m
Deal found 9/15![WestJet logo]()
$351
This Trip.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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/412:15 pm -
1 stop9h 55m
Sat 10/101:30 pm -
1 stop23h 50m
Deal found 9/13![WestJet logo]()
$349
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.
Wed 10/148:55 pm -
1 stop15h 30m
Tue 10/201:45 pm -
1 stop20h 34m
Deal found 9/15![Multiple Airlines logo]()
$327
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.
Wed 10/148:55 pm -
1 stop15h 30m
Mon 10/191:45 pm -
1 stop20h 34m
Deal found 9/15![Multiple Airlines logo]()
$329
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.
Wed 10/148:55 pm -
1 stop15h 30m
Sun 10/1810:10 am -
1 stop24h 09m
Deal found 9/15![Multiple Airlines logo]()
$343
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.
Thu 10/158:55 pm -
1 stop15h 30m
Tue 10/201:45 pm -
1 stop20h 34m
Deal found 9/15![Multiple Airlines logo]()
$342
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 10/178:55 pm -
1 stop15h 30m
Tue 10/201:45 pm -
1 stop20h 34m
Deal found 9/14![Multiple Airlines logo]()
$341
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 10/198:10 am -
1 stop5h 50m
Sat 10/2410:50 am -
1 stop8h 31m
Deal found 9/11![Multiple Airlines logo]()
$312
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 10/198:10 am -
1 stop11h 45m
Thu 10/221:30 pm -
2 stops32h 47m
Deal found 9/11![Multiple Airlines logo]()
$339
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 10/198:10 am -
1 stop5h 50m
Fri 10/231:45 pm -
1 stop20h 34m
Deal found 9/11![Multiple Airlines logo]()
$344
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 10/208:55 pm -
1 stop19h 05m
Sat 10/241:45 pm -
1 stop20h 34m
Deal found 9/11![Multiple Airlines logo]()
$331
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.
Wed 10/218:55 pm -
1 stop19h 05m
Sat 10/241:45 pm -
1 stop20h 34m
Deal found 9/11![Multiple Airlines logo]()
$307
One-way flights from Colorado to OntarioSearch for one-way flight options from Colorado to Ontario. Find affordable one-way fares based on user searches. Data last updated September 15, 2026.
Search for one-way flight options from Colorado to Ontario. 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 9/10. 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 10/3110:39 am -
1 stop30h 36m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/10![Multiple Airlines logo]()
$127
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.
Sun 9/2712:15 pm -
1 stop8h 30m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/13![WestJet logo]()
$139
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.
Wed 10/148:55 pm -
1 stop15h 30m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/14![Multiple Airlines logo]()
$143
This Kissandfly.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 Kissandfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/112:15 pm -
1 stop9h 55m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/10![WestJet logo]()
$144
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.
Sun 10/412:15 pm -
1 stop8h 30m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/14![WestJet logo]()
$145
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.
Sun 10/1112:15 pm -
1 stop9h 30m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/13![WestJet logo]()
$153
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.
Tue 10/139:10 pm -
3 stops30h 00m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/14![Multiple Airlines logo]()
$153
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 10/110:47 pm -
3 stops20h 48m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/10![Multiple Airlines logo]()
$159
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 10/57:00 am -
2 stops22h 05m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/11![Multiple Airlines logo]()
$165
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 10/2710:55 pm -
3 stops24h 00m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/11![Multiple Airlines logo]()
$166
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 10/1710:44 pm -
2 stops19h 46m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/14![Multiple Airlines logo]()
$171
This FlightHub 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/2712:15 pm -
1 stop27h 00m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/12![WestJet logo]()
$177
Find flight deals from Colorado to Ontario
Keep the following information in mind while searching for Colorado to Ontario flight deals. Data was last updated September 15, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $307 (Kiwi.com) |
One-way from | $127 (Kiwi.com) |
Popular in | February |
Cheapest in | October |
Average price | $640 |
Good round-trip deal | $600 or less |
Good one-way deal | $273 or less |
Cheapflights Fare Finder
Customize your flight search to find flights from Colorado to Ontario 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 Colorado to Ontario that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
DenverToronto
DEN Denver Intl - YYZ Toronto Pearson Intl
DENYYZ
Denver Intl
Thu 10/1
12:15 pm-12:10 am
1 stop9h 55m
Toronto Pearson Intl
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$150
DenverToronto
DEN Denver Intl - YYZ Toronto Pearson Intl
DENYYZ
Denver Intl
Thu 10/1
10:47 pm-9:35 pm
3 stops20h 48m
Toronto Pearson Intl
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$159
DenverToronto
DEN Denver Intl - YYZ Toronto Pearson Intl
DENYYZ
Denver Intl
Sun 9/27
12:15 pm-5:10 am
2 stops14h 55m
Toronto Pearson Intl
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$167
DenverToronto
DEN Denver Intl - YYZ Toronto Pearson Intl
DENYYZ
Denver Intl
Fri 10/2
12:15 pm-5:10 am
2 stops14h 55m
Toronto Pearson Intl
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$176
DenverHamilton
DEN Denver Intl - YHM Hamilton
DENYHM
Denver Intl
Sun 9/27
12:15 pm-5:15 pm
1 stop27h 00m
Hamilton
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$177
DenverToronto
DEN Denver Intl - YKF Toronto Region of Waterloo Intl
DENYKF
Denver Intl
Sun 9/27
12:15 pm-7:50 pm
1 stop29h 35m
Toronto Region of Waterloo Intl
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$178
DenverToronto
DEN Denver Intl - YTZ Toronto Island
DENYTZ
Denver Intl
Tue 11/3
10:41 am-12:52 pm
2 stops24h 11m
Toronto Island
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$181
DenverToronto
DEN Denver Intl - YYZ Toronto Pearson Intl
DENYYZ
Denver Intl
Sat 10/17
6:09 pm-10:59 am
1 stop14h 50m
Toronto Pearson Intl
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$184
DenverToronto
DEN Denver Intl - YKF Toronto Region of Waterloo Intl
DENYKF
Denver Intl
Fri 10/2
12:15 pm-7:50 pm
1 stop29h 35m
Toronto Region of Waterloo Intl
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$185
DenverToronto
DEN Denver Intl - YYZ Toronto Pearson Intl
DENYYZ
Denver Intl
Wed 1/27
11:10 am-11:04 pm
1 stop9h 54m
Toronto Pearson Intl
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$207
Showing 1-10 of 60 resultsSorted by cheapest first
Best time to book a flight from Colorado to Ontario
Have a flexible travel schedule? Discover the best time to fly to Ontario from Colorado with our price prediction graph.
DEN-YYZ
COS-YYZ
DEN-YTZ
DEN-YHM
DEN-YKF
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 Colorado to Ontario
USCO-CAON
DEN-YYZ
COS-YYZ
DEN-YTZ
DEN-YHM
What is the cheapest month to book a flight from Colorado to Region of Ontario?
Currently, November is the cheapest month in which you can book a flight from Colorado to Region of Ontario (average of $554). Flying from Colorado to Region of Ontario in February is currently the most expensive (average of $686). 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 CO to ON?
Find hourly flight availability from Colorado to Ontario. 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.
Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Colorado to Region of Ontario as you normally would.
Weekly flight availability from Colorado to Region of Ontario
Explore weekly flight availability from Colorado to Ontario. 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 USCO to CAON are scheduled on a Monday (10 on average). You will have fewer flight options on Thursday, which is when the least amount of flights are scheduled (7 on average).
How much does it cost to fly round-trip from Colorado to Region of Ontario?
Airfare is typical for this route at the moment.
Colorado to Region of Ontario flights typically cost between $262 and $676 in December.The cheapest round-trip price found within the last 5 days was $326 on Multiple Airlines (Dec 10-Dec 14).
How far ahead should I book a flight from Colorado to Region of Ontario?
Booking 63 days in advance of your planned departure date is, on average, the best time to get cheap flights from Colorado to Region of Ontario. The general trend is that the closer you book to the departure date, the more expensive your flight will be.
Reviews of airlines servicing Ontario
Get insights into the airlines that provide service to Ontario. 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 Ontario. Reviews last updated September 15, 2026.
See what other customers who have flown with United Airlines and Air Canada from Colorado to Ontario have to say. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Boarding
7.7
Food
6.7
Overall
7.4
Entertainment
7.1
Crew
8.1
Comfort
7.3
Reviews
1 / 20
10.0
ExcellentMichelle,Dec 2025
DEN - MKE
Boarding
7.7
Food
6.7
Overall
7.4
Entertainment
7.1
Crew
8.1
Comfort
7.3
Reviews
1 / 20
10.0
ExcellentMichelle,Dec 2025
DEN - MKE
Boarding
7.7
Food
6.7
Overall
7.4
Entertainment
7.1
Crew
8.1
Comfort
7.3
Reviews
1 / 20
10.0
ExcellentMichelle,Dec 2025
DEN - MKE
Related info for your journey
Find useful and relevant information for your journey from Colorado to Ontario. 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 Colorado to Ontario
See prices for flight routes from nearby airports that may be better suited for you.
Complete your trip
Complete your trip to Ontario by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from Colorado to Ontario by cabin class
Find flights from Colorado to Ontario, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Colorado and Ontario flights
Browse other Colorado and Ontario 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 Ontario
Find the right flight back to Colorado after your stay in Ontario
Colorado to Ontario flights
Consider these flights traveling from Colorado to Ontario.
Top 2 airlines flying from Colorado to Ontario
Discover the top 2 airlines that operate flights from Colorado to Ontario. 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$222 | Average$684 | FlexibilityNo cancel fee | On-time67% | |
| Cheapest$268 | Average$706 | FlexibilityNo cancel fee | On-time69% |