$136+ 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 11/26. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — YYZ
Nov 29 — Dec 61
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 October 30, 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 October 30, 2026.
This Kiwi.com deal was found by Cheapflights users on 10/28. 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.
Thu 12/311:59 pm -
1 stop11h 41m
Mon 12/79:35 am -
2 stops38h 20m
Deal found 10/28![Multiple Airlines logo]()
$304
This Mytrip deal was found by Cheapflights users on 10/28. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/411:59 pm -
1 stop11h 41m
Mon 12/76:30 am -
1 stop17h 00m
Deal found 10/28![Multiple Airlines logo]()
$313
This Kiwi.com deal was found by Cheapflights users on 10/28. 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.
Thu 12/1011:59 pm -
1 stop11h 41m
Mon 12/141:40 pm -
1 stop8h 20m
Deal found 10/28![Multiple Airlines logo]()
$317
This Kiwi.com deal was found by Cheapflights users on 10/26. 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.
Thu 11/196:30 am -
2 stops33h 40m
Mon 11/231:40 pm -
1 stop9h 51m
Deal found 10/26![Multiple Airlines logo]()
$325
This Kiwi.com deal was found by Cheapflights users on 10/25. Clicking the “Pick Dates” 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 11/256:30 am -
2 stops33h 45m
Tue 12/14:35 pm -
1 stop18h 27m
Deal found 10/25![Multiple Airlines logo]()
$330
This Kiwi.com deal was found by Cheapflights users on 10/27. 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 11/196:30 am -
2 stops33h 40m
Tue 11/241:40 pm -
1 stop9h 51m
Deal found 10/27![Multiple Airlines logo]()
$335
This Kiwi.com deal was found by Cheapflights users on 10/26. 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 11/256:00 am -
2 stops40h 55m
Tue 12/11:40 pm -
1 stop8h 45m
Deal found 10/26![Multiple Airlines logo]()
$338
This Kiwi.com deal was found by Cheapflights users on 10/29. 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.
Mon 12/1411:16 am -
2 stops50h 04m
Mon 1/113:55 pm -
1 stop18h 33m
Deal found 10/29![Multiple Airlines logo]()
$350
This Kiwi.com deal was found by Cheapflights users on 10/26. 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 11/98:55 pm -
1 stop16h 05m
Mon 11/164:35 pm -
1 stop17h 51m
Deal found 10/26![Multiple Airlines logo]()
$360
This Kiwi.com deal was found by Cheapflights users on 10/30. 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.
Fri 12/118:59 am -
1 stop7h 16m
Mon 12/141:10 pm -
1 stop28h 15m
Deal found 10/30![Multiple Airlines logo]()
$383
This Kiwi.com deal was found by Cheapflights users on 10/26. 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.
Thu 12/107:10 am -
2 stops33h 05m
Thu 12/174:35 pm -
1 stop19h 14m
Deal found 10/26![Multiple Airlines logo]()
$391
This Kiwi.com deal was found by Cheapflights users on 10/26. 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.
Tue 11/249:26 pm -
1 stop21h 39m
Tue 12/14:35 pm -
1 stop18h 27m
Deal found 10/26![Multiple Airlines logo]()
$402
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 October 30, 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 October 30, 2026.
This Kiwi.com deal was found by Cheapflights users on 10/25. Clicking the “Pick Dates” 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 11/259:26 pm -
1 stop15h 34m
Tue 12/14:35 pm -
1 stop18h 27m
Deal found 10/25![Multiple Airlines logo]()
$359
This American Airlines deal was found by Cheapflights users on 10/26. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/51:39 pm -
1 stop19h 17m
Tue 12/86:23 pm -
1 stop20h 46m
Deal found 10/26![American Airlines logo]()
$525
This United Airlines deal was found by Cheapflights users on 10/27. 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 1/1212:10 pm -
1 stop8h 27m
Wed 1/133:45 pm -
1 stop8h 06m
Deal found 10/27![United Airlines logo]()
$604
This Delta deal was found by Cheapflights users on 10/28. 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.
Mon 12/2112:55 am -
1 stop8h 20m
Fri 1/16:15 am -
1 stop7h 39m
Deal found 10/28![Delta logo]()
$634
This Alaska Airlines deal was found by Cheapflights users on 10/30. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/87:40 am -
2 stops30h 25m
Sat 12/125:15 pm -
2 stops23h 09m
Deal found 10/30![Alaska Airlines logo]()
$700
This Kiwi.com deal was found by Cheapflights users on 10/27. 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.
Fri 12/119:26 pm -
1 stop15h 34m
Mon 12/144:15 pm -
2 stops16h 14m
Deal found 10/27![Multiple Airlines logo]()
$395
This Gotogate deal was found by Cheapflights users on 10/26. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/97:00 pm -
2 stops12h 54m
Fri 11/1310:35 am -
1 stop8h 15m
Deal found 10/26![Air Canada logo]()
$879
This Kiwi.com deal was found by Cheapflights users on 10/29. 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.
Tue 12/88:59 am -
1 stop7h 16m
Sun 12/131:10 pm -
1 stop28h 15m
Deal found 10/29![Multiple Airlines logo]()
$416
This Kiwi.com deal was found by Cheapflights users on 10/29. 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 11/266:45 am -
2 stops14h 55m
Thu 12/34:40 pm -
1 stop17h 29m
Deal found 10/29![Multiple Airlines logo]()
$431
This Kiwi.com deal was found by Cheapflights users on 10/27. 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 2/49:15 pm -
2 stops15h 45m
Mon 2/84:35 pm -
1 stop17h 46m
Deal found 10/27![Multiple Airlines logo]()
$440
This American Airlines deal was found by Cheapflights users on 10/29. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/121:34 pm -
1 stop8h 12m
Sat 11/145:12 pm -
1 stop7h 34m
Deal found 10/29![American Airlines logo]()
$594
This United Airlines deal was found by Cheapflights users on 10/27. 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.
Sun 11/295:30 am -
1 stop7h 32m
Wed 12/26:45 am -
1 stop6h 17m
Deal found 10/27![United Airlines logo]()
$604
This Kiwi.com deal was found by Cheapflights users on 10/25. Clicking the “Pick Dates” 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 11/158:55 pm -
1 stop16h 05m
Sat 11/219:10 am -
2 stops25h 26m
Deal found 10/25![Multiple Airlines logo]()
$445
This United Airlines deal was found by Cheapflights users on 10/27. 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.
Sun 11/297:00 am -
1 stop6h 02m
Fri 12/44:10 pm -
1 stop6h 52m
Deal found 10/27![United Airlines logo]()
$604
This Kiwi.com deal was found by Cheapflights users on 10/25. Clicking the “Pick Dates” 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 12/107:47 am -
2 stops31h 13m
Thu 12/178:20 am -
1 stop15h 28m
Deal found 10/25![Multiple Airlines logo]()
$465
This United Airlines deal was found by Cheapflights users on 10/26. 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.
Wed 11/259:50 am -
Nonstop3h 12m
Tue 12/14:10 pm -
Nonstop3h 54m
Deal found 10/26![United Airlines logo]()
$621
This United Airlines deal was found by Cheapflights users on 10/28. 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.
Thu 12/39:50 am -
Nonstop3h 12m
Mon 12/74:10 pm -
Nonstop3h 54m
Deal found 10/28![United Airlines logo]()
$622
This Delta deal was found by Cheapflights users on 10/28. 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 12/16:10 am -
2 stops15h 30m
Sat 12/55:30 am -
2 stops13h 44m
Deal found 10/28![Delta logo]()
$835
This Air Canada deal was found by Cheapflights users on 10/26. 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 2/1511:25 am -
1 stop6h 27m
Sun 2/287:45 am -
1 stop12h 28m
Deal found 10/26![Air Canada logo]()
$897
This Mytrip deal was found by Cheapflights users on 10/26. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/127:10 pm -
2 stops22h 45m
Thu 11/1910:29 am -
2 stops11h 55m
Deal found 10/26![Multiple Airlines logo]()
$518
This Delta deal was found by Cheapflights users on 10/28. 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 12/110:35 am -
2 stops11h 05m
Sun 12/65:30 am -
2 stops13h 44m
Deal found 10/28![Delta logo]()
$835
This United Airlines deal was found by Cheapflights users on 10/25. Clicking the “Pick Dates” 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 12/2812:51 am -
1 stop6h 23m
Wed 12/304:10 pm -
Nonstop4h 03m
Deal found 10/25![United Airlines logo]()
$631
This Air Canada deal was found by Cheapflights users on 10/27. 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.
Sun 11/297:00 am -
2 stops12h 15m
Fri 12/48:35 am -
2 stops10h 25m
Deal found 10/27![Air Canada logo]()
$906
This Delta deal was found by Cheapflights users on 10/28. 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.
Thu 12/36:10 am -
2 stops15h 30m
Sun 12/65:30 am -
2 stops13h 44m
Deal found 10/28![Delta logo]()
$835
This Kiwi.com deal was found by Cheapflights users on 10/26. 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.
Tue 11/1010:41 am -
2 stops24h 09m
Sun 11/151:10 pm -
1 stop30h 12m
Deal found 10/26![Multiple Airlines logo]()
$523
This United Airlines deal was found by Cheapflights users on 10/28. 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.
Tue 12/226:00 am -
1 stop11h 01m
Fri 1/14:10 pm -
Nonstop4h 03m
Deal found 10/28![United Airlines logo]()
$658
This Delta deal was found by Cheapflights users on 10/28. 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.
Thu 12/36:10 am -
2 stops15h 30m
Sat 12/55:30 am -
2 stops13h 44m
Deal found 10/28![Delta logo]()
$835
This Mytrip deal was found by Cheapflights users on 10/26. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/910:41 am -
2 stops24h 09m
Thu 11/129:10 am -
2 stops14h 24m
Deal found 10/26![Multiple Airlines logo]()
$558
This Delta deal was found by Cheapflights users on 10/28. 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.
Wed 12/210:35 am -
2 stops11h 05m
Tue 12/85:30 am -
2 stops13h 44m
Deal found 10/28![Delta logo]()
$835
This United Airlines deal was found by Cheapflights users on 10/28. 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.
Sun 12/204:19 pm -
1 stop5h 40m
Tue 12/294:10 pm -
Nonstop4h 03m
Deal found 10/28![United Airlines logo]()
$717
Last-minute flights from Colorado to OntarioDiscover last-minute flight deals from Colorado to Ontario. Data last updated October 30, 2026 and is based on user searches.
Discover last-minute flight deals from Colorado to Ontario. Data last updated October 30, 2026 and is based on user searches.
This Kiwi.com deal was found by Cheapflights users on 10/26. 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 11/98:55 pm -
1 stop16h 05m
Mon 11/164:35 pm -
1 stop17h 51m
Deal found 10/26![Multiple Airlines logo]()
$360
This Kiwi.com deal was found by Cheapflights users on 10/26. 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.
Fri 11/136:30 am -
2 stops30h 50m
Tue 11/171:40 pm -
1 stop10h 08m
Deal found 10/26![Multiple Airlines logo]()
$377
This Kiwi.com deal was found by Cheapflights users on 10/27. 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 11/187:00 am -
1 stop10h 39m
Sat 11/216:30 am -
1 stop11h 00m
Deal found 10/27![Multiple Airlines logo]()
$374
This Kiwi.com deal was found by Cheapflights users on 10/26. 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.
Thu 11/196:30 am -
2 stops33h 40m
Mon 11/231:40 pm -
1 stop9h 51m
Deal found 10/26![Multiple Airlines logo]()
$325
This Kiwi.com deal was found by Cheapflights users on 10/27. 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 11/196:30 am -
2 stops33h 40m
Tue 11/241:40 pm -
1 stop9h 51m
Deal found 10/27![Multiple Airlines logo]()
$335
This Kiwi.com deal was found by Cheapflights users on 10/26. 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.
Fri 11/209:04 am -
1 stop7h 06m
Mon 11/231:40 pm -
1 stop9h 51m
Deal found 10/26![Multiple Airlines logo]()
$368
This Kiwi.com deal was found by Cheapflights users on 10/26. 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.
Sat 11/219:26 pm -
1 stop15h 34m
Mon 11/234:15 pm -
2 stops16h 21m
Deal found 10/26![Multiple Airlines logo]()
$412
This Kiwi.com deal was found by Cheapflights users on 10/27. 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 11/244:56 pm -
2 stops53h 59m
Tue 12/11:40 pm -
1 stop8h 45m
Deal found 10/27![Multiple Airlines logo]()
$373
This Kiwi.com deal was found by Cheapflights users on 10/26. 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.
Tue 11/249:26 pm -
1 stop21h 39m
Tue 12/14:35 pm -
1 stop18h 27m
Deal found 10/26![Multiple Airlines logo]()
$402
This Kiwi.com deal was found by Cheapflights users on 10/25. Clicking the “Pick Dates” 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 11/256:30 am -
2 stops33h 45m
Tue 12/14:35 pm -
1 stop18h 27m
Deal found 10/25![Multiple Airlines logo]()
$330
This Kiwi.com deal was found by Cheapflights users on 10/26. 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 11/256:00 am -
2 stops40h 55m
Tue 12/11:40 pm -
1 stop8h 45m
Deal found 10/26![Multiple Airlines logo]()
$338
This Kiwi.com deal was found by Cheapflights users on 10/29. 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 11/266:45 am -
2 stops14h 55m
Thu 12/34:40 pm -
1 stop17h 29m
Deal found 10/29![Multiple Airlines logo]()
$431
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 October 30, 2026.
Search for one-way flight options from Colorado to Ontario. Find affordable one-way fares based on user searches. Data last updated October 30, 2026.
This Trip.com deal was found by Cheapflights users on 10/29. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/266:25 am -
1 stop29h 15m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/29![Multiple Airlines logo]()
$136
This Kiwi.com deal was found by Cheapflights users on 10/27. 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 11/269:00 am -
2 stops25h 50m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/27![Multiple Airlines logo]()
$140
This Kiwi.com deal was found by Cheapflights users on 10/26. 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 12/910:18 am -
2 stops28h 52m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/26![Multiple Airlines logo]()
$144
This Kiwi.com deal was found by Cheapflights users on 10/27. 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 11/196:30 am -
2 stops33h 40m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/27![Multiple Airlines logo]()
$146
This Kiwi.com deal was found by Cheapflights users on 10/26. 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 12/98:16 pm -
2 stops38h 34m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/26![Multiple Airlines logo]()
$150
This Kiwi.com deal was found by Cheapflights users on 10/26. 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.
Thu 12/1010:42 pm -
1 stop18h 57m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/26![Multiple Airlines logo]()
$161
This Kiwi.com deal was found by Cheapflights users on 10/26. 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.
Thu 12/1010:26 am -
2 stops29h 49m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/26![Multiple Airlines logo]()
$165
This Kiwi.com deal was found by Cheapflights users on 10/28. 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 12/218:35 am -
2 stops13h 20m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/28![Multiple Airlines logo]()
$165
This Kiwi.com deal was found by Cheapflights users on 10/28. 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 12/122:26 pm -
1 stop29h 25m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/28![Multiple Airlines logo]()
$169
This Trip.com deal was found by Cheapflights users on 10/28. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/128:59 am -
1 stop7h 16m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/28![Multiple Airlines logo]()
$183
This Kiwi.com deal was found by Cheapflights users on 10/28. 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 12/213:00 pm -
1 stop25h 15m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/28![Multiple Airlines logo]()
$214
This Kiwi.com deal was found by Cheapflights users on 10/30. 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.
Fri 12/186:58 pm -
1 stop27h 11m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/30![Multiple Airlines logo]()
$259
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 October 30, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $304 (Kiwi.com) |
One-way from | $136 (Trip.com) |
Popular in | August |
Cheapest in | February |
Average price | $599 |
Good round-trip deal | $572 or less |
Good one-way deal | $353 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 October 30, 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
Mon 12/21
8:35 am-11:55 pm
2 stops13h 20m
Toronto Pearson Intl
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$165
DenverToronto
DEN Denver Intl - YTZ Toronto Island
DENYTZ
Denver Intl
Mon 12/21
6:25 am-6:15 pm
2 stops33h 50m
Toronto Island
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$168
DenverToronto
DEN Denver Intl - YTZ Toronto Island
DENYTZ
Denver Intl
Thu 12/10
9:26 pm-9:05 pm
1 stop21h 39m
Toronto Island
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$184
DenverToronto
DEN Denver Intl - YTZ Toronto Island
DENYTZ
Denver Intl
Sat 12/12
8:40 pm-6:15 pm
2 stops43h 35m
Toronto Island
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$186
DenverToronto
DEN Denver Intl - YYZ Toronto Pearson Intl
DENYYZ
Denver Intl
Mon 11/16
4:14 pm-9:52 pm
1 stop27h 38m
Toronto Pearson Intl
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$199
DenverToronto
DEN Denver Intl - YYZ Toronto Pearson Intl
DENYYZ
Denver Intl
Sat 12/12
10:29 pm-11:40 pm
3 stops23h 11m
Toronto Pearson Intl
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$207
DenverToronto
DEN Denver Intl - YTZ Toronto Island
DENYTZ
Denver Intl
Wed 11/11
10:41 am-12:50 pm
2 stops24h 09m
Toronto Island
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$222
DenverToronto
DEN Denver Intl - YYZ Toronto Pearson Intl
DENYYZ
Denver Intl
Tue 12/29
10:05 pm-6:52 am
2 stops30h 47m
Toronto Pearson Intl
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$256
DenverOttawa
DEN Denver Intl - YOW Ottawa
DENYOW
Denver Intl
Fri 12/18
6:58 pm-12:09 am
1 stop27h 11m
Ottawa
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$259
DenverToronto
DEN Denver Intl - YTZ Toronto Island
DENYTZ
Denver Intl
Thu 11/26
7:20 pm-6:28 pm
3 stops21h 08m
Toronto Island
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$264
Showing 1-10 of 56 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-YTZ
COS-YYZ
DEN-YYZ
DEN-YSB
DEN-YOW
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-YTZ
COS-YYZ
DEN-YYZ
DEN-YSB
What is the cheapest month to book a flight from Colorado to Region of Ontario?
Currently, December is the cheapest month in which you can book a flight from Colorado to Region of Ontario (average of $585). 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 October 30, 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.
How much does it cost to fly round-trip from Colorado to Region of Ontario?
Airfare is below average for this route at the moment.
Colorado to Region of Ontario flights typically cost between $457 and $728 in December.The cheapest round-trip price found within the last 5 days was $304 on Multiple Airlines (Dec 3-Dec 7).
How far ahead should I book a flight from Colorado to Region of Ontario?
Booking 32 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 October 30, 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.
Crew
8.1
Entertainment
7.1
Food
6.7
Boarding
7.7
Comfort
7.3
Overall
7.3
Reviews
1 / 20
10.0
ExcellentMichelle,Dec 2025
DEN - MKE
Crew
8.1
Entertainment
7.1
Food
6.7
Boarding
7.7
Comfort
7.3
Overall
7.3
Reviews
1 / 20
10.0
ExcellentMichelle,Dec 2025
DEN - MKE
Crew
8.1
Entertainment
7.1
Food
6.7
Boarding
7.7
Comfort
7.3
Overall
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 October 30, 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 October 30, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$222 | Average$706 | FlexibilityNo cancel fee | On-time67% | |
| Cheapest$268 | Average$727 | FlexibilityNo cancel fee | On-time69% |