$221+ 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 11/10. Fares are subject to change and may not be available on all flights or dates of travel.
YYZ — DEN
Nov 29 — Dec 61
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 October 30, 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 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 11/259:50 am -
1 stop17h 08m
Mon 11/308:59 pm -
2 stops47h 56m
Deal found 10/25![Multiple Airlines logo]()
$392
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 11/254:35 pm -
1 stop18h 01m
Wed 12/210:18 am -
2 stops24h 32m
Deal found 10/27![Multiple Airlines logo]()
$394
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 11/164:35 pm -
1 stop17h 51m
Tue 11/2411:59 pm -
2 stops16h 16m
Deal found 10/26![Multiple Airlines logo]()
$395
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 11/194:35 pm -
1 stop18h 01m
Wed 11/259:26 pm -
1 stop15h 34m
Deal found 10/27![Multiple Airlines logo]()
$396
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 12/101:40 pm -
1 stop8h 19m
Tue 12/154:25 pm -
3 stops20h 55m
Deal found 10/26![Multiple Airlines logo]()
$397
This Mytrip 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/199:50 am -
1 stop13h 15m
Wed 11/259:26 pm -
2 stops14h 20m
Deal found 10/27![Multiple Airlines logo]()
$400
This Mytrip 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/78:30 pm -
2 stops21h 13m
Thu 12/109:12 am -
2 stops19h 40m
Deal found 10/25![Multiple Airlines logo]()
$401
This Mytrip 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/79:10 am -
2 stops23h 19m
Thu 12/106:08 pm -
2 stops23h 47m
Deal found 10/25![Multiple Airlines logo]()
$402
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 11/161:00 pm -
2 stops21h 22m
Tue 11/246:45 am -
1 stop10h 54m
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.
Thu 12/101:40 pm -
1 stop8h 19m
Thu 12/1710:29 am -
1 stop9h 26m
Deal found 10/25![Multiple Airlines logo]()
$403
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 12/910:40 am -
1 stop23h 33m
Fri 12/119:08 am -
1 stop12h 39m
Deal found 10/26![Multiple Airlines logo]()
$404
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 11/189:50 am -
1 stop25h 50m
Mon 11/237:50 pm -
1 stop9h 01m
Deal found 10/26![Multiple Airlines logo]()
$405
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 October 30, 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 October 30, 2026.
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 11/194:35 pm -
1 stop18h 01m
Wed 11/259:26 pm -
1 stop15h 34m
Deal found 10/27![Multiple Airlines logo]()
$396
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 12/86:10 am -
2 stops16h 52m
Thu 12/107:00 am -
1 stop6h 02m
Deal found 10/27![United Airlines logo]()
$470
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/166:15 am -
1 stop8h 11m
Tue 12/81:40 pm -
1 stop8h 18m
Deal found 10/27![Delta logo]()
$470
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.
Fri 12/412:30 pm -
1 stop9h 57m
Tue 12/811:25 am -
1 stop8h 11m
Deal found 10/26![Air Canada logo]()
$510
This Mytrip 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/79:10 am -
2 stops23h 19m
Thu 12/106:08 pm -
2 stops23h 47m
Deal found 10/25![Multiple Airlines logo]()
$402
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 12/88:35 am -
2 stops7h 59m
Wed 12/911:43 am -
1 stop7h 32m
Deal found 10/27![United Airlines logo]()
$470
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/95:25 pm -
1 stop6h 42m
Sun 11/156:10 am -
1 stop5h 20m
Deal found 10/26![Delta logo]()
$477
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 12/64:10 pm -
1 stop6h 39m
Tue 12/221:03 pm -
2 stops8h 56m
Deal found 10/28![United Airlines logo]()
$470
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/246:15 am -
2 stops13h 30m
Sun 2/287:00 am -
1 stop7h 06m
Deal found 10/25![Delta logo]()
$478
This Mytrip 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/258:40 am -
2 stops17h 27m
Wed 12/28:07 pm -
3 stops23h 59m
Deal found 10/25![Multiple Airlines logo]()
$491
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 12/83:35 pm -
2 stops8h 28m
Tue 12/221:03 pm -
2 stops8h 56m
Deal found 10/28![United Airlines logo]()
$470
This United 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/174:10 pm -
Nonstop4h 03m
Sun 12/205:40 pm -
Nonstop3h 11m
Deal found 10/28![Multiple Airlines logo]()
$497
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/246:00 am -
1 stop5h 41m
Sun 11/296:10 am -
1 stop9h 10m
Deal found 10/26![Delta logo]()
$501
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.
Wed 12/94:10 pm -
1 stop6h 39m
Wed 12/165:45 am -
1 stop6h 18m
Deal found 10/28![United Airlines logo]()
$470
This United 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/164:10 pm -
Nonstop3h 54m
Fri 1/81:30 pm -
Nonstop3h 07m
Deal found 10/28![Multiple Airlines logo]()
$500
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 1/277:45 am -
1 stop8h 20m
Sat 1/306:00 am -
1 stop9h 10m
Deal found 10/26![Delta logo]()
$511
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.
Mon 11/167:26 pm -
2 stops17h 53m
Tue 12/81:40 pm -
2 stops8h 12m
Deal found 10/27![United Airlines logo]()
$470
This Mytrip 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/1110:29 am -
2 stops14h 02m
Fri 12/186:25 am -
2 stops12h 40m
Deal found 10/27![Multiple Airlines logo]()
$503
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.
Wed 1/1310:53 am -
2 stops8h 27m
Sat 1/168:45 am -
2 stops11h 52m
Deal found 10/25![United Airlines logo]()
$471
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.
Tue 11/247:00 am -
3 stops19h 07m
Tue 12/110:36 pm -
3 stops23h 04m
Deal found 10/26![Multiple Airlines logo]()
$509
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 11/194:10 pm -
Nonstop3h 54m
Sun 11/229:50 am -
Nonstop3h 12m
Deal found 10/28![United Airlines logo]()
$501
This Booking.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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/17:00 am -
2 stops14h 51m
Tue 12/110:36 pm -
3 stops23h 04m
Deal found 10/26![Multiple Airlines logo]()
$511
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/235:30 am -
2 stops13h 43m
Fri 11/276:10 am -
2 stops15h 30m
Deal found 10/27![Delta logo]()
$673
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.
Sat 12/192:45 pm -
1 stop11h 30m
Sat 1/25:50 am -
1 stop13h 25m
Deal found 10/28![United Airlines logo]()
$519
This United 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 1/274:10 pm -
Nonstop4h 03m
Fri 1/2911:25 am -
1 stop7h 25m
Deal found 10/27![Multiple Airlines logo]()
$522
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/225:30 am -
2 stops16h 50m
Sun 11/296:10 am -
2 stops15h 30m
Deal found 10/25![Delta logo]()
$674
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.
Wed 2/244:10 pm -
Nonstop3h 56m
Sun 2/2811:59 pm -
1 stop7h 15m
Deal found 10/25![United Airlines logo]()
$533
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.
Sun 12/204:35 pm -
1 stop19h 14m
Sun 1/38:59 pm -
1 stop16h 01m
Deal found 10/28![Multiple Airlines logo]()
$540
This United 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/64:10 pm -
Nonstop3h 54m
Fri 12/116:00 am -
1 stop10h 45m
Deal found 10/29![United Airlines logo]()
$534
This Mytrip 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/410:29 am -
2 stops13h 56m
Sat 12/56:59 pm -
2 stops18h 01m
Deal found 10/30![Multiple Airlines logo]()
$549
Last-minute flights from Ontario to ColoradoDiscover last-minute flight deals from Ontario to Colorado. Data last updated October 30, 2026 and is based on user searches.
Discover last-minute flight deals from Ontario to Colorado. 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 11/164:35 pm -
1 stop17h 51m
Tue 11/2411:59 pm -
2 stops16h 16m
Deal found 10/26![Multiple Airlines logo]()
$395
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 11/161:00 pm -
2 stops21h 22m
Tue 11/246:45 am -
1 stop10h 54m
Deal found 10/26![Multiple Airlines logo]()
$402
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 11/161:00 pm -
2 stops21h 22m
Thu 11/197:10 pm -
2 stops21h 00m
Deal found 10/26![Multiple Airlines logo]()
$415
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 11/189:50 am -
1 stop25h 50m
Mon 11/237:50 pm -
1 stop9h 01m
Deal found 10/26![Multiple Airlines logo]()
$405
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 11/194:35 pm -
1 stop18h 01m
Wed 11/259:26 pm -
1 stop15h 34m
Deal found 10/27![Multiple Airlines logo]()
$396
This Mytrip 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/199:50 am -
1 stop13h 15m
Wed 11/259:26 pm -
2 stops14h 20m
Deal found 10/27![Multiple Airlines logo]()
$400
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 11/194:35 pm -
1 stop18h 01m
Tue 11/2411:59 pm -
2 stops16h 16m
Deal found 10/26![Multiple Airlines logo]()
$416
This Mytrip 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/249:50 am -
2 stops17h 04m
Tue 12/18:46 pm -
3 stops24h 09m
Deal found 10/27![Multiple Airlines logo]()
$422
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 11/259:50 am -
1 stop17h 08m
Mon 11/308:59 pm -
2 stops47h 56m
Deal found 10/25![Multiple Airlines logo]()
$392
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 11/254:35 pm -
1 stop18h 01m
Wed 12/210:18 am -
2 stops24h 32m
Deal found 10/27![Multiple Airlines logo]()
$394
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 11/308:30 pm -
2 stops21h 15m
Thu 12/311:59 pm -
1 stop11h 41m
Deal found 10/26![Multiple Airlines logo]()
$413
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 11/308:30 pm -
2 stops38h 51m
Sat 12/129:12 am -
1 stop10h 08m
Deal found 10/26![Multiple Airlines logo]()
$420
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 October 30, 2026.
Search for one-way flight options from Ontario to Colorado. Find affordable one-way fares based on user searches. Data last updated October 30, 2026.
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 11/101:40 pm -
1 stop10h 08m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/27![Multiple Airlines logo]()
$221
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 12/122:25 pm -
3 stops44h 25m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/28![Multiple Airlines logo]()
$223
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.
Mon 11/161:10 pm -
1 stop30h 12m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/27![Multiple Airlines logo]()
$224
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 2/2610:20 am -
2 stops25h 11m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/27![Multiple Airlines logo]()
$225
This Mytrip 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/37:30 am -
2 stops18h 16m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/29![Multiple Airlines logo]()
$225
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 12/104:35 pm -
1 stop18h 54m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/26![Multiple Airlines logo]()
$226
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 12/109:50 am -
2 stops15h 57m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/26![Multiple Airlines logo]()
$226
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 11/2411:30 am -
2 stops24h 36m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/29![Multiple Airlines logo]()
$227
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.
Sun 12/131:10 pm -
1 stop28h 15m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/29![Multiple Airlines logo]()
$228
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.
Fri 11/131:40 pm -
1 stop10h 08m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/28![Multiple Airlines logo]()
$228
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 12/145:30 am -
3 stops38h 19m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/29![Multiple Airlines logo]()
$229
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 11/172:20 pm -
2 stops20h 42m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/28![Delta logo]()
$230
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 October 30, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $392 (Kiwi.com) |
One-way from | $221 (Kiwi.com) |
Popular in | October |
Cheapest in | April |
Average price | $557 |
Good round-trip deal | $518 or less |
Good one-way deal | $318 or less |
Cheapflights Fare Finder
Customize your flight search to find flights from Ontario to Colorado that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 7,457,451 searches. Data last updated October 30, 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
Sat 12/12
2:25 pm-8:50 am
3 stops44h 25m
Denver Intl
Wed 12/31
12:00 am-2:00 am
Nonstop0h 00m
$223
OttawaDenver
YOW Ottawa - DEN Denver Intl
YOWDEN
Ottawa
Fri 2/26
10:20 am-9:31 am
2 stops25h 11m
Denver Intl
Wed 12/31
12:00 am-2:00 am
Nonstop0h 00m
$225
TorontoDenver
YTZ Toronto Island - DEN Denver Intl
YTZDEN
Toronto Island
Sun 12/13
1:10 pm-3:25 pm
1 stop28h 15m
Denver Intl
Wed 12/31
12:00 am-2:00 am
Nonstop0h 00m
$228
OttawaDenver
YOW Ottawa - DEN Denver Intl
YOWDEN
Ottawa
Mon 12/14
5:30 am-5:49 pm
3 stops38h 19m
Denver Intl
Wed 12/31
12:00 am-2:00 am
Nonstop0h 00m
$229
TorontoDenver
YYZ Toronto Pearson Intl - DEN Denver Intl
YYZDEN
Toronto Pearson Intl
Tue 11/17
2:20 pm-9:02 am
2 stops20h 42m
Denver Intl
Wed 12/31
12:00 am-2:00 am
Nonstop0h 00m
$230
TorontoDenver
YYZ Toronto Pearson Intl - DEN Denver Intl
YYZDEN
Toronto Pearson Intl
Wed 11/18
2:20 pm-9:02 am
2 stops20h 42m
Denver Intl
Wed 12/31
12:00 am-2:00 am
Nonstop0h 00m
$230
TorontoDenver
YYZ Toronto Pearson Intl - DEN Denver Intl
YYZDEN
Toronto Pearson Intl
Mon 12/14
7:35 am-7:55 pm
2 stops14h 20m
Denver Intl
Wed 12/31
12:00 am-2:00 am
Nonstop0h 00m
$238
TorontoDenver
YYZ Toronto Pearson Intl - DEN Denver Intl
YYZDEN
Toronto Pearson Intl
Thu 12/10
5:25 pm-9:04 am
2 stops17h 39m
Denver Intl
Wed 12/31
12:00 am-2:00 am
Nonstop0h 00m
$240
OttawaDenver
YOW Ottawa - DEN Denver Intl
YOWDEN
Ottawa
Thu 12/10
3:15 pm-6:29 am
2 stops41h 14m
Denver Intl
Wed 12/31
12:00 am-2:00 am
Nonstop0h 00m
$240
TorontoDenver
YYZ Toronto Pearson Intl - DEN Denver Intl
YYZDEN
Toronto Pearson Intl
Fri 12/11
6:15 am-7:55 pm
2 stops15h 40m
Denver Intl
Wed 12/31
12:00 am-2:00 am
Nonstop0h 00m
$240
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.
YTZ-DEN
YYZ-GJT
YYZ-COS
YYZ-DEN
YOW-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
YTZ-DEN
YYZ-GJT
YYZ-COS
YYZ-DEN
What is the cheapest month to book a flight from Region of Ontario to Colorado?
Currently, September is the cheapest month in which you can book a flight from Region of Ontario to Colorado (average of $474). 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 October 30, 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.
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 $453 and $593 in November.The cheapest round-trip price found within the last 5 days was $392 on Multiple Airlines (Nov 25-Nov 30).
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 October 30, 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.
Entertainment
7.1
Overall
7.3
Boarding
7.7
Food
6.7
Comfort
7.3
Crew
8.1
Reviews
1 / 20
2.0
MediocreDawn,Aug 2026
ORD - DEN
Entertainment
7.1
Overall
7.3
Boarding
7.7
Food
6.7
Comfort
7.3
Crew
8.1
Reviews
1 / 20
2.0
MediocreDawn,Aug 2026
ORD - DEN
Entertainment
7.1
Overall
7.3
Boarding
7.7
Food
6.7
Comfort
7.3
Crew
8.1
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.
Browse thousands of different options on Cheapflights for your next trip
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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 October 30, 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 October 30, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$370 | Average$620 | FlexibilityNo cancel fee | On-time67% | |
| Cheapest$453 | Average$537 | FlexibilityNo cancel fee | On-time69% |