$129+ Cheap flights from Colorado to Ontario
This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 4/14. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — YYZ
4月 16 — 4月 231
Round-trip
1 adult, Economy
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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 3月 17, 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 3月 17, 2026.
This American Airlines deal was found by Cheapflights users on 3/13. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
週三 4/87:00 am
DEN
- YUL
1 stop13h 58m
American Airlines
週一 4/134:16 pm
YUL
- DEN
1 stop8h 31m
American Airlines
Deal found 3/13![American Airlines logo]()
$337
This Kiwi.com deal was found by Cheapflights users on 3/13. 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.
週三 4/1510:29 pm
DEN
- YYZ
1 stop29h 51m
Multiple Airlines
週一 4/208:00 pm
YYZ
- DEN
1 stop9h 59m
Multiple Airlines
Deal found 3/13![Multiple Airlines logo]()
$341
This Kiwi.com deal was found by Cheapflights users on 3/14. 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.
週一 4/137:05 pm
DEN
- YYZ
1 stop9h 15m
Multiple Airlines
週一 4/208:00 pm
YYZ
- DEN
1 stop9h 59m
Multiple Airlines
Deal found 3/14![Multiple Airlines logo]()
$343
This Kiwi.com deal was found by Cheapflights users on 3/13. 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.
週一 4/137:05 pm
DEN
- YYZ
1 stop9h 15m
Multiple Airlines
週三 4/2211:00 am
YYZ
- DEN
2 stops15h 19m
Multiple Airlines
Deal found 3/13![Multiple Airlines logo]()
$344
This Kiwi.com deal was found by Cheapflights users on 3/14. 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.
週二 4/287:15 am
DEN
- YYZ
1 stop30h 30m
Multiple Airlines
週二 5/59:45 am
YYZ
- DEN
1 stop16h 24m
Multiple Airlines
Deal found 3/14![Multiple Airlines logo]()
$345
This American Airlines deal was found by Cheapflights users on 3/13. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
週日 5/106:13 am
DEN
- YUL
1 stop6h 31m
American Airlines
週六 5/167:45 am
YUL
- DEN
2 stops11h 54m
American Airlines
Deal found 3/13![American Airlines logo]()
$346
This American Airlines deal was found by Cheapflights users on 3/12. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
週四 4/235:30 am
DEN
- YUL
1 stop7h 14m
American Airlines
週二 4/287:29 am
YUL
- DEN
1 stop15h 02m
American Airlines
Deal found 3/12![American Airlines logo]()
$347
This Kiwi.com deal was found by Cheapflights users on 3/14. 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.
週六 4/187:05 pm
DEN
- YYZ
1 stop9h 15m
Multiple Airlines
週一 4/2710:30 pm
YYZ
- DEN
2 stops31h 29m
Multiple Airlines
Deal found 3/14![Multiple Airlines logo]()
$350
This Kiwi.com deal was found by Cheapflights users on 3/14. 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.
週六 4/187:05 pm
DEN
- YYZ
1 stop9h 15m
Multiple Airlines
週六 4/252:20 pm
YYZ
- DEN
1 stop10h 39m
Multiple Airlines
Deal found 3/14![Multiple Airlines logo]()
$358
This Kiwi.com deal was found by Cheapflights users on 3/14. 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.
週一 4/207:05 pm
DEN
- YYZ
1 stop9h 38m
Multiple Airlines
週一 4/2710:30 pm
YYZ
- DEN
2 stops31h 29m
Multiple Airlines
Deal found 3/14![Multiple Airlines logo]()
$361
This Kiwi.com deal was found by Cheapflights users on 3/16. Clicking the “Pick Dates” 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.
週五 5/296:10 am
DEN
- YYZ
1 stop15h 44m
Multiple Airlines
週一 6/11:45 pm
YYZ
- DEN
1 stop15h 40m
Multiple Airlines
Deal found 3/16![Multiple Airlines logo]()
$364
This Kiwi.com deal was found by Cheapflights users on 3/14. 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.
週一 4/2010:29 pm
DEN
- YYZ
2 stops29h 44m
Multiple Airlines
週六 4/252:20 pm
YYZ
- DEN
1 stop10h 39m
Multiple Airlines
Deal found 3/14![Multiple Airlines logo]()
$365
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 3月 17, 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 3月 17, 2026.
This Kiwi.com deal was found by Cheapflights users on 3/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
週六 4/119:00 pm
DEN
- YTZ
1 stop19h 47m
Multiple Airlines
週三 4/159:25 am
YTZ
- DEN
1 stop26h 47m
Multiple Airlines
Deal found 3/12![Multiple Airlines logo]()
$404
This Alaska Airlines deal was found by Cheapflights users on 3/15. 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.
週三 4/228:00 am
DEN
- YYZ
1 stop29h 45m
Alaska Airlines
週五 4/244:55 pm
YYZ
- DEN
1 stop9h 04m
Alaska Airlines
Deal found 3/15![Alaska Airlines logo]()
$425
This United Airlines deal was found by Cheapflights users on 3/15. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
週六 4/181:33 pm
COS
- YYZ
1 stop5h 59m
United Airlines
週五 4/2410:45 am
YYZ
- COS
1 stop7h 47m
United Airlines
Deal found 3/15![United Airlines logo]()
$440
This Air Canada deal was found by Cheapflights users on 3/16. Clicking the “Pick Dates” 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.
週二 5/511:25 am
DEN
- YTZ
1 stop6h 27m
Air Canada
週日 5/1012:30 pm
YTZ
- DEN
1 stop8h 30m
Air Canada
Deal found 3/16![Air Canada logo]()
$599
This Delta deal was found by Cheapflights users on 3/15. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
週五 9/115:35 pm
DEN
- YUL
1 stop13h 08m
Delta
週四 9/177:45 pm
YUL
- DEN
1 stop16h 11m
Delta
Deal found 3/15![Delta logo]()
$618
This Flightnetwork deal was found by Cheapflights users on 3/13. 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 Flightnetwork is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
週二 5/2612:15 pm
DEN
- YKF
1 stop29h 35m
WestJet
週二 6/28:40 pm
YKF
- DEN
1 stop16h 40m
WestJet
Deal found 3/13![WestJet logo]()
$674
This Alaska Airlines deal was found by Cheapflights users on 3/15. 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.
週六 5/28:00 am
DEN
- YYZ
1 stop29h 45m
Alaska Airlines
週二 5/54:55 pm
YYZ
- DEN
1 stop26h 16m
Alaska Airlines
Deal found 3/15![Alaska Airlines logo]()
$434
This United Airlines deal was found by Cheapflights users on 3/13. 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.
週三 4/291:33 pm
COS
- YYZ
1 stop5h 59m
United Airlines
週六 5/211:00 am
YYZ
- COS
2 stops11h 01m
United Airlines
Deal found 3/13![United Airlines logo]()
$462
This United Airlines deal was found by Cheapflights users on 3/15. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
週四 4/306:57 pm
COS
- YYZ
2 stops12h 22m
United Airlines
週四 5/710:45 am
YYZ
- COS
1 stop7h 46m
United Airlines
Deal found 3/15![United Airlines logo]()
$462
This Kiwi.com deal was found by Cheapflights users on 3/16. Clicking the “Pick Dates” 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.
週一 7/272:47 pm
DEN
- YTZ
1 stop23h 13m
Multiple Airlines
週一 8/31:45 pm
YTZ
- DEN
1 stop21h 17m
Multiple Airlines
Deal found 3/16![Multiple Airlines logo]()
$535
This Alaska Airlines deal was found by Cheapflights users on 3/16. Clicking the “Pick Dates” 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.
週五 5/16:00 am
DEN
- YYZ
1 stop31h 45m
Alaska Airlines
週日 5/34:55 pm
YYZ
- DEN
2 stops27h 34m
Alaska Airlines
Deal found 3/16![Alaska Airlines logo]()
$489
This Air Canada deal was found by Cheapflights users on 3/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
週日 4/2611:10 am
DEN
- YTZ
1 stop8h 22m
Air Canada
週日 5/310:45 am
YTZ
- DEN
1 stop10h 15m
Air Canada
Deal found 3/12![Air Canada logo]()
$608
This United Airlines deal was found by Cheapflights users on 3/12. 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.
週三 4/2211:42 am
COS
- YYZ
1 stop5h 55m
United Airlines
週六 4/255:50 pm
YYZ
- COS
1 stop6h 04m
United Airlines
Deal found 3/12![United Airlines logo]()
$508
This Delta deal was found by Cheapflights users on 3/12. 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.
週三 6/36:00 am
COS
- YUL
1 stop9h 42m
Delta
週六 6/67:00 am
YUL
- COS
1 stop7h 48m
Delta
Deal found 3/12![Delta logo]()
$618
This Air Canada deal was found by Cheapflights users on 3/14. 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.
週三 4/225:30 pm
DEN
- YTZ
1 stop14h 04m
Multiple Airlines
週五 4/2412:30 pm
YTZ
- DEN
1 stop9h 25m
Multiple Airlines
Deal found 3/14![Multiple Airlines logo]()
$613
This Delta deal was found by Cheapflights users on 3/12. 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.
週三 9/27:00 am
DEN
- YUL
1 stop9h 53m
Delta
週一 9/76:00 am
YUL
- DEN
1 stop10h 02m
Delta
Deal found 3/12![Delta logo]()
$621
This Alaska Airlines deal was found by Cheapflights users on 3/12. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
週四 4/306:00 am
DEN
- YYZ
1 stop31h 45m
Alaska Airlines
週日 5/104:55 pm
YYZ
- DEN
1 stop9h 04m
Alaska Airlines
Deal found 3/12![Alaska Airlines logo]()
$566
This FlightHub deal was found by Cheapflights users on 3/12. 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.
週一 7/2712:15 pm
DEN
- YKF
1 stop29h 35m
WestJet
週一 8/38:40 pm
YKF
- DEN
1 stop16h 40m
WestJet
Deal found 3/12![WestJet logo]()
$692
This United Airlines deal was found by Cheapflights users on 3/13. 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.
週六 4/255:13 pm
COS
- YUL
2 stops15h 27m
United Airlines
週二 4/286:10 am
YUL
- COS
1 stop17h 44m
United Airlines
Deal found 3/13![United Airlines logo]()
$521
This Air Canada deal was found by Cheapflights users on 3/16. Clicking the “Pick Dates” 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.
週四 5/1411:25 am
DEN
- YTZ
1 stop8h 07m
Air Canada
週二 5/1912:30 pm
YTZ
- DEN
1 stop8h 30m
Air Canada
Deal found 3/16![Air Canada logo]()
$691
This FlightHub deal was found by Cheapflights users on 3/12. 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.
週六 8/812:15 pm
DEN
- YKF
1 stop29h 35m
WestJet
週四 8/138:40 pm
YKF
- DEN
1 stop16h 40m
WestJet
Deal found 3/12![WestJet logo]()
$692
This Delta deal was found by Cheapflights users on 3/16. Clicking the “Pick Dates” 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.
週三 4/88:00 am
DEN
- YUL
2 stops13h 44m
Delta
週一 4/136:00 am
YUL
- DEN
1 stop9h 57m
Delta
Deal found 3/16![Delta logo]()
$633
This United Airlines deal was found by Cheapflights users on 3/15. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
週四 8/135:30 am
COS
- YYZ
1 stop15h 52m
United Airlines
週一 8/176:40 pm
YYZ
- COS
1 stop5h 24m
United Airlines
Deal found 3/15![United Airlines logo]()
$527
This Alaska Airlines deal was found by Cheapflights users on 3/12. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
週二 5/121:02 pm
DEN
- YYZ
2 stops24h 43m
Alaska Airlines
週五 5/154:55 pm
YYZ
- DEN
2 stops27h 30m
Alaska Airlines
Deal found 3/12![Alaska Airlines logo]()
$581
This Kiwi.com deal was found by Cheapflights users on 3/13. 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.
週六 8/89:00 pm
DEN
- YTZ
2 stops16h 10m
Multiple Airlines
週日 8/1610:50 am
YTZ
- DEN
1 stop12h 40m
Multiple Airlines
Deal found 3/13![Multiple Airlines logo]()
$642
This FlightHub deal was found by Cheapflights users on 3/12. 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.
週三 7/2912:15 pm
DEN
- YKF
1 stop29h 35m
WestJet
週日 8/28:40 pm
YKF
- DEN
1 stop16h 40m
WestJet
Deal found 3/12![WestJet logo]()
$692
This Delta deal was found by Cheapflights users on 3/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
週二 8/45:35 pm
DEN
- YUL
1 stop13h 08m
Delta
週三 8/129:28 am
YUL
- DEN
1 stop13h 11m
Delta
Deal found 3/13![Delta logo]()
$648
This Kiwi.com deal was found by Cheapflights users on 3/17. Clicking the “Pick Dates” 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.
週五 6/1211:59 pm
DEN
- YTZ
2 stops11h 01m
Multiple Airlines
週一 6/1510:50 am
YTZ
- DEN
1 stop12h 40m
Multiple Airlines
Deal found 3/17![Multiple Airlines logo]()
$679
This United Airlines deal was found by Cheapflights users on 3/14. 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.
週六 7/2511:31 am
COS
- YYZ
1 stop8h 01m
United Airlines
週六 8/111:00 am
YYZ
- COS
2 stops9h 54m
United Airlines
Deal found 3/14![United Airlines logo]()
$565
This Air Canada deal was found by Cheapflights users on 3/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
週三 4/157:05 pm
DEN
- YOW
1 stop9h 40m
Air Canada
週日 4/196:00 am
YOW
- DEN
1 stop6h 18m
Air Canada
Deal found 3/12![Air Canada logo]()
$760
Last-minute flights from Colorado to OntarioDiscover last-minute flight deals from Colorado to Ontario. Data last updated 3月 17, 2026 and is based on user searches.
Discover last-minute flight deals from Colorado to Ontario. Data last updated 3月 17, 2026 and is based on user searches.
This American Airlines deal was found by Cheapflights users on 3/13. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
週三 4/87:00 am
DEN
- YUL
1 stop13h 58m
American Airlines
週一 4/134:16 pm
YUL
- DEN
1 stop8h 31m
American Airlines
Deal found 3/13![American Airlines logo]()
$337
This Kiwi.com deal was found by Cheapflights users on 3/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
週六 4/119:00 pm
DEN
- YTZ
1 stop19h 47m
Multiple Airlines
週三 4/159:25 am
YTZ
- DEN
1 stop26h 47m
Multiple Airlines
Deal found 3/12![Multiple Airlines logo]()
$404
This Kiwi.com deal was found by Cheapflights users on 3/14. 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.
週一 4/137:05 pm
DEN
- YYZ
1 stop9h 15m
Multiple Airlines
週一 4/208:00 pm
YYZ
- DEN
1 stop9h 59m
Multiple Airlines
Deal found 3/14![Multiple Airlines logo]()
$343
This Kiwi.com deal was found by Cheapflights users on 3/13. 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.
週一 4/137:05 pm
DEN
- YYZ
1 stop9h 15m
Multiple Airlines
週三 4/2211:00 am
YYZ
- DEN
2 stops15h 19m
Multiple Airlines
Deal found 3/13![Multiple Airlines logo]()
$344
This Kiwi.com deal was found by Cheapflights users on 3/13. 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.
週三 4/1510:29 pm
DEN
- YYZ
1 stop29h 51m
Multiple Airlines
週一 4/208:00 pm
YYZ
- DEN
1 stop9h 59m
Multiple Airlines
Deal found 3/13![Multiple Airlines logo]()
$341
This Kiwi.com deal was found by Cheapflights users on 3/13. 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.
週三 4/1510:29 pm
DEN
- YYZ
2 stops19h 07m
Multiple Airlines
週五 4/172:20 pm
YYZ
- DEN
1 stop10h 39m
Multiple Airlines
Deal found 3/13![Multiple Airlines logo]()
$366
This Kiwi.com deal was found by Cheapflights users on 3/14. 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.
週六 4/187:05 pm
DEN
- YYZ
1 stop9h 15m
Multiple Airlines
週一 4/2710:30 pm
YYZ
- DEN
2 stops31h 29m
Multiple Airlines
Deal found 3/14![Multiple Airlines logo]()
$350
This Kiwi.com deal was found by Cheapflights users on 3/14. 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.
週六 4/187:05 pm
DEN
- YYZ
1 stop9h 15m
Multiple Airlines
週六 4/252:20 pm
YYZ
- DEN
1 stop10h 39m
Multiple Airlines
Deal found 3/14![Multiple Airlines logo]()
$358
This Kiwi.com deal was found by Cheapflights users on 3/14. 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.
週一 4/207:05 pm
DEN
- YYZ
1 stop9h 38m
Multiple Airlines
週一 4/2710:30 pm
YYZ
- DEN
2 stops31h 29m
Multiple Airlines
Deal found 3/14![Multiple Airlines logo]()
$361
This Kiwi.com deal was found by Cheapflights users on 3/14. 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.
週一 4/2010:29 pm
DEN
- YYZ
2 stops29h 44m
Multiple Airlines
週六 4/252:20 pm
YYZ
- DEN
1 stop10h 39m
Multiple Airlines
Deal found 3/14![Multiple Airlines logo]()
$365
This American Airlines deal was found by Cheapflights users on 3/12. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
週四 4/235:30 am
DEN
- YUL
1 stop7h 14m
American Airlines
週二 4/287:29 am
YUL
- DEN
1 stop15h 02m
American Airlines
Deal found 3/12![American Airlines logo]()
$347
This Kiwi.com deal was found by Cheapflights users on 3/14. 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.
週二 4/287:15 am
DEN
- YYZ
1 stop30h 30m
Multiple Airlines
週二 5/59:45 am
YYZ
- DEN
1 stop16h 24m
Multiple Airlines
Deal found 3/14![Multiple Airlines logo]()
$345
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 3月 17, 2026.
Search for one-way flight options from Colorado to Ontario. Find affordable one-way fares based on user searches. Data last updated 3月 17, 2026.
This Kiwi.com deal was found by Cheapflights users on 3/13. 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.
週二 4/1410:29 pm
DEN
- YYZ
3 stops23h 06m
Multiple Airlines
Deal found 3/13![Multiple Airlines logo]()
$129
This Kiwi.com deal was found by Cheapflights users on 3/13. 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.
週二 4/2810:29 pm
DEN
- YYZ
3 stops29h 16m
Multiple Airlines
Deal found 3/13![Multiple Airlines logo]()
$130
This American Airlines deal was found by Cheapflights users on 3/12. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
週日 4/57:00 am
DEN
- YUL
1 stop13h 48m
American Airlines
Deal found 3/12![American Airlines logo]()
$139
This Kiwi.com deal was found by Cheapflights users on 3/13. 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.
週二 4/2810:29 pm
DEN
- YUL
2 stops30h 36m
Multiple Airlines
Deal found 3/13![Multiple Airlines logo]()
$140
This Kiwi.com deal was found by Cheapflights users on 3/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
週二 4/141:09 pm
DEN
- YTZ
3 stops28h 54m
Multiple Airlines
Deal found 3/12![Multiple Airlines logo]()
$143
This American Airlines deal was found by Cheapflights users on 3/12. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
週五 4/105:30 am
DEN
- YUL
1 stop7h 14m
American Airlines
Deal found 3/12![American Airlines logo]()
$144
This Kiwi.com deal was found by Cheapflights users on 3/13. 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.
週二 6/27:01 pm
DEN
- YYZ
2 stops28h 04m
Multiple Airlines
Deal found 3/13![Multiple Airlines logo]()
$144
This Kiwi.com deal was found by Cheapflights users on 3/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
週六 4/187:05 pm
DEN
- YYZ
1 stop9h 15m
Multiple Airlines
Deal found 3/12![Multiple Airlines logo]()
$147
This Kiwi.com deal was found by Cheapflights users on 3/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
週二 4/72:30 pm
DEN
- YUL
2 stops14h 35m
Multiple Airlines
Deal found 3/12![Multiple Airlines logo]()
$149
This Kiwi.com deal was found by Cheapflights users on 3/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
週一 4/202:37 pm
DEN
- YYZ
2 stops13h 36m
Multiple Airlines
Deal found 3/12![Multiple Airlines logo]()
$150
This Kiwi.com deal was found by Cheapflights users on 3/17. Clicking the “Pick Dates” 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.
週三 6/310:29 pm
DEN
- YYZ
1 stop19h 40m
Multiple Airlines
Deal found 3/17![Multiple Airlines logo]()
$151
This Kiwi.com deal was found by Cheapflights users on 3/15. 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.
週六 6/64:59 pm
DEN
- YTZ
1 stop18h 06m
Multiple Airlines
Deal found 3/15![Multiple Airlines logo]()
$158
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 3月 17, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $337 (American Airlines) |
One-way from | $129 (Kiwi.com) |
Popular in | February |
Cheapest in | September |
Average price | $614 |
Good round-trip deal | $686 or less |
Good one-way deal | $296 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 2,558,603 searches. Data last updated 3月 17, 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 - YTZ
DENYTZ
Denver Intl
週六 4/11
9:00 pm-6:47 pm
1 stop19h 47m
Toronto Island
週三 4/15
9:25 am-10:12 am
1 stop26h 47m
$404
DenverToronto
DEN - YYZ
DENYYZ
Denver Intl
週三 4/22
8:00 am-3:45 pm
1 stop29h 45m
Toronto Pearson Intl
週五 4/24
4:55 pm-11:59 pm
1 stop9h 04m
$425
DenverToronto
DEN - YYZ
DENYYZ
Denver Intl
週六 5/2
8:00 am-3:45 pm
1 stop29h 45m
Toronto Pearson Intl
週二 5/5
4:55 pm-5:11 pm
1 stop26h 16m
$434
Colorado SpringsToronto
COS - YYZ
COSYYZ
Colorado Springs
週六 4/18
1:33 pm-9:32 pm
1 stop5h 59m
Toronto Pearson Intl
週五 4/24
10:45 am-4:32 pm
1 stop7h 47m
$440
Colorado SpringsToronto
COS - YYZ
COSYYZ
Colorado Springs
週三 4/29
1:33 pm-9:32 pm
1 stop5h 59m
Toronto Pearson Intl
週六 5/2
11:00 am-8:01 pm
2 stops11h 01m
$462
Colorado SpringsToronto
COS - YYZ
COSYYZ
Colorado Springs
週四 4/30
6:57 pm-9:19 am
2 stops12h 22m
Toronto Pearson Intl
週四 5/7
10:45 am-4:31 pm
1 stop7h 46m
$462
DenverToronto
DEN - YYZ
DENYYZ
Denver Intl
週五 5/1
6:00 am-3:45 pm
1 stop31h 45m
Toronto Pearson Intl
週日 5/3
4:55 pm-6:29 pm
2 stops27h 34m
$489
Quickest round-trip
Colorado SpringsToronto
COS - YYZ
COSYYZ
Colorado Springs
週三 4/22
11:42 am-7:37 pm
1 stop5h 55m
Toronto Pearson Intl
週六 4/25
5:50 pm-9:54 pm
1 stop6h 04m
$508
Colorado SpringsMontreal
COS - YUL
COSYUL
Colorado Springs
週六 4/25
5:13 pm-10:40 am
2 stops15h 27m
Montreal Pierre Elliott Trudeau Intl
週二 4/28
6:10 am-9:54 pm
1 stop17h 44m
$521
Colorado SpringsToronto
COS - YYZ
COSYYZ
Colorado Springs
週四 8/13
5:30 am-11:22 pm
1 stop15h 52m
Toronto Pearson Intl
週一 8/17
6:40 pm-10:04 pm
1 stop5h 24m
$527
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-YUL
DEN-YYZ
DEN-YTZ
COS-YUL
DEN-YHM
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-YUL
DEN-YYZ
DEN-YTZ
COS-YUL
What is the cheapest month to book a flight from Colorado to Region of Ontario?
Currently, March is the cheapest month in which you can book a flight from Colorado to Region of Ontario (average of $156). Flying from Colorado to Region of Ontario in April is currently the most expensive (average of $335). 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 3月 17, 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 3月 17, 2026.
The most flights from USCO to CAON are scheduled on a Monday (8 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (5 on average).
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 3月 17, 2026.
See what other customers who have flown with Delta,United Airlines, andWestJet from Colorado to Ontario have to say. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Food
7.2
Overall
7.9
Crew
8.5
Boarding
8.1
Entertainment
7.8
Comfort
7.9
Reviews
1 / 20
6.0
GoodJim,Nov 2025
AVL - ATL
Food
7.2
Overall
7.9
Crew
8.5
Boarding
8.1
Entertainment
7.8
Comfort
7.9
Reviews
1 / 20
6.0
GoodJim,Nov 2025
AVL - ATL
Food
7.2
Overall
7.9
Crew
8.5
Boarding
8.1
Entertainment
7.8
Comfort
7.9
Reviews
1 / 20
6.0
GoodJim,Nov 2025
AVL - ATL
Food
7.2
Overall
7.9
Crew
8.5
Boarding
8.1
Entertainment
7.8
Comfort
7.9
Reviews
1 / 20
6.0
GoodJim,Nov 2025
AVL - ATL
Food
7.2
Overall
7.9
Crew
8.5
Boarding
8.1
Entertainment
7.8
Comfort
7.9
Reviews
1 / 20
6.0
GoodJim,Nov 2025
AVL - ATL
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 3月 17, 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 4 airlines flying from Colorado to Ontario
Discover the top 4 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 2,558,603 searches. Data last updated 3月 17, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$81 | Average$676 | FlexibilityNo cancel fee | On-time67% | |
| Cheapest$144 | Average$327 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$177 | Average$514 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$258 | Average$358 | FlexibilityNo cancel fee | On-time60% |