$106+ Cheap flights from Denver (DEN) 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 3/31. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — YYZ
Mar 24 — Mar 311
1 adult, Economy
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Find cheap flights from Denver to Ontario with Cheapflights
1. Tell us where you want to go
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Cheapest flights from Denver to OntarioExplore the most affordable flight options available from Denver to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on February 22, 2026.
Explore the most affordable flight options available from Denver to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on February 22, 2026.
This Kiwi.com deal was found by Cheapflights users on 2/18. Clicking the “Pick Dates” 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 4/1310:30 pm
DEN
- YYZ
2 stops19h 06m
Multiple Airlines
Fri 4/177:55 pm
YYZ
- DEN
1 stop10h 04m
Multiple Airlines
Deal found 2/18![Multiple Airlines logo]()
$257
This Kiwi.com deal was found by Cheapflights users on 2/19. Clicking the “Pick Dates” 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 4/166:30 am
DEN
- YYZ
1 stop11h 20m
Multiple Airlines
Mon 4/208:00 pm
YYZ
- DEN
1 stop30h 19m
Multiple Airlines
Deal found 2/19![Multiple Airlines logo]()
$260
This Kiwi.com deal was found by Cheapflights users on 2/20. Clicking the “Pick Dates” 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 4/166:30 am
DEN
- YYZ
1 stop11h 20m
Multiple Airlines
Tue 4/211:30 pm
YYZ
- DEN
2 stops16h 29m
Multiple Airlines
Deal found 2/20![Multiple Airlines logo]()
$262
This Kiwi.com deal was found by Cheapflights users on 2/21. Clicking the “Pick Dates” 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 4/17:05 pm
DEN
- YYZ
2 stops22h 31m
Multiple Airlines
Mon 4/68:00 pm
YYZ
- DEN
1 stop9h 59m
Multiple Airlines
Deal found 2/21![Multiple Airlines logo]()
$264
This Kiwi.com deal was found by Cheapflights users on 2/19. Clicking the “Pick Dates” 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 4/246:30 am
DEN
- YYZ
1 stop11h 20m
Multiple Airlines
Mon 4/277:55 pm
YYZ
- DEN
1 stop10h 04m
Multiple Airlines
Deal found 2/19![Multiple Airlines logo]()
$277
This Kiwi.com deal was found by Cheapflights users on 2/21. Clicking the “Pick Dates” 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 3/307:05 pm
DEN
- YYZ
1 stop9h 15m
Multiple Airlines
Wed 4/111:00 am
YYZ
- DEN
2 stops15h 20m
Multiple Airlines
Deal found 2/21![Multiple Airlines logo]()
$283
This Kiwi.com deal was found by Cheapflights users on 2/21. Clicking the “Pick Dates” 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 4/710:30 pm
DEN
- YYZ
2 stops29h 43m
Multiple Airlines
Tue 4/149:35 am
YYZ
- DEN
1 stop16h 44m
Multiple Airlines
Deal found 2/21![Multiple Airlines logo]()
$288
This Kiwi.com deal was found by Cheapflights users on 2/21. Clicking the “Pick Dates” 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 4/810:30 pm
DEN
- YYZ
1 stop30h 13m
Multiple Airlines
Wed 4/157:45 am
YYZ
- DEN
2 stops17h 14m
Multiple Airlines
Deal found 2/21![Multiple Airlines logo]()
$290
This Kiwi.com deal was found by Cheapflights users on 2/19. Clicking the “Pick Dates” 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 5/36:10 am
DEN
- YTZ
1 stop28h 55m
Multiple Airlines
Wed 5/68:50 am
YTZ
- DEN
2 stops15h 08m
Multiple Airlines
Deal found 2/19![Multiple Airlines logo]()
$296
This American Airlines deal was found by Cheapflights users on 2/20. Clicking the “Pick Dates” 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 4/235:30 am
DEN
- YUL
1 stop7h 14m
American Airlines
Sat 4/2512:30 pm
YUL
- DEN
1 stop6h 32m
American Airlines
Deal found 2/20![American Airlines logo]()
$336
This American Airlines deal was found by Cheapflights users on 2/21. Clicking the “Pick Dates” 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.
Tue 4/75:44 pm
DEN
- YUL
1 stop16h 00m
American Airlines
Tue 4/147:29 am
YUL
- DEN
1 stop12h 41m
American Airlines
Deal found 2/21![American Airlines logo]()
$338
This American Airlines deal was found by Cheapflights users on 2/22. Clicking the “Pick Dates” 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 4/48:00 am
DEN
- YUL
2 stops12h 48m
American Airlines
Fri 4/107:29 am
YUL
- DEN
1 stop15h 12m
American Airlines
Deal found 2/22![American Airlines logo]()
$346
Best flights from Denver to OntarioDiscover carefully curated flight deals from Denver to Ontario that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated February 22, 2026.
Discover carefully curated flight deals from Denver to Ontario that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated February 22, 2026.
This Kiwi.com deal was found by Cheapflights users on 2/18. Clicking the “Pick Dates” 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 4/1310:30 pm
DEN
- YYZ
2 stops19h 06m
Multiple Airlines
Fri 4/177:55 pm
YYZ
- DEN
1 stop10h 04m
Multiple Airlines
Deal found 2/18![Multiple Airlines logo]()
$257
This Alaska Airlines deal was found by Cheapflights users on 2/19. Clicking the “Pick Dates” 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.
Sun 5/36:00 am
DEN
- YYZ
1 stop31h 45m
Alaska Airlines
Wed 5/64:55 pm
YYZ
- DEN
1 stop33h 04m
Alaska Airlines
Deal found 2/19![Alaska Airlines logo]()
$395
This FlightHub deal was found by Cheapflights users on 2/18. Clicking the “Pick Dates” 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.
Sat 6/612:15 pm
DEN
- YYZ
2 stops14h 55m
WestJet
Mon 6/810:20 pm
YYZ
- DEN
2 stops15h 00m
WestJet
Deal found 2/18![WestJet logo]()
$464
This Air Canada deal was found by Cheapflights users on 2/18. Clicking the “Pick Dates” 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 4/136:05 pm
DEN
- YYZ
Nonstop3h 13m
Air Canada
Fri 4/172:50 pm
YYZ
- DEN
Nonstop3h 45m
Air Canada
Deal found 2/18![Air Canada logo]()
$472
This American Airlines deal was found by Cheapflights users on 2/19. Clicking the “Pick Dates” 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.
Sun 4/266:11 am
DEN
- YYZ
1 stop9h 32m
American Airlines
Mon 5/41:15 pm
YYZ
- DEN
1 stop5h 47m
American Airlines
Deal found 2/19![American Airlines logo]()
$485
This United Airlines deal was found by Cheapflights users on 2/21. Clicking the “Pick Dates” 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 4/97:17 pm
DEN
- YUL
1 stop14h 34m
United Airlines
Mon 4/139:15 am
YUL
- DEN
1 stop25h 40m
United Airlines
Deal found 2/21![United Airlines logo]()
$512
This Delta deal was found by Cheapflights users on 2/19. Clicking the “Pick Dates” 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 6/37:10 am
DEN
- YUL
1 stop9h 43m
Delta
Tue 6/99:28 am
YUL
- DEN
1 stop13h 11m
Delta
Deal found 2/19![Delta logo]()
$530
This Kiwi.com deal was found by Cheapflights users on 2/19. Clicking the “Pick Dates” 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 5/36:10 am
DEN
- YTZ
1 stop28h 55m
Multiple Airlines
Wed 5/68:50 am
YTZ
- DEN
2 stops15h 08m
Multiple Airlines
Deal found 2/19![Multiple Airlines logo]()
$296
This Kiwi.com deal was found by Cheapflights users on 2/18. Clicking the “Pick Dates” 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 4/410:05 am
DEN
- YYZ
1 stop7h 50m
Multiple Airlines
Sat 4/1111:15 am
YYZ
- DEN
2 stops22h 54m
Multiple Airlines
Deal found 2/18![Multiple Airlines logo]()
$380
This Alaska Airlines deal was found by Cheapflights users on 2/19. Clicking the “Pick Dates” 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.
Wed 5/138:00 am
DEN
- YYZ
2 stops29h 45m
Alaska Airlines
Sat 5/164:55 pm
YYZ
- DEN
2 stops20h 11m
Alaska Airlines
Deal found 2/19![Alaska Airlines logo]()
$454
This Air Canada deal was found by Cheapflights users on 2/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/48:45 am
DEN
- YYZ
1 stop9h 53m
Air Canada
Sat 4/112:50 pm
YYZ
- DEN
Nonstop3h 45m
Air Canada
Deal found 2/18![Air Canada logo]()
$477
This Kiwi.com deal was found by Cheapflights users on 2/18. Clicking the “Pick Dates” 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 4/510:45 am
DEN
- YYZ
1 stop8h 24m
Multiple Airlines
Sun 4/1210:15 pm
YYZ
- DEN
2 stops31h 44m
Multiple Airlines
Deal found 2/18![Multiple Airlines logo]()
$404
This American Airlines deal was found by Cheapflights users on 2/18. Clicking the “Pick Dates” 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 5/912:24 pm
DEN
- YUL
1 stop21h 20m
American Airlines
Wed 6/35:31 pm
YUL
- DEN
1 stop16h 53m
American Airlines
Deal found 2/18![American Airlines logo]()
$497
This FlightHub deal was found by Cheapflights users on 2/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/2412:15 pm
DEN
- YUL
1 stop9h 30m
WestJet
Wed 7/18:00 pm
YUL
- DEN
1 stop17h 20m
WestJet
Deal found 2/18![WestJet logo]()
$512
This United Airlines deal was found by Cheapflights users on 2/20. Clicking the “Pick Dates” 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 5/119:20 pm
DEN
- YUL
1 stop12h 40m
United Airlines
Wed 5/208:40 am
YUL
- DEN
1 stop14h 28m
United Airlines
Deal found 2/20![United Airlines logo]()
$518
This Air Canada deal was found by Cheapflights users on 2/19. Clicking the “Pick Dates” 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 4/246:05 pm
DEN
- YYZ
Nonstop3h 13m
Air Canada
Mon 4/279:05 am
YYZ
- DEN
1 stop10h 45m
Air Canada
Deal found 2/19![Air Canada logo]()
$477
This FlightHub deal was found by Cheapflights users on 2/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/1012:15 pm
DEN
- YKF
1 stop29h 35m
WestJet
Sun 6/148:40 pm
YKF
- DEN
1 stop16h 40m
WestJet
Deal found 2/19![WestJet logo]()
$515
This Kiwi.com deal was found by Cheapflights users on 2/19. Clicking the “Pick Dates” 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 3/176:00 am
DEN
- YOW
2 stops16h 02m
Multiple Airlines
Mon 3/239:35 am
YOW
- DEN
1 stop24h 43m
Multiple Airlines
Deal found 2/19![Multiple Airlines logo]()
$430
This Air Canada deal was found by Cheapflights users on 2/19. Clicking the “Pick Dates” 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 5/311:25 am
DEN
- YTZ
1 stop8h 07m
Air Canada
Wed 5/612:30 pm
YTZ
- DEN
1 stop8h 30m
Air Canada
Deal found 2/19![Air Canada logo]()
$480
This United Airlines deal was found by Cheapflights users on 2/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/159:20 pm
DEN
- YUL
1 stop12h 40m
United Airlines
Thu 5/214:55 pm
YUL
- DEN
1 stop9h 58m
United Airlines
Deal found 2/20![United Airlines logo]()
$541
This Kiwi.com deal was found by Cheapflights users on 2/19. Clicking the “Pick Dates” 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 4/2410:29 pm
DEN
- YTZ
2 stops14h 48m
Multiple Airlines
Mon 4/279:25 am
YTZ
- DEN
1 stop8h 39m
Multiple Airlines
Deal found 2/19![Multiple Airlines logo]()
$444
This Air Canada deal was found by Cheapflights users on 2/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/198:05 am
DEN
- YUL
1 stop10h 55m
Air Canada
Wed 3/257:30 am
YUL
- DEN
1 stop12h 14m
Air Canada
Deal found 2/18![Air Canada logo]()
$498
This Trip.com deal was found by Cheapflights users on 2/19. Clicking the “Pick Dates” 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 6/1812:15 pm
DEN
- YOW
1 stop15h 25m
WestJet
Sun 6/214:15 pm
YOW
- DEN
1 stop21h 05m
WestJet
Deal found 2/19![WestJet logo]()
$572
This Kiwi.com deal was found by Cheapflights users on 2/19. Clicking the “Pick Dates” 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 4/267:35 am
DEN
- YTZ
1 stop9h 55m
Multiple Airlines
Wed 4/299:25 am
YTZ
- DEN
2 stops20h 34m
Multiple Airlines
Deal found 2/19![Multiple Airlines logo]()
$450
This Gotogate deal was found by Cheapflights users on 2/18. Clicking the “Pick Dates” 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.
Sun 4/511:10 am
DEN
- YTZ
1 stop6h 42m
Air Canada
Sun 4/1212:30 pm
YTZ
- DEN
1 stop9h 25m
Air Canada
Deal found 2/18![Air Canada logo]()
$506
This Air Canada deal was found by Cheapflights users on 2/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/261:25 pm
DEN
- YUL
1 stop7h 57m
Air Canada
Sun 3/2911:10 am
YUL
- DEN
1 stop7h 28m
Air Canada
Deal found 2/18![Air Canada logo]()
$515
This FlightHub deal was found by Cheapflights users on 2/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/2912:15 pm
DEN
- YKF
1 stop29h 35m
WestJet
Sun 8/98:40 pm
YKF
- DEN
1 stop16h 40m
WestJet
Deal found 2/18![WestJet logo]()
$635
This Kiwi.com deal was found by Cheapflights users on 2/19. Clicking the “Pick Dates” 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 4/59:25 am
DEN
- YOW
1 stop12h 33m
Multiple Airlines
Sun 4/124:20 pm
YOW
- DEN
1 stop26h 38m
Multiple Airlines
Deal found 2/19![Multiple Airlines logo]()
$485
This United Airlines deal was found by Cheapflights users on 2/20. Clicking the “Pick Dates” 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 4/69:02 pm
DEN
- YXU
2 stops22h 16m
United Airlines
Mon 4/135:10 am
YXU
- DEN
1 stop7h 08m
United Airlines
Deal found 2/20![United Airlines logo]()
$789
This Kiwi.com deal was found by Cheapflights users on 2/20. Clicking the “Pick Dates” 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 5/134:36 pm
DEN
- YTZ
1 stop18h 25m
Multiple Airlines
Sat 5/2310:50 am
YTZ
- DEN
1 stop12h 40m
Multiple Airlines
Deal found 2/20![Multiple Airlines logo]()
$493
Last-minute flights from Denver to OntarioDiscover last-minute flight deals from Denver to Ontario. Data last updated February 22, 2026 and is based on user searches.
Discover last-minute flight deals from Denver to Ontario. Data last updated February 22, 2026 and is based on user searches.
This American Airlines deal was found by Cheapflights users on 2/20. Clicking the “Pick Dates” 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 2/287:00 am
DEN
- YYZ
1 stop12h 29m
American Airlines
Thu 3/51:10 pm
YYZ
- DEN
1 stop11h 27m
American Airlines
Deal found 2/20![American Airlines logo]()
$374
This Kiwi.com deal was found by Cheapflights users on 2/19. Clicking the “Pick Dates” 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 3/26:00 am
DEN
- YYZ
2 stops30h 20m
Multiple Airlines
Wed 3/47:10 am
YYZ
- DEN
1 stop17h 49m
Multiple Airlines
Deal found 2/19![Multiple Airlines logo]()
$373
This American Airlines deal was found by Cheapflights users on 2/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/46:20 am
DEN
- YYZ
1 stop7h 25m
American Airlines
Sat 3/76:17 pm
YYZ
- DEN
1 stop6h 20m
American Airlines
Deal found 2/20![American Airlines logo]()
$363
This American Airlines deal was found by Cheapflights users on 2/20. Clicking the “Pick Dates” 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 3/78:00 am
DEN
- YYZ
1 stop12h 39m
American Airlines
Thu 3/124:30 pm
YYZ
- DEN
1 stop8h 12m
American Airlines
Deal found 2/20![American Airlines logo]()
$336
This American Airlines deal was found by Cheapflights users on 2/20. Clicking the “Pick Dates” 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.
Tue 3/109:30 am
DEN
- YYZ
1 stop6h 59m
American Airlines
Mon 3/166:17 pm
YYZ
- DEN
1 stop6h 20m
American Airlines
Deal found 2/20![American Airlines logo]()
$315
This Kiwi.com deal was found by Cheapflights users on 2/20. Clicking the “Pick Dates” 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 3/118:17 am
DEN
- YYZ
2 stops33h 38m
Multiple Airlines
Wed 3/2510:00 am
YYZ
- DEN
1 stop16h 30m
Multiple Airlines
Deal found 2/20![Multiple Airlines logo]()
$356
This Kiwi.com deal was found by Cheapflights users on 2/20. Clicking the “Pick Dates” 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 3/157:05 pm
DEN
- YYZ
1 stop9h 38m
Multiple Airlines
Sun 3/228:00 pm
YYZ
- DEN
2 stops19h 29m
Multiple Airlines
Deal found 2/20![Multiple Airlines logo]()
$366
This Kiwi.com deal was found by Cheapflights users on 2/22. Clicking the “Pick Dates” 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 3/206:00 am
DEN
- YYZ
2 stops27h 35m
Multiple Airlines
Fri 3/278:00 pm
YYZ
- DEN
1 stop9h 56m
Multiple Airlines
Deal found 2/22![Multiple Airlines logo]()
$379
This American Airlines deal was found by Cheapflights users on 2/22. Clicking the “Pick Dates” 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.
Mon 3/2311:59 pm
DEN
- YUL
1 stop11h 46m
American Airlines
Thu 4/912:30 pm
YUL
- DEN
1 stop12h 15m
American Airlines
Deal found 2/22![American Airlines logo]()
$336
This Kiwi.com deal was found by Cheapflights users on 2/22. Clicking the “Pick Dates” 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 3/2410:30 pm
DEN
- YYZ
2 stops22h 41m
Multiple Airlines
Tue 3/319:35 am
YYZ
- DEN
1 stop16h 44m
Multiple Airlines
Deal found 2/22![Multiple Airlines logo]()
$338
This Kiwi.com deal was found by Cheapflights users on 2/21. Clicking the “Pick Dates” 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 3/307:05 pm
DEN
- YYZ
1 stop9h 15m
Multiple Airlines
Wed 4/111:00 am
YYZ
- DEN
2 stops15h 20m
Multiple Airlines
Deal found 2/21![Multiple Airlines logo]()
$283
This American Airlines deal was found by Cheapflights users on 2/21. Clicking the “Pick Dates” 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.
Mon 3/3011:59 pm
DEN
- YYZ
1 stop13h 46m
American Airlines
Wed 4/16:10 am
YYZ
- DEN
1 stop7h 26m
American Airlines
Deal found 2/21![American Airlines logo]()
$295
One-way flights from Denver to OntarioSearch for one-way flight options from Denver to Ontario. Find affordable one-way fares based on user searches. Data last updated February 22, 2026.
Search for one-way flight options from Denver to Ontario. Find affordable one-way fares based on user searches. Data last updated February 22, 2026.
This Kiwi.com deal was found by Cheapflights users on 2/19. Clicking the “Pick Dates” 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 3/3110:30 pm
DEN
- YYZ
3 stops29h 28m
Multiple Airlines
Deal found 2/19![Multiple Airlines logo]()
$106
This Kiwi.com deal was found by Cheapflights users on 2/18. Clicking the “Pick Dates” 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 3/1110:01 am
DEN
- YYZ
2 stops18h 12m
Multiple Airlines
Deal found 2/18![Multiple Airlines logo]()
$111
This Kiwi.com deal was found by Cheapflights users on 2/21. Clicking the “Pick Dates” 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 4/710:30 pm
DEN
- YYZ
3 stops29h 43m
Multiple Airlines
Deal found 2/21![Multiple Airlines logo]()
$113
This Kiwi.com deal was found by Cheapflights users on 2/21. Clicking the “Pick Dates” 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 4/810:30 pm
DEN
- YYZ
1 stop30h 13m
Multiple Airlines
Deal found 2/21![Multiple Airlines logo]()
$116
This American Airlines deal was found by Cheapflights users on 2/21. Clicking the “Pick Dates” 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.
Fri 4/105:44 pm
DEN
- YYZ
1 stop15h 09m
American Airlines
Deal found 2/21![American Airlines logo]()
$118
This Kiwi.com deal was found by Cheapflights users on 2/22. Clicking the “Pick Dates” 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 4/1911:59 pm
DEN
- YYZ
2 stops36h 06m
Multiple Airlines
Deal found 2/22![Multiple Airlines logo]()
$122
This American Airlines deal was found by Cheapflights users on 2/19. Clicking the “Pick Dates” 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.
Mon 4/611:59 pm
DEN
- YYZ
1 stop9h 02m
American Airlines
Deal found 2/19![American Airlines logo]()
$125
This Kiwi.com deal was found by Cheapflights users on 2/22. Clicking the “Pick Dates” 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 4/306:30 am
DEN
- YYZ
1 stop11h 20m
Multiple Airlines
Deal found 2/22![Multiple Airlines logo]()
$127
This American Airlines deal was found by Cheapflights users on 2/21. Clicking the “Pick Dates” 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.
Fri 5/85:44 pm
DEN
- YUL
1 stop16h 00m
American Airlines
Deal found 2/21![American Airlines logo]()
$139
This American Airlines deal was found by Cheapflights users on 2/21. Clicking the “Pick Dates” 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.
Mon 3/95:00 am
DEN
- YYZ
1 stop15h 39m
American Airlines
Deal found 2/21![American Airlines logo]()
$139
This Kiwi.com deal was found by Cheapflights users on 2/22. Clicking the “Pick Dates” 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 5/1311:59 pm
DEN
- YUL
2 stops36h 51m
Multiple Airlines
Deal found 2/22![Multiple Airlines logo]()
$153
This American Airlines deal was found by Cheapflights users on 2/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/47:00 am
DEN
- YUL
1 stop6h 04m
American Airlines
Deal found 2/18![American Airlines logo]()
$160
Find flight deals from Denver to Ontario
Keep the following information in mind while searching for Denver to Ontario flight deals. Data was last updated February 22, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $257 (Kiwi.com) |
One-way from | $106 (Kiwi.com) |
Popular in | January |
Cheapest in | September |
Average price | $570 |
Good round-trip deal | $575 or less |
Good one-way deal | $293 or less |
Cheapflights Fare Finder
Customize your flight search to find flights from Denver 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 February 22, 2026.
Use the filters below to find and compare flights from Denver to Ontario that are best for you.
Fly from
Denver
Fly to
Ontario
Route
Depart
Return
Price
DenverToronto
DEN - YYZ
DENYYZ
Denver Intl
Mon 4/13
10:30 pm-7:36 pm
2 stops19h 06m
Toronto Pearson Intl
Fri 4/17
7:55 pm-3:59 am
1 stop10h 04m
$257
DenverToronto
DEN - YTZ
DENYTZ
Denver Intl
Sun 5/3
6:10 am-1:05 pm
1 stop28h 55m
Toronto Island
Wed 5/6
8:50 am-9:58 pm
2 stops15h 08m
$296
DenverToronto
DEN - YYZ
DENYYZ
Denver Intl
Sat 4/4
10:05 am-7:55 pm
1 stop7h 50m
Toronto Pearson Intl
Sat 4/11
11:15 am-8:09 am
2 stops22h 54m
$380
DenverToronto
DEN - YYZ
DENYYZ
Denver Intl
Sun 5/3
6:00 am-3:45 pm
1 stop31h 45m
Toronto Pearson Intl
Wed 5/6
4:55 pm-11:59 pm
1 stop33h 04m
$395
DenverToronto
DEN - YYZ
DENYYZ
Denver Intl
Sun 4/5
10:45 am-9:09 pm
1 stop8h 24m
Toronto Pearson Intl
Sun 4/12
10:15 pm-3:59 am
2 stops31h 44m
$404
DenverOttawa
DEN - YOW
DENYOW
Denver Intl
Tue 3/17
6:00 am-12:02 am
2 stops16h 02m
Ottawa
Mon 3/23
9:35 am-8:18 am
1 stop24h 43m
$430
DenverToronto
DEN - YTZ
DENYTZ
Denver Intl
Fri 4/24
10:29 pm-3:17 pm
2 stops14h 48m
Toronto Island
Mon 4/27
9:25 am-4:04 pm
1 stop8h 39m
$444
DenverToronto
DEN - YTZ
DENYTZ
Denver Intl
Sun 4/26
7:35 am-7:30 pm
1 stop9h 55m
Toronto Island
Wed 4/29
9:25 am-3:59 am
2 stops20h 34m
$450
DenverToronto
DEN - YYZ
DENYYZ
Denver Intl
Wed 5/13
8:00 am-3:45 pm
2 stops29h 45m
Toronto Pearson Intl
Sat 5/16
4:55 pm-11:06 am
2 stops20h 11m
$454
DenverToronto
DEN - YYZ
DENYYZ
Denver Intl
Sat 6/6
12:15 pm-5:10 am
2 stops14h 55m
Toronto Pearson Intl
Mon 6/8
10:20 pm-11:20 am
2 stops15h 00m
$464
Showing 1-10 of 60 results
Best time to book a flight from Denver to Ontario
Have a flexible travel schedule? Discover the best time to fly to Ontario from Denver with our price prediction graph.
DEN-YYZ
DEN-YUL
DEN-YOW
DEN-YHM
DEN-YKF
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.
Cheapflights Insights
Everything you need to know about your flight from Denver to Ontario
DEN-CAON
DEN-YYZ
DEN-YUL
DEN-YOW
DEN-YHM
What is the cheapest month to book a flight from Denver to Region of Ontario?
Currently, June is the cheapest month in which you can book a flight from Denver to Region of Ontario (average of $135). Flying from Denver to Region of Ontario in February is currently the most expensive (average of $231). 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 DEN to ON?
Find hourly flight availability from Denver 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 February 22, 2026.
Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Denver to Region of Ontario as you normally would.
Weekly flight availability from Denver to Region of Ontario
Explore weekly flight availability from Denver 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 February 22, 2026.
The most flights from DEN to CAON are scheduled on a Monday (7 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (5 on average).
How much does it cost to fly round-trip from Denver to Region of Ontario?
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 February 22, 2026.
Read reviews from past customers who have flown Delta, United Airlines, and WestJet from Denver to Ontario. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Comfort
7.9
Crew
8.5
Entertainment
7.8
Overall
7.9
Food
7.2
Boarding
8.1
Reviews
1 / 20
6.0
GoodJim,Nov 2025
AVL - ATL
Comfort
7.9
Crew
8.5
Entertainment
7.8
Overall
7.9
Food
7.2
Boarding
8.1
Reviews
1 / 20
6.0
GoodJim,Nov 2025
AVL - ATL
Comfort
7.9
Crew
8.5
Entertainment
7.8
Overall
7.9
Food
7.2
Boarding
8.1
Reviews
1 / 20
6.0
GoodJim,Nov 2025
AVL - ATL
Comfort
7.9
Crew
8.5
Entertainment
7.8
Overall
7.9
Food
7.2
Boarding
8.1
Reviews
1 / 20
6.0
GoodJim,Nov 2025
AVL - ATL
Comfort
7.9
Crew
8.5
Entertainment
7.8
Overall
7.9
Food
7.2
Boarding
8.1
Reviews
1 / 20
6.0
GoodJim,Nov 2025
AVL - ATL
Related info for your journey
Find useful and relevant information for your journey from Denver 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 Denver 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 Denver to Ontario by cabin class
Find flights from Denver to Ontario, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Denver and Ontario flights
Browse other Denver and Ontario flight options. Last updated on February 22, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Denver to Ontario flights
Consider these flights traveling from Denver to Ontario.
Top 4 airlines flying from Denver to Ontario
Discover the top 4 airlines that operate flights from Denver 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 February 22, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$130 | Average$333 | FlexibilityNo cancel fee | On-time60% | |
| Cheapest$198 | Average$535 | FlexibilityNo cancel fee | On-time67% | |
| Cheapest$198 | Average$461 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$218 | Average$507 | FlexibilityNo cancel fee | On-time69% |