$130+ Cheap flights from Denver (DEN) to Ontario
This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 12/2. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — YYZ
Dec 4 — Dec 111
Round-trip
1 adult, Economy
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Find cheap flights from Denver to Ontario with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
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 Denver to Ontario
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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 November 4, 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 November 4, 2026.
This Kiwi.com deal was found by Cheapflights users on 10/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/29:00 am -
2 stops26h 40m
Mon 12/71:40 pm -
1 stop8h 20m
Deal found 10/30![Multiple Airlines logo]()
$325
This Kiwi.com deal was found by Cheapflights users on 11/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/98:59 am -
1 stop7h 16m
Tue 12/151:10 pm -
1 stop28h 15m
Deal found 11/2![Multiple Airlines logo]()
$336
This Kiwi.com deal was found by Cheapflights users on 11/2. Clicking the “Pick Dates” 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 12/58:59 am -
1 stop7h 16m
Tue 12/151:10 pm -
1 stop28h 15m
Deal found 11/2![Multiple Airlines logo]()
$337
This Kiwi.com deal was found by Cheapflights users on 11/2. Clicking the “Pick Dates” 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 12/58:59 am -
1 stop7h 16m
Tue 12/81:10 pm -
1 stop28h 15m
Deal found 11/2![Multiple Airlines logo]()
$339
This Kiwi.com deal was found by Cheapflights users on 11/3. Clicking the “Pick Dates” 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 12/32:41 pm -
1 stop29h 10m
Mon 12/71:40 pm -
1 stop8h 20m
Deal found 11/3![Multiple Airlines logo]()
$342
This Kiwi.com deal was found by Cheapflights users on 10/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/158:59 am -
1 stop7h 16m
Tue 12/221:10 pm -
1 stop10h 26m
Deal found 10/31![Multiple Airlines logo]()
$344
This Kiwi.com deal was found by Cheapflights users on 10/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/122:26 pm -
1 stop29h 25m
Wed 1/64:20 pm -
2 stops50h 56m
Deal found 10/30![Multiple Airlines logo]()
$344
This Kiwi.com deal was found by Cheapflights users on 10/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/29:00 am -
2 stops26h 40m
Wed 12/99:55 am -
1 stop11h 50m
Deal found 10/30![Multiple Airlines logo]()
$358
This Kiwi.com deal was found by Cheapflights users on 11/2. Clicking the “Pick Dates” 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 12/72:26 pm -
1 stop29h 25m
Fri 12/111:40 pm -
1 stop8h 20m
Deal found 11/2![Multiple Airlines logo]()
$360
This Kiwi.com deal was found by Cheapflights users on 11/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/42:45 pm -
2 stops12h 15m
Tue 12/81:40 pm -
1 stop8h 19m
Deal found 11/2![Multiple Airlines logo]()
$364
This Kiwi.com deal was found by Cheapflights users on 11/2. Clicking the “Pick Dates” 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 12/38:54 am -
1 stop7h 21m
Thu 12/101:10 pm -
1 stop28h 15m
Deal found 11/2![Multiple Airlines logo]()
$376
This Kiwi.com deal was found by Cheapflights users on 10/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/48:54 am -
1 stop7h 21m
Mon 12/71:10 pm -
1 stop28h 15m
Deal found 10/30![Multiple Airlines logo]()
$383
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 November 4, 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 November 4, 2026.
This Kiwi.com deal was found by Cheapflights users on 11/2. Clicking the “Pick Dates” 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 12/38:54 am -
1 stop7h 21m
Tue 12/81:10 pm -
1 stop28h 15m
Deal found 11/2![Multiple Airlines logo]()
$339
This Delta deal was found by Cheapflights users on 11/1. Clicking the “Pick Dates” 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 11/221:27 pm -
1 stop7h 44m
Thu 11/2612:15 pm -
1 stop5h 12m
Deal found 11/1![Delta logo]()
$634
This United Airlines deal was found by Cheapflights users on 11/2. Clicking the “Pick Dates” 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 1/299:44 am -
Nonstop3h 18m
Mon 2/14:10 pm -
Nonstop4h 03m
Deal found 11/2![United Airlines logo]()
$675
This Kiwi.com deal was found by Cheapflights users on 11/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/88:59 am -
1 stop7h 16m
Mon 12/141:10 pm -
1 stop28h 15m
Deal found 11/2![Multiple Airlines logo]()
$339
This Kiwi.com deal was found by Cheapflights users on 10/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/158:59 am -
1 stop7h 16m
Tue 12/221:10 pm -
1 stop10h 26m
Deal found 10/31![Multiple Airlines logo]()
$344
This Kiwi.com deal was found by Cheapflights users on 10/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/48:54 am -
1 stop7h 21m
Mon 12/71:10 pm -
1 stop28h 15m
Deal found 10/30![Multiple Airlines logo]()
$383
This Kiwi.com deal was found by Cheapflights users on 11/2. Clicking the “Pick Dates” 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 12/38:54 am -
1 stop7h 21m
Thu 12/1012:15 pm -
2 stops21h 58m
Deal found 11/2![Multiple Airlines logo]()
$386
This Air Canada deal was found by Cheapflights users on 11/3. Clicking the “Pick Dates” 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.
Wed 12/91:30 pm -
1 stop6h 22m
Fri 12/115:30 am -
1 stop7h 05m
Deal found 11/3![Air Canada logo]()
$1,095
This Kiwi.com deal was found by Cheapflights users on 11/3. Clicking the “Pick Dates” 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 12/128:59 am -
1 stop7h 16m
Wed 1/69:10 am -
2 stops14h 07m
Deal found 11/3![Multiple Airlines logo]()
$396
This Kiwi.com deal was found by Cheapflights users on 10/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/118:59 am -
1 stop7h 16m
Mon 12/141:10 pm -
2 stops12h 58m
Deal found 10/30![Multiple Airlines logo]()
$410
This Delta deal was found by Cheapflights users on 11/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/252:29 pm -
1 stop7h 28m
Sat 1/26:15 am -
1 stop11h 14m
Deal found 11/1![Delta logo]()
$667
This United Airlines deal was found by Cheapflights users on 11/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/229:44 am -
Nonstop3h 18m
Fri 1/14:10 pm -
Nonstop4h 03m
Deal found 11/3![United Airlines logo]()
$676
This Kiwi.com deal was found by Cheapflights users on 10/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected ” under the list of providers to see comparable flight deals.
Mon 12/148:59 am -
1 stop7h 16m
Mon 12/211:10 pm -
1 stop10h 26m
Deal found 10/30![Multiple Airlines logo]()
$423
This United Airlines deal was found by Cheapflights users on 10/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/1111:50 am -
1 stop7h 34m
Mon 12/144:10 pm -
Nonstop3h 54m
Deal found 10/30![United Airlines logo]()
$685
This United Airlines deal was found by Cheapflights users on 11/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/312:13 pm -
1 stop7h 13m
Tue 1/54:10 pm -
Nonstop4h 03m
Deal found 11/2![United Airlines logo]()
$685
This Kiwi.com deal was found by Cheapflights users on 11/2. Clicking the “Pick Dates” 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 12/3110:44 pm -
2 stops17h 26m
Mon 1/41:10 pm -
1 stop10h 26m
Deal found 11/2![Multiple Airlines logo]()
$451
This United Airlines deal was found by Cheapflights users on 11/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/229:44 am -
Nonstop3h 18m
Wed 12/302:45 pm -
1 stop11h 30m
Deal found 11/2![United Airlines logo]()
$691
This United Airlines deal was found by Cheapflights users on 10/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/249:44 am -
Nonstop3h 18m
Sun 12/277:44 pm -
1 stop6h 31m
Deal found 10/31![United Airlines logo]()
$691
This Kiwi.com deal was found by Cheapflights users on 11/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/298:59 pm -
1 stop16h 01m
Mon 1/41:10 pm -
1 stop10h 26m
Deal found 11/2![Multiple Airlines logo]()
$487
This Air Canada deal was found by Cheapflights users on 11/2. Clicking the “Pick Dates” 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 12/61:30 pm -
1 stop6h 22m
Sat 12/125:30 am -
1 stop7h 05m
Deal found 11/2![Air Canada logo]()
$1,095
This Kiwi.com deal was found by Cheapflights users on 11/1. Clicking the “Pick Dates” 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 11/239:04 am -
1 stop7h 11m
Wed 11/259:10 am -
2 stops12h 27m
Deal found 11/1![Multiple Airlines logo]()
$488
This Mytrip deal was found by Cheapflights users on 11/3. Clicking the “Pick Dates” 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 11/268:50 am -
3 stops13h 47m
Thu 12/34:40 pm -
1 stop17h 29m
Deal found 11/3![Multiple Airlines logo]()
$489
This Mytrip deal was found by Cheapflights users on 11/3. Clicking the “Pick Dates” 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 11/266:45 am -
2 stops16h 11m
Fri 12/48:40 am -
2 stops17h 09m
Deal found 11/3![Multiple Airlines logo]()
$502
This Kiwi.com deal was found by Cheapflights users on 11/2. Clicking the “Pick Dates” 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 12/610:26 am -
2 stops29h 19m
Sat 12/1210:00 am -
1 stop13h 30m
Deal found 11/2![Multiple Airlines logo]()
$518
This United Airlines deal was found by Cheapflights users on 11/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/1711:32 am -
2 stops20h 27m
Thu 12/243:45 pm -
2 stops20h 15m
Deal found 11/2![United Airlines logo]()
$1,104
This Mytrip deal was found by Cheapflights users on 11/2. Clicking the “Pick Dates” 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 12/168:59 am -
2 stops9h 09m
Wed 12/236:35 am -
1 stop15h 47m
Deal found 11/2![Multiple Airlines logo]()
$635
This Kiwi.com deal was found by Cheapflights users on 11/2. Clicking the “Pick Dates” 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 12/2111:30 pm -
1 stop14h 10m
Mon 12/288:30 am -
2 stops17h 29m
Deal found 11/2![Multiple Airlines logo]()
$638
This Mytrip deal was found by Cheapflights users on 10/31. Clicking the “Pick Dates” 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.
Sat 11/286:42 am -
2 stops15h 55m
Sat 12/57:00 am -
2 stops14h 45m
Deal found 10/31![Multiple Airlines logo]()
$641
This United 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 United is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/119:50 am -
Nonstop3h 12m
Mon 12/142:55 pm -
Nonstop3h 55m
Deal found 10/30![Multiple Airlines logo]()
$653
This United 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 United is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 1/59:44 am -
Nonstop3h 18m
Fri 1/88:40 am -
Nonstop3h 55m
Deal found 10/30![Multiple Airlines logo]()
$667
Last-minute flights from Denver to OntarioDiscover last-minute flight deals from Denver to Ontario. Data last updated November 4, 2026 and is based on user searches.
Discover last-minute flight deals from Denver to Ontario. Data last updated November 4, 2026 and is based on user searches.
This Kiwi.com deal was found by Cheapflights users on 10/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/29:00 am -
2 stops26h 40m
Mon 12/71:40 pm -
1 stop8h 20m
Deal found 10/30![Multiple Airlines logo]()
$325
This Kiwi.com deal was found by Cheapflights users on 10/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/22:33 pm -
1 stop29h 18m
Tue 12/81:40 pm -
1 stop8h 19m
Deal found 10/30![Multiple Airlines logo]()
$334
This Kiwi.com deal was found by Cheapflights users on 10/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/29:00 am -
2 stops26h 40m
Wed 12/99:55 am -
1 stop11h 50m
Deal found 10/30![Multiple Airlines logo]()
$358
This Kiwi.com deal was found by Cheapflights users on 11/3. Clicking the “Pick Dates” 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 12/32:41 pm -
1 stop29h 10m
Mon 12/71:40 pm -
1 stop8h 20m
Deal found 11/3![Multiple Airlines logo]()
$342
This Kiwi.com deal was found by Cheapflights users on 11/2. Clicking the “Pick Dates” 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 12/38:54 am -
1 stop7h 21m
Thu 12/101:10 pm -
1 stop28h 15m
Deal found 11/2![Multiple Airlines logo]()
$376
This Kiwi.com deal was found by Cheapflights users on 11/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/42:45 pm -
2 stops12h 15m
Tue 12/81:40 pm -
1 stop8h 19m
Deal found 11/2![Multiple Airlines logo]()
$364
This Kiwi.com deal was found by Cheapflights users on 11/2. Clicking the “Pick Dates” 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 12/58:59 am -
1 stop7h 16m
Tue 12/151:10 pm -
1 stop28h 15m
Deal found 11/2![Multiple Airlines logo]()
$337
This Kiwi.com deal was found by Cheapflights users on 11/2. Clicking the “Pick Dates” 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 12/58:59 am -
1 stop7h 16m
Mon 12/141:10 pm -
1 stop28h 15m
Deal found 11/2![Multiple Airlines logo]()
$339
This Kiwi.com deal was found by Cheapflights users on 11/2. Clicking the “Pick Dates” 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 12/72:26 pm -
1 stop29h 25m
Fri 12/111:40 pm -
1 stop8h 20m
Deal found 11/2![Multiple Airlines logo]()
$360
This Kiwi.com deal was found by Cheapflights users on 11/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/98:59 am -
1 stop7h 16m
Tue 12/151:10 pm -
1 stop28h 15m
Deal found 11/2![Multiple Airlines logo]()
$336
This Kiwi.com deal was found by Cheapflights users on 10/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/122:26 pm -
1 stop29h 25m
Wed 1/64:20 pm -
2 stops50h 56m
Deal found 10/30![Multiple Airlines logo]()
$344
This Kiwi.com deal was found by Cheapflights users on 10/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/158:59 am -
1 stop7h 16m
Tue 12/221:10 pm -
1 stop10h 26m
Deal found 10/31![Multiple Airlines logo]()
$344
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 November 4, 2026.
Search for one-way flight options from Denver to Ontario. Find affordable one-way fares based on user searches. Data last updated November 4, 2026.
This Kiwi.com deal was found by Cheapflights users on 10/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/210:18 am -
3 stops25h 22m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/30![Multiple Airlines logo]()
$130
This Kiwi.com deal was found by Cheapflights users on 10/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/128:59 am -
1 stop7h 16m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/30![Multiple Airlines logo]()
$145
This Kiwi.com deal was found by Cheapflights users on 11/1. Clicking the “Pick Dates” 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 12/168:59 am -
1 stop7h 16m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/1![Multiple Airlines logo]()
$146
This Kiwi.com deal was found by Cheapflights users on 11/3. Clicking the “Pick Dates” 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 12/38:54 am -
1 stop7h 21m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/3![Multiple Airlines logo]()
$147
This Kiwi.com deal was found by Cheapflights users on 11/3. Clicking the “Pick Dates” 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 12/32:41 pm -
1 stop29h 10m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/3![Multiple Airlines logo]()
$153
This Kiwi.com deal was found by Cheapflights users on 11/1. Clicking the “Pick Dates” 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 12/164:00 pm -
2 stops21h 20m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/1![Multiple Airlines logo]()
$154
This Kiwi.com deal was found by Cheapflights users on 10/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/2510:51 am -
1 stop26h 29m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/30![Multiple Airlines logo]()
$156
This Kiwi.com deal was found by Cheapflights users on 11/3. Clicking the “Pick Dates” 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 12/57:10 am -
2 stops31h 05m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/3![Multiple Airlines logo]()
$167
This Kiwi.com deal was found by Cheapflights users on 10/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/266:20 am -
2 stops31h 00m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/30![Multiple Airlines logo]()
$168
This Kiwi.com deal was found by Cheapflights users on 11/3. Clicking the “Pick Dates” 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 12/127:10 am -
2 stops31h 05m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/3![Multiple Airlines logo]()
$173
This Mytrip deal was found by Cheapflights users on 11/3. Clicking the “Pick Dates” 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.
Sat 12/58:59 am -
2 stops10h 37m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/3![Multiple Airlines logo]()
$178
This Kiwi.com deal was found by Cheapflights users on 11/3. Clicking the “Pick Dates” 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 11/2610:25 am -
3 stops33h 33m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/3![Multiple Airlines logo]()
$204
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 November 4, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $323 (Kiwi.com) |
One-way from | $130 (Kiwi.com) |
Popular in | August |
Cheapest in | February |
Average price | $671 |
Good round-trip deal | $572 or less |
Good one-way deal | $341 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 7,457,451 searches. Data last updated November 4, 2026.
Use the filters below to find and compare flights from Denver to Ontario that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
DenverToronto
DEN Denver Intl - YTZ Toronto Island
DENYTZ
Denver Intl
Sat 12/12
8:59 am-6:15 pm
1 stop7h 16m
Toronto Island
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$145
DenverToronto
DEN Denver Intl - YYZ Toronto Pearson Intl
DENYYZ
Denver Intl
Thu 12/17
6:25 am-11:47 pm
2 stops15h 22m
Toronto Pearson Intl
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$189
DenverToronto
DEN Denver Intl - YYZ Toronto Pearson Intl
DENYYZ
Denver Intl
Sat 12/12
10:42 pm-12:45 pm
2 stops36h 03m
Toronto Pearson Intl
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$190
DenverToronto
DEN Denver Intl - YYZ Toronto Pearson Intl
DENYYZ
Denver Intl
Mon 11/16
4:14 pm-9:52 pm
1 stop27h 38m
Toronto Pearson Intl
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$199
DenverToronto
DEN Denver Intl - YYZ Toronto Pearson Intl
DENYYZ
Denver Intl
Mon 11/23
6:45 am-6:51 am
2 stops22h 06m
Toronto Pearson Intl
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$203
DenverToronto
DEN Denver Intl - YYZ Toronto Pearson Intl
DENYYZ
Denver Intl
Mon 11/9
5:40 pm-10:51 pm
Nonstop3h 11m
Toronto Pearson Intl
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$205
DenverOttawa
DEN Denver Intl - YOW Ottawa
DENYOW
Denver Intl
Wed 2/10
8:55 am-11:40 pm
2 stops12h 45m
Ottawa
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$206
DenverToronto
DEN Denver Intl - YTZ Toronto Island
DENYTZ
Denver Intl
Wed 12/23
8:35 am-6:15 pm
2 stops31h 40m
Toronto Island
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$211
DenverToronto
DEN Denver Intl - YTZ Toronto Island
DENYTZ
Denver Intl
Wed 12/16
11:59 pm-6:29 pm
3 stops16h 30m
Toronto Island
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$259
DenverOttawa
DEN Denver Intl - YOW Ottawa
DENYOW
Denver Intl
Fri 12/18
6:58 pm-12:09 am
1 stop27h 11m
Ottawa
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$259
Showing 1-10 of 57 resultsSorted by cheapest first
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-YTZ
DEN-YXU
DEN-YOW
DEN-YSB
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-YTZ
DEN-YXU
DEN-YOW
What is the cheapest month to book a flight from Denver to Region of Ontario?
Currently, December is the cheapest month in which you can book a flight from Denver to Region of Ontario (average of $585). Flying from Denver to Region of Ontario in February is currently the most expensive (average of $686). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
What is the cheapest time of day to fly from 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 November 4, 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 November 4, 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?
Airfare is below average for this route at the moment.
Denver to Region of Ontario flights typically cost between $457 and $728 in December.The cheapest round-trip price found within the last 5 days was $323 on Multiple Airlines (Dec 12-Jan 6).
How far ahead should I book a flight from Denver to Region of Ontario?
The best time to book flights from Denver to Region of Ontario is 32 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.
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 November 4, 2026.
Read reviews from past customers who have flown United Airlines and Air Canada from Denver to Ontario. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Crew
8.1
Boarding
7.7
Overall
7.3
Entertainment
7.1
Food
6.7
Comfort
7.3
Reviews
1 / 20
10.0
ExcellentMichelle,Dec 2025
DEN - MKE
Crew
8.1
Boarding
7.7
Overall
7.3
Entertainment
7.1
Food
6.7
Comfort
7.3
Reviews
1 / 20
10.0
ExcellentMichelle,Dec 2025
DEN - MKE
Crew
8.1
Boarding
7.7
Overall
7.3
Entertainment
7.1
Food
6.7
Comfort
7.3
Reviews
1 / 20
10.0
ExcellentMichelle,Dec 2025
DEN - MKE
Related info for your journey
Find useful and relevant information for your journey from 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
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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 November 4, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Top 2 airlines flying from Denver to Ontario
Discover the top 2 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 7,457,451 searches. Data last updated November 4, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$222 | Average$701 | FlexibilityNo cancel fee | On-time67% | |
| Cheapest$268 | Average$770 | FlexibilityNo cancel fee | On-time69% |