$99+ Cheap flights 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 10/22. Fares are subject to change and may not be available on all flights or dates of travel.
— ONT
Oct 20 — Oct 271
Round-trip
1 adult, Economy
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1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
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Cheapest flights to OntarioExplore the most affordable flight options available to Ontario. Find the lowest fares based on data from user searches, with prices last updated on September 20, 2026.
Explore the most affordable flight options available to Ontario. Find the lowest fares based on data from user searches, with prices last updated on September 20, 2026.
This Frontier deal was found by Cheapflights users on 9/17. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/221:45 pm -
1 stop8h 20m
Fri 10/238:03 pm -
1 stop13h 47m
Deal found 9/17![Frontier logo]()
$215
This Mytrip deal was found by Cheapflights users on 9/17. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/221:45 pm -
1 stop8h 20m
Sat 10/246:15 am -
2 stops15h 14m
Deal found 9/17![Frontier logo]()
$262
This Mytrip deal was found by Cheapflights users on 9/19. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/2710:14 pm -
2 stops15h 21m
Sat 10/3111:52 am -
2 stops20h 44m
Deal found 9/19![Frontier logo]()
$271
This Mytrip deal was found by Cheapflights users on 9/19. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/2111:30 am -
2 stops15h 20m
Sat 10/316:25 am -
2 stops11h 54m
Deal found 9/19![Frontier logo]()
$287
This Mytrip deal was found by Cheapflights users on 9/17. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/215:55 am -
2 stops13h 53m
Fri 10/238:03 pm -
1 stop13h 47m
Deal found 9/17![Frontier logo]()
$289
This Mytrip deal was found by Cheapflights users on 9/19. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/2010:29 pm -
2 stops15h 00m
Tue 10/2711:52 am -
2 stops19h 44m
Deal found 9/19![Frontier logo]()
$292
This Frontier deal was found by Cheapflights users on 9/16. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/151:45 pm -
1 stop8h 20m
Mon 10/198:03 pm -
1 stop13h 47m
Deal found 9/16![Frontier logo]()
$293
This Mytrip deal was found by Cheapflights users on 9/19. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/2710:14 pm -
2 stops15h 21m
Wed 11/411:52 am -
2 stops19h 44m
Deal found 9/19![Frontier logo]()
$295
This Mytrip deal was found by Cheapflights users on 9/19. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/311:35 am -
2 stops15h 16m
Tue 11/176:25 am -
2 stops11h 54m
Deal found 9/19![Frontier logo]()
$298
This Priceline deal was found by Cheapflights users on 9/17. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/221:45 pm -
1 stop8h 20m
Sat 10/246:02 am -
1 stop9h 27m
Deal found 9/17![Multiple Airlines logo]()
$299
This Frontier deal was found by Cheapflights users on 9/16. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/151:45 pm -
1 stop8h 20m
Fri 10/238:03 pm -
1 stop13h 47m
Deal found 9/16![Frontier logo]()
$300
This Delta deal was found by Cheapflights users on 9/16. 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.
Tue 10/206:00 am -
1 stop8h 06m
Wed 10/2812:16 pm -
1 stop7h 25m
Deal found 9/16![Delta logo]()
$308
Best flights to OntarioDiscover carefully curated flight deals to Ontario that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 20, 2026.
Discover carefully curated flight deals to Ontario that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 20, 2026.
This Delta deal was found by Cheapflights users on 9/16. 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.
Tue 10/206:00 am -
1 stop8h 06m
Wed 11/181:15 pm -
1 stop7h 40m
Deal found 9/16![Delta logo]()
$321
This Alaska Airlines deal was found by Cheapflights users on 9/15. 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.
Tue 11/107:00 am -
1 stop11h 13m
Fri 11/137:13 pm -
1 stop9h 12m
Deal found 9/15![Alaska Airlines logo]()
$327
This United Airlines deal was found by Cheapflights users on 9/15. 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.
Sat 10/313:29 pm -
1 stop8h 22m
Sat 11/71:29 pm -
1 stop6h 46m
Deal found 9/15![United Airlines logo]()
$358
This Southwest deal was found by Cheapflights users on 9/19. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/1012:15 pm -
2 stops11h 30m
Sat 10/1712:45 pm -
1 stop7h 30m
Deal found 9/19![Southwest logo]()
$477
This Delta deal was found by Cheapflights users on 9/19. 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.
Sat 11/74:25 pm -
1 stop8h 46m
Wed 11/1112:18 pm -
1 stop9h 41m
Deal found 9/19![Delta logo]()
$327
This United Airlines deal was found by Cheapflights users on 9/17. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/287:23 am -
1 stop8h 10m
Tue 11/31:29 pm -
1 stop6h 46m
Deal found 9/17![United Airlines logo]()
$362
This Alaska Airlines deal was found by Cheapflights users on 9/17. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/165:20 pm -
1 stop9h 34m
Sat 10/247:25 am -
1 stop9h 00m
Deal found 9/17![Alaska Airlines logo]()
$372
This Delta deal was found by Cheapflights users on 9/19. 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.
Thu 11/126:00 am -
1 stop8h 03m
Sun 11/1511:10 pm -
1 stop8h 29m
Deal found 9/19![Delta logo]()
$353
This Alaska Airlines deal was found by Cheapflights users on 9/17. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/117:00 am -
1 stop11h 13m
Tue 11/1712:02 pm -
1 stop8h 57m
Deal found 9/17![Alaska Airlines logo]()
$399
This Delta deal was found by Cheapflights users on 9/17. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/246:40 am -
1 stop8h 40m
Thu 11/2612:18 pm -
1 stop9h 41m
Deal found 9/17![Delta logo]()
$365
This United Airlines deal was found by Cheapflights users on 9/17. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/313:29 pm -
1 stop8h 22m
Fri 11/66:00 am -
2 stops12h 29m
Deal found 9/17![United Airlines logo]()
$435
This Alaska Airlines deal was found by Cheapflights users on 9/19. 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.
Thu 12/107:00 am -
2 stops12h 56m
Fri 1/227:10 am -
1 stop9h 13m
Deal found 9/19![Alaska Airlines logo]()
$420
This Delta deal was found by Cheapflights users on 9/19. 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.
Fri 10/26:00 am -
1 stop8h 09m
Mon 10/510:00 pm -
1 stop9h 38m
Deal found 9/19![Delta logo]()
$382
This United Airlines deal was found by Cheapflights users on 9/19. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/273:29 pm -
1 stop8h 22m
Sat 10/315:00 am -
1 stop7h 47m
Deal found 9/19![United Airlines logo]()
$448
This Delta deal was found by Cheapflights users on 9/18. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/126:50 am -
1 stop8h 27m
Mon 11/1611:10 pm -
1 stop7h 20m
Deal found 9/18![Delta logo]()
$399
This Alaska Airlines deal was found by Cheapflights users on 9/15. 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.
Thu 12/39:00 am -
1 stop10h 05m
Sat 12/126:17 pm -
1 stop8h 38m
Deal found 9/15![Alaska Airlines logo]()
$459
This United Airlines deal was found by Cheapflights users on 9/19. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/37:45 am -
1 stop8h 01m
Tue 10/66:00 am -
2 stops12h 54m
Deal found 9/19![United Airlines logo]()
$462
This United Airlines deal was found by Cheapflights users on 9/15. 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.
Sat 10/37:45 am -
1 stop8h 01m
Sun 10/46:00 am -
1 stop10h 19m
Deal found 9/15![United Airlines logo]()
$477
This Delta deal was found by Cheapflights users on 9/19. 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.
Thu 10/16:00 am -
1 stop8h 09m
Fri 10/212:19 pm -
1 stop7h 20m
Deal found 9/19![Delta logo]()
$437
This Alaska Airlines deal was found by Cheapflights users on 9/19. 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.
Mon 9/287:25 am -
1 stop9h 51m
Mon 9/286:14 pm -
1 stop8h 47m
Deal found 9/19![Alaska Airlines logo]()
$486
This Alaska Airlines deal was found by Cheapflights users on 9/15. 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.
Wed 9/307:25 am -
1 stop9h 51m
Mon 10/56:56 pm -
1 stop9h 48m
Deal found 9/15![Alaska Airlines logo]()
$487
This Delta deal was found by Cheapflights users on 9/17. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/227:10 am -
1 stop13h 02m
Sun 10/256:00 pm -
1 stop10h 11m
Deal found 9/17![Delta logo]()
$448
This Alaska Airlines deal was found by Cheapflights users on 9/15. 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.
Thu 9/247:25 am -
1 stop9h 51m
Fri 9/256:14 pm -
1 stop8h 47m
Deal found 9/15![Alaska Airlines logo]()
$492
This United Airlines deal was found by Cheapflights users on 9/17. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/213:29 pm -
1 stop8h 22m
Thu 11/265:00 am -
1 stop7h 30m
Deal found 9/17![United Airlines logo]()
$549
This Delta deal was found by Cheapflights users on 9/16. 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.
Sun 11/86:00 am -
1 stop8h 06m
Tue 11/1012:18 pm -
1 stop7h 21m
Deal found 9/16![Delta logo]()
$469
This Alaska Airlines deal was found by Cheapflights users on 9/19. 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 12/24:29 pm -
1 stop10h 25m
Sat 12/56:17 pm -
1 stop8h 38m
Deal found 9/19![Alaska Airlines logo]()
$519
This Delta deal was found by Cheapflights users on 9/17. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/46:59 am -
1 stop8h 37m
Sun 11/811:15 pm -
1 stop10h 15m
Deal found 9/17![Delta logo]()
$479
This United Airlines deal was found by Cheapflights users on 9/15. 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.
Sat 10/242:38 pm -
1 stop9h 20m
Sun 11/81:29 pm -
1 stop8h 26m
Deal found 9/15![United Airlines logo]()
$590
This Delta deal was found by Cheapflights users on 9/17. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/86:00 am -
1 stop8h 06m
Wed 10/1412:16 pm -
1 stop7h 25m
Deal found 9/17![Delta logo]()
$488
This Alaska Airlines deal was found by Cheapflights users on 9/18. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/47:00 am -
1 stop11h 13m
Sun 11/86:00 am -
1 stop13h 55m
Deal found 9/18![Alaska Airlines logo]()
$565
Last-minute flights to OntarioDiscover last-minute flight deals to Ontario. Data last updated September 20, 2026 and is based on user searches.
Discover last-minute flight deals to Ontario. Data last updated September 20, 2026 and is based on user searches.
This Frontier deal was found by Cheapflights users on 9/16. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/151:45 pm -
1 stop8h 20m
Mon 10/198:03 pm -
1 stop13h 47m
Deal found 9/16![Frontier logo]()
$293
This Frontier deal was found by Cheapflights users on 9/16. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/151:45 pm -
1 stop8h 20m
Fri 10/238:03 pm -
1 stop13h 47m
Deal found 9/16![Frontier logo]()
$300
This Mytrip deal was found by Cheapflights users on 9/19. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/2010:29 pm -
2 stops15h 00m
Tue 10/2711:52 am -
2 stops19h 44m
Deal found 9/19![Frontier logo]()
$292
This Delta deal was found by Cheapflights users on 9/16. 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.
Tue 10/206:00 am -
1 stop8h 06m
Wed 10/2812:16 pm -
1 stop7h 25m
Deal found 9/16![Delta logo]()
$308
This Mytrip deal was found by Cheapflights users on 9/19. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/2111:30 am -
2 stops15h 20m
Sat 10/316:25 am -
2 stops11h 54m
Deal found 9/19![Frontier logo]()
$287
This Mytrip deal was found by Cheapflights users on 9/17. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/215:55 am -
2 stops13h 53m
Fri 10/238:03 pm -
1 stop13h 47m
Deal found 9/17![Frontier logo]()
$289
This Frontier deal was found by Cheapflights users on 9/17. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/221:45 pm -
1 stop8h 20m
Fri 10/238:03 pm -
1 stop13h 47m
Deal found 9/17![Frontier logo]()
$215
This Mytrip deal was found by Cheapflights users on 9/17. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/221:45 pm -
1 stop8h 20m
Sat 10/246:15 am -
2 stops15h 14m
Deal found 9/17![Frontier logo]()
$262
This Priceline deal was found by Cheapflights users on 9/17. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/221:45 pm -
1 stop8h 20m
Sat 10/246:02 am -
1 stop9h 27m
Deal found 9/17![Multiple Airlines logo]()
$299
This Priceline deal was found by Cheapflights users on 9/16. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/221:45 pm -
1 stop8h 20m
Mon 10/266:56 pm -
1 stop9h 03m
Deal found 9/16![Multiple Airlines logo]()
$304
This Mytrip deal was found by Cheapflights users on 9/19. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/2710:14 pm -
2 stops15h 21m
Sat 10/3111:52 am -
2 stops20h 44m
Deal found 9/19![Frontier logo]()
$271
This Mytrip deal was found by Cheapflights users on 9/19. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/2710:14 pm -
2 stops15h 21m
Wed 11/411:52 am -
2 stops19h 44m
Deal found 9/19![Frontier logo]()
$295
One-way flights to OntarioSearch for one-way flight options to Ontario. Find affordable one-way fares based on user searches. Data last updated September 20, 2026.
Search for one-way flight options to Ontario. Find affordable one-way fares based on user searches. Data last updated September 20, 2026.
This Frontier deal was found by Cheapflights users on 9/17. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/221:45 pm -
1 stop8h 20m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/17![Frontier logo]()
$99
This Frontier deal was found by Cheapflights users on 9/16. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/231:45 pm -
1 stop8h 23m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/16![Frontier logo]()
$106
This Trip.com deal was found by Cheapflights users on 9/19. 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.
Tue 11/1011:35 am -
2 stops26h 00m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/19![Frontier logo]()
$122
This Trip.com deal was found by Cheapflights users on 9/18. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/2710:14 pm -
2 stops15h 21m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/18![Frontier logo]()
$133
This Trip.com deal was found by Cheapflights users on 9/19. 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.
Tue 12/810:24 pm -
2 stops26h 53m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/19![Frontier logo]()
$138
This flugladen.de deal was found by Cheapflights users on 9/15. 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 flugladen.de is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/297:25 am -
1 stop9h 51m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/15![Alaska Airlines logo]()
$159
This United Airlines deal was found by Cheapflights users on 9/19. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/283:29 pm -
1 stop8h 22m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/19![United Airlines logo]()
$159
This Southwest deal was found by Cheapflights users on 9/15. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/51:20 pm -
1 stop12h 25m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/15![Southwest logo]()
$160
This Trip.com deal was found by Cheapflights users on 9/19. 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.
Fri 10/165:20 pm -
1 stop9h 34m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/19![Alaska Airlines logo]()
$161
This American Airlines deal was found by Cheapflights users on 9/16. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/307:15 am -
1 stop7h 51m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/16![American Airlines logo]()
$163
This American Airlines deal was found by Cheapflights users on 9/17. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/66:59 am -
1 stop7h 54m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/17![American Airlines logo]()
$163
This Delta deal was found by Cheapflights users on 9/18. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/31:59 pm -
1 stop7h 42m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/18![Delta logo]()
$164
Find flight deals to Ontario
Find the latest flights to Ontario in 2026, with up-to-date prices and availability. In the last 7 days, Cheapflights users made a total of 7,457,451 searches and data was last updated on September 20, 2026.
Popular in | June |
|---|---|
Cheapest in | January |
Average price | $433 |
Round-trip from | $327 |
One-way from | $99 |
Good round-trip deal | $497 or less |
Good one-way deal | $238 or less |
Cheapflights Fare Finder
Locate flights to Ontario that fit your budget, with regularly updated fares and availability. In the last 7 days, Cheapflights users made a total of 7,457,451 searches and data was last updated on September 20, 2026.
Use the filters below to find and compare flights to Ontario that are best for you.
Fly from
Route
Depart
Return
Cheapest round-trip
New YorkOntario
JFK New York John F Kennedy Intl - ONT Ontario
JFKONT
New York John F Kennedy Intl
Wed 10/28
6:00 am-11:06 am
1 stop8h 06m
Ontario
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$164
New YorkOntario
LGA New York LaGuardia - ONT Ontario
LGAONT
New York LaGuardia
Sun 11/1
8:00 am-2:05 pm
1 stop9h 05m
Ontario
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$164
New YorkOntario
JFK New York John F Kennedy Intl - ONT Ontario
JFKONT
New York John F Kennedy Intl
Sat 11/14
6:00 am-11:03 am
1 stop8h 03m
Ontario
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$164
New YorkOntario
LGA New York LaGuardia - ONT Ontario
LGAONT
New York LaGuardia
Fri 10/2
3:00 pm-10:24 pm
1 stop10h 24m
Ontario
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$164
New YorkOntario
LGA New York LaGuardia - ONT Ontario
LGAONT
New York LaGuardia
Thu 11/5
3:29 pm-8:51 pm
1 stop8h 22m
Ontario
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$179
New YorkOntario
LGA New York LaGuardia - ONT Ontario
LGAONT
New York LaGuardia
Tue 11/17
8:15 am-6:01 pm
2 stops12h 46m
Ontario
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$189
New YorkOntario
JFK New York John F Kennedy Intl - ONT Ontario
JFKONT
New York John F Kennedy Intl
Sun 11/15
6:00 am-11:08 am
1 stop8h 08m
Ontario
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$190
New WindsorOntario
SWF New Windsor Stewart - ONT Ontario
SWFONT
New Windsor Stewart
Mon 10/26
7:01 pm-4:38 pm
2 stops24h 37m
Ontario
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$193
New WindsorOntario
SWF New Windsor Stewart - ONT Ontario
SWFONT
New Windsor Stewart
Sun 10/25
11:58 am-10:35 am
3 stops49h 37m
Ontario
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$199
NewarkOntario
EWR Newark - ONT Ontario
EWRONT
Newark
Thu 10/29
5:05 pm-11:54 pm
1 stop9h 49m
Ontario
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$200
Showing 1-10 of 60 resultsSorted by cheapest first
Compare providers for flights to Ontario
Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals to Ontario in September.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy2 stars | Trust Score*1 star | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy- | Trust Score*3 stars | |
| Price Accuracy- | Trust Score*1 star |
- Most accurate provider: Out of all of the providers offering Ontario flight deals, Cheapflights users have found FlightHub to have the most accurate pricing on Cheapflights vs. their site about >95% of the time, users can find the same price on Ontario flight deals on Cheapflights and FlightHub. This is based on searches made for Ontario flights over the past month.
- Most trusted provider: FlightHub is the most trusted provider by Cheapflights users offering Ontario flight deals. With a user feedback rating of 3 out of 3 stars (3 being the best), FlightHub has received the most positive sentiment from Cheapflights users searching for flights to Ontario. This is based on data collected from Cheapflights searches made over the past month.
Best time to book a flight to Ontario
Have a flexible travel schedule? Discover the best time to fly to Ontario with our price prediction graph.
NYC-ONT
EWR-ONT
LGA-ONT
JFK-ONT
SWF-ONT
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 to Ontario
NYC-ONT
EWR-ONT
LGA-ONT
JFK-ONT
SWF-ONT
How long is the flight to Ontario?
On average, a flight from New York to Ontario takes 11 hours 18 minutes. Flights to Ontario from other popular cities in USA will vary in length. Below are a few examples of popular routes and their flight times.
Weekly flight availability to Ontario
The most flights from New York to Ontario are scheduled on a Tuesday (3 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (1 on average).
What are the most popular airlines that fly to Ontario?
The most popular airlines flying from New York to Ontario are American Airlines, JetBlue and United Airlines.
What are the cheapest airlines that fly to Ontario?
The cheapest airlines flying from New York to Ontario are Frontier, Delta and Southwest.
Rainfall in Ontario by month
Plan your trip to Ontario by taking into account the average rainfall totals by month.
In terms of precipitation, rainfall in Ontario ranges from 0.1 - 3.4 inches per month. February is typically the wettest month, when rainfall can reach 3.4 in. June is typically the driest time to visit Ontario when rainfall is around 0.1 in.
Temperature in Ontario by month
Plan your trip to Ontario by taking into account the average temperature totals by month.
If weather is an important factor for your trip to Ontario, use this chart to help with planning. For those seeking warmer temperatures, August is the ideal time of year to visit, when temperatures reach an average of 78.8 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 53.6 F).
When is the best time to book a flight to Ontario?
The price you pay for your flight to Ontario may vary depending on when you book. For the best chance of a lower fare, look to book 46 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.
The best insider tips for flights to Ontario
AI-powered summary based on content written by travel experts. AI can make mistakes.
Cheapflights partnered with top experts to bring you the best recommendations for your Ontario trip
Our travel experts
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 September 20, 2026.
Peruse reviews from past customers who have flown Southwest,Delta, andUnited Airlines to the United States to help guide your decision. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Comfort
8.0
Boarding
8.1
Food
7.0
Crew
8.6
Entertainment
7.5
Overall
8.0
Reviews
1 / 20
10.0
ExcellentWalter,May 2026
LAS - BUR
Comfort
8.0
Boarding
8.1
Food
7.0
Crew
8.6
Entertainment
7.5
Overall
8.0
Reviews
1 / 20
10.0
ExcellentWalter,May 2026
LAS - BUR
Comfort
8.0
Boarding
8.1
Food
7.0
Crew
8.6
Entertainment
7.5
Overall
8.0
Reviews
1 / 20
10.0
ExcellentWalter,May 2026
LAS - BUR
Comfort
8.0
Boarding
8.1
Food
7.0
Crew
8.6
Entertainment
7.5
Overall
8.0
Reviews
1 / 20
10.0
ExcellentWalter,May 2026
LAS - BUR
Comfort
8.0
Boarding
8.1
Food
7.0
Crew
8.6
Entertainment
7.5
Overall
8.0
Reviews
1 / 20
10.0
ExcellentWalter,May 2026
LAS - BUR
Comfort
8.0
Boarding
8.1
Food
7.0
Crew
8.6
Entertainment
7.5
Overall
8.0
Reviews
1 / 20
10.0
ExcellentWalter,May 2026
LAS - BUR
FAQs about flying to Ontario
Ontario, CA airport overview
At just 2.3 miles (3.7km) east of downtown Ontario, Ontario International Airport (ONT) is a small but well-equipped alternative to Los Angeles Airport and John Wayne Airport for passengers flying to California.
The number of flights to Ontario International Airport has been declining steadily in recent years (there were 4.8 million passengers in 2010, but the terminals are built to handle twice that) – some say due to the lack of direct flights to major destinations, in comparison with other airports nearby. However, those who use the airport agree that it is a convenient alternative, well connected to nearby air fields and towns, easy to get in and out of, clean and with good basic facilities.
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