$92+ Cheap flights from Idaho to Ontario (ONT)
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 10/30. Fares are subject to change and may not be available on all flights or dates of travel.
BOI — ONT
Sep 23 — Sep 301
Round-trip
1 adult, Economy
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Find cheap flights from Idaho 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 Idaho to Ontario
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Cheapest flights from Idaho to OntarioExplore the most affordable flight options available from Idaho to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 24, 2026.
Explore the most affordable flight options available from Idaho to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 24, 2026.
This Frontier deal was found by Cheapflights users on 8/19. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/251:24 pm -
1 stop11h 26m
Tue 9/16:00 am -
1 stop5h 29m
Deal found 8/19![Frontier logo]()
$154
This Frontier deal was found by Cheapflights users on 8/19. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/81:24 pm -
1 stop11h 26m
Fri 9/118:00 am -
1 stop4h 55m
Deal found 8/19![Frontier logo]()
$169
This Frontier deal was found by Cheapflights users on 8/19. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/3012:24 pm -
1 stop12h 26m
Wed 9/27:56 pm -
1 stop14h 33m
Deal found 8/19![Frontier logo]()
$170
This Kiwi.com deal was found by Cheapflights users on 8/19. 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 9/81:24 pm -
1 stop11h 26m
Wed 9/162:30 pm -
1 stop22h 25m
Deal found 8/19![Frontier logo]()
$181
This Kiwi.com deal was found by Cheapflights users on 8/19. 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 8/2712:24 pm -
1 stop12h 26m
Sat 8/297:56 pm -
1 stop14h 33m
Deal found 8/19![Frontier logo]()
$192
This Priceline deal was found by Cheapflights users on 8/19. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/193:02 pm -
Nonstop2h 08m
Wed 9/234:50 pm -
Nonstop1h 55m
Deal found 8/19![Alaska Airlines logo]()
$197
This Frontier deal was found by Cheapflights users on 8/19. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/81:24 pm -
1 stop11h 26m
Mon 9/148:00 am -
1 stop4h 55m
Deal found 8/19![Frontier logo]()
$199
This Booking.com deal was found by Cheapflights users on 8/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/303:02 pm -
Nonstop2h 08m
Wed 10/74:42 pm -
Nonstop2h 01m
Deal found 8/23![Alaska Airlines logo]()
$201
This Trip.com deal was found by Cheapflights users on 8/19. 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.
Sun 8/3012:24 pm -
1 stop12h 26m
Tue 9/16:00 am -
1 stop5h 29m
Deal found 8/19![Frontier logo]()
$202
This CheapOair deal was found by Cheapflights users on 8/21. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/251:24 pm -
1 stop21h 40m
Wed 8/267:56 pm -
1 stop14h 33m
Deal found 8/21![Frontier logo]()
$204
This Alaska Airlines deal was found by Cheapflights users on 8/19. 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.
Sat 9/263:02 pm -
Nonstop2h 08m
Tue 9/294:50 pm -
Nonstop1h 55m
Deal found 8/19![Alaska Airlines logo]()
$207
This Kiwi.com deal was found by Cheapflights users on 8/21. 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.
Fri 10/308:28 pm -
1 stop13h 37m
Sun 11/18:35 pm -
1 stop15h 01m
Deal found 8/21![Multiple Airlines logo]()
$307
Best flights from Idaho to OntarioDiscover carefully curated flight deals from Idaho to Ontario that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 24, 2026.
Discover carefully curated flight deals from Idaho to Ontario that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 24, 2026.
This Alaska Airlines deal was found by Cheapflights users on 8/23. Clicking the “Pick Dates” 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 11/62:08 pm -
Nonstop2h 16m
Sat 11/144:04 pm -
Nonstop2h 00m
Deal found 8/23![Alaska Airlines logo]()
$207
This Delta deal was found by Cheapflights users on 8/22. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/235:00 am -
1 stop6h 17m
Mon 11/235:59 pm -
1 stop4h 45m
Deal found 8/22![Delta logo]()
$339
This United Airlines deal was found by Cheapflights users on 8/21. 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.
Fri 10/302:25 pm -
1 stop7h 26m
Sun 11/15:00 am -
1 stop7h 25m
Deal found 8/21![United Airlines logo]()
$399
This Southwest deal was found by Cheapflights users on 8/19. 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.
Mon 2/155:00 am -
1 stop6h 45m
Fri 2/195:00 am -
1 stop4h 40m
Deal found 8/19![Southwest logo]()
$401
This Alaska Airlines deal was found by Cheapflights users on 8/23. Clicking the “Pick Dates” 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 10/304:54 pm -
Nonstop2h 11m
Tue 11/34:06 pm -
Nonstop2h 00m
Deal found 8/23![Alaska Airlines logo]()
$207
This American Airlines deal was found by Cheapflights users on 8/22. 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.
Thu 11/121:21 pm -
2 stops20h 18m
Mon 11/161:23 pm -
2 stops22h 16m
Deal found 8/22![American Airlines logo]()
$454
This Alaska Airlines deal was found by Cheapflights users on 8/20. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/282:51 pm -
Nonstop2h 11m
Wed 11/114:06 pm -
Nonstop2h 00m
Deal found 8/20![Alaska Airlines logo]()
$207
This Alaska Airlines deal was found by Cheapflights users on 8/20. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/226:23 am -
1 stop5h 53m
Sat 9/264:50 pm -
Nonstop1h 55m
Deal found 8/20![Alaska Airlines logo]()
$217
This Alaska Airlines deal was found by Cheapflights users on 8/23. Clicking the “Pick Dates” 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 11/62:08 pm -
Nonstop2h 16m
Sun 11/154:04 pm -
Nonstop2h 00m
Deal found 8/23![Alaska Airlines logo]()
$217
This Alaska Airlines deal was found by Cheapflights users on 8/23. Clicking the “Pick Dates” 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 10/224:54 pm -
Nonstop2h 11m
Sun 10/256:02 am -
1 stop5h 33m
Deal found 8/23![Alaska Airlines logo]()
$227
This Delta deal was found by Cheapflights users on 8/20. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/35:14 pm -
1 stop4h 50m
Sun 10/411:54 am -
1 stop6h 56m
Deal found 8/20![Delta logo]()
$375
This Priceline deal was found by Cheapflights users on 8/23. Clicking the “Pick Dates” 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.
Tue 9/226:00 am -
1 stop4h 51m
Tue 9/296:02 am -
1 stop5h 33m
Deal found 8/23![Alaska Airlines logo]()
$237
This United Airlines deal was found by Cheapflights users on 8/23. Clicking the “Pick Dates” 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 10/154:28 pm -
1 stop5h 30m
Mon 10/195:00 am -
1 stop6h 44m
Deal found 8/23![United Airlines logo]()
$427
This Delta deal was found by Cheapflights users on 8/23. Clicking the “Pick Dates” 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 9/265:24 am -
1 stop6h 50m
Sun 9/276:00 am -
1 stop6h 20m
Deal found 8/23![Delta logo]()
$389
This Alaska Airlines deal was found by Cheapflights users on 8/19. 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 10/264:54 pm -
Nonstop2h 11m
Wed 10/284:42 pm -
Nonstop2h 01m
Deal found 8/19![Alaska Airlines logo]()
$267
This Delta deal was found by Cheapflights users on 8/23. Clicking the “Pick Dates” 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 9/245:55 pm -
1 stop6h 52m
Sun 9/271:04 pm -
1 stop5h 17m
Deal found 8/23![Delta logo]()
$399
This United Airlines deal was found by Cheapflights users on 8/20. 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.
Thu 9/104:25 pm -
1 stop5h 28m
Sun 9/139:01 am -
1 stop6h 38m
Deal found 8/20![United Airlines logo]()
$479
This Delta deal was found by Cheapflights users on 8/22. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/66:56 pm -
1 stop5h 59m
Sat 10/105:03 pm -
1 stop4h 07m
Deal found 8/22![Delta logo]()
$433
This United Airlines deal was found by Cheapflights users on 8/23. Clicking the “Pick Dates” 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 10/164:28 pm -
1 stop5h 30m
Sun 10/185:00 am -
1 stop6h 44m
Deal found 8/23![United Airlines logo]()
$479
This Delta deal was found by Cheapflights users on 8/22. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/96:59 pm -
1 stop5h 59m
Sat 12/126:00 am -
1 stop5h 17m
Deal found 8/22![Delta logo]()
$433
This United Airlines deal was found by Cheapflights users on 8/19. 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.
Sun 11/224:10 pm -
1 stop5h 41m
Tue 12/16:00 am -
1 stop6h 57m
Deal found 8/19![United Airlines logo]()
$479
This Alaska Airlines deal was found by Cheapflights users on 8/22. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/173:18 pm -
1 stop6h 31m
Wed 11/1810:40 am -
1 stop5h 03m
Deal found 8/22![Alaska Airlines logo]()
$339
This United Airlines deal was found by Cheapflights users on 8/23. Clicking the “Pick Dates” 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 9/104:25 pm -
1 stop5h 28m
Sat 9/121:18 pm -
1 stop6h 22m
Deal found 8/23![United Airlines logo]()
$479
This Delta deal was found by Cheapflights users on 8/23. Clicking the “Pick Dates” 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 10/96:00 am -
1 stop3h 55m
Wed 10/215:03 pm -
1 stop4h 07m
Deal found 8/23![Delta logo]()
$469
This United Airlines deal was found by Cheapflights users on 8/19. 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 11/34:10 pm -
1 stop5h 41m
Sat 11/75:00 am -
1 stop7h 25m
Deal found 8/19![United Airlines logo]()
$479
This Alaska Airlines deal was found by Cheapflights users on 8/21. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/81:41 pm -
1 stop4h 36m
Wed 11/117:15 am -
1 stop4h 30m
Deal found 8/21![Alaska Airlines logo]()
$375
This United Airlines deal was found by Cheapflights users on 8/21. 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.
Sat 12/123:30 pm -
1 stop5h 59m
Tue 12/155:00 am -
1 stop7h 29m
Deal found 8/21![United Airlines logo]()
$479
This Delta deal was found by Cheapflights users on 8/23. Clicking the “Pick Dates” 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 10/96:00 am -
1 stop3h 55m
Sun 10/186:00 am -
1 stop15h 10m
Deal found 8/23![Delta logo]()
$496
This Booking.com deal was found by Cheapflights users on 8/21. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/284:41 pm -
1 stop17h 36m
Sun 11/17:13 pm -
1 stop4h 46m
Deal found 8/21![Alaska Airlines logo]()
$375
This United Airlines deal was found by Cheapflights users on 8/23. Clicking the “Pick Dates” 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 10/155:35 pm -
1 stop6h 16m
Sun 10/189:25 am -
1 stop6h 14m
Deal found 8/23![United Airlines logo]()
$479
Last-minute flights from Idaho to OntarioDiscover last-minute flight deals from Idaho to Ontario. Data last updated August 24, 2026 and is based on user searches.
Discover last-minute flight deals from Idaho to Ontario. Data last updated August 24, 2026 and is based on user searches.
This Frontier deal was found by Cheapflights users on 8/19. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/251:24 pm -
1 stop11h 26m
Tue 9/16:00 am -
1 stop5h 29m
Deal found 8/19![Frontier logo]()
$154
This CheapOair deal was found by Cheapflights users on 8/21. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/251:24 pm -
1 stop21h 40m
Wed 8/267:56 pm -
1 stop14h 33m
Deal found 8/21![Frontier logo]()
$204
This Kiwi.com deal was found by Cheapflights users on 8/19. 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 8/2712:24 pm -
1 stop12h 26m
Sat 8/297:56 pm -
1 stop14h 33m
Deal found 8/19![Frontier logo]()
$192
This Frontier deal was found by Cheapflights users on 8/19. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/3012:24 pm -
1 stop12h 26m
Wed 9/27:56 pm -
1 stop14h 33m
Deal found 8/19![Frontier logo]()
$170
This Trip.com deal was found by Cheapflights users on 8/19. 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.
Sun 8/3012:24 pm -
1 stop12h 26m
Tue 9/16:00 am -
1 stop5h 29m
Deal found 8/19![Frontier logo]()
$202
This Frontier deal was found by Cheapflights users on 8/19. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/81:24 pm -
1 stop11h 26m
Thu 9/108:00 am -
1 stop4h 55m
Deal found 8/19![Frontier logo]()
$169
This Kiwi.com deal was found by Cheapflights users on 8/19. 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 9/81:24 pm -
1 stop11h 26m
Wed 9/162:30 pm -
1 stop22h 25m
Deal found 8/19![Frontier logo]()
$181
This Frontier deal was found by Cheapflights users on 8/19. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/81:24 pm -
1 stop11h 26m
Mon 9/148:00 am -
1 stop4h 55m
Deal found 8/19![Frontier logo]()
$199
This Priceline deal was found by Cheapflights users on 8/19. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/193:02 pm -
Nonstop2h 08m
Wed 9/234:50 pm -
Nonstop1h 55m
Deal found 8/19![Alaska Airlines logo]()
$197
This Booking.com deal was found by Cheapflights users on 8/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/1910:36 am -
1 stop5h 34m
Sat 9/267:12 am -
1 stop4h 36m
Deal found 8/23![Alaska Airlines logo]()
$339
This Alaska Airlines deal was found by Cheapflights users on 8/19. 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.
Sat 9/263:02 pm -
Nonstop2h 08m
Tue 9/294:50 pm -
Nonstop1h 55m
Deal found 8/19![Alaska Airlines logo]()
$207
This Booking.com deal was found by Cheapflights users on 8/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/303:02 pm -
Nonstop2h 08m
Wed 10/74:42 pm -
Nonstop2h 01m
Deal found 8/23![Alaska Airlines logo]()
$201
One-way flights from Idaho to OntarioSearch for one-way flight options from Idaho to Ontario. Find affordable one-way fares based on user searches. Data last updated August 24, 2026.
Search for one-way flight options from Idaho to Ontario. Find affordable one-way fares based on user searches. Data last updated August 24, 2026.
This Frontier deal was found by Cheapflights users on 8/19. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/303:52 pm -
1 stop5h 56m
Deal found 8/19![Frontier logo]()
$92
This Frontier deal was found by Cheapflights users on 8/19. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/312:24 pm -
1 stop12h 26m
Deal found 8/19![Frontier logo]()
$98
This CheapOair deal was found by Cheapflights users on 8/19. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/252:50 pm -
1 stop17h 14m
Deal found 8/19![Frontier logo]()
$100
This Super.com deal was found by Cheapflights users on 8/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/11:24 pm -
1 stop11h 26m
Deal found 8/23![Frontier logo]()
$101
This CheapOair deal was found by Cheapflights users on 8/19. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/112:50 pm -
1 stop21h 26m
Deal found 8/19![Frontier logo]()
$103
This American Airlines deal was found by Cheapflights users on 8/22. 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.
Wed 10/142:02 pm -
1 stop5h 41m
Deal found 8/22![American Airlines logo]()
$104
This Southwest deal was found by Cheapflights users on 8/22. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/201:25 pm -
2 stops8h 55m
Deal found 8/22![Southwest logo]()
$109
This Delta deal was found by Cheapflights users on 8/21. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/2611:03 am -
1 stop6h 32m
Deal found 8/21![Delta logo]()
$114
This Super.com deal was found by Cheapflights users on 8/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/3012:24 pm -
1 stop22h 40m
Deal found 8/23![Frontier logo]()
$116
This Super.com deal was found by Cheapflights users on 8/20. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/612:24 pm -
1 stop12h 26m
Deal found 8/20![Frontier logo]()
$117
This Frontier deal was found by Cheapflights users on 8/23. Clicking the “Pick Dates” 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.
Sun 11/2211:13 pm -
1 stop8h 07m
Deal found 8/23![Frontier logo]()
$118
This Booking.com deal was found by Cheapflights users on 8/20. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/286:43 am -
1 stop7h 33m
Deal found 8/20![Alaska Airlines logo]()
$119
Find flight deals from Idaho to Ontario
Keep the following information in mind while searching for Idaho to Ontario flight deals. Data was last updated August 24, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $169 (Frontier) |
One-way from | $92 (Frontier) |
Popular in | July |
Cheapest in | October |
Average price | $322 |
Good round-trip deal | $207 or less |
Good one-way deal | $251 or less |
Cheapflights Fare Finder
Customize your flight search to find flights from Idaho 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 August 24, 2026.
Use the filters below to find and compare flights from Idaho to Ontario that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
BoiseOntario
BOI Boise Air Term. Gowen Fld - ONT Ontario
BOIONT
Boise Air Term. Gowen Fld
Fri 11/6
2:08 pm-3:24 pm
Nonstop2h 16m
Ontario
Sat 11/14
4:04 pm-7:04 pm
Nonstop2h 00m
$207
Quickest round-trip
BoiseOntario
BOI Boise Air Term. Gowen Fld - ONT Ontario
BOIONT
Boise Air Term. Gowen Fld
Fri 10/30
4:54 pm-6:05 pm
Nonstop2h 11m
Ontario
Tue 11/3
4:06 pm-7:06 pm
Nonstop2h 00m
$207
BoiseOntario
BOI Boise Air Term. Gowen Fld - ONT Ontario
BOIONT
Boise Air Term. Gowen Fld
Wed 10/28
2:51 pm-4:02 pm
Nonstop2h 11m
Ontario
Wed 11/11
4:06 pm-7:06 pm
Nonstop2h 00m
$207
BoiseOntario
BOI Boise Air Term. Gowen Fld - ONT Ontario
BOIONT
Boise Air Term. Gowen Fld
Tue 9/22
6:23 am-11:16 am
1 stop5h 53m
Ontario
Sat 9/26
4:50 pm-7:45 pm
Nonstop1h 55m
$217
BoiseOntario
BOI Boise Air Term. Gowen Fld - ONT Ontario
BOIONT
Boise Air Term. Gowen Fld
Fri 11/6
2:08 pm-3:24 pm
Nonstop2h 16m
Ontario
Sun 11/15
4:04 pm-7:04 pm
Nonstop2h 00m
$217
BoiseOntario
BOI Boise Air Term. Gowen Fld - ONT Ontario
BOIONT
Boise Air Term. Gowen Fld
Thu 10/22
4:54 pm-6:05 pm
Nonstop2h 11m
Ontario
Sun 10/25
6:02 am-12:35 pm
1 stop5h 33m
$227
BoiseOntario
BOI Boise Air Term. Gowen Fld - ONT Ontario
BOIONT
Boise Air Term. Gowen Fld
Tue 9/22
6:00 am-9:51 am
1 stop4h 51m
Ontario
Tue 9/29
6:02 am-12:35 pm
1 stop5h 33m
$237
BoiseOntario
BOI Boise Air Term. Gowen Fld - ONT Ontario
BOIONT
Boise Air Term. Gowen Fld
Mon 10/26
4:54 pm-6:05 pm
Nonstop2h 11m
Ontario
Wed 10/28
4:42 pm-7:43 pm
Nonstop2h 01m
$267
SpokaneOntario
GEG Spokane - ONT Ontario
GEGONT
Spokane
Mon 11/23
5:00 am-11:17 am
1 stop6h 17m
Ontario
Mon 11/23
5:59 pm-10:44 pm
1 stop4h 45m
$339
SpokaneOntario
GEG Spokane - ONT Ontario
GEGONT
Spokane
Tue 11/17
3:18 pm-9:49 pm
1 stop6h 31m
Ontario
Wed 11/18
10:40 am-3:43 pm
1 stop5h 03m
$339
Showing 1-10 of 60 resultsSorted by cheapest first
Best time to book a flight from Idaho to Ontario
Have a flexible travel schedule? Discover the best time to fly to Ontario from Idaho with our price prediction graph.
BOI-ONT
IDA-ONT
GEG-ONT
JAC-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 from Idaho to Ontario
USID-ONT
BOI-ONT
IDA-ONT
GEG-ONT
JAC-ONT
What is the cheapest month to book a flight from Idaho to Ontario?
Currently, April is the cheapest month in which you can book a flight from Idaho to Ontario (average of $262). Flying from Idaho to Ontario in December is currently the most expensive (average of $565). 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 ID to ONT?
Find hourly flight availability from Idaho 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 August 24, 2026.
When flying from Idaho to Ontario, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.
Weekly flight availability from Idaho to Ontario
Explore weekly flight availability from Idaho 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 August 24, 2026.
The most flights from USID to ONT are scheduled on a Monday (2 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (1 on average).
How much does it cost to fly round-trip from Idaho to Ontario?
Airfare is below average for this route at the moment.
Idaho to Ontario flights typically cost between $256 and $303 in September.The cheapest round-trip price found within the last 5 days was $169 on Frontier (Sep 8-Sep 10).
How far ahead should I book a flight from Idaho to Ontario?
To ensure you get the cheapest price possible for a flight from Idaho to Ontario, you should look to book at least 34 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.
Related info for your journey
Find useful and relevant information for your journey from Idaho to Ontario. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
Browse thousands of different options on Cheapflights for your next trip
Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.
Alternative routes
Complete your trip
Flights by cabin class
Ontario flight routes
Other flight options
Popular flights
Top destinations
Alternative routes for Idaho 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 Idaho to Ontario by cabin class
Find flights from Idaho to Ontario, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Other flights to Ontario
Explore flights to Ontario departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on August 24, 2026.
Idaho and Ontario flights
Browse other Idaho and Ontario flight options. Last updated on August 24, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Idaho to Ontario flights
Consider these flights traveling from Idaho to Ontario.
Top 5 airlines flying from Idaho to Ontario
Discover the top 5 airlines that operate flights from Idaho 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 August 24, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$136 | Average$353 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$137 | Average$280 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$143 | Average$436 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$170 | Average$243 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$204 | Average$379 | FlexibilityNo cancel fee | On-time63% |