$115+ Cheap flights from Ontario (ONT) to Idaho
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 8/19. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — BOI
Jun 24 — Jul 11
Round-trip
1 adult, Economy
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Find cheap flights from Ontario to Idaho with Cheapflights
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Cheapest flights from Ontario to IdahoExplore the most affordable flight options available from Ontario to Idaho. Find the lowest fares from popular airlines and budget airlines, with prices last updated on May 25, 2026.
Explore the most affordable flight options available from Ontario to Idaho. Find the lowest fares from popular airlines and budget airlines, with prices last updated on May 25, 2026.
This Alaska Airlines deal was found by Cheapflights users on 5/20. 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.
Sat 8/224:50 pm
ONT
- BOI
Nonstop1h 55m
Alaska Airlines
Fri 8/283:02 pm
BOI
- ONT
Nonstop2h 08m
Alaska Airlines
Deal found 5/20![Alaska Airlines logo]()
$197
This deal was found by Cheapflights users on 5/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/284:50 pm
ONT
- BOI
Nonstop1h 55m
Alaska Airlines
Mon 8/313:02 pm
BOI
- ONT
Nonstop2h 08m
Alaska Airlines
Deal found 5/24![Alaska Airlines logo]()
$207
This Alaska Airlines deal was found by Cheapflights users on 5/20. 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.
Sat 10/314:42 pm
ONT
- BOI
Nonstop2h 00m
Alaska Airlines
Sun 11/14:48 pm
BOI
- ONT
Nonstop2h 03m
Alaska Airlines
Deal found 5/20![Alaska Airlines logo]()
$217
This Frontier deal was found by Cheapflights users on 5/24. Clicking the “Pick Dates” 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.
Wed 6/176:00 am
ONT
- GEG
1 stop5h 36m
Frontier
Wed 6/2412:31 pm
GEG
- ONT
1 stop11h 18m
Frontier
Deal found 5/24![Frontier logo]()
$230
This Frontier deal was found by Cheapflights users on 5/25. Clicking the “Pick Dates” 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.
Wed 6/246:00 am
ONT
- GEG
1 stop5h 36m
Frontier
Fri 7/312:31 pm
GEG
- ONT
1 stop11h 18m
Frontier
Deal found 5/25![Frontier logo]()
$236
This Frontier deal was found by Cheapflights users on 5/25. Clicking the “Pick Dates” 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.
Mon 6/226:00 am
ONT
- GEG
1 stop5h 36m
Frontier
Mon 6/2912:31 pm
GEG
- ONT
1 stop11h 18m
Frontier
Deal found 5/25![Frontier logo]()
$242
This Southwest deal was found by Cheapflights users on 5/25. Clicking the “Pick Dates” 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 8/255:45 am
ONT
- BOI
2 stops6h 55m
Southwest
Tue 9/17:05 am
BOI
- ONT
1 stop4h 20m
Southwest
Deal found 5/25![Southwest logo]()
$242
This Mytrip deal was found by Cheapflights users on 5/20. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/136:00 am
ONT
- GEG
1 stop5h 37m
Frontier
Wed 7/1512:34 pm
GEG
- ONT
1 stop21h 29m
Frontier
Deal found 5/20![Frontier logo]()
$245
This Gotogate deal was found by Cheapflights users on 5/23. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/2010:50 am
ONT
- GEG
1 stop24h 43m
Frontier
Mon 8/2412:28 pm
GEG
- ONT
1 stop11h 21m
Frontier
Deal found 5/23![Frontier logo]()
$252
This Alaska Airlines deal was found by Cheapflights users on 5/22. 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 8/184:18 pm
ONT
- BOI
Nonstop1h 55m
Alaska Airlines
Tue 8/253:02 pm
BOI
- ONT
Nonstop2h 08m
Alaska Airlines
Deal found 5/22![Alaska Airlines logo]()
$252
This Kiwi.com deal was found by Cheapflights users on 5/21. 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.
Thu 9/33:34 pm
ONT
- IDA
1 stop16h 20m
Multiple Airlines
Mon 9/78:36 pm
IDA
- ONT
1 stop24h 12m
Multiple Airlines
Deal found 5/21![Multiple Airlines logo]()
$254
This Alaska Airlines deal was found by Cheapflights users on 5/20. 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 9/14:50 pm
ONT
- BOI
Nonstop1h 55m
Alaska Airlines
Wed 9/26:23 am
BOI
- ONT
1 stop5h 41m
Alaska Airlines
Deal found 5/20![Alaska Airlines logo]()
$257
Best flights from Ontario to IdahoDiscover carefully curated flight deals from Ontario to Idaho that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated May 25, 2026.
Discover carefully curated flight deals from Ontario to Idaho that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated May 25, 2026.
This Alaska Airlines deal was found by Cheapflights users on 5/22. 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 8/184:18 pm
ONT
- BOI
Nonstop1h 55m
Alaska Airlines
Tue 8/253:02 pm
BOI
- ONT
Nonstop2h 08m
Alaska Airlines
Deal found 5/22![Alaska Airlines logo]()
$252
This Delta deal was found by Cheapflights users on 5/22. 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 6/166:00 am
ONT
- WYS
1 stop5h 28m
Delta
Tue 6/231:10 pm
WYS
- ONT
2 stops10h 31m
Delta
Deal found 5/22![Delta logo]()
$304
This United Airlines deal was found by Cheapflights users on 5/25. Clicking the “Pick Dates” 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 6/91:50 pm
ONT
- SUN
1 stop7h 01m
United Airlines
Sat 6/138:00 am
SUN
- ONT
1 stop5h 12m
United Airlines
Deal found 5/25![United Airlines logo]()
$329
This Southwest deal was found by Cheapflights users on 5/23. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/258:45 pm
ONT
- BOI
1 stop4h 00m
Southwest
Mon 6/295:10 am
BOI
- ONT
1 stop4h 55m
Southwest
Deal found 5/23![Southwest logo]()
$337
This Alaska Airlines deal was found by Cheapflights users on 5/22. 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.
Sat 8/223:07 pm
ONT
- BOI
1 stop6h 26m
Alaska Airlines
Mon 8/246:23 am
BOI
- ONT
1 stop5h 41m
Alaska Airlines
Deal found 5/22![Alaska Airlines logo]()
$277
This Alaska Airlines deal was found by Cheapflights users on 5/24. Clicking the “Pick Dates” 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 7/224:18 pm
ONT
- BOI
Nonstop1h 55m
Alaska Airlines
Thu 8/62:31 pm
BOI
- ONT
Nonstop2h 07m
Alaska Airlines
Deal found 5/24![Alaska Airlines logo]()
$287
This Delta deal was found by Cheapflights users on 5/23. 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.
Tue 8/1812:55 pm
ONT
- JAC
1 stop5h 00m
Delta
Sat 8/226:01 pm
JAC
- ONT
1 stop5h 22m
Delta
Deal found 5/23![Delta logo]()
$329
This Delta deal was found by Cheapflights users on 5/20. 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.
Thu 7/309:40 am
ONT
- JAC
1 stop6h 20m
Delta
Fri 8/146:01 pm
JAC
- ONT
1 stop6h 33m
Delta
Deal found 5/20![Delta logo]()
$329
This United Airlines deal was found by Cheapflights users on 5/22. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/181:56 pm
ONT
- SUN
1 stop6h 48m
United Airlines
Tue 9/222:29 pm
SUN
- ONT
1 stop7h 24m
United Airlines
Deal found 5/22![United Airlines logo]()
$369
This Southwest deal was found by Cheapflights users on 5/24. Clicking the “Pick Dates” 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 6/167:20 pm
ONT
- BOI
1 stop4h 10m
Southwest
Fri 6/194:25 pm
BOI
- ONT
2 stops8h 05m
Southwest
Deal found 5/24![Southwest logo]()
$382
This Alaska Airlines deal was found by Cheapflights users on 5/20. 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.
Thu 8/66:02 am
ONT
- BOI
1 stop7h 05m
Alaska Airlines
Sun 8/92:31 pm
BOI
- ONT
Nonstop2h 07m
Alaska Airlines
Deal found 5/20![Alaska Airlines logo]()
$327
This Delta deal was found by Cheapflights users on 5/21. 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.
Mon 6/86:00 am
ONT
- JAC
1 stop5h 16m
Delta
Mon 6/156:05 pm
JAC
- ONT
1 stop6h 44m
Delta
Deal found 5/21![Delta logo]()
$329
This United Airlines deal was found by Cheapflights users on 5/25. Clicking the “Pick Dates” 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 6/191:18 pm
ONT
- SUN
1 stop7h 08m
United Airlines
Sun 6/218:00 am
SUN
- ONT
1 stop5h 12m
United Airlines
Deal found 5/25![United Airlines logo]()
$369
This Southwest deal was found by Cheapflights users on 5/24. Clicking the “Pick Dates” 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 7/115:30 am
ONT
- GEG
1 stop4h 45m
Southwest
Wed 7/155:00 am
GEG
- ONT
2 stops7h 25m
Southwest
Deal found 5/24![Southwest logo]()
$386
This Alaska Airlines deal was found by Cheapflights users on 5/20. 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 6/234:18 pm
ONT
- BOI
Nonstop1h 55m
Alaska Airlines
Mon 6/292:31 pm
BOI
- ONT
Nonstop2h 07m
Alaska Airlines
Deal found 5/20![Alaska Airlines logo]()
$342
This Southwest deal was found by Cheapflights users on 5/24. Clicking the “Pick Dates” 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 7/144:35 pm
ONT
- GEG
1 stop7h 35m
Southwest
Sat 7/185:00 am
GEG
- ONT
2 stops7h 45m
Southwest
Deal found 5/24![Southwest logo]()
$386
This Delta deal was found by Cheapflights users on 5/25. Clicking the “Pick Dates” 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 7/96:00 am
ONT
- GEG
1 stop6h 12m
Delta
Mon 7/1311:30 am
GEG
- ONT
1 stop5h 51m
Delta
Deal found 5/25![Delta logo]()
$361
This Southwest deal was found by Cheapflights users on 5/23. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/264:40 pm
ONT
- GEG
2 stops6h 55m
Southwest
Wed 7/15:00 am
GEG
- ONT
2 stops7h 55m
Southwest
Deal found 5/23![Southwest logo]()
$391
This Alaska Airlines deal was found by Cheapflights users on 5/25. Clicking the “Pick Dates” 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 6/3010:54 am
ONT
- BOI
1 stop5h 22m
Alaska Airlines
Tue 8/42:31 pm
BOI
- ONT
Nonstop2h 07m
Alaska Airlines
Deal found 5/25![Alaska Airlines logo]()
$357
This Delta deal was found by Cheapflights users on 5/20. 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.
Sun 8/29:40 am
ONT
- JAC
1 stop6h 20m
Delta
Sat 8/86:01 pm
JAC
- ONT
1 stop5h 04m
Delta
Deal found 5/20![Delta logo]()
$364
This United Airlines deal was found by Cheapflights users on 5/23. 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.
Sat 6/135:00 am
ONT
- WYS
1 stop7h 32m
United Airlines
Fri 6/192:19 pm
WYS
- ONT
1 stop7h 27m
United Airlines
Deal found 5/23![United Airlines logo]()
$449
This Alaska Airlines deal was found by Cheapflights users on 5/20. 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 6/246:02 am
ONT
- BOI
1 stop5h 45m
Alaska Airlines
Sun 6/282:31 pm
BOI
- ONT
Nonstop2h 07m
Alaska Airlines
Deal found 5/20![Alaska Airlines logo]()
$357
This Southwest deal was found by Cheapflights users on 5/24. Clicking the “Pick Dates” 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.
Fri 8/218:30 am
ONT
- GEG
2 stops8h 25m
Southwest
Thu 8/276:55 am
GEG
- ONT
1 stop4h 30m
Southwest
Deal found 5/24![Southwest logo]()
$399
This Delta deal was found by Cheapflights users on 5/23. 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.
Mon 8/246:00 am
ONT
- JAC
1 stop3h 50m
Delta
Mon 8/316:01 pm
JAC
- ONT
1 stop5h 22m
Delta
Deal found 5/23![Delta logo]()
$364
This Alaska Airlines deal was found by Cheapflights users on 5/23. 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.
Tue 8/184:18 pm
ONT
- GEG
1 stop5h 15m
Alaska Airlines
Wed 8/195:52 am
GEG
- ONT
1 stop5h 12m
Alaska Airlines
Deal found 5/23![Alaska Airlines logo]()
$359
This United Airlines deal was found by Cheapflights users on 5/22. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/35:00 am
ONT
- WYS
1 stop7h 20m
United Airlines
Fri 10/92:02 pm
WYS
- ONT
1 stop23h 39m
United Airlines
Deal found 5/22![United Airlines logo]()
$481
This Southwest deal was found by Cheapflights users on 5/23. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 6/147:00 pm
ONT
- GEG
1 stop5h 45m
Southwest
Thu 6/186:05 pm
GEG
- ONT
1 stop6h 00m
Southwest
Deal found 5/23![Southwest logo]()
$402
This Delta deal was found by Cheapflights users on 5/21. 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 6/65:55 pm
ONT
- IDA
1 stop3h 47m
Delta
Tue 6/166:00 am
IDA
- ONT
1 stop3h 50m
Delta
Deal found 5/21![Delta logo]()
$386
This Alaska Airlines deal was found by Cheapflights users on 5/23. 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.
Wed 7/152:05 pm
ONT
- GEG
1 stop6h 51m
Alaska Airlines
Tue 7/218:53 am
GEG
- ONT
1 stop6h 45m
Alaska Airlines
Deal found 5/23![Alaska Airlines logo]()
$361
This United Airlines deal was found by Cheapflights users on 5/22. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/195:00 am
ONT
- WYS
1 stop7h 32m
United Airlines
Tue 6/232:19 pm
WYS
- ONT
1 stop23h 28m
United Airlines
Deal found 5/22![United Airlines logo]()
$499
Last-minute flights from Ontario to IdahoDiscover last-minute flight deals from Ontario to Idaho. Data last updated May 25, 2026 and is based on user searches.
Discover last-minute flight deals from Ontario to Idaho. Data last updated May 25, 2026 and is based on user searches.
This CheapOair deal was found by Cheapflights users on 5/21. 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.
Wed 6/106:00 am
ONT
- GEG
1 stop5h 36m
Frontier
Wed 6/1712:31 pm
GEG
- ONT
1 stop21h 34m
Frontier
Deal found 5/21![Frontier logo]()
$266
This Delta deal was found by Cheapflights users on 5/22. 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 6/166:00 am
ONT
- WYS
1 stop5h 28m
Delta
Tue 6/231:10 pm
WYS
- ONT
2 stops10h 31m
Delta
Deal found 5/22![Delta logo]()
$304
This Frontier deal was found by Cheapflights users on 5/24. Clicking the “Pick Dates” 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.
Wed 6/176:00 am
ONT
- GEG
1 stop5h 36m
Frontier
Wed 6/2412:31 pm
GEG
- ONT
1 stop11h 18m
Frontier
Deal found 5/24![Frontier logo]()
$230
This Expedia deal was found by Cheapflights users on 5/21. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/186:00 am
ONT
- BOI
1 stop5h 30m
Frontier
Thu 6/251:25 pm
BOI
- ONT
1 stop11h 24m
Frontier
Deal found 5/21![Frontier logo]()
$294
This Alaska Airlines deal was found by Cheapflights users on 5/23. 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.
Sat 6/204:18 pm
ONT
- BOI
Nonstop1h 55m
Alaska Airlines
Fri 6/262:31 pm
BOI
- ONT
Nonstop2h 07m
Alaska Airlines
Deal found 5/23![Alaska Airlines logo]()
$287
This Frontier deal was found by Cheapflights users on 5/25. Clicking the “Pick Dates” 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.
Mon 6/226:00 am
ONT
- GEG
1 stop5h 36m
Frontier
Mon 6/2912:31 pm
GEG
- ONT
1 stop11h 18m
Frontier
Deal found 5/25![Frontier logo]()
$242
This Frontier deal was found by Cheapflights users on 5/25. Clicking the “Pick Dates” 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.
Mon 6/226:00 am
ONT
- GEG
1 stop5h 36m
Frontier
Wed 7/112:31 pm
GEG
- ONT
1 stop11h 18m
Frontier
Deal found 5/25![Frontier logo]()
$272
This Frontier deal was found by Cheapflights users on 5/22. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/236:00 am
ONT
- BOI
1 stop5h 30m
Frontier
Tue 6/301:25 pm
BOI
- ONT
1 stop11h 24m
Frontier
Deal found 5/22![Frontier logo]()
$258
This Frontier deal was found by Cheapflights users on 5/25. Clicking the “Pick Dates” 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.
Wed 6/246:00 am
ONT
- GEG
1 stop5h 36m
Frontier
Fri 7/312:31 pm
GEG
- ONT
1 stop11h 18m
Frontier
Deal found 5/25![Frontier logo]()
$236
This Expedia deal was found by Cheapflights users on 5/21. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/246:00 am
ONT
- GEG
1 stop5h 36m
Frontier
Mon 6/2912:31 pm
GEG
- ONT
1 stop21h 34m
Frontier
Deal found 5/21![Frontier logo]()
$302
This Frontier deal was found by Cheapflights users on 5/20. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/256:00 am
ONT
- BOI
1 stop5h 30m
Frontier
Tue 6/301:25 pm
BOI
- ONT
1 stop11h 24m
Frontier
Deal found 5/20![Frontier logo]()
$289
This Booking.com deal was found by Cheapflights users on 5/24. Clicking the “Pick Dates” 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.
Tue 6/306:00 am
ONT
- BOI
1 stop5h 30m
Frontier
Tue 7/71:24 pm
BOI
- ONT
1 stop21h 40m
Frontier
Deal found 5/24![Frontier logo]()
$270
One-way flights from Ontario to IdahoSearch for one-way flight options from Ontario to Idaho. Find affordable one-way fares based on user searches. Data last updated May 25, 2026.
Search for one-way flight options from Ontario to Idaho. Find affordable one-way fares based on user searches. Data last updated May 25, 2026.
This Frontier deal was found by Cheapflights users on 5/23. 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.
Wed 8/196:00 am
ONT
- GEG
1 stop5h 33m
Frontier
Deal found 5/23![Frontier logo]()
$115
This Alaska Airlines deal was found by Cheapflights users on 5/20. 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 8/264:50 pm
ONT
- BOI
Nonstop1h 55m
Alaska Airlines
Deal found 5/20![Alaska Airlines logo]()
$119
This Frontier deal was found by Cheapflights users on 5/23. 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.
Fri 8/216:00 am
ONT
- GEG
1 stop5h 33m
Frontier
Deal found 5/23![Frontier logo]()
$121
This CheapOair deal was found by Cheapflights users on 5/24. Clicking the “Pick Dates” 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 8/1810:50 am
ONT
- GEG
1 stop24h 43m
Frontier
Deal found 5/24![Frontier logo]()
$126
This Frontier deal was found by Cheapflights users on 5/24. Clicking the “Pick Dates” 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 8/186:00 am
ONT
- BOI
1 stop5h 09m
Frontier
Deal found 5/24![Frontier logo]()
$129
This CheapOair deal was found by Cheapflights users on 5/24. Clicking the “Pick Dates” 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 6/2310:50 am
ONT
- GEG
1 stop24h 46m
Frontier
Deal found 5/24![Frontier logo]()
$132
This Frontier deal was found by Cheapflights users on 5/24. Clicking the “Pick Dates” 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 7/26:00 am
ONT
- BOI
1 stop5h 30m
Frontier
Deal found 5/24![Frontier logo]()
$134
This Frontier deal was found by Cheapflights users on 5/21. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/106:00 am
ONT
- GEG
1 stop5h 36m
Frontier
Deal found 5/21![Frontier logo]()
$135
This Alaska Airlines deal was found by Cheapflights users on 5/20. 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 11/45:12 pm
ONT
- BOI
Nonstop2h 00m
Alaska Airlines
Deal found 5/20![Alaska Airlines logo]()
$139
This Booking.com deal was found by Cheapflights users on 5/24. Clicking the “Pick Dates” 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 7/1110:49 am
ONT
- BOI
1 stop24h 40m
Frontier
Deal found 5/24![Frontier logo]()
$140
This CheapOair deal was found by Cheapflights users on 5/20. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/510:49 am
ONT
- GEG
1 stop24h 48m
Frontier
Deal found 5/20![Frontier logo]()
$143
This Mytrip deal was found by Cheapflights users on 5/24. Clicking the “Pick Dates” 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.
Mon 7/610:49 am
ONT
- BOI
1 stop24h 40m
Frontier
Deal found 5/24![Frontier logo]()
$144
Find flight deals from Ontario to Idaho
Keep the following information in mind while searching for Ontario to Idaho flight deals. Data was last updated May 25, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $197 (Alaska Airlines) |
One-way from | $115 (Frontier) |
Popular in | February |
Cheapest in | April |
Average price | $297 |
Good round-trip deal | $347 or less |
Good one-way deal | $198 or less |
Cheapflights Fare Finder
Customize your flight search to find flights from Ontario to Idaho that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated May 25, 2026.
Use the filters below to find and compare flights from Ontario to Idaho that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
OntarioBoise
ONT - BOI
ONTBOI
Ontario
Tue 8/18
4:18 pm-7:13 pm
Nonstop1h 55m
Boise Air Term. Gowen Fld
Tue 8/25
3:02 pm-4:10 pm
Nonstop2h 08m
$252
OntarioBoise
ONT - BOI
ONTBOI
Ontario
Sat 8/22
3:07 pm-10:33 pm
1 stop6h 26m
Boise Air Term. Gowen Fld
Mon 8/24
6:23 am-11:04 am
1 stop5h 41m
$277
Quickest round-trip
OntarioBoise
ONT - BOI
ONTBOI
Ontario
Wed 7/22
4:18 pm-7:13 pm
Nonstop1h 55m
Boise Air Term. Gowen Fld
Thu 8/6
2:31 pm-3:38 pm
Nonstop2h 07m
$287
OntarioWest Yellowstone
ONT - WYS
ONTWYS
Ontario
Tue 6/16
6:00 am-12:28 pm
1 stop5h 28m
West Yellowstone
Tue 6/23
1:10 pm-10:41 pm
2 stops10h 31m
$304
OntarioBoise
ONT - BOI
ONTBOI
Ontario
Thu 8/6
6:02 am-2:07 pm
1 stop7h 05m
Boise Air Term. Gowen Fld
Sun 8/9
2:31 pm-3:38 pm
Nonstop2h 07m
$327
OntarioHailey
ONT - SUN
ONTSUN
Ontario
Tue 6/9
1:50 pm-9:51 pm
1 stop7h 01m
Hailey Sun Valley-Friedman
Sat 6/13
8:00 am-12:12 pm
1 stop5h 12m
$329
OntarioJackson
ONT - JAC
ONTJAC
Ontario
Tue 8/18
12:55 pm-6:55 pm
1 stop5h 00m
Jackson Hole
Sat 8/22
6:01 pm-10:23 pm
1 stop5h 22m
$329
OntarioJackson
ONT - JAC
ONTJAC
Ontario
Thu 7/30
9:40 am-5:00 pm
1 stop6h 20m
Jackson Hole
Fri 8/14
6:01 pm-11:34 pm
1 stop6h 33m
$329
OntarioJackson
ONT - JAC
ONTJAC
Ontario
Mon 6/8
6:00 am-12:16 pm
1 stop5h 16m
Jackson Hole
Mon 6/15
6:05 pm-11:49 pm
1 stop6h 44m
$329
OntarioBoise
ONT - BOI
ONTBOI
Ontario
Thu 6/25
8:45 pm-1:45 am
1 stop4h 00m
Boise Air Term. Gowen Fld
Mon 6/29
5:10 am-9:05 am
1 stop4h 55m
$337
Showing 1-10 of 60 resultsSorted by cheapest first
Best time to book a flight from Ontario to Idaho
Have a flexible travel schedule? Discover the best time to fly to Idaho from Ontario with our price prediction graph.
ONT-GEG
ONT-BOI
ONT-WYS
ONT-SUN
ONT-JAC
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 Ontario to Idaho
ONT-USID
ONT-GEG
ONT-BOI
ONT-WYS
ONT-SUN
What is the cheapest month to book a flight from Ontario to Idaho?
Currently, May is the cheapest month in which you can book a flight from Ontario to Idaho (average of $79). Flying from Ontario to Idaho in November is currently the most expensive (average of $196). 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 ONT to ID?
Find hourly flight availability from Ontario to Idaho. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated May 25, 2026.
A simple way to save on the total cost of your ticket is to fly from Ontario to Idaho at noon. If you’re flexible enough to do this you can expect to save up to 62% on your trip compared to booking a flight in the morning.
Weekly flight availability from Ontario to Idaho
Explore weekly flight availability from Ontario to Idaho. 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 May 25, 2026.
The most flights from ONT to USID are scheduled on a Monday (1 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (1 on average).
How much does it cost to fly round-trip from Ontario to Idaho?
How far ahead should I book a flight from Ontario to Idaho?
To ensure you get the cheapest price possible for a flight from Ontario to Idaho, you should look to book at least 73 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.
Reviews of airlines servicing Idaho
Get insights into the airlines that provide service to Idaho. 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 Idaho. Reviews last updated May 25, 2026.
See what other customers who have flown with Alaska Airlines,Southwest, andDelta from Ontario to Idaho have to say. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Food
7.0
Entertainment
7.0
Boarding
8.1
Crew
8.5
Comfort
7.8
Overall
7.9
Reviews
1 / 20
10.0
ExcellentFranzi,Mar 2026
SFO - PDX
Food
7.0
Entertainment
7.0
Boarding
8.1
Crew
8.5
Comfort
7.8
Overall
7.9
Reviews
1 / 20
10.0
ExcellentFranzi,Mar 2026
SFO - PDX
Food
7.0
Entertainment
7.0
Boarding
8.1
Crew
8.5
Comfort
7.8
Overall
7.9
Reviews
1 / 20
10.0
ExcellentFranzi,Mar 2026
SFO - PDX
Food
7.0
Entertainment
7.0
Boarding
8.1
Crew
8.5
Comfort
7.8
Overall
7.9
Reviews
1 / 20
10.0
ExcellentFranzi,Mar 2026
SFO - PDX
Food
7.0
Entertainment
7.0
Boarding
8.1
Crew
8.5
Comfort
7.8
Overall
7.9
Reviews
1 / 20
10.0
ExcellentFranzi,Mar 2026
SFO - PDX
Related info for your journey
Find useful and relevant information for your journey from Ontario to Idaho. 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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Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.
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Alternative routes for Ontario to Idaho
See prices for flight routes from nearby airports that may be better suited for you.
Complete your trip
Complete your trip to Idaho by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from Ontario to Idaho by cabin class
Find flights from Ontario to Idaho, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Ontario and Idaho flights
Browse other Ontario and Idaho flight options. Last updated on May 25, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Ontario to Idaho flights
Consider these flights traveling from Ontario to Idaho.
Top 4 airlines flying from Ontario to Idaho
Discover the top 4 airlines that operate flights from Ontario to Idaho. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated May 25, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$117 | Average$259 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$158 | Average$325 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$176 | Average$362 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$196 | Average$319 | FlexibilityNo cancel fee | On-time69% |