$70+ 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 5/10. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — BOI
maj 11 — maj 181
Round-trip
1 adult, Economy
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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 april 11, 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 april 11, 2026.
This Alaska Airlines deal was found by Cheapflights users on 4/7. Clicking the “Pick Dates” 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.
lør. 5/22:59 pm
ONT
- BOI
Nonstop2h 00m
Alaska Airlines
tir. 5/51:15 pm
BOI
- ONT
Nonstop2h 04m
Alaska Airlines
Deal found 4/7![Alaska Airlines logo]()
$137
This Expedia deal was found by Cheapflights users on 4/7. Clicking the “Pick Dates” 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.
lør. 5/212:59 am
ONT
- GEG
1 stop9h 50m
Frontier
fre. 5/812:33 pm
GEG
- ONT
1 stop21h 32m
Frontier
Deal found 4/7![Frontier logo]()
$140
This Alaska Airlines deal was found by Cheapflights users on 4/7. Clicking the “Pick Dates” 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.
lør. 5/22:59 pm
ONT
- BOI
Nonstop2h 00m
Alaska Airlines
tor. 5/71:15 pm
BOI
- ONT
Nonstop2h 04m
Alaska Airlines
Deal found 4/7![Alaska Airlines logo]()
$157
This Southwest deal was found by Cheapflights users on 4/9. Clicking the “Pick Dates” 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.
lør. 5/29:30 am
ONT
- BOI
1 stop5h 45m
Southwest
tir. 5/52:00 pm
BOI
- ONT
2 stops6h 40m
Southwest
Deal found 4/9![Southwest logo]()
$162
This Alaska Airlines deal was found by Cheapflights users on 4/7. Clicking the “Pick Dates” 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.
ons. 4/292:59 pm
ONT
- BOI
Nonstop2h 00m
Alaska Airlines
ons. 5/61:15 pm
BOI
- ONT
Nonstop2h 04m
Alaska Airlines
Deal found 4/7![Alaska Airlines logo]()
$167
This Kiwi.com deal was found by Cheapflights users on 4/10. Clicking the “Pick Dates” 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.
tor. 6/411:51 am
ONT
- GEG
1 stop8h 06m
Multiple Airlines
søn. 6/78:47 pm
GEG
- ONT
1 stop18h 22m
Multiple Airlines
Deal found 4/10![Multiple Airlines logo]()
$171
This Southwest deal was found by Cheapflights users on 4/6. Clicking the “Pick Dates” 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.
ons. 5/63:45 pm
ONT
- BOI
2 stops7h 40m
Southwest
ons. 5/135:00 pm
BOI
- ONT
1 stop4h 50m
Southwest
Deal found 4/6![Southwest logo]()
$172
This Alaska Airlines deal was found by Cheapflights users on 4/7. Clicking the “Pick Dates” 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.
fre. 5/12:59 pm
ONT
- BOI
Nonstop2h 00m
Alaska Airlines
tor. 5/71:15 pm
BOI
- ONT
Nonstop2h 04m
Alaska Airlines
Deal found 4/7![Alaska Airlines logo]()
$177
This Delta deal was found by Cheapflights users on 4/8. Clicking the “Pick Dates” 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.
lør. 5/22:20 pm
ONT
- BOI
1 stop6h 04m
Delta
søn. 5/35:40 am
BOI
- ONT
1 stop6h 33m
Delta
Deal found 4/8![Delta logo]()
$178
This Frontier deal was found by Cheapflights users on 4/10. Clicking the “Pick Dates” 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.
fre. 5/296:00 am
ONT
- GEG
1 stop5h 38m
Frontier
man. 6/112:33 pm
GEG
- ONT
1 stop11h 16m
Frontier
Deal found 4/10![Frontier logo]()
$180
This Southwest deal was found by Cheapflights users on 4/9. Clicking the “Pick Dates” 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.
tir. 6/23:45 pm
ONT
- BOI
2 stops7h 40m
Southwest
søn. 6/76:15 am
BOI
- ONT
1 stop3h 50m
Southwest
Deal found 4/9![Southwest logo]()
$182
This Alaska Airlines deal was found by Cheapflights users on 4/7. Clicking the “Pick Dates” 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.
fre. 5/12:59 pm
ONT
- BOI
Nonstop2h 00m
Alaska Airlines
lør. 5/21:15 pm
BOI
- ONT
Nonstop2h 04m
Alaska Airlines
Deal found 4/7![Alaska Airlines logo]()
$187
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 april 11, 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 april 11, 2026.
This Alaska Airlines deal was found by Cheapflights users on 4/9. Clicking the “Pick Dates” 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.
fre. 5/12:59 pm
ONT
- BOI
Nonstop2h 00m
Alaska Airlines
lør. 5/164:14 pm
BOI
- ONT
Nonstop2h 03m
Alaska Airlines
Deal found 4/9![Alaska Airlines logo]()
$157
This Southwest deal was found by Cheapflights users on 4/7. Clicking the “Pick Dates” 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.
ons. 5/63:45 pm
ONT
- BOI
2 stops7h 40m
Southwest
ons. 5/135:00 pm
BOI
- ONT
1 stop4h 50m
Southwest
Deal found 4/7![Southwest logo]()
$162
This Delta deal was found by Cheapflights users on 4/7. Clicking the “Pick Dates” 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.
ons. 4/2911:53 am
ONT
- BOI
1 stop7h 07m
Delta
lør. 5/26:16 pm
BOI
- ONT
1 stop5h 27m
Delta
Deal found 4/7![Delta logo]()
$187
This Kiwi.com deal was found by Cheapflights users on 4/6. Clicking the “Pick Dates” 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.
tor. 4/2312:59 am
ONT
- TWF
2 stops10h 01m
Multiple Airlines
man. 4/271:40 pm
TWF
- ONT
1 stop22h 04m
Multiple Airlines
Deal found 4/6![Multiple Airlines logo]()
$298
This Southwest deal was found by Cheapflights users on 4/7. Clicking the “Pick Dates” 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.
tor. 5/146:00 pm
ONT
- BOI
1 stop6h 00m
Southwest
tir. 5/1911:35 am
BOI
- ONT
1 stop6h 30m
Southwest
Deal found 4/7![Southwest logo]()
$177
This United Airlines deal was found by Cheapflights users on 4/6. Clicking the “Pick Dates” 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.
tir. 4/215:10 am
ONT
- SUN
1 stop7h 25m
United Airlines
fre. 4/242:24 pm
SUN
- ONT
1 stop7h 12m
United Airlines
Deal found 4/6![United Airlines logo]()
$369
This Delta deal was found by Cheapflights users on 4/6. Clicking the “Pick Dates” 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.
tor. 4/3011:53 am
ONT
- BOI
1 stop8h 31m
Delta
lør. 5/96:00 pm
BOI
- ONT
1 stop5h 34m
Delta
Deal found 4/6![Delta logo]()
$197
This Alaska Airlines deal was found by Cheapflights users on 4/7. Clicking the “Pick Dates” 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.
ons. 4/292:59 pm
ONT
- BOI
Nonstop2h 00m
Alaska Airlines
fre. 5/11:15 pm
BOI
- ONT
Nonstop2h 04m
Alaska Airlines
Deal found 4/7![Alaska Airlines logo]()
$197
This Alaska Airlines deal was found by Cheapflights users on 4/5. Clicking the “Pick Dates” 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.
søn. 5/317:48 pm
ONT
- BOI
Nonstop1h 59m
Alaska Airlines
lør. 6/64:14 pm
BOI
- ONT
Nonstop2h 03m
Alaska Airlines
Deal found 4/5![Alaska Airlines logo]()
$207
This Alaska Airlines deal was found by Cheapflights users on 4/6. Clicking the “Pick Dates” 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.
man. 5/42:59 pm
ONT
- BOI
Nonstop2h 00m
Alaska Airlines
tir. 5/51:15 pm
BOI
- ONT
Nonstop2h 04m
Alaska Airlines
Deal found 4/6![Alaska Airlines logo]()
$227
This Alaska Airlines deal was found by Cheapflights users on 4/10. Clicking the “Pick Dates” 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.
lør. 5/22:59 pm
ONT
- BOI
Nonstop2h 00m
Alaska Airlines
tir. 5/56:08 pm
BOI
- ONT
1 stop5h 24m
Alaska Airlines
Deal found 4/10![Alaska Airlines logo]()
$227
This Alaska Airlines deal was found by Cheapflights users on 4/7. Clicking the “Pick Dates” 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.
ons. 5/610:39 am
ONT
- BOI
1 stop11h 23m
Alaska Airlines
ons. 5/134:14 pm
BOI
- ONT
Nonstop2h 03m
Alaska Airlines
Deal found 4/7![Alaska Airlines logo]()
$230
This Southwest deal was found by Cheapflights users on 4/6. Clicking the “Pick Dates” 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.
fre. 5/17:00 am
ONT
- GEG
1 stop5h 50m
Southwest
tir. 5/55:10 am
GEG
- ONT
2 stops6h 45m
Southwest
Deal found 4/6![Southwest logo]()
$321
This Delta deal was found by Cheapflights users on 4/6. Clicking the “Pick Dates” 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.
ons. 6/36:00 am
ONT
- JAC
1 stop3h 48m
Delta
lør. 6/65:59 pm
JAC
- ONT
1 stop5h 46m
Delta
Deal found 4/6![Delta logo]()
$329
This United Airlines deal was found by Cheapflights users on 4/10. Clicking the “Pick Dates” 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.
lør. 5/25:00 am
ONT
- SUN
1 stop7h 38m
United Airlines
tir. 5/52:30 pm
SUN
- ONT
1 stop7h 06m
United Airlines
Deal found 4/10![United Airlines logo]()
$369
This Alaska Airlines deal was found by Cheapflights users on 4/6. Clicking the “Pick Dates” 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.
ons. 4/292:59 pm
ONT
- BOI
Nonstop2h 00m
Alaska Airlines
ons. 5/66:08 pm
BOI
- ONT
1 stop5h 24m
Alaska Airlines
Deal found 4/6![Alaska Airlines logo]()
$237
This Delta deal was found by Cheapflights users on 4/6. Clicking the “Pick Dates” 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.
man. 6/14:57 pm
ONT
- JAC
1 stop3h 32m
Delta
lør. 6/65:59 pm
JAC
- ONT
1 stop5h 46m
Delta
Deal found 4/6![Delta logo]()
$329
This Delta deal was found by Cheapflights users on 4/6. Clicking the “Pick Dates” 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.
man. 6/19:50 am
ONT
- JAC
1 stop6h 09m
Delta
ons. 6/106:06 pm
JAC
- ONT
1 stop6h 39m
Delta
Deal found 4/6![Delta logo]()
$329
This Alaska Airlines deal was found by Cheapflights users on 4/10. Clicking the “Pick Dates” 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.
søn. 5/317:48 pm
ONT
- BOI
Nonstop1h 59m
Alaska Airlines
søn. 6/74:14 pm
BOI
- ONT
Nonstop2h 03m
Alaska Airlines
Deal found 4/10![Alaska Airlines logo]()
$257
This Southwest deal was found by Cheapflights users on 4/8. Clicking the “Pick Dates” 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.
søn. 7/125:05 am
ONT
- GEG
1 stop4h 05m
Southwest
tir. 7/145:00 am
GEG
- ONT
1 stop6h 30m
Southwest
Deal found 4/8![Southwest logo]()
$382
This Delta deal was found by Cheapflights users on 4/6. Clicking the “Pick Dates” 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.
tir. 6/26:00 am
ONT
- JAC
1 stop3h 48m
Delta
man. 6/86:06 pm
JAC
- ONT
1 stop6h 39m
Delta
Deal found 4/6![Delta logo]()
$329
This United Airlines deal was found by Cheapflights users on 4/10. Clicking the “Pick Dates” 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.
ons. 5/65:00 am
ONT
- SUN
1 stop7h 38m
United Airlines
søn. 5/102:30 pm
SUN
- ONT
1 stop7h 06m
United Airlines
Deal found 4/10![United Airlines logo]()
$453
This Delta deal was found by Cheapflights users on 4/7. Clicking the “Pick Dates” 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.
tor. 5/75:50 pm
ONT
- GEG
1 stop5h 01m
Delta
tir. 5/126:10 am
GEG
- ONT
1 stop5h 02m
Delta
Deal found 4/7![Delta logo]()
$336
This United Airlines deal was found by Cheapflights users on 4/9. Clicking the “Pick Dates” 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.
ons. 10/75:00 am
ONT
- WYS
1 stop7h 20m
United Airlines
man. 10/122:02 pm
WYS
- ONT
1 stop7h 18m
United Airlines
Deal found 4/9![United Airlines logo]()
$459
This Alaska Airlines deal was found by Cheapflights users on 4/6. Clicking the “Pick Dates” 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.
tir. 4/286:00 am
ONT
- GEG
1 stop4h 38m
Alaska Airlines
lør. 5/25:00 am
GEG
- ONT
1 stop4h 45m
Alaska Airlines
Deal found 4/6![Alaska Airlines logo]()
$301
This Delta deal was found by Cheapflights users on 4/10. Clicking the “Pick Dates” 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.
lør. 4/257:00 am
ONT
- JAC
2 stops8h 13m
Delta
tir. 4/281:00 pm
JAC
- ONT
2 stops10h 37m
Delta
Deal found 4/10![Delta logo]()
$339
This United Airlines deal was found by Cheapflights users on 4/6. Clicking the “Pick Dates” 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.
lør. 8/15:00 am
ONT
- WYS
1 stop7h 32m
United Airlines
tor. 8/62:14 pm
WYS
- ONT
1 stop7h 28m
United Airlines
Deal found 4/6![United Airlines logo]()
$459
This United Airlines deal was found by Cheapflights users on 4/6. Clicking the “Pick Dates” 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.
man. 7/275:00 am
ONT
- WYS
1 stop7h 32m
United Airlines
ons. 8/52:07 pm
WYS
- ONT
1 stop7h 35m
United Airlines
Deal found 4/6![United Airlines logo]()
$459
This Alaska Airlines deal was found by Cheapflights users on 4/9. Clicking the “Pick Dates” 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.
tir. 5/123:26 pm
ONT
- GEG
1 stop6h 05m
Alaska Airlines
søn. 5/176:00 am
GEG
- ONT
1 stop5h 10m
Alaska Airlines
Deal found 4/9![Alaska Airlines logo]()
$323
This Delta deal was found by Cheapflights users on 4/6. Clicking the “Pick Dates” 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.
ons. 7/299:40 am
ONT
- JAC
1 stop6h 19m
Delta
ons. 8/56:06 pm
JAC
- ONT
1 stop6h 38m
Delta
Deal found 4/6![Delta logo]()
$364
Last-minute flights from Ontario to IdahoDiscover last-minute flight deals from Ontario to Idaho. Data last updated april 11, 2026 and is based on user searches.
Discover last-minute flight deals from Ontario to Idaho. Data last updated april 11, 2026 and is based on user searches.
This Alaska Airlines deal was found by Cheapflights users on 4/7. Clicking the “Pick Dates” 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.
ons. 4/292:59 pm
ONT
- BOI
Nonstop2h 00m
Alaska Airlines
ons. 5/61:15 pm
BOI
- ONT
Nonstop2h 04m
Alaska Airlines
Deal found 4/7![Alaska Airlines logo]()
$167
This Alaska Airlines deal was found by Cheapflights users on 4/7. Clicking the “Pick Dates” 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.
fre. 5/12:59 pm
ONT
- BOI
Nonstop2h 00m
Alaska Airlines
tor. 5/71:15 pm
BOI
- ONT
Nonstop2h 04m
Alaska Airlines
Deal found 4/7![Alaska Airlines logo]()
$177
This Alaska Airlines deal was found by Cheapflights users on 4/7. Clicking the “Pick Dates” 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.
fre. 5/12:59 pm
ONT
- BOI
Nonstop2h 00m
Alaska Airlines
lør. 5/21:15 pm
BOI
- ONT
Nonstop2h 04m
Alaska Airlines
Deal found 4/7![Alaska Airlines logo]()
$187
This Alaska Airlines deal was found by Cheapflights users on 4/7. Clicking the “Pick Dates” 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.
lør. 5/22:59 pm
ONT
- BOI
Nonstop2h 00m
Alaska Airlines
tir. 5/51:15 pm
BOI
- ONT
Nonstop2h 04m
Alaska Airlines
Deal found 4/7![Alaska Airlines logo]()
$137
This Expedia deal was found by Cheapflights users on 4/7. Clicking the “Pick Dates” 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.
lør. 5/212:59 am
ONT
- GEG
1 stop9h 50m
Frontier
fre. 5/812:33 pm
GEG
- ONT
1 stop21h 32m
Frontier
Deal found 4/7![Frontier logo]()
$140
This Alaska Airlines deal was found by Cheapflights users on 4/7. Clicking the “Pick Dates” 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.
lør. 5/22:59 pm
ONT
- BOI
Nonstop2h 00m
Alaska Airlines
tor. 5/71:15 pm
BOI
- ONT
Nonstop2h 04m
Alaska Airlines
Deal found 4/7![Alaska Airlines logo]()
$157
This Southwest deal was found by Cheapflights users on 4/9. Clicking the “Pick Dates” 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.
lør. 5/29:30 am
ONT
- BOI
1 stop5h 45m
Southwest
tir. 5/52:00 pm
BOI
- ONT
2 stops6h 40m
Southwest
Deal found 4/9![Southwest logo]()
$162
This Delta deal was found by Cheapflights users on 4/8. Clicking the “Pick Dates” 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.
lør. 5/22:20 pm
ONT
- BOI
1 stop6h 04m
Delta
søn. 5/35:40 am
BOI
- ONT
1 stop6h 33m
Delta
Deal found 4/8![Delta logo]()
$178
This Southwest deal was found by Cheapflights users on 4/6. Clicking the “Pick Dates” 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.
ons. 5/63:45 pm
ONT
- BOI
2 stops7h 40m
Southwest
ons. 5/135:00 pm
BOI
- ONT
1 stop4h 50m
Southwest
Deal found 4/6![Southwest logo]()
$172
This CheapOair deal was found by Cheapflights users on 4/7. Clicking the “Pick Dates” 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.
ons. 5/610:50 am
ONT
- BOI
1 stop24h 37m
Frontier
søn. 5/101:22 pm
BOI
- ONT
1 stop21h 43m
Frontier
Deal found 4/7![Frontier logo]()
$192
This Kiwi.com deal was found by Cheapflights users on 4/11. Clicking the “Pick Dates” 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.
tor. 5/711:36 am
ONT
- GEG
1 stop8h 53m
Multiple Airlines
søn. 5/179:19 pm
GEG
- ONT
1 stop10h 30m
Multiple Airlines
Deal found 4/11![Multiple Airlines logo]()
$197
This Frontier deal was found by Cheapflights users on 4/10. Clicking the “Pick Dates” 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.
fre. 5/296:00 am
ONT
- GEG
1 stop5h 38m
Frontier
man. 6/112:33 pm
GEG
- ONT
1 stop11h 16m
Frontier
Deal found 4/10![Frontier logo]()
$180
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 april 11, 2026.
Search for one-way flight options from Ontario to Idaho. Find affordable one-way fares based on user searches. Data last updated april 11, 2026.
This Priceline deal was found by Cheapflights users on 4/10. Clicking the “Pick Dates” 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.
søn. 5/106:00 am
ONT
- BOI
1 stop5h 27m
Frontier
Deal found 4/10![Frontier logo]()
$70
This Priceline deal was found by Cheapflights users on 4/6. Clicking the “Pick Dates” 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.
lør. 5/212:59 am
ONT
- GEG
1 stop9h 50m
Frontier
Deal found 4/6![Frontier logo]()
$76
This Southwest deal was found by Cheapflights users on 4/7. Clicking the “Pick Dates” 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.
ons. 4/295:20 pm
ONT
- BOI
1 stop5h 00m
Southwest
Deal found 4/7![Southwest logo]()
$79
This Kiwi.com deal was found by Cheapflights users on 4/9. Clicking the “Pick Dates” 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.
ons. 5/134:39 pm
ONT
- GEG
1 stop27h 50m
Multiple Airlines
Deal found 4/9![Multiple Airlines logo]()
$82
This Trip.com deal was found by Cheapflights users on 4/9. Clicking the “Pick Dates” 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.
tor. 5/711:36 am
ONT
- GEG
1 stop8h 53m
Multiple Airlines
Deal found 4/9![Multiple Airlines logo]()
$83
This Alaska Airlines deal was found by Cheapflights users on 4/7. Clicking the “Pick Dates” 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.
tir. 5/122:59 pm
ONT
- BOI
Nonstop2h 00m
Alaska Airlines
Deal found 4/7![Alaska Airlines logo]()
$89
This Frontier deal was found by Cheapflights users on 4/10. Clicking the “Pick Dates” 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.
man. 6/86:00 am
ONT
- GEG
1 stop5h 38m
Frontier
Deal found 4/10![Frontier logo]()
$90
This Priceline deal was found by Cheapflights users on 4/7. Clicking the “Pick Dates” 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.
tor. 5/146:00 am
ONT
- BOI
1 stop5h 27m
Frontier
Deal found 4/7![Frontier logo]()
$90
This Expedia deal was found by Cheapflights users on 4/7. Clicking the “Pick Dates” 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.
ons. 4/2212:59 am
ONT
- GEG
1 stop9h 50m
Frontier
Deal found 4/7![Frontier logo]()
$96
This Southwest deal was found by Cheapflights users on 4/7. Clicking the “Pick Dates” 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.
tor. 4/306:00 pm
ONT
- BOI
1 stop6h 00m
Southwest
Deal found 4/7![Southwest logo]()
$99
This CheapOair deal was found by Cheapflights users on 4/9. Clicking the “Pick Dates” 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.
lør. 5/910:50 am
ONT
- BOI
1 stop24h 37m
Frontier
Deal found 4/9![Frontier logo]()
$102
This Southwest deal was found by Cheapflights users on 4/8. Clicking the “Pick Dates” 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.
fre. 6/54:40 pm
ONT
- BOI
2 stops6h 35m
Southwest
Deal found 4/8![Southwest logo]()
$104
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 april 11, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $137 (Alaska Airlines) |
One-way from | $70 (Priceline) |
Popular in | February |
Cheapest in | April |
Average price | $217 |
Good round-trip deal | $257 or less |
Good one-way deal | $218 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 april 11, 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
fre. 5/1
2:59 pm-5:59 pm
Nonstop2h 00m
Boise Air Term. Gowen Fld
lør. 5/16
4:14 pm-5:17 pm
Nonstop2h 03m
$157
OntarioBoise
ONT - BOI
ONTBOI
Ontario
ons. 5/6
3:45 pm-12:25 am
2 stops7h 40m
Boise Air Term. Gowen Fld
ons. 5/13
5:00 pm-8:50 pm
1 stop4h 50m
$162
OntarioBoise
ONT - BOI
ONTBOI
Ontario
tor. 5/14
6:00 pm-1:00 am
1 stop6h 00m
Boise Air Term. Gowen Fld
tir. 5/19
11:35 am-5:05 pm
1 stop6h 30m
$177
OntarioBoise
ONT - BOI
ONTBOI
Ontario
ons. 4/29
11:53 am-8:00 pm
1 stop7h 07m
Boise Air Term. Gowen Fld
lør. 5/2
6:16 pm-10:43 pm
1 stop5h 27m
$187
OntarioBoise
ONT - BOI
ONTBOI
Ontario
tor. 4/30
11:53 am-9:24 pm
1 stop8h 31m
Boise Air Term. Gowen Fld
lør. 5/9
6:00 pm-10:34 pm
1 stop5h 34m
$197
OntarioBoise
ONT - BOI
ONTBOI
Ontario
ons. 4/29
2:59 pm-5:59 pm
Nonstop2h 00m
Boise Air Term. Gowen Fld
fre. 5/1
1:15 pm-2:19 pm
Nonstop2h 04m
$197
Quickest round-trip
OntarioBoise
ONT - BOI
ONTBOI
Ontario
søn. 5/31
7:48 pm-10:47 pm
Nonstop1h 59m
Boise Air Term. Gowen Fld
lør. 6/6
4:14 pm-5:17 pm
Nonstop2h 03m
$207
OntarioBoise
ONT - BOI
ONTBOI
Ontario
man. 5/4
2:59 pm-5:59 pm
Nonstop2h 00m
Boise Air Term. Gowen Fld
tir. 5/5
1:15 pm-2:19 pm
Nonstop2h 04m
$227
OntarioBoise
ONT - BOI
ONTBOI
Ontario
lør. 5/2
2:59 pm-5:59 pm
Nonstop2h 00m
Boise Air Term. Gowen Fld
tir. 5/5
6:08 pm-10:32 pm
1 stop5h 24m
$227
OntarioBoise
ONT - BOI
ONTBOI
Ontario
ons. 5/6
10:39 am-11:02 pm
1 stop11h 23m
Boise Air Term. Gowen Fld
ons. 5/13
4:14 pm-5:17 pm
Nonstop2h 03m
$230
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-BOI
ONT-GEG
ONT-TWF
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-BOI
ONT-GEG
ONT-TWF
ONT-SUN
What is the cheapest month to book a flight from Ontario to Idaho?
Currently, November is the cheapest month in which you can book a flight from Ontario to Idaho (average of $60). Flying from Ontario to Idaho in December is currently the most expensive (average of $159). 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 april 11, 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 64% 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 april 11, 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?
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 april 11, 2026.
See what other customers who have flown with Southwest,Alaska Airlines, 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.
Entertainment
7.5
Crew
8.6
Overall
8.0
Food
7.0
Boarding
8.1
Comfort
8.0
Reviews
1 / 20
10.0
ExcellentWilliam Drew,Nov 2025
SJC - HNL
Entertainment
7.5
Crew
8.6
Overall
8.0
Food
7.0
Boarding
8.1
Comfort
8.0
Reviews
1 / 20
10.0
ExcellentWilliam Drew,Nov 2025
SJC - HNL
Entertainment
7.5
Crew
8.6
Overall
8.0
Food
7.0
Boarding
8.1
Comfort
8.0
Reviews
1 / 20
10.0
ExcellentWilliam Drew,Nov 2025
SJC - HNL
Entertainment
7.5
Crew
8.6
Overall
8.0
Food
7.0
Boarding
8.1
Comfort
8.0
Reviews
1 / 20
10.0
ExcellentWilliam Drew,Nov 2025
SJC - HNL
Entertainment
7.5
Crew
8.6
Overall
8.0
Food
7.0
Boarding
8.1
Comfort
8.0
Reviews
1 / 20
10.0
ExcellentWilliam Drew,Nov 2025
SJC - HNL
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 april 11, 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 april 11, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$137 | Average$253 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$153 | Average$358 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$190 | Average$358 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$196 | Average$315 | FlexibilityNo cancel fee | On-time69% |