$99+ 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 8/26. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — BOI
Aug 2 — Aug 91
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 July 3, 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 July 3, 2026.
This Alaska Airlines deal was found by Cheapflights users on 6/29. Clicking the “Pick Dates” 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 9/154:50 pm
ONT
- BOI
Nonstop1h 55m
Alaska Airlines
Sat 9/193:02 pm
BOI
- ONT
Nonstop2h 08m
Alaska Airlines
Deal found 6/29![Alaska Airlines logo]()
$177
This Alaska Airlines deal was found by Cheapflights users on 7/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/94:50 pm
ONT
- BOI
Nonstop1h 55m
Alaska Airlines
Fri 9/183:02 pm
BOI
- ONT
Nonstop2h 08m
Alaska Airlines
Deal found 7/2![Alaska Airlines logo]()
$187
This Delta deal was found by Cheapflights users on 7/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/121:04 pm
ONT
- BOI
1 stop4h 49m
Delta
Tue 9/156:44 pm
BOI
- ONT
1 stop6h 03m
Delta
Deal found 7/2![Delta logo]()
$197
This CheapOair deal was found by Cheapflights users on 7/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/204:50 pm
ONT
- BOI
Nonstop1h 55m
Alaska Airlines
Tue 8/253:02 pm
BOI
- ONT
Nonstop2h 08m
Alaska Airlines
Deal found 7/1![Alaska Airlines logo]()
$199
This CheapOair deal was found by Cheapflights users on 7/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/184:50 pm
ONT
- BOI
Nonstop1h 55m
Alaska Airlines
Mon 9/213:02 pm
BOI
- ONT
Nonstop2h 08m
Alaska Airlines
Deal found 7/2![Alaska Airlines logo]()
$201
This Delta deal was found by Cheapflights users on 6/29. Clicking the “Pick Dates” 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 8/236:00 am
ONT
- BOI
1 stop5h 14m
Delta
Sat 8/298:45 am
BOI
- ONT
1 stop4h 31m
Delta
Deal found 6/29![Delta logo]()
$202
This Delta deal was found by Cheapflights users on 6/28. Clicking the “Pick Dates” 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 8/221:06 pm
ONT
- BOI
1 stop4h 54m
Delta
Sun 8/236:00 am
BOI
- ONT
1 stop3h 52m
Delta
Deal found 6/28![Delta logo]()
$203
This Delta deal was found by Cheapflights users on 7/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/121:04 pm
ONT
- BOI
1 stop4h 49m
Delta
Thu 9/176:00 am
BOI
- ONT
1 stop4h 02m
Delta
Deal found 7/2![Delta logo]()
$207
This CheapOair deal was found by Cheapflights users on 6/28. Clicking the “Pick Dates” 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 8/234:50 pm
ONT
- BOI
Nonstop1h 55m
Alaska Airlines
Sat 8/293:02 pm
BOI
- ONT
Nonstop2h 08m
Alaska Airlines
Deal found 6/28![Alaska Airlines logo]()
$210
This Booking.com deal was found by Cheapflights users on 7/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com 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 7/2![Alaska Airlines logo]()
$211
This Delta deal was found by Cheapflights users on 6/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/86:00 am
ONT
- WYS
1 stop5h 27m
Delta
Wed 8/191:09 pm
WYS
- ONT
2 stops10h 36m
Delta
Deal found 6/30![Delta logo]()
$304
This Delta deal was found by Cheapflights users on 6/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/286:00 am
ONT
- PIH
1 stop3h 34m
Delta
Mon 8/317:00 pm
PIH
- ONT
1 stop4h 23m
Delta
Deal found 6/30![Delta logo]()
$317
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 July 3, 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 July 3, 2026.
This Delta deal was found by Cheapflights users on 6/29. Clicking the “Pick Dates” 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 8/236:00 am
ONT
- BOI
1 stop5h 14m
Delta
Sat 8/298:45 am
BOI
- ONT
1 stop4h 31m
Delta
Deal found 6/29![Delta logo]()
$202
This Alaska Airlines deal was found by Cheapflights users on 6/28. Clicking the “Pick Dates” 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 9/156:02 am
ONT
- BOI
1 stop5h 33m
Alaska Airlines
Sat 9/193:02 pm
BOI
- ONT
Nonstop2h 08m
Alaska Airlines
Deal found 6/28![Alaska Airlines logo]()
$237
This Southwest deal was found by Cheapflights users on 6/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/104:10 pm
ONT
- BOI
2 stops6h 25m
Southwest
Sun 9/134:35 pm
BOI
- ONT
1 stop5h 35m
Southwest
Deal found 6/30![Southwest logo]()
$273
This United Airlines deal was found by Cheapflights users on 6/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/205:00 am
ONT
- WYS
1 stop7h 20m
United Airlines
Sun 9/272:05 pm
WYS
- ONT
1 stop7h 53m
United Airlines
Deal found 6/30![United Airlines logo]()
$403
This Southwest deal was found by Cheapflights users on 6/28. Clicking the “Pick Dates” 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 9/55:40 am
ONT
- BOI
2 stops6h 20m
Southwest
Mon 9/77:00 am
BOI
- ONT
1 stop6h 40m
Southwest
Deal found 6/28![Southwest logo]()
$282
This Delta deal was found by Cheapflights users on 6/28. Clicking the “Pick Dates” 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 8/145:05 pm
ONT
- BOI
1 stop5h 54m
Delta
Mon 8/176:00 am
BOI
- ONT
1 stop3h 52m
Delta
Deal found 6/28![Delta logo]()
$302
This Alaska Airlines deal was found by Cheapflights users on 6/28. Clicking the “Pick Dates” 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 7/295:54 pm
ONT
- GEG
1 stop6h 05m
Alaska Airlines
Tue 8/46:13 am
GEG
- ONT
1 stop5h 01m
Alaska Airlines
Deal found 6/28![Alaska Airlines logo]()
$333
This Delta deal was found by Cheapflights users on 6/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/286:00 am
ONT
- PIH
1 stop3h 34m
Delta
Mon 8/317:00 pm
PIH
- ONT
1 stop4h 23m
Delta
Deal found 6/30![Delta logo]()
$317
This Southwest deal was found by Cheapflights users on 6/27. Clicking the “Pick Dates” 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 9/186:10 am
ONT
- BOI
2 stops7h 05m
Southwest
Sun 9/206:30 am
BOI
- ONT
1 stop6h 15m
Southwest
Deal found 6/27![Southwest logo]()
$327
This Alaska Airlines deal was found by Cheapflights users on 7/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/194:50 pm
ONT
- GEG
1 stop3h 56m
Alaska Airlines
Sat 8/227:03 am
GEG
- ONT
1 stop7h 06m
Alaska Airlines
Deal found 7/1![Alaska Airlines logo]()
$333
This Southwest deal was found by Cheapflights users on 7/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/1211:10 am
ONT
- GEG
1 stop3h 55m
Southwest
Tue 8/185:45 am
GEG
- ONT
1 stop4h 30m
Southwest
Deal found 7/1![Southwest logo]()
$328
This Delta deal was found by Cheapflights users on 6/28. Clicking the “Pick Dates” 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 8/155:05 pm
ONT
- GEG
1 stop5h 26m
Delta
Mon 8/177:15 pm
GEG
- ONT
1 stop4h 19m
Delta
Deal found 6/28![Delta logo]()
$336
This Alaska Airlines deal was found by Cheapflights users on 6/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/42:05 pm
ONT
- GEG
1 stop6h 51m
Alaska Airlines
Mon 8/108:53 am
GEG
- ONT
1 stop6h 45m
Alaska Airlines
Deal found 6/30![Alaska Airlines logo]()
$336
This United Airlines deal was found by Cheapflights users on 6/29. Clicking the “Pick Dates” 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.
Mon 7/131:50 pm
ONT
- JAC
1 stop6h 40m
United Airlines
Fri 7/178:00 am
JAC
- ONT
1 stop5h 12m
United Airlines
Deal found 6/29![United Airlines logo]()
$429
This Delta deal was found by Cheapflights users on 7/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/255:05 pm
ONT
- BOI
1 stop5h 59m
Delta
Mon 11/305:45 pm
BOI
- ONT
1 stop7h 03m
Delta
Deal found 7/2![Delta logo]()
$337
This Southwest deal was found by Cheapflights users on 6/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/123:35 pm
ONT
- BOI
2 stops5h 50m
Southwest
Sun 8/166:00 am
BOI
- ONT
1 stop6h 35m
Southwest
Deal found 6/30![Southwest logo]()
$338
This Alaska Airlines deal was found by Cheapflights users on 7/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/234:50 pm
ONT
- BOI
Nonstop1h 55m
Alaska Airlines
Sat 9/263:02 pm
BOI
- ONT
Nonstop2h 08m
Alaska Airlines
Deal found 7/2![Alaska Airlines logo]()
$347
This United Airlines deal was found by Cheapflights users on 6/28. Clicking the “Pick Dates” 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.
Mon 8/35:00 am
ONT
- JAC
1 stop6h 46m
United Airlines
Thu 8/68:00 am
JAC
- ONT
1 stop5h 12m
United Airlines
Deal found 6/28![United Airlines logo]()
$461
This Delta deal was found by Cheapflights users on 7/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/141:06 pm
ONT
- JAC
1 stop4h 49m
Delta
Sat 8/226:01 pm
JAC
- ONT
1 stop5h 22m
Delta
Deal found 7/2![Delta logo]()
$349
This Southwest deal was found by Cheapflights users on 6/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/306:35 pm
ONT
- BOI
2 stops5h 40m
Southwest
Thu 8/62:55 pm
BOI
- ONT
2 stops6h 45m
Southwest
Deal found 6/30![Southwest logo]()
$352
This CheapOair deal was found by Cheapflights users on 6/27. Clicking the “Pick Dates” 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.
Fri 8/214:50 pm
ONT
- GEG
1 stop4h 23m
Alaska Airlines
Tue 8/253:05 pm
GEG
- ONT
1 stop5h 19m
Alaska Airlines
Deal found 6/27![Alaska Airlines logo]()
$373
This United Airlines deal was found by Cheapflights users on 6/29. Clicking the “Pick Dates” 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.
Mon 9/149:01 am
ONT
- JAC
1 stop6h 38m
United Airlines
Thu 9/174:25 pm
JAC
- ONT
1 stop5h 28m
United Airlines
Deal found 6/29![United Airlines logo]()
$461
This Delta deal was found by Cheapflights users on 6/28. Clicking the “Pick Dates” 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 8/166:00 am
ONT
- JAC
1 stop5h 15m
Delta
Thu 8/207:40 am
JAC
- ONT
1 stop5h 36m
Delta
Deal found 6/28![Delta logo]()
$349
This Priceline deal was found by Cheapflights users on 6/27. Clicking the “Pick Dates” 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.
Fri 8/75:32 pm
ONT
- GEG
1 stop5h 27m
Alaska Airlines
Tue 8/118:53 am
GEG
- ONT
1 stop6h 45m
Alaska Airlines
Deal found 6/27![Alaska Airlines logo]()
$380
This United Airlines deal was found by Cheapflights users on 7/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/21:50 pm
ONT
- JAC
1 stop6h 40m
United Airlines
Thu 8/68:00 am
JAC
- ONT
1 stop5h 12m
United Airlines
Deal found 7/2![United Airlines logo]()
$461
This Southwest deal was found by Cheapflights users on 6/28. Clicking the “Pick Dates” 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 9/115:45 pm
ONT
- GEG
1 stop5h 30m
Southwest
Sat 9/196:15 am
GEG
- ONT
2 stops8h 00m
Southwest
Deal found 6/28![Southwest logo]()
$385
This Alaska Airlines deal was found by Cheapflights users on 7/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/276:05 pm
ONT
- GEG
1 stop5h 06m
Alaska Airlines
Sun 8/303:05 pm
GEG
- ONT
1 stop5h 19m
Alaska Airlines
Deal found 7/1![Alaska Airlines logo]()
$383
This Delta deal was found by Cheapflights users on 6/28. Clicking the “Pick Dates” 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 8/276:20 am
ONT
- GEG
1 stop5h 48m
Delta
Sun 8/307:15 pm
GEG
- ONT
1 stop4h 19m
Delta
Deal found 6/28![Delta logo]()
$383
This Southwest deal was found by Cheapflights users on 6/29. Clicking the “Pick Dates” 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 8/252:10 pm
ONT
- GEG
2 stops7h 30m
Southwest
Tue 9/85:45 am
GEG
- ONT
2 stops6h 55m
Southwest
Deal found 6/29![Southwest logo]()
$390
This United Airlines deal was found by Cheapflights users on 7/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/191:18 pm
ONT
- JAC
1 stop6h 40m
United Airlines
Sat 7/258:00 am
JAC
- ONT
1 stop5h 12m
United Airlines
Deal found 7/1![United Airlines logo]()
$474
Last-minute flights from Ontario to IdahoDiscover last-minute flight deals from Ontario to Idaho. Data last updated July 3, 2026 and is based on user searches.
Discover last-minute flight deals from Ontario to Idaho. Data last updated July 3, 2026 and is based on user searches.
This Delta deal was found by Cheapflights users on 6/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/86:00 am
ONT
- WYS
1 stop5h 27m
Delta
Wed 8/191:09 pm
WYS
- ONT
2 stops10h 36m
Delta
Deal found 6/30![Delta logo]()
$304
This Alaska Airlines deal was found by Cheapflights users on 7/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/104:18 pm
ONT
- BOI
Nonstop1h 55m
Alaska Airlines
Wed 8/193:02 pm
BOI
- ONT
Nonstop2h 08m
Alaska Airlines
Deal found 7/2![Alaska Airlines logo]()
$232
This CheapOair deal was found by Cheapflights users on 7/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/194:50 pm
ONT
- BOI
Nonstop1h 55m
Alaska Airlines
Sat 8/223:02 pm
BOI
- ONT
Nonstop2h 08m
Alaska Airlines
Deal found 7/2![Alaska Airlines logo]()
$177
This Southwest deal was found by Cheapflights users on 6/28. Clicking the “Pick Dates” 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.
Wed 8/197:00 am
ONT
- BOI
1 stop6h 50m
Southwest
Sat 8/292:25 pm
BOI
- ONT
1 stop7h 25m
Southwest
Deal found 6/28![Southwest logo]()
$187
This Booking.com deal was found by Cheapflights users on 6/28. Clicking the “Pick Dates” 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 8/194:50 pm
ONT
- BOI
Nonstop1h 55m
Alaska Airlines
Sat 8/293:02 pm
BOI
- ONT
Nonstop2h 08m
Alaska Airlines
Deal found 6/28![Alaska Airlines logo]()
$234
This CheapOair deal was found by Cheapflights users on 7/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/204:50 pm
ONT
- BOI
Nonstop1h 55m
Alaska Airlines
Tue 8/253:02 pm
BOI
- ONT
Nonstop2h 08m
Alaska Airlines
Deal found 7/1![Alaska Airlines logo]()
$199
This Delta deal was found by Cheapflights users on 6/28. Clicking the “Pick Dates” 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 8/221:06 pm
ONT
- BOI
1 stop4h 54m
Delta
Sun 8/236:00 am
BOI
- ONT
1 stop3h 52m
Delta
Deal found 6/28![Delta logo]()
$203
This Delta deal was found by Cheapflights users on 6/29. Clicking the “Pick Dates” 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 8/236:00 am
ONT
- BOI
1 stop5h 14m
Delta
Sat 8/298:45 am
BOI
- ONT
1 stop4h 31m
Delta
Deal found 6/29![Delta logo]()
$202
This United Airlines deal was found by Cheapflights users on 6/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/236:08 am
ONT
- BOI
1 stop3h 58m
United Airlines
Sat 8/298:15 am
BOI
- ONT
1 stop4h 57m
United Airlines
Deal found 6/30![United Airlines logo]()
$207
This CheapOair deal was found by Cheapflights users on 6/28. Clicking the “Pick Dates” 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 8/234:50 pm
ONT
- BOI
Nonstop1h 55m
Alaska Airlines
Sat 8/293:02 pm
BOI
- ONT
Nonstop2h 08m
Alaska Airlines
Deal found 6/28![Alaska Airlines logo]()
$210
This Booking.com deal was found by Cheapflights users on 7/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com 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 7/2![Alaska Airlines logo]()
$211
This Delta deal was found by Cheapflights users on 6/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/286:00 am
ONT
- PIH
1 stop3h 34m
Delta
Mon 8/317:00 pm
PIH
- ONT
1 stop4h 23m
Delta
Deal found 6/30![Delta logo]()
$317
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 July 3, 2026.
Search for one-way flight options from Ontario to Idaho. Find affordable one-way fares based on user searches. Data last updated July 3, 2026.
This Delta deal was found by Cheapflights users on 6/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/265:05 pm
ONT
- BOI
1 stop5h 54m
Delta
Deal found 6/30![Delta logo]()
$99
This United Airlines deal was found by Cheapflights users on 6/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/149:00 am
ONT
- BOI
1 stop6h 59m
United Airlines
Deal found 6/29![United Airlines logo]()
$109
This Kiwi.com deal was found by Cheapflights users on 6/28. Clicking the “Pick Dates” 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 7/286:00 am
ONT
- BOI
1 stop5h 29m
Frontier
Deal found 6/28![Frontier logo]()
$117
This Priceline deal was found by Cheapflights users on 6/27. Clicking the “Pick Dates” 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 10/134:42 pm
ONT
- BOI
Nonstop2h 00m
Alaska Airlines
Deal found 6/27![Alaska Airlines logo]()
$119
This Frontier deal was found by Cheapflights users on 6/28. Clicking the “Pick Dates” 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 8/46:00 am
ONT
- BOI
1 stop5h 29m
Frontier
Deal found 6/28![Frontier logo]()
$120
This Booking.com deal was found by Cheapflights users on 6/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/144:42 pm
ONT
- BOI
Nonstop2h 00m
Alaska Airlines
Deal found 6/30![Alaska Airlines logo]()
$121
This Booking.com deal was found by Cheapflights users on 7/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/35:12 pm
ONT
- BOI
Nonstop2h 00m
Alaska Airlines
Deal found 7/1![Alaska Airlines logo]()
$122
This Frontier deal was found by Cheapflights users on 7/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/236:00 am
ONT
- BOI
1 stop5h 29m
Frontier
Deal found 7/2![Frontier logo]()
$124
This Priceline deal was found by Cheapflights users on 6/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/114:50 pm
ONT
- BOI
Nonstop1h 55m
Alaska Airlines
Deal found 6/30![Alaska Airlines logo]()
$129
This Booking.com deal was found by Cheapflights users on 6/28. Clicking the “Pick Dates” 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.
Mon 11/95:12 pm
ONT
- BOI
Nonstop2h 00m
Alaska Airlines
Deal found 6/28![Alaska Airlines logo]()
$130
This Trip.com deal was found by Cheapflights users on 6/27. Clicking the “Pick Dates” 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.
Wed 7/2910:49 am
ONT
- BOI
1 stop24h 40m
Frontier
Deal found 6/27![Frontier logo]()
$131
This Trip.com deal was found by Cheapflights users on 6/28. Clicking the “Pick Dates” 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.
Sat 10/32:55 pm
ONT
- BOI
1 stop20h 09m
Frontier
Deal found 6/28![Frontier logo]()
$132
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 July 3, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $177 (Alaska Airlines) |
One-way from | $99 (Delta) |
Popular in | February |
Cheapest in | April |
Average price | $375 |
Good round-trip deal | $287 or less |
Good one-way deal | $173 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 July 3, 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
Sun 8/23
6:00 am-12:14 pm
1 stop5h 14m
Boise Air Term. Gowen Fld
Sat 8/29
8:45 am-12:16 pm
1 stop4h 31m
$202
OntarioBoise
ONT - BOI
ONTBOI
Ontario
Tue 9/15
6:02 am-12:35 pm
1 stop5h 33m
Boise Air Term. Gowen Fld
Sat 9/19
3:02 pm-4:10 pm
Nonstop2h 08m
$237
OntarioBoise
ONT - BOI
ONTBOI
Ontario
Thu 9/10
4:10 pm-11:35 pm
2 stops6h 25m
Boise Air Term. Gowen Fld
Sun 9/13
4:35 pm-9:10 pm
1 stop5h 35m
$273
OntarioBoise
ONT - BOI
ONTBOI
Ontario
Sat 9/5
5:40 am-1:00 pm
2 stops6h 20m
Boise Air Term. Gowen Fld
Mon 9/7
7:00 am-12:40 pm
1 stop6h 40m
$282
OntarioBoise
ONT - BOI
ONTBOI
Ontario
Fri 8/14
5:05 pm-11:59 pm
1 stop5h 54m
Boise Air Term. Gowen Fld
Mon 8/17
6:00 am-8:52 am
1 stop3h 52m
$302
OntarioPocatello
ONT - PIH
ONTPIH
Ontario
Fri 8/28
6:00 am-10:34 am
1 stop3h 34m
Pocatello
Mon 8/31
7:00 pm-10:23 pm
1 stop4h 23m
$317
OntarioBoise
ONT - BOI
ONTBOI
Ontario
Fri 9/18
6:10 am-2:15 pm
2 stops7h 05m
Boise Air Term. Gowen Fld
Sun 9/20
6:30 am-11:45 am
1 stop6h 15m
$327
OntarioSpokane
ONT - GEG
ONTGEG
Ontario
Wed 8/12
11:10 am-3:05 pm
1 stop3h 55m
Spokane
Tue 8/18
5:45 am-10:15 am
1 stop4h 30m
$328
OntarioSpokane
ONT - GEG
ONTGEG
Ontario
Wed 7/29
5:54 pm-11:59 pm
1 stop6h 05m
Spokane
Tue 8/4
6:13 am-11:14 am
1 stop5h 01m
$333
OntarioSpokane
ONT - GEG
ONTGEG
Ontario
Wed 8/19
4:50 pm-8:46 pm
1 stop3h 56m
Spokane
Sat 8/22
7:03 am-2:09 pm
1 stop7h 06m
$333
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-IDA
ONT-JAC
ONT-SUN
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-IDA
ONT-JAC
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 July is currently the most expensive (average of $199). 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 July 3, 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 July 3, 2026.
The most flights from ONT to USID are scheduled on a Tuesday (2 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 78 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 July 3, 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.
Overall
7.9
Food
7.1
Boarding
8.1
Entertainment
7.0
Comfort
7.8
Crew
8.5
Reviews
1 / 20
10.0
ExcellentFranzi,Mar 2026
SFO - PDX
Overall
7.9
Food
7.1
Boarding
8.1
Entertainment
7.0
Comfort
7.8
Crew
8.5
Reviews
1 / 20
10.0
ExcellentFranzi,Mar 2026
SFO - PDX
Overall
7.9
Food
7.1
Boarding
8.1
Entertainment
7.0
Comfort
7.8
Crew
8.5
Reviews
1 / 20
10.0
ExcellentFranzi,Mar 2026
SFO - PDX
Overall
7.9
Food
7.1
Boarding
8.1
Entertainment
7.0
Comfort
7.8
Crew
8.5
Reviews
1 / 20
10.0
ExcellentFranzi,Mar 2026
SFO - PDX
Overall
7.9
Food
7.1
Boarding
8.1
Entertainment
7.0
Comfort
7.8
Crew
8.5
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.
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.
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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 July 3, 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 July 3, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$117 | Average$277 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$168 | Average$356 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$169 | Average$320 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$196 | Average$306 | FlexibilityNo cancel fee | On-time69% |