$89+ 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
May 30 — Jun 61
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 April 30, 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 30, 2026.
This Alaska Airlines deal was found by Cheapflights users on 4/28. 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 5/267:48 pm
ONT
- BOI
Nonstop1h 59m
Alaska Airlines
Sat 5/304:14 pm
BOI
- ONT
Nonstop2h 03m
Alaska Airlines
Deal found 4/28![Alaska Airlines logo]()
$157
This Expedia deal was found by Cheapflights users on 4/28. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/2410:50 am
ONT
- GEG
1 stop24h 48m
Frontier
Wed 5/2712:33 pm
GEG
- ONT
1 stop11h 16m
Frontier
Deal found 4/28![Frontier logo]()
$160
This Frontier deal was found by Cheapflights users on 4/28. 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.
Sun 5/246:00 am
ONT
- BOI
1 stop5h 30m
Frontier
Tue 6/21:25 pm
BOI
- ONT
1 stop11h 24m
Frontier
Deal found 4/28![Frontier logo]()
$160
This Delta deal was found by Cheapflights users on 4/27. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/36:45 am
ONT
- BOI
1 stop6h 56m
Delta
Tue 6/96:10 pm
BOI
- ONT
1 stop5h 31m
Delta
Deal found 4/27![Delta logo]()
$167
This Alaska Airlines deal was found by Cheapflights users on 4/28. 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.
Thu 5/287:48 pm
ONT
- BOI
Nonstop1h 59m
Alaska Airlines
Sat 5/304:14 pm
BOI
- ONT
Nonstop2h 03m
Alaska Airlines
Deal found 4/28![Alaska Airlines logo]()
$177
This Frontier deal was found by Cheapflights users on 4/27. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/26:00 am
ONT
- BOI
1 stop5h 30m
Frontier
Tue 6/91:25 pm
BOI
- ONT
1 stop11h 24m
Frontier
Deal found 4/27![Frontier logo]()
$180
This Frontier deal was found by Cheapflights users on 4/27. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/266:00 am
ONT
- BOI
1 stop5h 30m
Frontier
Tue 6/21:25 pm
BOI
- ONT
1 stop11h 24m
Frontier
Deal found 4/27![Frontier logo]()
$185
This Alaska Airlines deal was found by Cheapflights users on 4/28. 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.
Sun 5/247:48 pm
ONT
- BOI
Nonstop1h 59m
Alaska Airlines
Tue 6/24:14 pm
BOI
- ONT
Nonstop2h 03m
Alaska Airlines
Deal found 4/28![Alaska Airlines logo]()
$187
This Frontier deal was found by Cheapflights users on 4/28. 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 6/236:00 am
ONT
- BOI
1 stop5h 30m
Frontier
Tue 6/301:25 pm
BOI
- ONT
1 stop11h 24m
Frontier
Deal found 4/28![Frontier logo]()
$190
This CheapOair deal was found by Cheapflights users on 4/26. Clicking the “Pick Dates” 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 5/2810:50 am
ONT
- GEG
1 stop24h 48m
Frontier
Mon 6/112:33 pm
GEG
- ONT
1 stop21h 32m
Frontier
Deal found 4/26![Frontier logo]()
$191
This Expedia deal was found by Cheapflights users on 4/27. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/266:00 am
ONT
- BOI
1 stop5h 30m
Multiple Airlines
Wed 6/34:14 pm
BOI
- ONT
Nonstop2h 03m
Multiple Airlines
Deal found 4/27![Multiple Airlines logo]()
$194
This Delta deal was found by Cheapflights users on 4/28. 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 5/305:55 pm
ONT
- BOI
1 stop4h 09m
Delta
Tue 6/210:39 am
BOI
- ONT
1 stop7h 29m
Delta
Deal found 4/28![Delta logo]()
$197
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 30, 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 30, 2026.
This Alaska Airlines deal was found by Cheapflights users on 4/29. 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.
Wed 6/37:48 pm
ONT
- BOI
Nonstop1h 59m
Alaska Airlines
Sat 6/64:14 pm
BOI
- ONT
Nonstop2h 03m
Alaska Airlines
Deal found 4/29![Alaska Airlines logo]()
$157
This Delta deal was found by Cheapflights users on 4/27. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/36:45 am
ONT
- BOI
1 stop6h 56m
Delta
Tue 6/96:10 pm
BOI
- ONT
1 stop5h 31m
Delta
Deal found 4/27![Delta logo]()
$167
This United Airlines deal was found by Cheapflights users on 4/28. 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.
Sat 7/41:50 pm
ONT
- BOI
1 stop5h 15m
United Airlines
Tue 7/77:05 pm
BOI
- ONT
1 stop4h 32m
United Airlines
Deal found 4/28![United Airlines logo]()
$257
This Southwest deal was found by Cheapflights users on 4/29. 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.
Sat 6/206:30 pm
ONT
- BOI
1 stop4h 25m
Southwest
Tue 6/303:00 pm
BOI
- ONT
1 stop6h 20m
Southwest
Deal found 4/29![Southwest logo]()
$297
This Alaska Airlines deal was found by Cheapflights users on 4/29. 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.
Wed 5/277:48 pm
ONT
- BOI
Nonstop1h 59m
Alaska Airlines
Wed 6/34:14 pm
BOI
- ONT
Nonstop2h 03m
Alaska Airlines
Deal found 4/29![Alaska Airlines logo]()
$157
This Kiwi.com deal was found by Cheapflights users on 4/26. Clicking the “Pick Dates” 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.
Sun 6/283:34 pm
ONT
- TWF
1 stop19h 26m
Multiple Airlines
Mon 7/61:45 pm
TWF
- ONT
2 stops23h 58m
Multiple Airlines
Deal found 4/26![Multiple Airlines logo]()
$338
This Alaska Airlines deal was found by Cheapflights users on 4/29. 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.
Wed 5/276:00 am
ONT
- BOI
1 stop6h 02m
Alaska Airlines
Sat 5/304:14 pm
BOI
- ONT
Nonstop2h 03m
Alaska Airlines
Deal found 4/29![Alaska Airlines logo]()
$247
This United Airlines deal was found by Cheapflights users on 4/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/286:00 am
ONT
- BOI
1 stop6h 08m
United Airlines
Mon 6/17:05 pm
BOI
- ONT
1 stop4h 32m
United Airlines
Deal found 4/26![United Airlines logo]()
$283
This Delta deal was found by Cheapflights users on 4/26. Clicking the “Pick Dates” 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 5/154:57 pm
ONT
- BOI
1 stop3h 47m
Delta
Sun 5/176:00 am
BOI
- ONT
1 stop3h 53m
Delta
Deal found 4/26![Delta logo]()
$322
This Southwest deal was found by Cheapflights users on 4/27. 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.
Tue 5/263:45 pm
ONT
- BOI
2 stops7h 40m
Southwest
Tue 6/26:40 am
BOI
- ONT
2 stops5h 55m
Southwest
Deal found 4/27![Southwest logo]()
$336
This Delta deal was found by Cheapflights users on 4/24. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/229:50 am
ONT
- JAC
1 stop6h 09m
Delta
Sun 5/245:59 pm
JAC
- ONT
1 stop5h 46m
Delta
Deal found 4/24![Delta logo]()
$329
This Alaska Airlines deal was found by Cheapflights users on 4/29. 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.
Wed 5/207:48 pm
ONT
- BOI
Nonstop1h 59m
Alaska Airlines
Sun 5/244:14 pm
BOI
- ONT
Nonstop2h 03m
Alaska Airlines
Deal found 4/29![Alaska Airlines logo]()
$327
This Southwest deal was found by Cheapflights users on 4/26. Clicking the “Pick Dates” 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 6/174:10 pm
ONT
- GEG
2 stops7h 55m
Southwest
Tue 6/235:00 am
GEG
- ONT
2 stops7h 55m
Southwest
Deal found 4/26![Southwest logo]()
$361
This Delta deal was found by Cheapflights users on 4/26. Clicking the “Pick Dates” 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 6/89:40 am
ONT
- JAC
1 stop6h 20m
Delta
Mon 6/156:05 pm
JAC
- ONT
1 stop6h 44m
Delta
Deal found 4/26![Delta logo]()
$329
This United Airlines deal was found by Cheapflights users on 4/28. 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 6/11:50 pm
ONT
- SUN
1 stop7h 01m
United Airlines
Sat 6/67:00 am
SUN
- ONT
1 stop6h 47m
United Airlines
Deal found 4/28![United Airlines logo]()
$369
This Alaska Airlines deal was found by Cheapflights users on 4/26. Clicking the “Pick Dates” 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 6/64:03 pm
ONT
- BOI
1 stop6h 55m
Alaska Airlines
Fri 6/122:31 pm
BOI
- ONT
Nonstop2h 07m
Alaska Airlines
Deal found 4/26![Alaska Airlines logo]()
$330
This United Airlines deal was found by Cheapflights users on 4/27. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/241:50 pm
ONT
- SUN
1 stop7h 01m
United Airlines
Sun 5/318:00 am
SUN
- ONT
1 stop5h 12m
United Airlines
Deal found 4/27![United Airlines logo]()
$369
This Delta deal was found by Cheapflights users on 4/26. Clicking the “Pick Dates” 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
- GEG
1 stop6h 28m
Delta
Tue 8/45:41 am
GEG
- ONT
1 stop6h 27m
Delta
Deal found 4/26![Delta logo]()
$361
This United Airlines deal was found by Cheapflights users on 4/27. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/211:50 pm
ONT
- SUN
1 stop7h 01m
United Airlines
Sun 5/248:00 am
SUN
- ONT
1 stop5h 12m
United Airlines
Deal found 4/27![United Airlines logo]()
$370
This Alaska Airlines deal was found by Cheapflights users on 4/28. 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 5/274:03 pm
ONT
- BOI
1 stop6h 55m
Alaska Airlines
Sun 5/316:35 am
BOI
- ONT
1 stop5h 35m
Alaska Airlines
Deal found 4/28![Alaska Airlines logo]()
$337
This Delta deal was found by Cheapflights users on 4/26. Clicking the “Pick Dates” 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 7/311:00 pm
ONT
- GEG
1 stop5h 13m
Delta
Tue 8/45:20 am
GEG
- ONT
1 stop5h 59m
Delta
Deal found 4/26![Delta logo]()
$361
This Alaska Airlines deal was found by Cheapflights users on 4/28. 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 6/26:00 am
ONT
- GEG
1 stop5h 42m
Alaska Airlines
Wed 6/39:08 am
GEG
- ONT
1 stop8h 09m
Alaska Airlines
Deal found 4/28![Alaska Airlines logo]()
$351
This Delta deal was found by Cheapflights users on 4/25. 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.
Fri 5/295:50 pm
ONT
- GEG
1 stop5h 01m
Delta
Sun 5/315:00 am
GEG
- ONT
1 stop6h 12m
Delta
Deal found 4/25![Delta logo]()
$368
This CheapOair deal was found by Cheapflights users on 4/24. 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.
Sat 8/84:18 pm
ONT
- GEG
1 stop5h 15m
Alaska Airlines
Tue 8/116:13 am
GEG
- ONT
1 stop6h 56m
Alaska Airlines
Deal found 4/24![Alaska Airlines logo]()
$356
This United Airlines deal was found by Cheapflights users on 4/26. Clicking the “Pick Dates” 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 6/145:00 am
ONT
- SUN
1 stop7h 47m
United Airlines
Fri 6/198:00 am
SUN
- ONT
1 stop5h 12m
United Airlines
Deal found 4/26![United Airlines logo]()
$433
This Delta deal was found by Cheapflights users on 4/26. Clicking the “Pick Dates” 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
- GEG
1 stop6h 28m
Delta
Sun 8/27:08 pm
GEG
- ONT
1 stop4h 40m
Delta
Deal found 4/26![Delta logo]()
$382
This United Airlines deal was found by Cheapflights users on 4/26. Clicking the “Pick Dates” 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 6/145:00 am
ONT
- SUN
1 stop7h 47m
United Airlines
Thu 6/188:00 am
SUN
- ONT
1 stop5h 12m
United Airlines
Deal found 4/26![United Airlines logo]()
$433
This Alaska Airlines deal was found by Cheapflights users on 4/27. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/314:18 pm
ONT
- GEG
1 stop5h 15m
Alaska Airlines
Mon 8/36:13 am
GEG
- ONT
1 stop5h 01m
Alaska Airlines
Deal found 4/27![Alaska Airlines logo]()
$361
This Delta deal was found by Cheapflights users on 4/24. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/216:00 am
ONT
- JAC
1 stop5h 20m
Delta
Sun 5/245:59 pm
JAC
- ONT
1 stop5h 46m
Delta
Deal found 4/24![Delta logo]()
$389
This Alaska Airlines deal was found by Cheapflights users on 4/24. 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.
Fri 5/297:41 pm
ONT
- GEG
1 stop12h 51m
Alaska Airlines
Mon 6/18:38 pm
GEG
- ONT
1 stop14h 32m
Alaska Airlines
Deal found 4/24![Alaska Airlines logo]()
$361
Last-minute flights from Ontario to IdahoDiscover last-minute flight deals from Ontario to Idaho. Data last updated April 30, 2026 and is based on user searches.
Discover last-minute flight deals from Ontario to Idaho. Data last updated April 30, 2026 and is based on user searches.
This Expedia deal was found by Cheapflights users on 4/27. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/1310:50 am
ONT
- BOI
1 stop24h 37m
Frontier
Sun 5/171:22 pm
BOI
- ONT
1 stop21h 43m
Frontier
Deal found 4/27![Frontier logo]()
$180
This Delta deal was found by Cheapflights users on 4/24. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/161:35 pm
ONT
- BOI
1 stop7h 38m
Delta
Sun 5/176:00 am
BOI
- ONT
1 stop3h 53m
Delta
Deal found 4/24![Delta logo]()
$198
This Expedia deal was found by Cheapflights users on 4/28. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/2410:50 am
ONT
- GEG
1 stop24h 48m
Frontier
Wed 5/2712:33 pm
GEG
- ONT
1 stop11h 16m
Frontier
Deal found 4/28![Frontier logo]()
$160
This Frontier deal was found by Cheapflights users on 4/28. 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.
Sun 5/246:00 am
ONT
- BOI
1 stop5h 30m
Frontier
Tue 6/21:25 pm
BOI
- ONT
1 stop11h 24m
Frontier
Deal found 4/28![Frontier logo]()
$160
This Alaska Airlines deal was found by Cheapflights users on 4/28. 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.
Sun 5/247:48 pm
ONT
- BOI
Nonstop1h 59m
Alaska Airlines
Tue 6/24:14 pm
BOI
- ONT
Nonstop2h 03m
Alaska Airlines
Deal found 4/28![Alaska Airlines logo]()
$187
This Alaska Airlines deal was found by Cheapflights users on 4/28. 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 5/267:48 pm
ONT
- BOI
Nonstop1h 59m
Alaska Airlines
Sat 5/304:14 pm
BOI
- ONT
Nonstop2h 03m
Alaska Airlines
Deal found 4/28![Alaska Airlines logo]()
$157
This Frontier deal was found by Cheapflights users on 4/27. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/266:00 am
ONT
- BOI
1 stop5h 30m
Frontier
Tue 6/21:25 pm
BOI
- ONT
1 stop11h 24m
Frontier
Deal found 4/27![Frontier logo]()
$185
This Expedia deal was found by Cheapflights users on 4/27. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/266:00 am
ONT
- BOI
1 stop5h 30m
Multiple Airlines
Wed 6/34:14 pm
BOI
- ONT
Nonstop2h 03m
Multiple Airlines
Deal found 4/27![Multiple Airlines logo]()
$194
This Alaska Airlines deal was found by Cheapflights users on 4/28. 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.
Thu 5/287:48 pm
ONT
- BOI
Nonstop1h 59m
Alaska Airlines
Sat 5/304:14 pm
BOI
- ONT
Nonstop2h 03m
Alaska Airlines
Deal found 4/28![Alaska Airlines logo]()
$177
This CheapOair deal was found by Cheapflights users on 4/26. Clicking the “Pick Dates” 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 5/2810:50 am
ONT
- GEG
1 stop24h 48m
Frontier
Mon 6/112:33 pm
GEG
- ONT
1 stop21h 32m
Frontier
Deal found 4/26![Frontier logo]()
$191
This Delta deal was found by Cheapflights users on 4/26. Clicking the “Pick Dates” 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 5/306:00 am
ONT
- BOI
1 stop5h 11m
Delta
Tue 6/911:55 am
BOI
- ONT
1 stop6h 24m
Delta
Deal found 4/26![Delta logo]()
$167
This Delta deal was found by Cheapflights users on 4/28. 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 5/305:55 pm
ONT
- BOI
1 stop4h 09m
Delta
Tue 6/210:39 am
BOI
- ONT
1 stop7h 29m
Delta
Deal found 4/28![Delta logo]()
$197
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 30, 2026.
Search for one-way flight options from Ontario to Idaho. Find affordable one-way fares based on user searches. Data last updated April 30, 2026.
This Super.com deal was found by Cheapflights users on 4/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/106:00 am
ONT
- BOI
1 stop5h 27m
Frontier
Deal found 4/26![Frontier logo]()
$89
This Frontier deal was found by Cheapflights users on 4/27. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/116:00 am
ONT
- GEG
1 stop5h 38m
Frontier
Deal found 4/27![Frontier logo]()
$90
This Frontier deal was found by Cheapflights users on 4/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 6/76:00 am
ONT
- BOI
1 stop5h 38m
Frontier
Deal found 4/26![Frontier logo]()
$90
This Super.com deal was found by Cheapflights users on 4/27. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/1310:50 am
ONT
- BOI
1 stop24h 37m
Frontier
Deal found 4/27![Frontier logo]()
$95
This Alaska Airlines deal was found by Cheapflights users on 4/27. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/277:48 pm
ONT
- BOI
Nonstop1h 59m
Alaska Airlines
Deal found 4/27![Alaska Airlines logo]()
$99
This Kiwi.com deal was found by Cheapflights users on 4/25. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/204:39 pm
ONT
- GEG
1 stop27h 16m
Multiple Airlines
Deal found 4/25![Multiple Airlines logo]()
$106
This Kiwi.com deal was found by Cheapflights users on 4/26. Clicking the “Pick Dates” 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.
Sun 5/104:04 pm
ONT
- IDA
1 stop22h 23m
Multiple Airlines
Deal found 4/26![Multiple Airlines logo]()
$109
This Alaska Airlines deal was found by Cheapflights users on 4/28. 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.
Sat 6/67:48 pm
ONT
- BOI
Nonstop1h 59m
Alaska Airlines
Deal found 4/28![Alaska Airlines logo]()
$109
This Frontier deal was found by Cheapflights users on 4/29. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/146:00 am
ONT
- BOI
1 stop5h 27m
Frontier
Deal found 4/29![Frontier logo]()
$111
This Kiwi.com deal was found by Cheapflights users on 4/27. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/2811:51 am
ONT
- GEG
1 stop8h 04m
Multiple Airlines
Deal found 4/27![Multiple Airlines logo]()
$114
This Frontier deal was found by Cheapflights users on 4/27. 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 Frontier 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
Deal found 4/27![Frontier logo]()
$115
This Frontier deal was found by Cheapflights users on 4/27. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 6/146:00 am
ONT
- BOI
1 stop5h 30m
Frontier
Deal found 4/27![Frontier logo]()
$115
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 30, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $157 (Alaska Airlines) |
One-way from | $89 (Super.com) |
Popular in | February |
Cheapest in | April |
Average price | $236 |
Good round-trip deal | $157 or less |
Good one-way deal | $158 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 30, 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
Quickest round-trip
OntarioBoise
ONT - BOI
ONTBOI
Ontario
Wed 6/3
7:48 pm-10:47 pm
Nonstop1h 59m
Boise Air Term. Gowen Fld
Sat 6/6
4:14 pm-5:17 pm
Nonstop2h 03m
$157
OntarioBoise
ONT - BOI
ONTBOI
Ontario
Wed 5/27
7:48 pm-10:47 pm
Nonstop1h 59m
Boise Air Term. Gowen Fld
Wed 6/3
4:14 pm-5:17 pm
Nonstop2h 03m
$157
OntarioBoise
ONT - BOI
ONTBOI
Ontario
Wed 6/3
6:45 am-2:41 pm
1 stop6h 56m
Boise Air Term. Gowen Fld
Tue 6/9
6:10 pm-10:41 pm
1 stop5h 31m
$167
OntarioBoise
ONT - BOI
ONTBOI
Ontario
Wed 5/27
6:00 am-1:02 pm
1 stop6h 02m
Boise Air Term. Gowen Fld
Sat 5/30
4:14 pm-5:17 pm
Nonstop2h 03m
$247
OntarioBoise
ONT - BOI
ONTBOI
Ontario
Sat 7/4
1:50 pm-8:05 pm
1 stop5h 15m
Boise Air Term. Gowen Fld
Tue 7/7
7:05 pm-10:37 pm
1 stop4h 32m
$257
OntarioBoise
ONT - BOI
ONTBOI
Ontario
Thu 5/28
6:00 am-1:08 pm
1 stop6h 08m
Boise Air Term. Gowen Fld
Mon 6/1
7:05 pm-10:37 pm
1 stop4h 32m
$283
OntarioBoise
ONT - BOI
ONTBOI
Ontario
Sat 6/20
6:30 pm-11:55 pm
1 stop4h 25m
Boise Air Term. Gowen Fld
Tue 6/30
3:00 pm-8:20 pm
1 stop6h 20m
$297
OntarioBoise
ONT - BOI
ONTBOI
Ontario
Fri 5/15
4:57 pm-9:44 pm
1 stop3h 47m
Boise Air Term. Gowen Fld
Sun 5/17
6:00 am-8:53 am
1 stop3h 53m
$322
OntarioBoise
ONT - BOI
ONTBOI
Ontario
Wed 5/20
7:48 pm-10:47 pm
Nonstop1h 59m
Boise Air Term. Gowen Fld
Sun 5/24
4:14 pm-5:17 pm
Nonstop2h 03m
$327
OntarioJackson
ONT - JAC
ONTJAC
Ontario
Fri 5/22
9:50 am-4:59 pm
1 stop6h 09m
Jackson Hole
Sun 5/24
5:59 pm-10:45 pm
1 stop5h 46m
$329
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-TWF
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-IDA
ONT-TWF
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 27 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.
What is the cheapest month to book a flight from Ontario to Idaho?
Currently, January is the cheapest month in which you can book a flight from Ontario to Idaho (average of $97). 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 April 30, 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 30, 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 30, 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.
Boarding
8.1
Comfort
8.0
Crew
8.6
Overall
8.0
Entertainment
7.5
Food
7.0
Reviews
1 / 20
10.0
ExcellentWilliam Drew,Nov 2025
SJC - HNL
Boarding
8.1
Comfort
8.0
Crew
8.6
Overall
8.0
Entertainment
7.5
Food
7.0
Reviews
1 / 20
10.0
ExcellentWilliam Drew,Nov 2025
SJC - HNL
Boarding
8.1
Comfort
8.0
Crew
8.6
Overall
8.0
Entertainment
7.5
Food
7.0
Reviews
1 / 20
10.0
ExcellentWilliam Drew,Nov 2025
SJC - HNL
Boarding
8.1
Comfort
8.0
Crew
8.6
Overall
8.0
Entertainment
7.5
Food
7.0
Reviews
1 / 20
10.0
ExcellentWilliam Drew,Nov 2025
SJC - HNL
Boarding
8.1
Comfort
8.0
Crew
8.6
Overall
8.0
Entertainment
7.5
Food
7.0
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 30, 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 30, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$97 | Average$248 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$153 | Average$391 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$176 | Average$353 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$196 | Average$319 | FlexibilityNo cancel fee | On-time69% |