$102+ 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 8/11. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — BOI
Jul 15 — Jul 221
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 June 15, 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 June 15, 2026.
This Alaska Airlines deal was found by Cheapflights users on 6/10. 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.
Tue 10/204:42 pm
ONT
- BOI
Nonstop2h 00m
Alaska Airlines
Sat 10/312:51 pm
BOI
- ONT
Nonstop2h 11m
Alaska Airlines
Deal found 6/10![Alaska Airlines logo]()
$177
This Alaska Airlines deal was found by Cheapflights users on 6/10. 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.
Tue 10/204:42 pm
ONT
- BOI
Nonstop2h 00m
Alaska Airlines
Thu 10/292:51 pm
BOI
- ONT
Nonstop2h 11m
Alaska Airlines
Deal found 6/10![Alaska Airlines logo]()
$187
This Alaska Airlines deal was found by Cheapflights users on 6/10. 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.
Thu 10/224:42 pm
ONT
- BOI
Nonstop2h 00m
Alaska Airlines
Thu 10/292:51 pm
BOI
- ONT
Nonstop2h 11m
Alaska Airlines
Deal found 6/10![Alaska Airlines logo]()
$197
This Delta deal was found by Cheapflights users on 6/10. 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.
Tue 10/206:00 am
ONT
- BOI
1 stop5h 17m
Delta
Wed 10/281:15 pm
BOI
- ONT
1 stop3h 57m
Delta
Deal found 6/10![Delta logo]()
$203
This Delta deal was found by Cheapflights users on 6/10. 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.
Sat 10/245:05 pm
ONT
- BOI
1 stop5h 59m
Delta
Wed 10/285:45 pm
BOI
- ONT
1 stop7h 03m
Delta
Deal found 6/10![Delta logo]()
$205
This Alaska Airlines deal was found by Cheapflights users on 6/10. 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.
Mon 10/194:42 pm
ONT
- BOI
Nonstop2h 00m
Alaska Airlines
Thu 10/292:51 pm
BOI
- ONT
Nonstop2h 11m
Alaska Airlines
Deal found 6/10![Alaska Airlines logo]()
$207
This Southwest deal was found by Cheapflights users on 6/10. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/29:05 am
ONT
- BOI
1 stop6h 05m
Southwest
Sun 9/611:35 am
BOI
- ONT
1 stop4h 10m
Southwest
Deal found 6/10![Southwest logo]()
$211
This Southwest deal was found by Cheapflights users on 6/10. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/12:10 pm
ONT
- BOI
2 stops7h 05m
Southwest
Sun 9/611:35 am
BOI
- ONT
1 stop4h 10m
Southwest
Deal found 6/10![Southwest logo]()
$216
This United Airlines deal was found by Cheapflights users on 6/10. 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.
Thu 8/276:00 am
ONT
- BOI
1 stop4h 04m
United Airlines
Mon 8/317:05 pm
BOI
- ONT
1 stop4h 54m
United Airlines
Deal found 6/10![United Airlines logo]()
$217
This Delta deal was found by Cheapflights users on 6/10. 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.
Tue 10/209:55 am
ONT
- BOI
1 stop5h 54m
Delta
Mon 10/265:45 pm
BOI
- ONT
1 stop7h 03m
Delta
Deal found 6/10![Delta logo]()
$220
This Delta deal was found by Cheapflights users on 6/10. 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.
Sat 10/245:05 pm
ONT
- BOI
1 stop5h 59m
Delta
Sun 10/255:45 pm
BOI
- ONT
1 stop7h 03m
Delta
Deal found 6/10![Delta logo]()
$222
This Alaska Airlines deal was found by Cheapflights users on 6/10. 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.
Sun 10/184:42 pm
ONT
- BOI
Nonstop2h 00m
Alaska Airlines
Tue 10/272:51 pm
BOI
- ONT
Nonstop2h 11m
Alaska Airlines
Deal found 6/10![Alaska Airlines logo]()
$227
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 June 15, 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 June 15, 2026.
This Delta deal was found by Cheapflights users on 6/10. 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.
Tue 10/139:55 am
ONT
- GEG
1 stop6h 11m
Delta
Wed 10/215:40 pm
GEG
- ONT
1 stop5h 03m
Delta
Deal found 6/10![Delta logo]()
$237
This Southwest deal was found by Cheapflights users on 6/10. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/135:45 pm
ONT
- BOI
1 stop4h 50m
Southwest
Mon 8/173:50 pm
BOI
- ONT
1 stop6h 55m
Southwest
Deal found 6/10![Southwest logo]()
$243
This United Airlines deal was found by Cheapflights users on 6/10. 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.
Sat 8/11:50 pm
ONT
- BOI
1 stop5h 15m
United Airlines
Tue 8/47:05 pm
BOI
- ONT
1 stop4h 32m
United Airlines
Deal found 6/10![United Airlines logo]()
$257
This Alaska Airlines deal was found by Cheapflights users on 6/10. 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.
Tue 8/116:02 am
ONT
- GEG
1 stop6h 27m
Alaska Airlines
Thu 8/138:53 am
GEG
- ONT
1 stop6h 45m
Alaska Airlines
Deal found 6/10![Alaska Airlines logo]()
$260
This Delta deal was found by Cheapflights users on 6/10. 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.
Tue 8/115:05 pm
ONT
- GEG
1 stop6h 21m
Delta
Tue 8/255:30 am
GEG
- ONT
1 stop6h 46m
Delta
Deal found 6/10![Delta logo]()
$237
This Delta deal was found by Cheapflights users on 6/10. 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.
Sat 8/83:35 pm
ONT
- GEG
1 stop6h 00m
Delta
Wed 8/1211:09 am
GEG
- ONT
1 stop6h 12m
Delta
Deal found 6/10![Delta logo]()
$260
This Alaska Airlines deal was found by Cheapflights users on 6/14. Clicking the “Pick Dates” 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 7/84:18 pm
ONT
- BOI
Nonstop1h 55m
Alaska Airlines
Sat 7/182:31 pm
BOI
- ONT
Nonstop2h 07m
Alaska Airlines
Deal found 6/14![Alaska Airlines logo]()
$317
This Southwest deal was found by Cheapflights users on 6/12. Clicking the “Pick Dates” 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 7/87:20 pm
ONT
- GEG
1 stop4h 50m
Southwest
Wed 7/155:00 am
GEG
- ONT
1 stop4h 05m
Southwest
Deal found 6/12![Southwest logo]()
$333
This Delta deal was found by Cheapflights users on 6/10. 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.
Thu 10/87:00 am
ONT
- GEG
1 stop6h 02m
Delta
Mon 10/195:40 pm
GEG
- ONT
1 stop5h 03m
Delta
Deal found 6/10![Delta logo]()
$283
This United Airlines deal was found by Cheapflights users on 6/11. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/291:50 pm
ONT
- BOI
1 stop6h 50m
United Airlines
Fri 7/37:05 pm
BOI
- ONT
1 stop4h 32m
United Airlines
Deal found 6/11![United Airlines logo]()
$362
This Delta deal was found by Cheapflights users on 6/10. 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.
Sat 8/85:05 pm
ONT
- GEG
1 stop5h 26m
Delta
Sat 8/155:40 pm
GEG
- ONT
1 stop5h 05m
Delta
Deal found 6/10![Delta logo]()
$283
This Southwest deal was found by Cheapflights users on 6/14. Clicking the “Pick Dates” 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 7/83:30 pm
ONT
- BOI
2 stops8h 00m
Southwest
Sat 7/1812:10 pm
BOI
- ONT
1 stop9h 15m
Southwest
Deal found 6/14![Southwest logo]()
$348
This Alaska Airlines deal was found by Cheapflights users on 6/14. Clicking the “Pick Dates” 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 8/79:20 pm
ONT
- GEG
1 stop11h 06m
Alaska Airlines
Mon 8/105:00 am
GEG
- ONT
1 stop4h 56m
Alaska Airlines
Deal found 6/14![Alaska Airlines logo]()
$361
This United Airlines deal was found by Cheapflights users on 6/12. Clicking the “Pick Dates” 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 11/145:00 am
ONT
- SUN
1 stop7h 44m
United Airlines
Wed 11/182:29 pm
SUN
- ONT
1 stop6h 51m
United Airlines
Deal found 6/12![United Airlines logo]()
$369
This Southwest deal was found by Cheapflights users on 6/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/249:55 am
ONT
- GEG
1 stop5h 05m
Southwest
Sat 8/298:00 am
GEG
- ONT
1 stop7h 15m
Southwest
Deal found 6/14![Southwest logo]()
$361
This Delta deal was found by Cheapflights users on 6/10. 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.
Thu 8/135:05 pm
ONT
- GEG
1 stop6h 48m
Delta
Fri 8/145:40 pm
GEG
- ONT
1 stop5h 05m
Delta
Deal found 6/10![Delta logo]()
$306
This Alaska Airlines deal was found by Cheapflights users on 6/13. Clicking the “Pick Dates” 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 7/197:00 am
ONT
- IDA
1 stop5h 06m
Alaska Airlines
Tue 7/217:15 am
IDA
- ONT
1 stop6h 54m
Alaska Airlines
Deal found 6/13![Alaska Airlines logo]()
$374
This Southwest deal was found by Cheapflights users on 6/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/197:00 pm
ONT
- BOI
1 stop5h 25m
Southwest
Sun 7/266:15 am
BOI
- ONT
1 stop6h 00m
Southwest
Deal found 6/13![Southwest logo]()
$367
This United Airlines deal was found by Cheapflights users on 6/12. Clicking the “Pick Dates” 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 7/111:18 pm
ONT
- JAC
1 stop6h 40m
United Airlines
Tue 7/148:00 am
JAC
- ONT
1 stop5h 12m
United Airlines
Deal found 6/12![United Airlines logo]()
$409
This Delta deal was found by Cheapflights users on 6/14. Clicking the “Pick Dates” 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 10/265:05 pm
ONT
- IDA
1 stop4h 14m
Delta
Thu 10/296:45 pm
IDA
- ONT
1 stop6h 03m
Delta
Deal found 6/14![Delta logo]()
$319
This Alaska Airlines deal was found by Cheapflights users on 6/12. Clicking the “Pick Dates” 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 11/145:52 pm
ONT
- SUN
2 stops15h 59m
Alaska Airlines
Wed 11/1811:33 am
SUN
- ONT
1 stop7h 55m
Alaska Airlines
Deal found 6/12![Alaska Airlines logo]()
$401
This Southwest deal was found by Cheapflights users on 6/14. Clicking the “Pick Dates” 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 8/2511:10 am
ONT
- GEG
1 stop3h 55m
Southwest
Fri 8/281:50 pm
GEG
- ONT
2 stops8h 15m
Southwest
Deal found 6/14![Southwest logo]()
$368
This Delta deal was found by Cheapflights users on 6/13. Clicking the “Pick Dates” 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 7/185:10 pm
ONT
- IDA
1 stop4h 22m
Delta
Tue 7/217:00 pm
IDA
- ONT
1 stop5h 48m
Delta
Deal found 6/13![Delta logo]()
$319
This United Airlines deal was found by Cheapflights users on 6/13. Clicking the “Pick Dates” 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 7/251:50 pm
ONT
- JAC
1 stop6h 40m
United Airlines
Thu 7/308:00 am
JAC
- ONT
1 stop5h 12m
United Airlines
Deal found 6/13![United Airlines logo]()
$451
This Alaska Airlines deal was found by Cheapflights users on 6/10. 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.
Sat 7/185:32 pm
ONT
- IDA
1 stop18h 34m
Alaska Airlines
Thu 7/234:14 pm
IDA
- ONT
1 stop8h 38m
Alaska Airlines
Deal found 6/10![Alaska Airlines logo]()
$413
This Southwest deal was found by Cheapflights users on 6/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/64:40 pm
ONT
- GEG
2 stops6h 50m
Southwest
Fri 7/105:10 pm
GEG
- ONT
1 stop6h 25m
Southwest
Deal found 6/12![Southwest logo]()
$386
This Delta deal was found by Cheapflights users on 6/12. Clicking the “Pick Dates” 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 7/89:40 am
ONT
- JAC
1 stop6h 20m
Delta
Tue 7/146:05 pm
JAC
- ONT
1 stop6h 43m
Delta
Deal found 6/12![Delta logo]()
$329
This United Airlines deal was found by Cheapflights users on 6/10. 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.
Sat 7/181:50 pm
ONT
- JAC
1 stop6h 40m
United Airlines
Tue 7/218:00 am
JAC
- ONT
1 stop5h 12m
United Airlines
Deal found 6/10![United Airlines logo]()
$451
This Alaska Airlines deal was found by Cheapflights users on 6/12. Clicking the “Pick Dates” 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 6/287:00 am
ONT
- IDA
1 stop5h 06m
Alaska Airlines
Fri 7/37:15 am
IDA
- ONT
1 stop6h 54m
Alaska Airlines
Deal found 6/12![Alaska Airlines logo]()
$414
This Southwest deal was found by Cheapflights users on 6/11. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/296:35 pm
ONT
- BOI
2 stops5h 35m
Southwest
Fri 7/312:20 pm
BOI
- ONT
1 stop6h 40m
Southwest
Deal found 6/11![Southwest logo]()
$397
Last-minute flights from Ontario to IdahoDiscover last-minute flight deals from Ontario to Idaho. Data last updated June 15, 2026 and is based on user searches.
Discover last-minute flight deals from Ontario to Idaho. Data last updated June 15, 2026 and is based on user searches.
This Frontier deal was found by Cheapflights users on 6/12. Clicking the “Pick Dates” 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 7/56:00 am
ONT
- BOI
1 stop5h 29m
Frontier
Thu 7/91:24 pm
BOI
- ONT
1 stop11h 26m
Frontier
Deal found 6/12![Frontier logo]()
$248
This Expedia deal was found by Cheapflights users on 6/14. Clicking the “Pick Dates” 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 7/76:00 am
ONT
- BOI
1 stop5h 29m
Frontier
Thu 7/91:24 pm
BOI
- ONT
1 stop11h 26m
Frontier
Deal found 6/14![Frontier logo]()
$263
This CheapOair deal was found by Cheapflights users on 6/10. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/810:49 am
ONT
- BOI
1 stop24h 40m
Frontier
Tue 7/141:24 pm
BOI
- ONT
1 stop11h 26m
Frontier
Deal found 6/10![Frontier logo]()
$294
This Frontier deal was found by Cheapflights users on 6/10. 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.
Tue 7/146:00 am
ONT
- BOI
1 stop5h 29m
Frontier
Tue 7/211:24 pm
BOI
- ONT
1 stop11h 26m
Frontier
Deal found 6/10![Frontier logo]()
$258
This Priceline deal was found by Cheapflights users on 6/11. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/146:00 am
ONT
- BOI
1 stop5h 29m
Multiple Airlines
Fri 7/172:31 pm
BOI
- ONT
Nonstop2h 07m
Multiple Airlines
Deal found 6/11![Multiple Airlines logo]()
$303
This CheapOair deal was found by Cheapflights users on 6/12. Clicking the “Pick Dates” 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 7/1510:49 am
ONT
- BOI
1 stop24h 40m
Frontier
Tue 7/211:24 pm
BOI
- ONT
1 stop11h 26m
Frontier
Deal found 6/12![Frontier logo]()
$296
This Frontier deal was found by Cheapflights users on 6/12. Clicking the “Pick Dates” 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 7/166:00 am
ONT
- BOI
1 stop5h 29m
Frontier
Tue 7/211:24 pm
BOI
- ONT
1 stop11h 26m
Frontier
Deal found 6/12![Frontier logo]()
$267
This Delta deal was found by Cheapflights users on 6/11. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/171:00 pm
ONT
- BOI
1 stop3h 51m
Delta
Mon 8/176:00 am
BOI
- ONT
1 stop3h 52m
Delta
Deal found 6/11![Delta logo]()
$275
This Booking.com deal was found by Cheapflights users on 6/12. Clicking the “Pick Dates” 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 7/2010:49 am
ONT
- BOI
1 stop24h 40m
Frontier
Thu 7/231:24 pm
BOI
- ONT
1 stop11h 26m
Frontier
Deal found 6/12![Frontier logo]()
$260
This CheapOair deal was found by Cheapflights users on 6/12. Clicking the “Pick Dates” 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 7/2910:49 am
ONT
- BOI
1 stop24h 40m
Frontier
Sun 8/91:24 pm
BOI
- ONT
1 stop21h 40m
Frontier
Deal found 6/12![Frontier logo]()
$277
This CheapOair deal was found by Cheapflights users on 6/12. Clicking the “Pick Dates” 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 7/294:18 pm
ONT
- BOI
Nonstop1h 55m
Alaska Airlines
Mon 8/32:31 pm
BOI
- ONT
Nonstop2h 07m
Alaska Airlines
Deal found 6/12![Alaska Airlines logo]()
$287
This Kiwi.com deal was found by Cheapflights users on 6/14. Clicking the “Pick Dates” 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 7/303:40 pm
ONT
- IDA
1 stop23h 20m
Multiple Airlines
Mon 8/310:47 pm
IDA
- ONT
1 stop10h 16m
Multiple Airlines
Deal found 6/14![Multiple Airlines logo]()
$303
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 June 15, 2026.
Search for one-way flight options from Ontario to Idaho. Find affordable one-way fares based on user searches. Data last updated June 15, 2026.
This Delta deal was found by Cheapflights users on 6/11. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/115:05 pm
ONT
- BOI
1 stop5h 54m
Delta
Deal found 6/11![Delta logo]()
$102
This Southwest deal was found by Cheapflights users on 6/11. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/112:10 pm
ONT
- BOI
2 stops7h 05m
Southwest
Deal found 6/11![Southwest logo]()
$108
This United Airlines deal was found by Cheapflights users on 6/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/216:08 am
ONT
- BOI
1 stop3h 56m
United Airlines
Deal found 6/12![United Airlines logo]()
$109
This Kiwi.com deal was found by Cheapflights users on 6/13. Clicking the “Pick Dates” 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.
Sat 7/253:40 pm
ONT
- GEG
1 stop28h 21m
Multiple Airlines
Deal found 6/13![Multiple Airlines logo]()
$117
This Booking.com deal was found by Cheapflights users on 6/10. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/26:00 am
ONT
- GEG
1 stop6h 30m
Alaska Airlines
Deal found 6/10![Alaska Airlines logo]()
$119
This Priceline deal was found by Cheapflights users on 6/10. 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.
Wed 9/94:50 pm
ONT
- BOI
Nonstop1h 55m
Alaska Airlines
Deal found 6/10![Alaska Airlines logo]()
$119
This Southwest deal was found by Cheapflights users on 6/10. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/135:45 pm
ONT
- BOI
1 stop4h 50m
Southwest
Deal found 6/10![Southwest logo]()
$122
This Super.com deal was found by Cheapflights users on 6/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/76:00 am
ONT
- BOI
1 stop5h 29m
Frontier
Deal found 6/13![Frontier logo]()
$127
This Frontier deal was found by Cheapflights users on 6/10. 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.
Thu 8/206:00 am
ONT
- BOI
1 stop5h 09m
Frontier
Deal found 6/10![Frontier logo]()
$129
This Super.com deal was found by Cheapflights users on 6/12. Clicking the “Pick Dates” 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.
Thu 7/166:00 am
ONT
- BOI
1 stop5h 29m
Frontier
Deal found 6/12![Frontier logo]()
$131
This Super.com deal was found by Cheapflights users on 6/14. Clicking the “Pick Dates” 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 8/1210:49 am
ONT
- BOI
1 stop24h 40m
Frontier
Deal found 6/14![Frontier logo]()
$133
This Frontier deal was found by Cheapflights users on 6/11. 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 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 6/11![Frontier logo]()
$134
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 June 15, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $177 (Alaska Airlines) |
One-way from | $102 (Delta) |
Popular in | February |
Cheapest in | April |
Average price | $367 |
Good round-trip deal | $317 or less |
Good one-way deal | $212 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 June 15, 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
OntarioSpokane
ONT - GEG
ONTGEG
Ontario
Tue 10/13
9:55 am-4:06 pm
1 stop6h 11m
Spokane
Wed 10/21
5:40 pm-10:43 pm
1 stop5h 03m
$237
OntarioSpokane
ONT - GEG
ONTGEG
Ontario
Tue 8/11
5:05 pm-11:26 pm
1 stop6h 21m
Spokane
Tue 8/25
5:30 am-12:16 pm
1 stop6h 46m
$237
OntarioBoise
ONT - BOI
ONTBOI
Ontario
Thu 8/13
5:45 pm-11:35 pm
1 stop4h 50m
Boise Air Term. Gowen Fld
Mon 8/17
3:50 pm-9:45 pm
1 stop6h 55m
$243
OntarioBoise
ONT - BOI
ONTBOI
Ontario
Sat 8/1
1:50 pm-8:05 pm
1 stop5h 15m
Boise Air Term. Gowen Fld
Tue 8/4
7:05 pm-10:37 pm
1 stop4h 32m
$257
OntarioSpokane
ONT - GEG
ONTGEG
Ontario
Tue 8/11
6:02 am-12:29 pm
1 stop6h 27m
Spokane
Thu 8/13
8:53 am-3:38 pm
1 stop6h 45m
$260
OntarioSpokane
ONT - GEG
ONTGEG
Ontario
Sat 8/8
3:35 pm-9:35 pm
1 stop6h 00m
Spokane
Wed 8/12
11:09 am-5:21 pm
1 stop6h 12m
$260
OntarioSpokane
ONT - GEG
ONTGEG
Ontario
Thu 10/8
7:00 am-1:02 pm
1 stop6h 02m
Spokane
Mon 10/19
5:40 pm-10:43 pm
1 stop5h 03m
$283
OntarioSpokane
ONT - GEG
ONTGEG
Ontario
Sat 8/8
5:05 pm-10:31 pm
1 stop5h 26m
Spokane
Sat 8/15
5:40 pm-10:45 pm
1 stop5h 05m
$283
OntarioSpokane
ONT - GEG
ONTGEG
Ontario
Thu 8/13
5:05 pm-11:53 pm
1 stop6h 48m
Spokane
Fri 8/14
5:40 pm-10:45 pm
1 stop5h 05m
$306
Quickest round-trip
OntarioBoise
ONT - BOI
ONTBOI
Ontario
Wed 7/8
4:18 pm-7:13 pm
Nonstop1h 55m
Boise Air Term. Gowen Fld
Sat 7/18
2:31 pm-3:38 pm
Nonstop2h 07m
$317
Showing 1-10 of 60 resultsSorted by cheapest first
Best time to book a flight from Ontario to Idaho
Have a flexible travel schedule? Discover the best time to fly to Idaho from Ontario with our price prediction graph.
ONT-GEG
ONT-BOI
ONT-SUN
ONT-JAC
ONT-IDA
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.
Cheapflights Insights
Everything you need to know about your flight from Ontario to Idaho
ONT-USID
ONT-GEG
ONT-BOI
ONT-SUN
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 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 June 15, 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 June 15, 2026.
The most flights from ONT to USID are scheduled on a Monday (1 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (1 on average).
How much does it cost to fly round-trip from Ontario to Idaho?
How far ahead should I book a flight from Ontario to Idaho?
To ensure you get the cheapest price possible for a flight from Ontario to Idaho, you should look to book at least 74 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 June 15, 2026.
See what other customers who have flown with Alaska Airlines,Southwest, andDelta from Ontario to Idaho have to say. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Food
7.1
Entertainment
7.0
Boarding
8.1
Crew
8.5
Overall
7.9
Comfort
7.8
Reviews
1 / 20
10.0
ExcellentFranzi,Mar 2026
SFO - PDX
Food
7.1
Entertainment
7.0
Boarding
8.1
Crew
8.5
Overall
7.9
Comfort
7.8
Reviews
1 / 20
10.0
ExcellentFranzi,Mar 2026
SFO - PDX
Food
7.1
Entertainment
7.0
Boarding
8.1
Crew
8.5
Overall
7.9
Comfort
7.8
Reviews
1 / 20
10.0
ExcellentFranzi,Mar 2026
SFO - PDX
Food
7.1
Entertainment
7.0
Boarding
8.1
Crew
8.5
Overall
7.9
Comfort
7.8
Reviews
1 / 20
10.0
ExcellentFranzi,Mar 2026
SFO - PDX
Food
7.1
Entertainment
7.0
Boarding
8.1
Crew
8.5
Overall
7.9
Comfort
7.8
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 June 15, 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 June 15, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$117 | Average$277 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$168 | Average$359 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$169 | Average$325 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$196 | Average$306 | FlexibilityNo cancel fee | On-time69% |