$94+ 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 8/25. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — BOI
Aug 20 — Aug 271
Round-trip
1 adult, Economy
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Cheapest flights from Ontario to IdahoExplore the most affordable flight options available from Ontario to Idaho. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 21, 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 21, 2026.
This Alaska Airlines deal was found by Cheapflights users on 7/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/294:50 pm
ONT
- BOI
Nonstop1h 55m
Alaska Airlines
Tue 9/13:02 pm
BOI
- ONT
Nonstop2h 08m
Alaska Airlines
Deal found 7/16![Alaska Airlines logo]()
$177
This Southwest deal was found by Cheapflights users on 7/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/225:40 am
ONT
- BOI
1 stop5h 35m
Southwest
Tue 8/256:00 am
BOI
- ONT
1 stop3h 55m
Southwest
Deal found 7/20![Southwest logo]()
$187
This CheapOair deal was found by Cheapflights users on 7/18. Clicking the “Pick Dates” 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 10/224:42 pm
ONT
- BOI
Nonstop2h 00m
Alaska Airlines
Tue 10/272:51 pm
BOI
- ONT
Nonstop2h 11m
Alaska Airlines
Deal found 7/18![Alaska Airlines logo]()
$195
This Delta deal was found by Cheapflights users on 7/17. Clicking the “Pick Dates” 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 7/17![Delta logo]()
$198
This Vliegwinkel deal was found by Cheapflights users on 7/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Vliegwinkel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/227:12 am
ONT
- BOI
1 stop5h 09m
Alaska Airlines
Sun 8/236:00 am
BOI
- ONT
1 stop4h 51m
Alaska Airlines
Deal found 7/19![Alaska Airlines logo]()
$200
This Southwest deal was found by Cheapflights users on 7/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/252:10 pm
ONT
- BOI
2 stops7h 05m
Southwest
Fri 8/287:30 am
BOI
- ONT
1 stop6h 55m
Southwest
Deal found 7/20![Southwest logo]()
$202
This Booking.com deal was found by Cheapflights users on 7/19. Clicking the “Pick Dates” 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 8/214:50 pm
ONT
- BOI
Nonstop1h 55m
Alaska Airlines
Mon 8/243:02 pm
BOI
- ONT
Nonstop2h 08m
Alaska Airlines
Deal found 7/19![Alaska Airlines logo]()
$203
This Orbitz deal was found by Cheapflights users on 7/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Orbitz 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
Mon 10/262:51 pm
BOI
- ONT
Nonstop2h 11m
Alaska Airlines
Deal found 7/17![Alaska Airlines logo]()
$205
This Southwest deal was found by Cheapflights users on 7/16. Clicking the “Pick Dates” 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 8/274:50 pm
ONT
- BOI
1 stop6h 05m
Southwest
Mon 8/317:30 am
BOI
- ONT
1 stop6h 55m
Southwest
Deal found 7/16![Southwest logo]()
$207
This Southwest deal was found by Cheapflights users on 7/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/216:30 pm
ONT
- BOI
1 stop3h 20m
Southwest
Mon 8/241:55 pm
BOI
- ONT
2 stops6h 30m
Southwest
Deal found 7/18![Southwest logo]()
$208
This Kiwi.com deal was found by Cheapflights users on 7/16. Clicking the “Pick Dates” 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 8/253:13 pm
ONT
- GEG
2 stops42h 09m
Multiple Airlines
Sun 8/3010:12 am
GEG
- ONT
1 stop21h 51m
Multiple Airlines
Deal found 7/16![Multiple Airlines logo]()
$254
This Delta deal was found by Cheapflights users on 7/16. Clicking the “Pick Dates” 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 8/296:00 am
ONT
- TWF
1 stop5h 23m
Delta
Sat 9/51:17 pm
TWF
- ONT
1 stop4h 07m
Delta
Deal found 7/16![Delta logo]()
$276
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 21, 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 21, 2026.
This Delta deal was found by Cheapflights users on 7/17. Clicking the “Pick Dates” 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 9/55:05 pm
ONT
- BOI
1 stop4h 41m
Delta
Wed 9/96:44 pm
BOI
- ONT
1 stop4h 20m
Delta
Deal found 7/17![Delta logo]()
$187
This Southwest deal was found by Cheapflights users on 7/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/225:40 am
ONT
- BOI
1 stop5h 35m
Southwest
Tue 8/256:00 am
BOI
- ONT
1 stop3h 55m
Southwest
Deal found 7/20![Southwest logo]()
$187
This Alaska Airlines deal was found by Cheapflights users on 7/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/294:50 pm
ONT
- BOI
Nonstop1h 55m
Alaska Airlines
Tue 9/14:28 pm
BOI
- ONT
1 stop4h 56m
Alaska Airlines
Deal found 7/16![Alaska Airlines logo]()
$197
This United Airlines deal was found by Cheapflights users on 7/19. Clicking the “Pick Dates” 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 11/16:00 am
ONT
- BOI
1 stop4h 14m
United Airlines
Wed 11/48:22 am
BOI
- ONT
1 stop4h 39m
United Airlines
Deal found 7/19![United Airlines logo]()
$207
This Southwest deal was found by Cheapflights users on 7/16. Clicking the “Pick Dates” 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 9/159:05 am
ONT
- BOI
1 stop6h 05m
Southwest
Sat 9/1912:55 pm
BOI
- ONT
2 stops8h 10m
Southwest
Deal found 7/16![Southwest logo]()
$192
This Delta deal was found by Cheapflights users on 7/17. Clicking the “Pick Dates” 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 7/17![Delta logo]()
$198
This Southwest deal was found by Cheapflights users on 7/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/44:50 pm
ONT
- BOI
1 stop6h 05m
Southwest
Sat 9/511:35 am
BOI
- ONT
1 stop3h 40m
Southwest
Deal found 7/20![Southwest logo]()
$197
This Southwest deal was found by Cheapflights users on 7/16. Clicking the “Pick Dates” 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 11/55:35 am
ONT
- BOI
1 stop5h 15m
Southwest
Mon 11/95:35 pm
BOI
- ONT
1 stop6h 20m
Southwest
Deal found 7/16![Southwest logo]()
$207
This Southwest deal was found by Cheapflights users on 7/18. Clicking the “Pick Dates” 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 10/236:55 pm
ONT
- BOI
1 stop5h 45m
Southwest
Mon 10/266:50 am
BOI
- ONT
1 stop5h 25m
Southwest
Deal found 7/18![Southwest logo]()
$207
This Delta deal was found by Cheapflights users on 7/16. Clicking the “Pick Dates” 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 8/296:00 am
ONT
- TWF
1 stop5h 23m
Delta
Sat 9/51:17 pm
TWF
- ONT
1 stop4h 07m
Delta
Deal found 7/16![Delta logo]()
$276
This Southwest deal was found by Cheapflights users on 7/17. Clicking the “Pick Dates” 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 10/165:20 am
ONT
- BOI
2 stops7h 00m
Southwest
Mon 10/196:50 pm
BOI
- ONT
2 stops6h 05m
Southwest
Deal found 7/17![Southwest logo]()
$217
This Priceline deal was found by Cheapflights users on 7/15. Clicking the “Pick Dates” 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.
Mon 8/105:26 pm
ONT
- GEG
1 stop6h 33m
Alaska Airlines
Tue 8/255:52 am
GEG
- ONT
1 stop5h 12m
Alaska Airlines
Deal found 7/15![Alaska Airlines logo]()
$333
This United Airlines deal was found by Cheapflights users on 7/17. Clicking the “Pick Dates” 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.
Wed 8/55:00 am
ONT
- GEG
1 stop7h 37m
United Airlines
Sat 8/86:00 am
GEG
- ONT
1 stop6h 12m
United Airlines
Deal found 7/17![United Airlines logo]()
$349
This Priceline deal was found by Cheapflights users on 7/15. Clicking the “Pick Dates” 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.
Mon 8/1012:04 pm
ONT
- GEG
1 stop6h 56m
Alaska Airlines
Tue 8/188:53 am
GEG
- ONT
1 stop6h 45m
Alaska Airlines
Deal found 7/15![Alaska Airlines logo]()
$333
This Delta deal was found by Cheapflights users on 7/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/196:00 am
ONT
- TWF
1 stop3h 47m
Delta
Wed 8/266:16 am
TWF
- ONT
1 stop3h 36m
Delta
Deal found 7/20![Delta logo]()
$312
This Southwest deal was found by Cheapflights users on 7/19. Clicking the “Pick Dates” 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 10/185:10 pm
ONT
- BOI
1 stop7h 45m
Southwest
Wed 10/216:35 am
BOI
- ONT
2 stops6h 25m
Southwest
Deal found 7/19![Southwest logo]()
$243
This Delta deal was found by Cheapflights users on 7/16. Clicking the “Pick Dates” 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 8/125:05 pm
ONT
- GEG
1 stop6h 21m
Delta
Thu 8/137:15 pm
GEG
- ONT
1 stop4h 19m
Delta
Deal found 7/16![Delta logo]()
$333
This United Airlines deal was found by Cheapflights users on 7/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/35:00 am
ONT
- WYS
1 stop7h 30m
United Airlines
Sat 10/102:05 pm
WYS
- ONT
1 stop7h 53m
United Airlines
Deal found 7/17![United Airlines logo]()
$421
This Delta deal was found by Cheapflights users on 7/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/106:01 pm
ONT
- GEG
1 stop5h 58m
Delta
Thu 8/134:20 pm
GEG
- ONT
1 stop6h 25m
Delta
Deal found 7/16![Delta logo]()
$333
This Alaska Airlines deal was found by Cheapflights users on 7/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 1/912:00 pm
ONT
- SUN
1 stop5h 08m
Alaska Airlines
Wed 1/1310:20 am
SUN
- ONT
1 stop5h 27m
Alaska Airlines
Deal found 7/20![Alaska Airlines logo]()
$417
This United Airlines deal was found by Cheapflights users on 7/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/16:00 am
ONT
- JAC
1 stop6h 57m
United Airlines
Sat 12/52:40 pm
JAC
- ONT
1 stop6h 40m
United Airlines
Deal found 7/19![United Airlines logo]()
$429
This Delta deal was found by Cheapflights users on 7/16. Clicking the “Pick Dates” 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
Wed 8/125:15 am
GEG
- ONT
1 stop6h 01m
Delta
Deal found 7/16![Delta logo]()
$333
This United Airlines deal was found by Cheapflights users on 7/18. Clicking the “Pick Dates” 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 8/131:18 pm
ONT
- JAC
1 stop6h 22m
United Airlines
Tue 8/184:25 pm
JAC
- ONT
1 stop5h 28m
United Airlines
Deal found 7/18![United Airlines logo]()
$429
This Southwest deal was found by Cheapflights users on 7/16. Clicking the “Pick Dates” 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 9/111:10 am
ONT
- GEG
1 stop3h 55m
Southwest
Wed 9/96:15 am
GEG
- ONT
2 stops7h 20m
Southwest
Deal found 7/16![Southwest logo]()
$334
This Alaska Airlines deal was found by Cheapflights users on 7/16. Clicking the “Pick Dates” 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 9/217:59 pm
ONT
- IDA
1 stop18h 21m
Alaska Airlines
Wed 9/232:01 pm
IDA
- ONT
1 stop6h 02m
Alaska Airlines
Deal found 7/16![Alaska Airlines logo]()
$459
This Delta deal was found by Cheapflights users on 7/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/16:00 am
ONT
- JAC
1 stop5h 12m
Delta
Sat 12/57:15 am
JAC
- ONT
1 stop6h 15m
Delta
Deal found 7/20![Delta logo]()
$349
This United Airlines deal was found by Cheapflights users on 7/16. Clicking the “Pick Dates” 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 8/31:49 pm
ONT
- JAC
1 stop6h 41m
United Airlines
Thu 8/68:00 am
JAC
- ONT
1 stop5h 12m
United Airlines
Deal found 7/16![United Airlines logo]()
$429
This Delta deal was found by Cheapflights users on 7/18. Clicking the “Pick Dates” 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
- JAC
1 stop5h 17m
Delta
Sat 9/195:55 pm
JAC
- ONT
1 stop5h 09m
Delta
Deal found 7/18![Delta logo]()
$349
This Alaska Airlines deal was found by Cheapflights users on 7/15. Clicking the “Pick Dates” 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 8/127:00 am
ONT
- IDA
1 stop5h 06m
Alaska Airlines
Tue 8/187:15 am
IDA
- ONT
1 stop6h 54m
Alaska Airlines
Deal found 7/15![Alaska Airlines logo]()
$466
This United Airlines deal was found by Cheapflights users on 7/17. Clicking the “Pick Dates” 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 10/295:00 am
ONT
- JAC
1 stop7h 29m
United Airlines
Tue 11/32:40 pm
JAC
- ONT
1 stop7h 16m
United Airlines
Deal found 7/17![United Airlines logo]()
$429
Last-minute flights from Ontario to IdahoDiscover last-minute flight deals from Ontario to Idaho. Data last updated July 21, 2026 and is based on user searches.
Discover last-minute flight deals from Ontario to Idaho. Data last updated July 21, 2026 and is based on user searches.
This Booking.com deal was found by Cheapflights users on 7/19. Clicking the “Pick Dates” 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 8/214:50 pm
ONT
- BOI
Nonstop1h 55m
Alaska Airlines
Mon 8/243:02 pm
BOI
- ONT
Nonstop2h 08m
Alaska Airlines
Deal found 7/19![Alaska Airlines logo]()
$203
This Southwest deal was found by Cheapflights users on 7/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/216:30 pm
ONT
- BOI
1 stop3h 20m
Southwest
Mon 8/241:55 pm
BOI
- ONT
2 stops6h 30m
Southwest
Deal found 7/18![Southwest logo]()
$208
This Delta deal was found by Cheapflights users on 7/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/211:06 pm
ONT
- BOI
1 stop3h 49m
Delta
Mon 8/246:45 pm
BOI
- ONT
1 stop5h 49m
Delta
Deal found 7/21![Delta logo]()
$217
This Southwest deal was found by Cheapflights users on 7/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/225:40 am
ONT
- BOI
1 stop5h 35m
Southwest
Tue 8/256:00 am
BOI
- ONT
1 stop3h 55m
Southwest
Deal found 7/20![Southwest logo]()
$187
This Southwest deal was found by Cheapflights users on 7/17. Clicking the “Pick Dates” 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 8/228:35 am
ONT
- BOI
1 stop5h 10m
Southwest
Mon 8/247:00 am
BOI
- ONT
1 stop4h 20m
Southwest
Deal found 7/17![Southwest logo]()
$197
This Delta deal was found by Cheapflights users on 7/17. Clicking the “Pick Dates” 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 7/17![Delta logo]()
$198
This Vliegwinkel deal was found by Cheapflights users on 7/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Vliegwinkel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/227:12 am
ONT
- BOI
1 stop5h 09m
Alaska Airlines
Sun 8/236:00 am
BOI
- ONT
1 stop4h 51m
Alaska Airlines
Deal found 7/19![Alaska Airlines logo]()
$200
This Southwest deal was found by Cheapflights users on 7/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/252:10 pm
ONT
- BOI
2 stops7h 05m
Southwest
Fri 8/287:30 am
BOI
- ONT
1 stop6h 55m
Southwest
Deal found 7/20![Southwest logo]()
$202
This Kiwi.com deal was found by Cheapflights users on 7/16. Clicking the “Pick Dates” 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 8/253:13 pm
ONT
- GEG
2 stops42h 09m
Multiple Airlines
Sun 8/3010:12 am
GEG
- ONT
1 stop21h 51m
Multiple Airlines
Deal found 7/16![Multiple Airlines logo]()
$254
This Southwest deal was found by Cheapflights users on 7/16. Clicking the “Pick Dates” 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 8/274:50 pm
ONT
- BOI
1 stop6h 05m
Southwest
Mon 8/317:30 am
BOI
- ONT
1 stop6h 55m
Southwest
Deal found 7/16![Southwest logo]()
$207
This Alaska Airlines deal was found by Cheapflights users on 7/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/294:50 pm
ONT
- BOI
Nonstop1h 55m
Alaska Airlines
Tue 9/13:02 pm
BOI
- ONT
Nonstop2h 08m
Alaska Airlines
Deal found 7/16![Alaska Airlines logo]()
$177
This Delta deal was found by Cheapflights users on 7/16. Clicking the “Pick Dates” 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 8/296:00 am
ONT
- TWF
1 stop5h 23m
Delta
Sat 9/51:17 pm
TWF
- ONT
1 stop4h 07m
Delta
Deal found 7/16![Delta logo]()
$276
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 21, 2026.
Search for one-way flight options from Ontario to Idaho. Find affordable one-way fares based on user searches. Data last updated July 21, 2026.
This Southwest deal was found by Cheapflights users on 7/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/258:35 am
ONT
- BOI
1 stop4h 05m
Southwest
Deal found 7/20![Southwest logo]()
$94
This Southwest deal was found by Cheapflights users on 7/19. Clicking the “Pick Dates” 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 9/34:50 pm
ONT
- BOI
1 stop6h 05m
Southwest
Deal found 7/19![Southwest logo]()
$104
This Priceline deal was found by Cheapflights users on 7/19. Clicking the “Pick Dates” 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 10/216:02 am
ONT
- BOI
1 stop7h 09m
Alaska Airlines
Deal found 7/19![Alaska Airlines logo]()
$109
This Priceline deal was found by Cheapflights users on 7/19. Clicking the “Pick Dates” 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 9/154:50 pm
ONT
- BOI
Nonstop1h 55m
Alaska Airlines
Deal found 7/19![Alaska Airlines logo]()
$119
This Frontier deal was found by Cheapflights users on 7/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/186:00 am
ONT
- BOI
1 stop5h 29m
Frontier
Deal found 7/17![Frontier logo]()
$120
This Frontier deal was found by Cheapflights users on 7/18. Clicking the “Pick Dates” 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 8/256:00 am
ONT
- BOI
1 stop5h 29m
Frontier
Deal found 7/18![Frontier logo]()
$124
This Super.com deal was found by Cheapflights users on 7/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/227:56 pm
ONT
- BOI
1 stop14h 33m
Frontier
Deal found 7/20![Frontier logo]()
$128
This Alaska Airlines deal was found by Cheapflights users on 7/16. Clicking the “Pick Dates” 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 11/135:12 pm
ONT
- BOI
Nonstop2h 00m
Alaska Airlines
Deal found 7/16![Alaska Airlines logo]()
$129
This Booking.com deal was found by Cheapflights users on 7/19. Clicking the “Pick Dates” 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 8/264:50 pm
ONT
- BOI
Nonstop1h 55m
Alaska Airlines
Deal found 7/19![Alaska Airlines logo]()
$131
This Booking.com deal was found by Cheapflights users on 7/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/55:12 pm
ONT
- BOI
Nonstop2h 00m
Alaska Airlines
Deal found 7/20![Alaska Airlines logo]()
$134
This CheapOair deal was found by Cheapflights users on 7/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/1710:49 am
ONT
- BOI
1 stop24h 40m
Frontier
Deal found 7/20![Frontier logo]()
$135
This Delta deal was found by Cheapflights users on 7/16. Clicking the “Pick Dates” 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 10/76:00 am
ONT
- TWF
1 stop5h 18m
Delta
Deal found 7/16![Delta logo]()
$138
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 21, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $177 (Alaska Airlines) |
One-way from | $94 (Southwest) |
Popular in | July |
Cheapest in | April |
Average price | $387 |
Good round-trip deal | $197 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 21, 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
Sat 9/5
5:05 pm-10:46 pm
1 stop4h 41m
Boise Air Term. Gowen Fld
Wed 9/9
6:44 pm-10:04 pm
1 stop4h 20m
$187
OntarioBoise
ONT - BOI
ONTBOI
Ontario
Sat 8/22
5:40 am-12:15 pm
1 stop5h 35m
Boise Air Term. Gowen Fld
Tue 8/25
6:00 am-8:55 am
1 stop3h 55m
$187
OntarioBoise
ONT - BOI
ONTBOI
Ontario
Tue 9/15
9:05 am-4:10 pm
1 stop6h 05m
Boise Air Term. Gowen Fld
Sat 9/19
12:55 pm-8:05 pm
2 stops8h 10m
$192
Quickest round-trip
OntarioBoise
ONT - BOI
ONTBOI
Ontario
Sat 8/29
4:50 pm-7:45 pm
Nonstop1h 55m
Boise Air Term. Gowen Fld
Tue 9/1
4:28 pm-8:24 pm
1 stop4h 56m
$197
OntarioBoise
ONT - BOI
ONTBOI
Ontario
Fri 9/4
4:50 pm-11:55 pm
1 stop6h 05m
Boise Air Term. Gowen Fld
Sat 9/5
11:35 am-2:15 pm
1 stop3h 40m
$197
OntarioBoise
ONT - BOI
ONTBOI
Ontario
Sat 8/22
1:06 pm-7:00 pm
1 stop4h 54m
Boise Air Term. Gowen Fld
Sun 8/23
6:00 am-8:52 am
1 stop3h 52m
$198
OntarioBoise
ONT - BOI
ONTBOI
Ontario
Sun 11/1
6:00 am-11:14 am
1 stop4h 14m
Boise Air Term. Gowen Fld
Wed 11/4
8:22 am-12:01 pm
1 stop4h 39m
$207
OntarioBoise
ONT - BOI
ONTBOI
Ontario
Thu 11/5
5:35 am-11:50 am
1 stop5h 15m
Boise Air Term. Gowen Fld
Mon 11/9
5:35 pm-10:55 pm
1 stop6h 20m
$207
OntarioBoise
ONT - BOI
ONTBOI
Ontario
Fri 10/23
6:55 pm-1:40 am
1 stop5h 45m
Boise Air Term. Gowen Fld
Mon 10/26
6:50 am-11:15 am
1 stop5h 25m
$207
OntarioBoise
ONT - BOI
ONTBOI
Ontario
Fri 10/16
5:20 am-1:20 pm
2 stops7h 00m
Boise Air Term. Gowen Fld
Mon 10/19
6:50 pm-11:55 pm
2 stops6h 05m
$217
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-TWF
ONT-GEG
ONT-WYS
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-TWF
ONT-GEG
ONT-WYS
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 $177). Flying from Ontario to Idaho in November is currently the most expensive (average of $413). 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 21, 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 21, 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 42 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 21, 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.
Comfort
8.0
Food
7.0
Overall
8.0
Boarding
8.1
Entertainment
7.5
Crew
8.6
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Comfort
8.0
Food
7.0
Overall
8.0
Boarding
8.1
Entertainment
7.5
Crew
8.6
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Comfort
8.0
Food
7.0
Overall
8.0
Boarding
8.1
Entertainment
7.5
Crew
8.6
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Comfort
8.0
Food
7.0
Overall
8.0
Boarding
8.1
Entertainment
7.5
Crew
8.6
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
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 21, 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 3 airlines flying from Ontario to Idaho
Discover the top 3 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 21, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$137 | Average$285 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$169 | Average$334 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$176 | Average$356 | FlexibilityNo cancel fee | On-time63% |