$119+ 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 8/29. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — BOI
Jul 21 — Jul 281
Round-trip
1 adult, Economy
We work with more than 300 partners to bring you better travel deals
Find cheap flights from Ontario to Idaho with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from Ontario to Idaho
Cheapest
Best
Last-minute
One-way
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 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 June 21, 2026.
This CheapOair deal was found by Cheapflights users on 6/16. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/54:50 pm
ONT
- BOI
Nonstop1h 55m
Alaska Airlines
Sat 9/123:02 pm
BOI
- ONT
Nonstop2h 08m
Alaska Airlines
Deal found 6/16![Alaska Airlines logo]()
$177
This CheapOair deal was found by Cheapflights users on 6/17. 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 CheapOair 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
Wed 8/263:02 pm
BOI
- ONT
Nonstop2h 08m
Alaska Airlines
Deal found 6/17![Alaska Airlines logo]()
$187
This CheapOair deal was found by Cheapflights users on 6/16. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/304:50 pm
ONT
- BOI
Nonstop1h 55m
Alaska Airlines
Wed 10/72:51 pm
BOI
- ONT
Nonstop2h 11m
Alaska Airlines
Deal found 6/16![Alaska Airlines logo]()
$188
This CheapOair deal was found by Cheapflights users on 6/17. 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 CheapOair 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
Wed 9/23:02 pm
BOI
- ONT
Nonstop2h 08m
Alaska Airlines
Deal found 6/17![Alaska Airlines logo]()
$189
This Booking.com deal was found by Cheapflights users on 6/18. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/54:50 pm
ONT
- BOI
Nonstop1h 55m
Alaska Airlines
Tue 9/83:02 pm
BOI
- ONT
Nonstop2h 08m
Alaska Airlines
Deal found 6/18![Alaska Airlines logo]()
$195
This CheapOair deal was found by Cheapflights users on 6/17. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/264:50 pm
ONT
- BOI
Nonstop1h 55m
Alaska Airlines
Tue 9/293:02 pm
BOI
- ONT
Nonstop2h 08m
Alaska Airlines
Deal found 6/17![Alaska Airlines logo]()
$197
This Booking.com deal was found by Cheapflights users on 6/16. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/284:50 pm
ONT
- BOI
Nonstop1h 55m
Alaska Airlines
Sun 8/303:02 pm
BOI
- ONT
Nonstop2h 08m
Alaska Airlines
Deal found 6/16![Alaska Airlines logo]()
$200
This Delta deal was found by Cheapflights users on 6/18. 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.
Fri 8/215:05 pm
ONT
- BOI
1 stop5h 54m
Delta
Tue 8/256:00 am
BOI
- ONT
1 stop3h 52m
Delta
Deal found 6/18![Delta logo]()
$202
This CheapOair deal was found by Cheapflights users on 6/19. 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 CheapOair 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 6/19![Alaska Airlines logo]()
$207
This Booking.com deal was found by Cheapflights users on 6/18. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/164:42 pm
ONT
- BOI
Nonstop2h 00m
Alaska Airlines
Sun 10/182:51 pm
BOI
- ONT
Nonstop2h 11m
Alaska Airlines
Deal found 6/18![Alaska Airlines logo]()
$209
This Delta deal was found by Cheapflights users on 6/16. 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.
Fri 8/285:05 pm
ONT
- BOI
1 stop3h 55m
Delta
Sun 8/306:00 am
BOI
- ONT
1 stop3h 52m
Delta
Deal found 6/16![Delta logo]()
$217
This CheapOair deal was found by Cheapflights users on 6/19. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/84:42 pm
ONT
- BOI
Nonstop2h 00m
Alaska Airlines
Sun 10/112:51 pm
BOI
- ONT
Nonstop2h 11m
Alaska Airlines
Deal found 6/19![Alaska Airlines logo]()
$221
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 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 June 21, 2026.
This Alaska Airlines deal was found by Cheapflights users on 6/19. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/104:18 pm
ONT
- BOI
Nonstop1h 55m
Alaska Airlines
Mon 7/132:31 pm
BOI
- ONT
Nonstop2h 07m
Alaska Airlines
Deal found 6/19![Alaska Airlines logo]()
$287
This Delta deal was found by Cheapflights users on 6/18. 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.
Tue 7/216:00 am
ONT
- WYS
1 stop5h 26m
Delta
Tue 7/281:10 pm
WYS
- ONT
2 stops10h 42m
Delta
Deal found 6/18![Delta logo]()
$304
This Southwest deal was found by Cheapflights users on 6/16. 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 7/148:05 am
ONT
- BOI
1 stop3h 25m
Southwest
Tue 7/212:05 pm
BOI
- ONT
2 stops7h 15m
Southwest
Deal found 6/16![Southwest logo]()
$308
This United Airlines deal was found by Cheapflights users on 6/15. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/199:01 am
ONT
- BOI
1 stop5h 30m
United Airlines
Sat 8/296:15 am
BOI
- ONT
1 stop6h 57m
United Airlines
Deal found 6/15![United Airlines logo]()
$312
This Delta deal was found by Cheapflights users on 6/18. 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.
Fri 8/145:05 pm
ONT
- BOI
1 stop5h 54m
Delta
Mon 8/176:00 am
BOI
- ONT
1 stop3h 52m
Delta
Deal found 6/18![Delta logo]()
$307
This Alaska Airlines deal was found by Cheapflights users on 6/18. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/44:50 pm
ONT
- BOI
Nonstop1h 55m
Alaska Airlines
Mon 9/73:02 pm
BOI
- ONT
Nonstop2h 08m
Alaska Airlines
Deal found 6/18![Alaska Airlines logo]()
$312
This Southwest deal was found by Cheapflights users on 6/18. 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.
Tue 8/112:10 pm
ONT
- BOI
2 stops7h 05m
Southwest
Wed 8/123:40 pm
BOI
- ONT
2 stops6h 15m
Southwest
Deal found 6/18![Southwest logo]()
$317
This Delta deal was found by Cheapflights users on 6/17. 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.
Wed 8/196:00 am
ONT
- IDA
1 stop3h 50m
Delta
Fri 8/287:00 pm
IDA
- ONT
1 stop5h 34m
Delta
Deal found 6/17![Delta logo]()
$319
This Alaska Airlines deal was found by Cheapflights users on 6/19. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/256:02 am
ONT
- GEG
1 stop6h 29m
Alaska Airlines
Wed 8/265:52 am
GEG
- ONT
1 stop5h 12m
Alaska Airlines
Deal found 6/19![Alaska Airlines logo]()
$333
This Southwest deal was found by Cheapflights users on 6/16. 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 8/134:10 pm
ONT
- BOI
2 stops6h 25m
Southwest
Mon 8/171:55 pm
BOI
- ONT
2 stops6h 30m
Southwest
Deal found 6/16![Southwest logo]()
$335
This Delta deal was found by Cheapflights users on 6/18. 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.
Mon 8/241:06 pm
ONT
- JAC
1 stop4h 49m
Delta
Mon 8/316:01 pm
JAC
- ONT
1 stop5h 22m
Delta
Deal found 6/18![Delta logo]()
$329
This Southwest deal was found by Cheapflights users on 6/18. 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.
Mon 8/104:10 pm
ONT
- BOI
2 stops6h 25m
Southwest
Thu 8/131:55 pm
BOI
- ONT
2 stops6h 30m
Southwest
Deal found 6/18![Southwest logo]()
$335
This United Airlines deal was found by Cheapflights users on 6/15. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/295:00 am
ONT
- WYS
1 stop7h 20m
United Airlines
Wed 9/21:55 pm
WYS
- ONT
1 stop7h 58m
United Airlines
Deal found 6/15![United Airlines logo]()
$433
This Alaska Airlines deal was found by Cheapflights users on 6/15. 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.
Thu 8/132:05 pm
ONT
- GEG
1 stop6h 51m
Alaska Airlines
Mon 8/176:13 am
GEG
- ONT
1 stop6h 56m
Alaska Airlines
Deal found 6/15![Alaska Airlines logo]()
$361
This Southwest deal was found by Cheapflights users on 6/19. 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.
Tue 8/117:45 am
ONT
- GEG
2 stops8h 30m
Southwest
Wed 8/196:15 am
GEG
- ONT
2 stops7h 20m
Southwest
Deal found 6/19![Southwest logo]()
$343
This Delta deal was found by Cheapflights users on 6/19. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/266:00 am
ONT
- JAC
1 stop3h 46m
Delta
Wed 7/296:05 pm
JAC
- ONT
1 stop6h 43m
Delta
Deal found 6/19![Delta logo]()
$347
This United Airlines deal was found by Cheapflights users on 6/19. 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.
Fri 8/145:00 am
ONT
- WYS
1 stop7h 20m
United Airlines
Fri 8/214:44 pm
WYS
- ONT
1 stop21h 06m
United Airlines
Deal found 6/19![United Airlines logo]()
$451
This Alaska Airlines deal was found by Cheapflights users on 6/17. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/276:02 am
ONT
- IDA
1 stop8h 33m
Alaska Airlines
Wed 10/286:09 am
IDA
- ONT
1 stop8h 12m
Alaska Airlines
Deal found 6/17![Alaska Airlines logo]()
$381
This Delta deal was found by Cheapflights users on 6/17. 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 8/16:00 am
ONT
- IDA
1 stop3h 43m
Delta
Sat 8/87:00 pm
IDA
- ONT
1 stop4h 23m
Delta
Deal found 6/17![Delta logo]()
$349
This United Airlines deal was found by Cheapflights users on 6/19. 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.
Sat 8/155:00 am
ONT
- WYS
1 stop7h 20m
United Airlines
Fri 8/214:44 pm
WYS
- ONT
1 stop21h 06m
United Airlines
Deal found 6/19![United Airlines logo]()
$451
This Southwest deal was found by Cheapflights users on 6/19. 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 8/278:30 am
ONT
- GEG
2 stops7h 05m
Southwest
Mon 8/315:30 am
GEG
- ONT
1 stop7h 10m
Southwest
Deal found 6/19![Southwest logo]()
$378
This Delta deal was found by Cheapflights users on 6/20. 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 8/261:06 pm
ONT
- JAC
1 stop4h 49m
Delta
Mon 8/316:01 pm
JAC
- ONT
1 stop5h 22m
Delta
Deal found 6/20![Delta logo]()
$349
This Alaska Airlines deal was found by Cheapflights users on 6/20. 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.
Tue 9/13:07 pm
ONT
- SUN
1 stop17h 32m
Alaska Airlines
Tue 9/1510:28 am
SUN
- ONT
1 stop9h 35m
Alaska Airlines
Deal found 6/20![Alaska Airlines logo]()
$417
This United Airlines deal was found by Cheapflights users on 6/16. 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.
Sun 7/121:50 pm
ONT
- JAC
1 stop6h 40m
United Airlines
Tue 7/148:00 am
JAC
- ONT
1 stop5h 12m
United Airlines
Deal found 6/16![United Airlines logo]()
$464
This Delta deal was found by Cheapflights users on 6/20. 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.
Sat 7/46:00 am
ONT
- JAC
1 stop5h 16m
Delta
Fri 7/106:05 pm
JAC
- ONT
1 stop6h 43m
Delta
Deal found 6/20![Delta logo]()
$349
This Southwest deal was found by Cheapflights users on 6/20. 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.
Thu 8/135:40 am
ONT
- BOI
2 stops6h 35m
Southwest
Sun 8/165:40 pm
BOI
- ONT
2 stops6h 10m
Southwest
Deal found 6/20![Southwest logo]()
$396
This Delta deal was found by Cheapflights users on 6/20. 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.
Sat 7/46:00 am
ONT
- JAC
1 stop3h 47m
Delta
Thu 7/96:05 pm
JAC
- ONT
1 stop6h 43m
Delta
Deal found 6/20![Delta logo]()
$349
This Southwest deal was found by Cheapflights users on 6/16. 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.
Fri 7/34:40 pm
ONT
- BOI
2 stops6h 35m
Southwest
Wed 7/82:05 pm
BOI
- ONT
2 stops7h 15m
Southwest
Deal found 6/16![Southwest logo]()
$402
This United Airlines deal was found by Cheapflights users on 6/16. 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.
Tue 11/101:00 pm
ONT
- JAC
1 stop7h 02m
United Airlines
Thu 11/124:25 pm
JAC
- ONT
1 stop4h 55m
United Airlines
Deal found 6/16![United Airlines logo]()
$500
This Booking.com deal was found by Cheapflights users on 6/20. 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.
Mon 9/77:12 am
ONT
- GEG
1 stop4h 40m
Alaska Airlines
Sun 9/137:03 am
GEG
- ONT
2 stops9h 07m
Alaska Airlines
Deal found 6/20![Alaska Airlines logo]()
$455
Last-minute flights from Ontario to IdahoDiscover last-minute flight deals from Ontario to Idaho. Data last updated June 21, 2026 and is based on user searches.
Discover last-minute flight deals from Ontario to Idaho. Data last updated June 21, 2026 and is based on user searches.
This Frontier deal was found by Cheapflights users on 6/18. 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.
Sun 7/56:00 am
ONT
- BOI
1 stop5h 29m
Frontier
Thu 7/91:24 pm
BOI
- ONT
1 stop11h 26m
Frontier
Deal found 6/18![Frontier logo]()
$263
This CheapOair deal was found by Cheapflights users on 6/17. 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 CheapOair 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
Sun 7/121:24 pm
BOI
- ONT
1 stop21h 40m
Frontier
Deal found 6/17![Frontier logo]()
$273
This Frontier deal was found by Cheapflights users on 6/17. 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.
Sun 7/56:00 am
ONT
- BOI
1 stop5h 29m
Frontier
Tue 7/71:24 pm
BOI
- ONT
1 stop11h 26m
Frontier
Deal found 6/17![Frontier logo]()
$278
This Frontier deal was found by Cheapflights users on 6/17. 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.
Thu 7/96:00 am
ONT
- BOI
1 stop5h 29m
Frontier
Sun 7/121:24 pm
BOI
- ONT
1 stop21h 40m
Frontier
Deal found 6/17![Frontier logo]()
$249
This Alaska Airlines deal was found by Cheapflights users on 6/19. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/104:18 pm
ONT
- BOI
Nonstop1h 55m
Alaska Airlines
Mon 7/132:31 pm
BOI
- ONT
Nonstop2h 07m
Alaska Airlines
Deal found 6/19![Alaska Airlines logo]()
$287
This CheapOair deal was found by Cheapflights users on 6/17. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/1110:49 am
ONT
- BOI
1 stop24h 40m
Frontier
Tue 7/141:24 pm
BOI
- ONT
1 stop11h 26m
Frontier
Deal found 6/17![Frontier logo]()
$277
This Expedia deal was found by Cheapflights users on 6/17. 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 Expedia 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 stop21h 40m
Frontier
Deal found 6/17![Frontier logo]()
$248
This Mytrip deal was found by Cheapflights users on 6/17. 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 Mytrip 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
Thu 8/61:24 pm
BOI
- ONT
1 stop21h 40m
Frontier
Deal found 6/17![Frontier logo]()
$257
This Delta deal was found by Cheapflights users on 6/18. 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.
Tue 7/216:00 am
ONT
- WYS
1 stop5h 26m
Delta
Tue 7/281:10 pm
WYS
- ONT
2 stops10h 42m
Delta
Deal found 6/18![Delta logo]()
$304
This Expedia deal was found by Cheapflights users on 6/17. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/286:00 am
ONT
- BOI
1 stop5h 29m
Frontier
Thu 7/301:24 pm
BOI
- ONT
1 stop21h 40m
Frontier
Deal found 6/17![Frontier logo]()
$267
This CheapOair deal was found by Cheapflights users on 6/20. 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.
Wed 7/2910:49 am
ONT
- BOI
1 stop24h 40m
Frontier
Sun 8/91:24 pm
BOI
- ONT
1 stop21h 40m
Frontier
Deal found 6/20![Frontier logo]()
$258
This CheapOair deal was found by Cheapflights users on 6/19. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/304:18 pm
ONT
- BOI
Nonstop1h 55m
Alaska Airlines
Sun 8/22:31 pm
BOI
- ONT
Nonstop2h 07m
Alaska Airlines
Deal found 6/19![Alaska Airlines logo]()
$294
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 21, 2026.
Search for one-way flight options from Ontario to Idaho. Find affordable one-way fares based on user searches. Data last updated June 21, 2026.
This Priceline deal was found by Cheapflights users on 6/19. 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.
Sat 8/294:50 pm
ONT
- BOI
Nonstop1h 55m
Alaska Airlines
Deal found 6/19![Alaska Airlines logo]()
$119
This Super.com deal was found by Cheapflights users on 6/18. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/96:00 am
ONT
- BOI
1 stop5h 29m
Frontier
Deal found 6/18![Frontier logo]()
$122
This Frontier deal was found by Cheapflights users on 6/20. 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 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 6/20![Frontier logo]()
$124
This Priceline deal was found by Cheapflights users on 6/19. 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.
Fri 9/114:50 pm
ONT
- BOI
Nonstop1h 55m
Alaska Airlines
Deal found 6/19![Alaska Airlines logo]()
$129
This Booking.com deal was found by Cheapflights users on 6/15. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/234:50 pm
ONT
- BOI
Nonstop1h 55m
Alaska Airlines
Deal found 6/15![Alaska Airlines logo]()
$133
This Mytrip deal was found by Cheapflights users on 6/17. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/510:49 am
ONT
- BOI
1 stop24h 40m
Frontier
Deal found 6/17![Frontier logo]()
$134
This Booking.com deal was found by Cheapflights users on 6/17. 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 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
Deal found 6/17![Frontier logo]()
$135
This Super.com deal was found by Cheapflights users on 6/17. 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 Super.com 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
Deal found 6/17![Frontier logo]()
$137
This United Airlines deal was found by Cheapflights users on 6/15. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/151:56 pm
ONT
- BOI
1 stop6h 35m
United Airlines
Deal found 6/15![United Airlines logo]()
$139
This Super.com deal was found by Cheapflights users on 6/20. 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.
Wed 7/810:49 am
ONT
- BOI
1 stop24h 40m
Frontier
Deal found 6/20![Frontier logo]()
$141
This Kiwi.com deal was found by Cheapflights users on 6/19. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/1311:47 am
ONT
- GEG
1 stop8h 37m
Multiple Airlines
Deal found 6/19![Multiple Airlines logo]()
$145
This Frontier deal was found by Cheapflights users on 6/19. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/36:00 am
ONT
- GEG
1 stop5h 36m
Frontier
Deal found 6/19![Frontier logo]()
$155
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 21, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $177 (Priceline) |
One-way from | $119 (Priceline) |
Popular in | February |
Cheapest in | April |
Average price | $324 |
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 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
Quickest round-trip
OntarioBoise
ONT - BOI
ONTBOI
Ontario
Fri 7/10
4:18 pm-7:13 pm
Nonstop1h 55m
Boise Air Term. Gowen Fld
Mon 7/13
2:31 pm-3:38 pm
Nonstop2h 07m
$287
OntarioWest Yellowstone
ONT - WYS
ONTWYS
Ontario
Tue 7/21
6:00 am-12:26 pm
1 stop5h 26m
West Yellowstone
Tue 7/28
1:10 pm-10:52 pm
2 stops10h 42m
$304
OntarioBoise
ONT - BOI
ONTBOI
Ontario
Fri 8/14
5:05 pm-11:59 pm
1 stop5h 54m
Boise Air Term. Gowen Fld
Mon 8/17
6:00 am-8:52 am
1 stop3h 52m
$307
OntarioBoise
ONT - BOI
ONTBOI
Ontario
Tue 7/14
8:05 am-12:30 pm
1 stop3h 25m
Boise Air Term. Gowen Fld
Tue 7/21
2:05 pm-8:20 pm
2 stops7h 15m
$308
OntarioBoise
ONT - BOI
ONTBOI
Ontario
Wed 8/19
9:01 am-3:31 pm
1 stop5h 30m
Boise Air Term. Gowen Fld
Sat 8/29
6:15 am-12:12 pm
1 stop6h 57m
$312
OntarioBoise
ONT - BOI
ONTBOI
Ontario
Fri 9/4
4:50 pm-7:45 pm
Nonstop1h 55m
Boise Air Term. Gowen Fld
Mon 9/7
3:02 pm-4:10 pm
Nonstop2h 08m
$312
OntarioBoise
ONT - BOI
ONTBOI
Ontario
Tue 8/11
2:10 pm-10:15 pm
2 stops7h 05m
Boise Air Term. Gowen Fld
Wed 8/12
3:40 pm-8:55 pm
2 stops6h 15m
$317
OntarioIdaho Falls
ONT - IDA
ONTIDA
Ontario
Wed 8/19
6:00 am-10:50 am
1 stop3h 50m
Idaho Falls Fanning Field
Fri 8/28
7:00 pm-11:34 pm
1 stop5h 34m
$319
OntarioJackson
ONT - JAC
ONTJAC
Ontario
Mon 8/24
1:06 pm-6:55 pm
1 stop4h 49m
Jackson Hole
Mon 8/31
6:01 pm-10:23 pm
1 stop5h 22m
$329
OntarioSpokane
ONT - GEG
ONTGEG
Ontario
Tue 8/25
6:02 am-12:31 pm
1 stop6h 29m
Spokane
Wed 8/26
5:52 am-11:04 am
1 stop5h 12m
$333
Showing 1-10 of 60 resultsSorted by cheapest first
Best time to book a flight from Ontario to Idaho
Have a flexible travel schedule? Discover the best time to fly to Idaho from Ontario with our price prediction graph.
ONT-BOI
ONT-WYS
ONT-JAC
ONT-IDA
ONT-GEG
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-WYS
ONT-JAC
ONT-IDA
What is the cheapest month to book a flight from Ontario to Idaho?
Currently, May is the cheapest month in which you can book a flight from Ontario to Idaho (average of $79). Flying from Ontario to Idaho in July is currently the most expensive (average of $199). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
What is the cheapest time of day to fly from ONT to ID?
Find hourly flight availability from Ontario to Idaho. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated June 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 June 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 77 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 21, 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.
Crew
8.5
Overall
7.9
Comfort
7.8
Boarding
8.1
Entertainment
7.0
Food
7.1
Reviews
1 / 20
10.0
ExcellentFranzi,Mar 2026
SFO - PDX
Crew
8.5
Overall
7.9
Comfort
7.8
Boarding
8.1
Entertainment
7.0
Food
7.1
Reviews
1 / 20
10.0
ExcellentFranzi,Mar 2026
SFO - PDX
Crew
8.5
Overall
7.9
Comfort
7.8
Boarding
8.1
Entertainment
7.0
Food
7.1
Reviews
1 / 20
10.0
ExcellentFranzi,Mar 2026
SFO - PDX
Crew
8.5
Overall
7.9
Comfort
7.8
Boarding
8.1
Entertainment
7.0
Food
7.1
Reviews
1 / 20
10.0
ExcellentFranzi,Mar 2026
SFO - PDX
Crew
8.5
Overall
7.9
Comfort
7.8
Boarding
8.1
Entertainment
7.0
Food
7.1
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.
Alternative routes
Complete your trip
Flights by cabin class
Other flight options
Popular flights
Top destinations
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 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 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 21, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$117 | Average$281 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$168 | Average$354 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$169 | Average$316 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$196 | Average$306 | FlexibilityNo cancel fee | On-time69% |