$99+ Cheap flights from Ontario (ONT) to Idaho
This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/3. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — BOI
Aug 13 — Aug 201
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 July 14, 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 14, 2026.
This Alaska Airlines deal was found by Cheapflights users on 7/12. 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 9/194:50 pm
ONT
- BOI
Nonstop1h 55m
Alaska Airlines
Tue 9/223:02 pm
BOI
- ONT
Nonstop2h 08m
Alaska Airlines
Deal found 7/12![Alaska Airlines logo]()
$177
This Priceline deal was found by Cheapflights users on 7/12. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/224:50 pm
ONT
- BOI
Nonstop1h 55m
Alaska Airlines
Mon 8/243:02 pm
BOI
- ONT
Nonstop2h 08m
Alaska Airlines
Deal found 7/12![Alaska Airlines logo]()
$187
This CheapOair deal was found by Cheapflights users on 7/12. 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.
Sat 8/224:50 pm
ONT
- BOI
Nonstop1h 55m
Alaska Airlines
Sun 8/303:02 pm
BOI
- ONT
Nonstop2h 08m
Alaska Airlines
Deal found 7/12![Alaska Airlines logo]()
$192
This Southwest deal was found by Cheapflights users on 7/10. 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 8/136:30 pm
ONT
- BOI
1 stop3h 20m
Southwest
Mon 8/179:05 am
BOI
- ONT
1 stop3h 45m
Southwest
Deal found 7/10![Southwest logo]()
$195
This CheapOair deal was found by Cheapflights users on 7/10. 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.
Fri 9/254:50 pm
ONT
- BOI
Nonstop1h 55m
Alaska Airlines
Sun 9/273:02 pm
BOI
- ONT
Nonstop2h 08m
Alaska Airlines
Deal found 7/10![Alaska Airlines logo]()
$197
This Southwest deal was found by Cheapflights users on 7/10. 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 8/53:35 pm
ONT
- BOI
1 stop6h 45m
Southwest
Mon 8/179:05 am
BOI
- ONT
1 stop3h 45m
Southwest
Deal found 7/10![Southwest logo]()
$199
This Delta deal was found by Cheapflights users on 7/9. Clicking the “Pick Dates” 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 8/65:05 pm
ONT
- BOI
1 stop5h 54m
Delta
Wed 8/196:45 pm
BOI
- ONT
1 stop5h 49m
Delta
Deal found 7/9![Delta logo]()
$200
This Southwest deal was found by Cheapflights users on 7/13. 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.
Wed 9/163:00 pm
ONT
- BOI
1 stop6h 15m
Southwest
Sat 9/197:45 am
BOI
- ONT
2 stops7h 30m
Southwest
Deal found 7/13![Southwest logo]()
$202
This Southwest deal was found by Cheapflights users on 7/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/59:05 am
ONT
- BOI
1 stop6h 05m
Southwest
Tue 8/1111:40 am
BOI
- ONT
1 stop5h 20m
Southwest
Deal found 7/9![Southwest logo]()
$203
This Southwest deal was found by Cheapflights users on 7/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/59:05 am
ONT
- BOI
1 stop6h 05m
Southwest
Wed 8/197:05 am
BOI
- ONT
1 stop4h 20m
Southwest
Deal found 7/9![Southwest logo]()
$204
This Southwest deal was found by Cheapflights users on 7/10. 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.
Mon 10/196:55 pm
ONT
- BOI
1 stop5h 45m
Southwest
Wed 10/211:25 pm
BOI
- ONT
2 stops8h 55m
Southwest
Deal found 7/10![Southwest logo]()
$205
This Delta deal was found by Cheapflights users on 7/12. 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.
Sat 8/221:06 pm
ONT
- BOI
1 stop4h 54m
Delta
Sun 8/236:00 am
BOI
- ONT
1 stop3h 52m
Delta
Deal found 7/12![Delta logo]()
$207
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 14, 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 14, 2026.
This Alaska Airlines deal was found by Cheapflights users on 7/11. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/194:50 pm
ONT
- BOI
Nonstop1h 55m
Alaska Airlines
Tue 9/223:02 pm
BOI
- ONT
Nonstop2h 08m
Alaska Airlines
Deal found 7/11![Alaska Airlines logo]()
$177
This Delta deal was found by Cheapflights users on 7/9. Clicking the “Pick Dates” 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 8/65:05 pm
ONT
- BOI
1 stop5h 54m
Delta
Wed 8/196:45 pm
BOI
- ONT
1 stop5h 49m
Delta
Deal found 7/9![Delta logo]()
$200
This Southwest deal was found by Cheapflights users on 7/12. 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.
Sun 9/2712:15 pm
ONT
- BOI
1 stop5h 55m
Southwest
Fri 10/212:45 pm
BOI
- ONT
1 stop6h 35m
Southwest
Deal found 7/12![Southwest logo]()
$217
This United Airlines deal was found by Cheapflights users on 7/12. 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.
Tue 9/298:03 am
ONT
- BOI
1 stop3h 55m
United Airlines
Sat 10/36:50 pm
BOI
- ONT
1 stop5h 09m
United Airlines
Deal found 7/12![United Airlines logo]()
$257
This Delta deal was found by Cheapflights users on 7/13. 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.
Fri 9/255:15 pm
ONT
- BOI
1 stop5h 43m
Delta
Sun 9/276:00 am
BOI
- ONT
1 stop4h 02m
Delta
Deal found 7/13![Delta logo]()
$217
This Southwest deal was found by Cheapflights users on 7/13. 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.
Sat 8/225:40 am
ONT
- BOI
2 stops7h 05m
Southwest
Mon 8/242:55 pm
BOI
- ONT
2 stops6h 45m
Southwest
Deal found 7/13![Southwest logo]()
$217
This Southwest deal was found by Cheapflights users on 7/13. 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.
Fri 9/115:40 am
ONT
- BOI
2 stops6h 35m
Southwest
Sun 9/137:30 am
BOI
- ONT
1 stop4h 10m
Southwest
Deal found 7/13![Southwest logo]()
$222
This United Airlines deal was found by Cheapflights users on 7/10. 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.
Tue 10/208:03 am
ONT
- BOI
1 stop3h 55m
United Airlines
Sat 10/246:50 pm
BOI
- ONT
1 stop5h 09m
United Airlines
Deal found 7/10![United Airlines logo]()
$257
This Delta deal was found by Cheapflights users on 7/9. Clicking the “Pick Dates” 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 8/1811:56 am
ONT
- GEG
1 stop7h 18m
Delta
Mon 8/245:30 am
GEG
- ONT
1 stop6h 46m
Delta
Deal found 7/9![Delta logo]()
$268
This Southwest deal was found by Cheapflights users on 7/10. 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 9/911:10 am
ONT
- GEG
1 stop3h 55m
Southwest
Tue 9/156:15 am
GEG
- ONT
1 stop6h 25m
Southwest
Deal found 7/10![Southwest logo]()
$256
This Southwest deal was found by Cheapflights users on 7/9. Clicking the “Pick Dates” 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 9/105:45 pm
ONT
- GEG
1 stop5h 30m
Southwest
Wed 9/166:15 am
GEG
- ONT
1 stop6h 25m
Southwest
Deal found 7/9![Southwest logo]()
$262
This Delta deal was found by Cheapflights users on 7/8. Clicking the “Pick Dates” 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 8/146:01 pm
ONT
- GEG
1 stop5h 58m
Delta
Mon 8/177:15 pm
GEG
- ONT
1 stop4h 19m
Delta
Deal found 7/8![Delta logo]()
$313
This Southwest deal was found by Cheapflights users on 7/10. 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.
Mon 8/104:10 pm
ONT
- GEG
2 stops7h 05m
Southwest
Mon 8/175:30 am
GEG
- ONT
1 stop4h 50m
Southwest
Deal found 7/10![Southwest logo]()
$268
This United Airlines deal was found by Cheapflights users on 7/11. 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.
Tue 10/205:00 am
ONT
- WYS
1 stop7h 30m
United Airlines
Sat 10/242:05 pm
WYS
- ONT
1 stop7h 53m
United Airlines
Deal found 7/11![United Airlines logo]()
$374
This Alaska Airlines deal was found by Cheapflights users on 7/11. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/147:15 am
ONT
- IDA
1 stop5h 01m
Alaska Airlines
Wed 11/181:53 pm
IDA
- ONT
1 stop5h 35m
Alaska Airlines
Deal found 7/11![Alaska Airlines logo]()
$415
This Southwest deal was found by Cheapflights users on 7/10. 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.
Fri 8/75:40 am
ONT
- BOI
1 stop3h 35m
Southwest
Sun 8/96:30 am
BOI
- ONT
1 stop4h 00m
Southwest
Deal found 7/10![Southwest logo]()
$275
This Booking.com deal was found by Cheapflights users on 7/13. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/125:32 pm
ONT
- IDA
1 stop18h 34m
Alaska Airlines
Wed 8/196:18 am
IDA
- ONT
1 stop5h 46m
Alaska Airlines
Deal found 7/13![Alaska Airlines logo]()
$419
This Delta deal was found by Cheapflights users on 7/9. Clicking the “Pick Dates” 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 9/146:00 am
ONT
- JAC
1 stop3h 49m
Delta
Mon 9/145:55 pm
JAC
- ONT
1 stop6h 52m
Delta
Deal found 7/9![Delta logo]()
$367
This Southwest deal was found by Cheapflights users on 7/9. Clicking the “Pick Dates” 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 8/74:10 pm
ONT
- BOI
2 stops6h 25m
Southwest
Mon 8/101:55 pm
BOI
- ONT
2 stops6h 30m
Southwest
Deal found 7/9![Southwest logo]()
$283
This United Airlines deal was found by Cheapflights users on 7/9. Clicking the “Pick Dates” 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 8/255:00 am
ONT
- SUN
1 stop7h 48m
United Airlines
Fri 8/288:00 am
SUN
- ONT
1 stop5h 12m
United Airlines
Deal found 7/9![United Airlines logo]()
$417
This Alaska Airlines deal was found by Cheapflights users on 7/13. 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.
Sat 11/1412:00 pm
ONT
- SUN
1 stop21h 51m
Alaska Airlines
Wed 11/1811:33 am
SUN
- ONT
1 stop7h 55m
Alaska Airlines
Deal found 7/13![Alaska Airlines logo]()
$439
This Delta deal was found by Cheapflights users on 7/9. Clicking the “Pick Dates” 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 8/121:06 pm
ONT
- PIH
1 stop4h 17m
Delta
Sun 8/167:00 pm
PIH
- ONT
1 stop5h 34m
Delta
Deal found 7/9![Delta logo]()
$375
This Southwest deal was found by Cheapflights users on 7/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/53:35 pm
ONT
- BOI
2 stops5h 50m
Southwest
Wed 8/193:30 pm
BOI
- ONT
2 stops6h 25m
Southwest
Deal found 7/9![Southwest logo]()
$284
This Alaska Airlines deal was found by Cheapflights users on 7/9. Clicking the “Pick Dates” 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 8/66:02 am
ONT
- SUN
1 stop11h 59m
Alaska Airlines
Mon 8/107:43 pm
SUN
- ONT
1 stop16h 31m
Alaska Airlines
Deal found 7/9![Alaska Airlines logo]()
$443
This Delta deal was found by Cheapflights users on 7/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/86:00 am
ONT
- TWF
1 stop3h 47m
Delta
Fri 8/1411:37 am
TWF
- ONT
1 stop5h 47m
Delta
Deal found 7/9![Delta logo]()
$394
This United Airlines deal was found by Cheapflights users on 7/8. Clicking the “Pick Dates” 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
Fri 10/92:05 pm
WYS
- ONT
1 stop7h 53m
United Airlines
Deal found 7/8![United Airlines logo]()
$483
This Alaska Airlines deal was found by Cheapflights users on 7/9. Clicking the “Pick Dates” 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 8/87:00 am
ONT
- IDA
1 stop5h 06m
Alaska Airlines
Fri 8/141:43 pm
IDA
- ONT
1 stop7h 47m
Alaska Airlines
Deal found 7/9![Alaska Airlines logo]()
$459
This Southwest deal was found by Cheapflights users on 7/8. Clicking the “Pick Dates” 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
- GEG
1 stop3h 40m
Southwest
Mon 8/245:30 am
GEG
- ONT
1 stop7h 10m
Southwest
Deal found 7/8![Southwest logo]()
$314
This Delta deal was found by Cheapflights users on 7/12. 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 9/21:06 pm
ONT
- JAC
1 stop4h 49m
Delta
Sun 9/66:01 pm
JAC
- ONT
1 stop5h 22m
Delta
Deal found 7/12![Delta logo]()
$404
This United Airlines deal was found by Cheapflights users on 7/13. 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.
Thu 7/231:18 pm
ONT
- JAC
1 stop6h 40m
United Airlines
Fri 7/318:00 am
JAC
- ONT
1 stop5h 12m
United Airlines
Deal found 7/13![United Airlines logo]()
$496
Last-minute flights from Ontario to IdahoDiscover last-minute flight deals from Ontario to Idaho. Data last updated July 14, 2026 and is based on user searches.
Discover last-minute flight deals from Ontario to Idaho. Data last updated July 14, 2026 and is based on user searches.
This Southwest deal was found by Cheapflights users on 7/10. 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 8/53:35 pm
ONT
- BOI
1 stop6h 45m
Southwest
Mon 8/179:05 am
BOI
- ONT
1 stop3h 45m
Southwest
Deal found 7/10![Southwest logo]()
$199
This Southwest deal was found by Cheapflights users on 7/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/59:05 am
ONT
- BOI
1 stop6h 05m
Southwest
Tue 8/1111:40 am
BOI
- ONT
1 stop5h 20m
Southwest
Deal found 7/9![Southwest logo]()
$203
This Southwest deal was found by Cheapflights users on 7/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/59:05 am
ONT
- BOI
1 stop6h 05m
Southwest
Wed 8/197:05 am
BOI
- ONT
1 stop4h 20m
Southwest
Deal found 7/9![Southwest logo]()
$204
This Delta deal was found by Cheapflights users on 7/9. Clicking the “Pick Dates” 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 8/65:05 pm
ONT
- BOI
1 stop5h 54m
Delta
Wed 8/196:45 pm
BOI
- ONT
1 stop5h 49m
Delta
Deal found 7/9![Delta logo]()
$200
This Southwest deal was found by Cheapflights users on 7/10. 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 8/64:10 pm
ONT
- BOI
2 stops6h 25m
Southwest
Mon 8/104:55 pm
BOI
- ONT
1 stop6h 10m
Southwest
Deal found 7/10![Southwest logo]()
$209
This Southwest deal was found by Cheapflights users on 7/9. Clicking the “Pick Dates” 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 8/64:10 pm
ONT
- BOI
2 stops6h 25m
Southwest
Wed 8/193:40 pm
BOI
- ONT
1 stop6h 15m
Southwest
Deal found 7/9![Southwest logo]()
$210
This Southwest deal was found by Cheapflights users on 7/10. 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 8/136:30 pm
ONT
- BOI
1 stop3h 20m
Southwest
Mon 8/179:05 am
BOI
- ONT
1 stop3h 45m
Southwest
Deal found 7/10![Southwest logo]()
$195
This Priceline deal was found by Cheapflights users on 7/12. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/224:50 pm
ONT
- BOI
Nonstop1h 55m
Alaska Airlines
Mon 8/243:02 pm
BOI
- ONT
Nonstop2h 08m
Alaska Airlines
Deal found 7/12![Alaska Airlines logo]()
$187
This CheapOair deal was found by Cheapflights users on 7/12. 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.
Sat 8/224:50 pm
ONT
- BOI
Nonstop1h 55m
Alaska Airlines
Sun 8/303:02 pm
BOI
- ONT
Nonstop2h 08m
Alaska Airlines
Deal found 7/12![Alaska Airlines logo]()
$192
This Priceline deal was found by Cheapflights users on 7/11. 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.
Sat 8/224:50 pm
ONT
- BOI
Nonstop1h 55m
Alaska Airlines
Sat 8/293:02 pm
BOI
- ONT
Nonstop2h 08m
Alaska Airlines
Deal found 7/11![Alaska Airlines logo]()
$197
This Delta deal was found by Cheapflights users on 7/12. 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.
Sat 8/221:06 pm
ONT
- BOI
1 stop4h 54m
Delta
Sun 8/236:00 am
BOI
- ONT
1 stop3h 52m
Delta
Deal found 7/12![Delta logo]()
$207
This Kiwi.com deal was found by Cheapflights users on 7/10. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/263:40 pm
ONT
- GEG
1 stop17h 42m
Multiple Airlines
Sun 8/3010:12 am
GEG
- ONT
1 stop21h 51m
Multiple Airlines
Deal found 7/10![Multiple Airlines logo]()
$222
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 14, 2026.
Search for one-way flight options from Ontario to Idaho. Find affordable one-way fares based on user searches. Data last updated July 14, 2026.
This Southwest deal was found by Cheapflights users on 7/12. 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.
Sat 8/296:55 am
ONT
- BOI
1 stop7h 35m
Southwest
Deal found 7/12![Southwest logo]()
$99
This Delta deal was found by Cheapflights users on 7/9. Clicking the “Pick Dates” 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 8/45:05 pm
ONT
- BOI
1 stop5h 54m
Delta
Deal found 7/9![Delta logo]()
$102
This Priceline deal was found by Cheapflights users on 7/13. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/2410:47 am
ONT
- BOI
1 stop5h 08m
Alaska Airlines
Deal found 7/13![Alaska Airlines logo]()
$109
This American Airlines deal was found by Cheapflights users on 7/13. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/236:15 am
ONT
- BOI
1 stop6h 09m
American Airlines
Deal found 7/13![American Airlines logo]()
$110
This Southwest deal was found by Cheapflights users on 7/10. 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.
Sun 10/45:10 pm
ONT
- BOI
2 stops7h 10m
Southwest
Deal found 7/10![Southwest logo]()
$114
This SmartFares deal was found by Cheapflights users on 7/13. 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 SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/254:50 pm
ONT
- BOI
Nonstop1h 55m
Alaska Airlines
Deal found 7/13![Alaska Airlines logo]()
$116
This Priceline deal was found by Cheapflights users on 7/9. Clicking the “Pick Dates” 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 9/304:50 pm
ONT
- BOI
Nonstop1h 55m
Alaska Airlines
Deal found 7/9![Alaska Airlines logo]()
$119
This Super.com deal was found by Cheapflights users on 7/13. 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.
Sun 8/26:00 am
ONT
- BOI
1 stop5h 29m
Frontier
Deal found 7/13![Frontier logo]()
$122
This Frontier deal was found by Cheapflights users on 7/9. Clicking the “Pick Dates” 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 8/166:00 am
ONT
- BOI
1 stop5h 29m
Frontier
Deal found 7/9![Frontier logo]()
$124
This Super.com deal was found by Cheapflights users on 7/12. 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.
Sat 8/227:56 pm
ONT
- BOI
1 stop14h 33m
Frontier
Deal found 7/12![Frontier logo]()
$126
This Super.com deal was found by Cheapflights users on 7/10. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/310:49 am
ONT
- BOI
1 stop24h 40m
Frontier
Deal found 7/10![Frontier logo]()
$128
This Alaska Airlines deal was found by Cheapflights users on 7/9. Clicking the “Pick Dates” 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 8/1112:04 pm
ONT
- GEG
1 stop6h 56m
Alaska Airlines
Deal found 7/9![Alaska Airlines logo]()
$131
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 14, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $177 (Alaska Airlines) |
One-way from | $99 (Southwest) |
Popular in | July |
Cheapest in | April |
Average price | $386 |
Good round-trip deal | $287 or less |
Good one-way deal | $173 or less |
Cheapflights Fare Finder
Customize your flight search to find flights from Ontario to Idaho that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated July 14, 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
Sat 9/19
4:50 pm-7:45 pm
Nonstop1h 55m
Boise Air Term. Gowen Fld
Tue 9/22
3:02 pm-4:10 pm
Nonstop2h 08m
$177
OntarioBoise
ONT - BOI
ONTBOI
Ontario
Thu 8/6
5:05 pm-11:59 pm
1 stop5h 54m
Boise Air Term. Gowen Fld
Wed 8/19
6:45 pm-11:34 pm
1 stop5h 49m
$200
OntarioBoise
ONT - BOI
ONTBOI
Ontario
Sun 9/27
12:15 pm-7:10 pm
1 stop5h 55m
Boise Air Term. Gowen Fld
Fri 10/2
12:45 pm-6:20 pm
1 stop6h 35m
$217
OntarioBoise
ONT - BOI
ONTBOI
Ontario
Fri 9/25
5:15 pm-11:58 pm
1 stop5h 43m
Boise Air Term. Gowen Fld
Sun 9/27
6:00 am-9:02 am
1 stop4h 02m
$217
OntarioBoise
ONT - BOI
ONTBOI
Ontario
Sat 8/22
5:40 am-1:45 pm
2 stops7h 05m
Boise Air Term. Gowen Fld
Mon 8/24
2:55 pm-8:40 pm
2 stops6h 45m
$217
OntarioBoise
ONT - BOI
ONTBOI
Ontario
Fri 9/11
5:40 am-1:15 pm
2 stops6h 35m
Boise Air Term. Gowen Fld
Sun 9/13
7:30 am-10:40 am
1 stop4h 10m
$222
OntarioSpokane
ONT - GEG
ONTGEG
Ontario
Wed 9/9
11:10 am-3:05 pm
1 stop3h 55m
Spokane
Tue 9/15
6:15 am-12:40 pm
1 stop6h 25m
$256
OntarioBoise
ONT - BOI
ONTBOI
Ontario
Tue 9/29
8:03 am-12:58 pm
1 stop3h 55m
Boise Air Term. Gowen Fld
Sat 10/3
6:50 pm-10:59 pm
1 stop5h 09m
$257
OntarioBoise
ONT - BOI
ONTBOI
Ontario
Tue 10/20
8:03 am-12:58 pm
1 stop3h 55m
Boise Air Term. Gowen Fld
Sat 10/24
6:50 pm-10:59 pm
1 stop5h 09m
$257
OntarioSpokane
ONT - GEG
ONTGEG
Ontario
Thu 9/10
5:45 pm-11:15 pm
1 stop5h 30m
Spokane
Wed 9/16
6:15 am-12:40 pm
1 stop6h 25m
$262
Showing 1-10 of 60 resultsSorted by cheapest first
Best time to book a flight from Ontario to Idaho
Have a flexible travel schedule? Discover the best time to fly to Idaho from Ontario with our price prediction graph.
ONT-BOI
ONT-GEG
ONT-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-BOI
ONT-GEG
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 July is currently the most expensive (average of $199). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
What is the cheapest time of day to fly from ONT to ID?
Find hourly flight availability from Ontario to Idaho. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated July 14, 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 14, 2026.
The most flights from ONT to USID are scheduled on a Tuesday (2 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (1 on average).
How much does it cost to fly round-trip from Ontario to Idaho?
How far ahead should I book a flight from Ontario to Idaho?
To ensure you get the cheapest price possible for a flight from Ontario to Idaho, you should look to book at least 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 14, 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.
Crew
8.6
Comfort
8.0
Overall
8.0
Food
7.0
Boarding
8.1
Entertainment
7.5
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Crew
8.6
Comfort
8.0
Overall
8.0
Food
7.0
Boarding
8.1
Entertainment
7.5
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Crew
8.6
Comfort
8.0
Overall
8.0
Food
7.0
Boarding
8.1
Entertainment
7.5
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Crew
8.6
Comfort
8.0
Overall
8.0
Food
7.0
Boarding
8.1
Entertainment
7.5
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Crew
8.6
Comfort
8.0
Overall
8.0
Food
7.0
Boarding
8.1
Entertainment
7.5
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.
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 July 14, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Ontario to Idaho flights
Consider these flights traveling from Ontario to Idaho.
Top 4 airlines flying from Ontario to Idaho
Discover the top 4 airlines that operate flights from Ontario to Idaho. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated July 14, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$137 | Average$286 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$168 | Average$354 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$169 | Average$320 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$196 | Average$319 | FlexibilityNo cancel fee | On-time69% |