$109+ 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 8/20. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — BOI
Jul 7 — Jul 141
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 7, 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 7, 2026.
This Priceline deal was found by Cheapflights users on 6/6. Clicking the “Pick Dates” 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 9/54:50 pm
ONT
- BOI
Nonstop1h 55m
Alaska Airlines
Tue 9/83:02 pm
BOI
- ONT
Nonstop2h 08m
Alaska Airlines
Deal found 6/6![Alaska Airlines logo]()
$177
This Alaska Airlines deal was found by Cheapflights users on 6/2. Clicking the “Pick Dates” 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 10/174:42 pm
ONT
- BOI
Nonstop2h 00m
Alaska Airlines
Mon 10/192:51 pm
BOI
- ONT
Nonstop2h 11m
Alaska Airlines
Deal found 6/2![Alaska Airlines logo]()
$187
This Alaska Airlines deal was found by Cheapflights users on 6/3. Clicking the “Pick Dates” 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 9/124:50 pm
ONT
- BOI
Nonstop1h 55m
Alaska Airlines
Sat 9/193:02 pm
BOI
- ONT
Nonstop2h 08m
Alaska Airlines
Deal found 6/3![Alaska Airlines logo]()
$197
This Delta deal was found by Cheapflights users on 6/4. Clicking the “Pick Dates” 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 8/266:00 am
ONT
- BOI
1 stop5h 14m
Delta
Sat 8/291:06 pm
BOI
- ONT
1 stop4h 18m
Delta
Deal found 6/4![Delta logo]()
$207
This Alaska Airlines deal was found by Cheapflights users on 6/2. Clicking the “Pick Dates” 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 8/204:50 pm
ONT
- BOI
Nonstop1h 55m
Alaska Airlines
Mon 8/243:02 pm
BOI
- ONT
Nonstop2h 08m
Alaska Airlines
Deal found 6/2![Alaska Airlines logo]()
$217
This Delta deal was found by Cheapflights users on 6/4. Clicking the “Pick Dates” 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 9/115:05 pm
ONT
- BOI
1 stop4h 51m
Delta
Mon 9/146:40 pm
BOI
- ONT
1 stop5h 57m
Delta
Deal found 6/4![Delta logo]()
$227
This United Airlines deal was found by Cheapflights users on 6/2. Clicking the “Pick Dates” 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 10/159:39 am
ONT
- BOI
1 stop4h 52m
United Airlines
Mon 10/197:05 pm
BOI
- ONT
1 stop4h 54m
United Airlines
Deal found 6/2![United Airlines logo]()
$243
This Priceline deal was found by Cheapflights users on 6/7. Clicking the “Pick Dates” 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 8/2612:00 pm
ONT
- BOI
1 stop7h 33m
Alaska Airlines
Fri 9/43:02 pm
BOI
- ONT
Nonstop2h 08m
Alaska Airlines
Deal found 6/7![Alaska Airlines logo]()
$247
This United Airlines deal was found by Cheapflights users on 6/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/251:50 pm
ONT
- BOI
1 stop6h 50m
United Airlines
Wed 8/57:05 pm
BOI
- ONT
1 stop4h 32m
United Airlines
Deal found 6/5![United Airlines logo]()
$257
This Expedia deal was found by Cheapflights users on 6/4. Clicking the “Pick Dates” 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 6/306:00 am
ONT
- BOI
1 stop5h 30m
Frontier
Tue 7/141:24 pm
BOI
- ONT
1 stop21h 40m
Frontier
Deal found 6/4![Frontier logo]()
$258
This Delta deal was found by Cheapflights users on 6/3. Clicking the “Pick Dates” 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 11/155:05 pm
ONT
- BOI
1 stop5h 59m
Delta
Thu 11/195:45 pm
BOI
- ONT
1 stop7h 03m
Delta
Deal found 6/3![Delta logo]()
$262
This CheapOair deal was found by Cheapflights users on 6/3. Clicking the “Pick Dates” 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.
Tue 6/2310:50 am
ONT
- GEG
1 stop24h 46m
Frontier
Fri 6/2612:31 pm
GEG
- ONT
1 stop21h 34m
Frontier
Deal found 6/3![Frontier logo]()
$286
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 7, 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 7, 2026.
This Southwest deal was found by Cheapflights users on 6/6. Clicking the “Pick Dates” 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 7/75:30 am
ONT
- BOI
2 stops7h 55m
Southwest
Tue 7/216:30 am
BOI
- ONT
1 stop4h 05m
Southwest
Deal found 6/6![Southwest logo]()
$312
This Alaska Airlines deal was found by Cheapflights users on 6/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 6/287:00 am
ONT
- IDA
1 stop5h 06m
Alaska Airlines
Fri 7/37:15 am
IDA
- ONT
1 stop6h 54m
Alaska Airlines
Deal found 6/7![Alaska Airlines logo]()
$319
This Delta deal was found by Cheapflights users on 6/4. Clicking the “Pick Dates” 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 8/156:00 am
ONT
- WYS
1 stop3h 46m
Delta
Wed 8/191:09 pm
WYS
- ONT
1 stop4h 15m
Delta
Deal found 6/4![Delta logo]()
$319
This United Airlines deal was found by Cheapflights users on 6/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/41:50 pm
ONT
- BOI
1 stop5h 15m
United Airlines
Mon 7/207:05 pm
BOI
- ONT
1 stop4h 32m
United Airlines
Deal found 6/3![United Airlines logo]()
$322
This Delta deal was found by Cheapflights users on 6/4. Clicking the “Pick Dates” 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 12/11:00 pm
ONT
- JAC
1 stop5h 05m
Delta
Tue 12/81:10 pm
JAC
- ONT
1 stop4h 02m
Delta
Deal found 6/4![Delta logo]()
$329
This United Airlines deal was found by Cheapflights users on 6/7. Clicking the “Pick Dates” 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 9/65:00 am
ONT
- IDA
1 stop7h 29m
United Airlines
Thu 9/104:04 pm
IDA
- ONT
1 stop5h 49m
United Airlines
Deal found 6/7![United Airlines logo]()
$336
This Southwest deal was found by Cheapflights users on 6/5. Clicking the “Pick Dates” 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 7/94:40 pm
ONT
- BOI
2 stops6h 40m
Southwest
Thu 7/1611:10 am
BOI
- ONT
1 stop5h 10m
Southwest
Deal found 6/5![Southwest logo]()
$342
This Alaska Airlines deal was found by Cheapflights users on 6/4. Clicking the “Pick Dates” 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 7/142:05 pm
ONT
- GEG
1 stop6h 51m
Alaska Airlines
Thu 7/166:13 am
GEG
- ONT
1 stop5h 01m
Alaska Airlines
Deal found 6/4![Alaska Airlines logo]()
$361
This Delta deal was found by Cheapflights users on 6/7. Clicking the “Pick Dates” 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 8/249:43 am
ONT
- JAC
1 stop6h 14m
Delta
Mon 8/316:01 pm
JAC
- ONT
1 stop5h 22m
Delta
Deal found 6/7![Delta logo]()
$329
This Alaska Airlines deal was found by Cheapflights users on 6/2. Clicking the “Pick Dates” 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 8/182:05 pm
ONT
- GEG
1 stop6h 51m
Alaska Airlines
Wed 8/193:44 pm
GEG
- ONT
1 stop7h 40m
Alaska Airlines
Deal found 6/2![Alaska Airlines logo]()
$361
This Delta deal was found by Cheapflights users on 6/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/89:40 am
ONT
- JAC
1 stop6h 20m
Delta
Wed 7/156:05 pm
JAC
- ONT
1 stop6h 43m
Delta
Deal found 6/6![Delta logo]()
$329
This United Airlines deal was found by Cheapflights users on 6/6. Clicking the “Pick Dates” 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 9/81:56 pm
ONT
- SUN
1 stop6h 41m
United Airlines
Wed 9/98:00 am
SUN
- ONT
1 stop5h 12m
United Airlines
Deal found 6/6![United Airlines logo]()
$369
This Southwest deal was found by Cheapflights users on 6/5. Clicking the “Pick Dates” 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
- GEG
2 stops6h 55m
Southwest
Fri 7/105:10 pm
GEG
- ONT
1 stop6h 25m
Southwest
Deal found 6/5![Southwest logo]()
$386
This Delta deal was found by Cheapflights users on 6/7. Clicking the “Pick Dates” 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 7/71:00 pm
ONT
- JAC
1 stop5h 37m
Delta
Tue 7/146:05 pm
JAC
- ONT
1 stop6h 43m
Delta
Deal found 6/7![Delta logo]()
$329
This Alaska Airlines deal was found by Cheapflights users on 6/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/185:32 pm
ONT
- IDA
1 stop18h 34m
Alaska Airlines
Thu 7/237:15 am
IDA
- ONT
1 stop6h 54m
Alaska Airlines
Deal found 6/4![Alaska Airlines logo]()
$369
This Southwest deal was found by Cheapflights users on 6/4. Clicking the “Pick Dates” 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 9/63:25 pm
ONT
- GEG
2 stops7h 10m
Southwest
Wed 9/95:45 am
GEG
- ONT
2 stops6h 55m
Southwest
Deal found 6/4![Southwest logo]()
$397
This Delta deal was found by Cheapflights users on 6/4. Clicking the “Pick Dates” 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 11/306:00 am
ONT
- JAC
1 stop5h 12m
Delta
Thu 12/31:10 pm
JAC
- ONT
1 stop4h 02m
Delta
Deal found 6/4![Delta logo]()
$329
This United Airlines deal was found by Cheapflights users on 6/3. Clicking the “Pick Dates” 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 10/245:00 am
ONT
- IDA
1 stop7h 29m
United Airlines
Wed 10/282:35 pm
IDA
- ONT
1 stop6h 45m
United Airlines
Deal found 6/3![United Airlines logo]()
$399
This Alaska Airlines deal was found by Cheapflights users on 6/5. Clicking the “Pick Dates” 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 10/246:00 am
ONT
- IDA
1 stop8h 35m
Alaska Airlines
Wed 10/286:09 am
IDA
- ONT
1 stop8h 10m
Alaska Airlines
Deal found 6/5![Alaska Airlines logo]()
$369
This Southwest deal was found by Cheapflights users on 6/6. Clicking the “Pick Dates” 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 11/204:25 pm
ONT
- GEG
1 stop7h 20m
Southwest
Mon 11/235:50 pm
GEG
- ONT
2 stops5h 45m
Southwest
Deal found 6/6![Southwest logo]()
$406
This United Airlines deal was found by Cheapflights users on 6/7. Clicking the “Pick Dates” 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 7/221:50 pm
ONT
- JAC
1 stop6h 40m
United Airlines
Sat 7/258:00 am
JAC
- ONT
1 stop5h 12m
United Airlines
Deal found 6/7![United Airlines logo]()
$409
This Alaska Airlines deal was found by Cheapflights users on 6/7. Clicking the “Pick Dates” 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 6/294:18 pm
ONT
- GEG
1 stop5h 15m
Alaska Airlines
Tue 7/76:13 am
GEG
- ONT
1 stop5h 01m
Alaska Airlines
Deal found 6/7![Alaska Airlines logo]()
$381
This Delta deal was found by Cheapflights users on 6/5. Clicking the “Pick Dates” 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
Tue 8/46:01 pm
JAC
- ONT
1 stop6h 33m
Delta
Deal found 6/5![Delta logo]()
$349
This Southwest deal was found by Cheapflights users on 6/2. Clicking the “Pick Dates” 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 7/26:35 pm
ONT
- BOI
2 stops5h 35m
Southwest
Tue 7/72:05 pm
BOI
- ONT
1 stop6h 35m
Southwest
Deal found 6/2![Southwest logo]()
$406
This United Airlines deal was found by Cheapflights users on 6/4. Clicking the “Pick Dates” 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 12/26:00 am
ONT
- JAC
1 stop6h 57m
United Airlines
Fri 12/112:40 pm
JAC
- ONT
1 stop6h 40m
United Airlines
Deal found 6/4![United Airlines logo]()
$409
This Alaska Airlines deal was found by Cheapflights users on 6/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/304:18 pm
ONT
- BOI
Nonstop1h 55m
Alaska Airlines
Tue 7/76:23 am
BOI
- ONT
1 stop5h 51m
Alaska Airlines
Deal found 6/2![Alaska Airlines logo]()
$382
This Delta deal was found by Cheapflights users on 6/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/109:40 am
ONT
- JAC
1 stop6h 20m
Delta
Mon 7/136:05 pm
JAC
- ONT
1 stop6h 43m
Delta
Deal found 6/5![Delta logo]()
$349
This Southwest deal was found by Cheapflights users on 6/4. Clicking the “Pick Dates” 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
- GEG
2 stops6h 55m
Southwest
Sun 7/55:00 am
GEG
- ONT
1 stop4h 05m
Southwest
Deal found 6/4![Southwest logo]()
$407
This Delta deal was found by Cheapflights users on 6/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/295:59 pm
ONT
- GEG
1 stop5h 56m
Delta
Wed 7/85:25 am
GEG
- ONT
1 stop5h 52m
Delta
Deal found 6/7![Delta logo]()
$361
This United Airlines deal was found by Cheapflights users on 6/6. Clicking the “Pick Dates” 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 6/266:39 pm
ONT
- BOI
1 stop4h 16m
United Airlines
Sat 6/277:05 pm
BOI
- ONT
1 stop4h 45m
United Airlines
Deal found 6/6![United Airlines logo]()
$442
Last-minute flights from Ontario to IdahoDiscover last-minute flight deals from Ontario to Idaho. Data last updated June 7, 2026 and is based on user searches.
Discover last-minute flight deals from Ontario to Idaho. Data last updated June 7, 2026 and is based on user searches.
This Frontier deal was found by Cheapflights users on 6/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/156:00 am
ONT
- GEG
1 stop5h 36m
Frontier
Fri 6/2612:31 pm
GEG
- ONT
1 stop11h 18m
Frontier
Deal found 6/4![Frontier logo]()
$306
This CheapOair deal was found by Cheapflights users on 6/3. Clicking the “Pick Dates” 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.
Tue 6/2310:50 am
ONT
- GEG
1 stop24h 46m
Frontier
Fri 6/2612:31 pm
GEG
- ONT
1 stop21h 34m
Frontier
Deal found 6/3![Frontier logo]()
$286
This Frontier deal was found by Cheapflights users on 6/3. Clicking the “Pick Dates” 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 6/256:00 am
ONT
- BOI
1 stop5h 30m
Frontier
Tue 7/141:24 pm
BOI
- ONT
1 stop11h 26m
Frontier
Deal found 6/3![Frontier logo]()
$263
This Frontier deal was found by Cheapflights users on 6/3. Clicking the “Pick Dates” 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 6/256:00 am
ONT
- BOI
1 stop5h 30m
Frontier
Thu 7/91:24 pm
BOI
- ONT
1 stop11h 26m
Frontier
Deal found 6/3![Frontier logo]()
$268
This Expedia deal was found by Cheapflights users on 6/4. Clicking the “Pick Dates” 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 6/306:00 am
ONT
- BOI
1 stop5h 30m
Frontier
Tue 7/141:24 pm
BOI
- ONT
1 stop21h 40m
Frontier
Deal found 6/4![Frontier logo]()
$258
This Priceline deal was found by Cheapflights users on 6/4. Clicking the “Pick Dates” 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 6/306:00 am
ONT
- BOI
1 stop5h 30m
Multiple Airlines
Tue 7/142:31 pm
BOI
- ONT
Nonstop2h 07m
Multiple Airlines
Deal found 6/4![Multiple Airlines logo]()
$303
This Frontier deal was found by Cheapflights users on 6/2. Clicking the “Pick Dates” 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 7/26:00 am
ONT
- BOI
1 stop5h 30m
Frontier
Thu 7/91:24 pm
BOI
- ONT
1 stop11h 26m
Frontier
Deal found 6/2![Frontier logo]()
$294
This Booking.com deal was found by Cheapflights users on 6/2. Clicking the “Pick Dates” 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 7/26:00 am
ONT
- BOI
1 stop5h 30m
Frontier
Tue 7/71:24 pm
BOI
- ONT
1 stop21h 40m
Frontier
Deal found 6/2![Frontier logo]()
$301
This Delta deal was found by Cheapflights users on 6/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/35:21 pm
ONT
- BOI
1 stop5h 48m
Delta
Tue 7/76:00 am
BOI
- ONT
1 stop3h 47m
Delta
Deal found 6/2![Delta logo]()
$307
This Alaska Airlines deal was found by Cheapflights users on 6/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/114:18 pm
ONT
- BOI
Nonstop1h 55m
Alaska Airlines
Tue 7/142:31 pm
BOI
- ONT
Nonstop2h 07m
Alaska Airlines
Deal found 6/4![Alaska Airlines logo]()
$287
This Frontier deal was found by Cheapflights users on 6/5. Clicking the “Pick Dates” 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
Tue 8/41:24 pm
BOI
- ONT
1 stop11h 26m
Frontier
Deal found 6/5![Frontier logo]()
$289
This United Airlines deal was found by Cheapflights users on 6/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/251:50 pm
ONT
- BOI
1 stop6h 50m
United Airlines
Tue 8/47:05 pm
BOI
- ONT
1 stop4h 32m
United Airlines
Deal found 6/5![United Airlines logo]()
$257
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 7, 2026.
Search for one-way flight options from Ontario to Idaho. Find affordable one-way fares based on user searches. Data last updated June 7, 2026.
This Delta deal was found by Cheapflights users on 6/2. Clicking the “Pick Dates” 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 8/2012:55 pm
ONT
- BOI
1 stop3h 52m
Delta
Deal found 6/2![Delta logo]()
$109
This Kiwi.com deal was found by Cheapflights users on 6/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/303:40 pm
ONT
- IDA
1 stop23h 20m
Multiple Airlines
Deal found 6/7![Multiple Airlines logo]()
$111
This Alaska Airlines deal was found by Cheapflights users on 6/2. Clicking the “Pick Dates” 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 9/54:50 pm
ONT
- BOI
Nonstop1h 55m
Alaska Airlines
Deal found 6/2![Alaska Airlines logo]()
$119
This Super.com deal was found by Cheapflights users on 6/5. Clicking the “Pick Dates” 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 8/136:00 am
ONT
- BOI
1 stop5h 29m
Frontier
Deal found 6/5![Frontier logo]()
$127
This Mytrip deal was found by Cheapflights users on 6/6. Clicking the “Pick Dates” 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.
Thu 8/204:50 pm
ONT
- BOI
Nonstop1h 55m
Alaska Airlines
Deal found 6/6![Alaska Airlines logo]()
$129
This Super.com deal was found by Cheapflights users on 6/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/166:00 am
ONT
- BOI
1 stop5h 29m
Frontier
Deal found 6/4![Frontier logo]()
$131
This SmartFares deal was found by Cheapflights users on 6/5. Clicking the “Pick Dates” 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.
Sun 8/234:50 pm
ONT
- BOI
Nonstop1h 55m
Alaska Airlines
Deal found 6/5![Alaska Airlines logo]()
$133
This Frontier deal was found by Cheapflights users on 6/6. Clicking the “Pick Dates” 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
Deal found 6/6![Frontier logo]()
$134
This United Airlines deal was found by Cheapflights users on 6/3. Clicking the “Pick Dates” 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 9/29:01 am
ONT
- BOI
1 stop5h 30m
United Airlines
Deal found 6/3![United Airlines logo]()
$139
This CheapOair deal was found by Cheapflights users on 6/6. Clicking the “Pick Dates” 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 8/510:49 am
ONT
- BOI
1 stop24h 40m
Frontier
Deal found 6/6![Frontier logo]()
$140
This CheapOair deal was found by Cheapflights users on 6/5. Clicking the “Pick Dates” 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 7/1310:49 am
ONT
- BOI
1 stop24h 40m
Frontier
Deal found 6/5![Frontier logo]()
$145
This United Airlines deal was found by Cheapflights users on 6/2. Clicking the “Pick Dates” 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 8/306:00 am
ONT
- BOI
1 stop4h 04m
United Airlines
Deal found 6/2![United Airlines logo]()
$149
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 7, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $177 (Priceline) |
One-way from | $109 (Delta) |
Popular in | February |
Cheapest in | April |
Average price | $307 |
Good round-trip deal | $378 or less |
Good one-way deal | $203 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 7, 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
Tue 7/7
5:30 am-2:25 pm
2 stops7h 55m
Boise Air Term. Gowen Fld
Tue 7/21
6:30 am-9:35 am
1 stop4h 05m
$312
OntarioIdaho Falls
ONT - IDA
ONTIDA
Ontario
Sun 6/28
7:00 am-1:06 pm
1 stop5h 06m
Idaho Falls Fanning Field
Fri 7/3
7:15 am-1:09 pm
1 stop6h 54m
$319
OntarioWest Yellowstone
ONT - WYS
ONTWYS
Ontario
Sat 8/15
6:00 am-10:46 am
1 stop3h 46m
West Yellowstone
Wed 8/19
1:09 pm-4:24 pm
1 stop4h 15m
$319
OntarioBoise
ONT - BOI
ONTBOI
Ontario
Sat 7/4
1:50 pm-8:05 pm
1 stop5h 15m
Boise Air Term. Gowen Fld
Mon 7/20
7:05 pm-10:37 pm
1 stop4h 32m
$322
OntarioJackson
ONT - JAC
ONTJAC
Ontario
Tue 12/1
1:00 pm-7:05 pm
1 stop5h 05m
Jackson Hole
Tue 12/8
1:10 pm-4:12 pm
1 stop4h 02m
$329
OntarioJackson
ONT - JAC
ONTJAC
Ontario
Mon 8/24
9:43 am-4:57 pm
1 stop6h 14m
Jackson Hole
Mon 8/31
6:01 pm-10:23 pm
1 stop5h 22m
$329
OntarioJackson
ONT - JAC
ONTJAC
Ontario
Wed 7/8
9:40 am-5:00 pm
1 stop6h 20m
Jackson Hole
Wed 7/15
6:05 pm-11:48 pm
1 stop6h 43m
$329
OntarioJackson
ONT - JAC
ONTJAC
Ontario
Tue 7/7
1:00 pm-7:37 pm
1 stop5h 37m
Jackson Hole
Tue 7/14
6:05 pm-11:48 pm
1 stop6h 43m
$329
OntarioJackson
ONT - JAC
ONTJAC
Ontario
Mon 11/30
6:00 am-12:12 pm
1 stop5h 12m
Jackson Hole
Thu 12/3
1:10 pm-4:12 pm
1 stop4h 02m
$329
OntarioIdaho Falls
ONT - IDA
ONTIDA
Ontario
Sun 9/6
5:00 am-1:29 pm
1 stop7h 29m
Idaho Falls Fanning Field
Thu 9/10
4:04 pm-8:53 pm
1 stop5h 49m
$336
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-IDA
ONT-BOI
ONT-JAC
ONT-SUN
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-IDA
ONT-BOI
ONT-JAC
ONT-SUN
What is the cheapest month to book a flight from Ontario to Idaho?
Currently, May is the cheapest month in which you can book a flight from Ontario to Idaho (average of $79). Flying from Ontario to Idaho in November is currently the most expensive (average of $196). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
What is the cheapest time of day to fly from ONT to ID?
Find hourly flight availability from Ontario to Idaho. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated June 7, 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.
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 73 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 7, 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.
Entertainment
7.0
Food
7.1
Boarding
8.1
Crew
8.5
Overall
7.9
Comfort
7.8
Reviews
1 / 20
10.0
ExcellentFranzi,Mar 2026
SFO - PDX
Entertainment
7.0
Food
7.1
Boarding
8.1
Crew
8.5
Overall
7.9
Comfort
7.8
Reviews
1 / 20
10.0
ExcellentFranzi,Mar 2026
SFO - PDX
Entertainment
7.0
Food
7.1
Boarding
8.1
Crew
8.5
Overall
7.9
Comfort
7.8
Reviews
1 / 20
10.0
ExcellentFranzi,Mar 2026
SFO - PDX
Entertainment
7.0
Food
7.1
Boarding
8.1
Crew
8.5
Overall
7.9
Comfort
7.8
Reviews
1 / 20
10.0
ExcellentFranzi,Mar 2026
SFO - PDX
Entertainment
7.0
Food
7.1
Boarding
8.1
Crew
8.5
Overall
7.9
Comfort
7.8
Reviews
1 / 20
10.0
ExcellentFranzi,Mar 2026
SFO - PDX
Related info for your journey
Find useful and relevant information for your journey from Ontario to Idaho. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
Browse thousands of different options on Cheapflights for your next trip
Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.
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 7, 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 7, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$117 | Average$261 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$158 | Average$321 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$168 | Average$359 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$196 | Average$319 | FlexibilityNo cancel fee | On-time69% |