$76+ 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 5/6. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — BOI
Apr 11 — Apr 181
Round-trip
1 adult, Economy
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Find cheap flights from Ontario to Idaho with Cheapflights
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Cheapest flights from Ontario to IdahoExplore the most affordable flight options available from Ontario to Idaho. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 12, 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 March 12, 2026.
This Alaska Airlines deal was found by Cheapflights users on 3/9. 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 4/146:25 pm
ONT
- BOI
Nonstop2h 01m
Alaska Airlines
Sat 4/184:40 pm
BOI
- ONT
Nonstop2h 05m
Alaska Airlines
Deal found 3/9![Alaska Airlines logo]()
$137
This Alaska Airlines deal was found by Cheapflights users on 3/9. 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.
Wed 4/156:25 pm
ONT
- BOI
Nonstop2h 01m
Alaska Airlines
Sat 4/184:40 pm
BOI
- ONT
Nonstop2h 05m
Alaska Airlines
Deal found 3/9![Alaska Airlines logo]()
$147
This Delta deal was found by Cheapflights users on 3/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/65:55 pm
ONT
- BOI
1 stop5h 22m
Delta
Wed 5/138:45 am
BOI
- ONT
1 stop4h 34m
Delta
Deal found 3/11![Delta logo]()
$151
This Southwest deal was found by Cheapflights users on 3/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/63:45 pm
ONT
- BOI
2 stops7h 40m
Southwest
Wed 5/135:15 pm
BOI
- ONT
1 stop5h 55m
Southwest
Deal found 3/11![Southwest logo]()
$156
This Southwest deal was found by Cheapflights users on 3/10. 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 4/153:45 pm
ONT
- BOI
1 stop6h 35m
Southwest
Sat 4/188:50 am
BOI
- ONT
1 stop4h 25m
Southwest
Deal found 3/10![Southwest logo]()
$157
This Expedia deal was found by Cheapflights users on 3/8. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/1512:59 am
ONT
- GEG
1 stop9h 50m
Frontier
Thu 4/2311:44 am
GEG
- ONT
1 stop19h 47m
Frontier
Deal found 3/8![Frontier logo]()
$160
This Delta deal was found by Cheapflights users on 3/9. 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 5/911:52 am
ONT
- GEG
1 stop6h 51m
Delta
Wed 5/134:15 pm
GEG
- ONT
1 stop6h 19m
Delta
Deal found 3/9![Delta logo]()
$167
This Southwest deal was found by Cheapflights users on 3/10. 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.
Sat 4/116:45 am
ONT
- BOI
1 stop7h 05m
Southwest
Sat 4/183:25 pm
BOI
- ONT
2 stops6h 20m
Southwest
Deal found 3/10![Southwest logo]()
$168
This Alaska Airlines deal was found by Cheapflights users on 3/8. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/17:59 pm
ONT
- BOI
1 stop16h 53m
Alaska Airlines
Sat 5/164:14 pm
BOI
- ONT
Nonstop2h 03m
Alaska Airlines
Deal found 3/8![Alaska Airlines logo]()
$171
This Delta deal was found by Cheapflights users on 3/9. 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 5/911:52 am
ONT
- GEG
1 stop6h 51m
Delta
Tue 5/125:00 am
GEG
- ONT
2 stops7h 19m
Delta
Deal found 3/9![Delta logo]()
$172
This Southwest deal was found by Cheapflights users on 3/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/245:05 pm
ONT
- BOI
1 stop6h 40m
Southwest
Tue 4/282:00 pm
BOI
- ONT
1 stop6h 35m
Southwest
Deal found 3/11![Southwest logo]()
$174
This Alaska Airlines deal was found by Cheapflights users on 3/9. 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 4/146:25 pm
ONT
- BOI
Nonstop2h 01m
Alaska Airlines
Wed 4/221:15 pm
BOI
- ONT
Nonstop2h 04m
Alaska Airlines
Deal found 3/9![Alaska Airlines logo]()
$177
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 March 12, 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 March 12, 2026.
This Alaska Airlines deal was found by Cheapflights users on 3/11. 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.
Wed 4/156:25 pm
ONT
- BOI
Nonstop2h 01m
Alaska Airlines
Sat 4/184:40 pm
BOI
- ONT
Nonstop2h 05m
Alaska Airlines
Deal found 3/11![Alaska Airlines logo]()
$147
This Delta deal was found by Cheapflights users on 3/7. 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.
Fri 5/12:20 pm
ONT
- GEG
1 stop6h 42m
Delta
Mon 5/46:15 am
GEG
- ONT
1 stop4h 58m
Delta
Deal found 3/7![Delta logo]()
$167
This United Airlines deal was found by Cheapflights users on 3/7. 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 4/1511:05 am
ONT
- BOI
1 stop4h 43m
United Airlines
Sat 4/1812:30 pm
BOI
- ONT
1 stop6h 17m
United Airlines
Deal found 3/7![United Airlines logo]()
$257
This Southwest deal was found by Cheapflights users on 3/10. 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 4/135:30 pm
ONT
- BOI
1 stop4h 25m
Southwest
Fri 4/171:20 pm
BOI
- ONT
1 stop5h 50m
Southwest
Deal found 3/10![Southwest logo]()
$262
This Delta deal was found by Cheapflights users on 3/9. 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 4/147:00 am
ONT
- BOI
1 stop8h 14m
Delta
Sat 4/185:40 am
BOI
- ONT
1 stop6h 33m
Delta
Deal found 3/9![Delta logo]()
$167
This Alaska Airlines deal was found by Cheapflights users on 3/8. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/147:48 pm
ONT
- BOI
Nonstop1h 59m
Alaska Airlines
Mon 5/184:14 pm
BOI
- ONT
Nonstop2h 03m
Alaska Airlines
Deal found 3/8![Alaska Airlines logo]()
$177
This Alaska Airlines deal was found by Cheapflights users on 3/9. 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 4/166:25 pm
ONT
- BOI
Nonstop2h 01m
Alaska Airlines
Wed 4/221:15 pm
BOI
- ONT
Nonstop2h 04m
Alaska Airlines
Deal found 3/9![Alaska Airlines logo]()
$197
This Delta deal was found by Cheapflights users on 3/8. 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.
Thu 4/165:55 pm
ONT
- LWS
1 stop6h 13m
Delta
Sat 4/256:09 am
LWS
- ONT
2 stops10h 16m
Delta
Deal found 3/8![Delta logo]()
$220
This Southwest deal was found by Cheapflights users on 3/7. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/23:45 pm
ONT
- BOI
2 stops7h 40m
Southwest
Sat 6/64:10 pm
BOI
- ONT
1 stop5h 15m
Southwest
Deal found 3/7![Southwest logo]()
$262
This United Airlines deal was found by Cheapflights users on 3/7. 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.
Sat 4/186:00 am
ONT
- BOI
1 stop4h 06m
United Airlines
Sun 4/1912:30 pm
BOI
- ONT
1 stop6h 17m
United Airlines
Deal found 3/7![United Airlines logo]()
$262
This Delta deal was found by Cheapflights users on 3/9. 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 5/131:29 pm
ONT
- GEG
2 stops10h 30m
Delta
Sun 5/177:23 pm
GEG
- ONT
1 stop15h 49m
Delta
Deal found 3/9![Delta logo]()
$231
This Southwest deal was found by Cheapflights users on 3/7. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/24:30 pm
ONT
- BOI
2 stops5h 50m
Southwest
Tue 6/96:00 am
BOI
- ONT
1 stop4h 05m
Southwest
Deal found 3/7![Southwest logo]()
$262
This Alaska Airlines deal was found by Cheapflights users on 3/11. 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.
Tue 4/216:00 am
ONT
- GEG
1 stop17h 10m
Alaska Airlines
Sat 4/255:00 am
GEG
- ONT
1 stop17h 32m
Alaska Airlines
Deal found 3/11![Alaska Airlines logo]()
$245
This Delta deal was found by Cheapflights users on 3/9. 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 5/126:45 am
ONT
- GEG
1 stop5h 28m
Delta
Tue 5/127:23 pm
GEG
- ONT
1 stop15h 49m
Delta
Deal found 3/9![Delta logo]()
$247
This Alaska Airlines deal was found by Cheapflights users on 3/8. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/87:59 pm
ONT
- BOI
1 stop12h 43m
Alaska Airlines
Mon 5/111:15 pm
BOI
- ONT
Nonstop2h 04m
Alaska Airlines
Deal found 3/8![Alaska Airlines logo]()
$251
This United Airlines deal was found by Cheapflights users on 3/7. 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.
Tue 4/145:10 am
ONT
- SUN
1 stop7h 25m
United Airlines
Sat 4/182:24 pm
SUN
- ONT
1 stop7h 12m
United Airlines
Deal found 3/7![United Airlines logo]()
$319
This Delta deal was found by Cheapflights users on 3/9. 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 5/114:57 pm
ONT
- GEG
2 stops7h 02m
Delta
Tue 5/126:10 am
GEG
- ONT
1 stop5h 02m
Delta
Deal found 3/9![Delta logo]()
$252
This Southwest deal was found by Cheapflights users on 3/9. 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 4/169:25 am
ONT
- GEG
2 stops7h 35m
Southwest
Thu 4/232:50 pm
GEG
- ONT
1 stop7h 50m
Southwest
Deal found 3/9![Southwest logo]()
$308
This United Airlines deal was found by Cheapflights users on 3/7. 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 6/31:18 pm
ONT
- GEG
1 stop7h 47m
United Airlines
Mon 6/86:00 am
GEG
- ONT
1 stop6h 12m
United Airlines
Deal found 3/7![United Airlines logo]()
$321
This Delta deal was found by Cheapflights users on 3/7. 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 6/25:50 pm
ONT
- BOI
1 stop5h 03m
Delta
Sat 6/65:45 am
BOI
- ONT
1 stop7h 48m
Delta
Deal found 3/7![Delta logo]()
$257
This Alaska Airlines deal was found by Cheapflights users on 3/7. 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.
Sat 7/252:09 pm
ONT
- GEG
1 stop6h 50m
Alaska Airlines
Sat 8/15:07 am
GEG
- ONT
1 stop6h 07m
Alaska Airlines
Deal found 3/7![Alaska Airlines logo]()
$321
This Delta deal was found by Cheapflights users on 3/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/66:00 am
ONT
- SUN
1 stop4h 54m
Delta
Fri 4/1012:40 pm
SUN
- ONT
1 stop4h 48m
Delta
Deal found 3/11![Delta logo]()
$269
This United Airlines deal was found by Cheapflights users on 3/7. 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.
Mon 3/236:15 am
ONT
- JAC
1 stop7h 05m
United Airlines
Sat 3/284:16 pm
JAC
- ONT
1 stop5h 34m
United Airlines
Deal found 3/7![United Airlines logo]()
$359
This Delta deal was found by Cheapflights users on 3/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/75:09 pm
ONT
- SUN
1 stop3h 41m
Delta
Tue 4/147:15 am
SUN
- ONT
1 stop5h 59m
Delta
Deal found 3/11![Delta logo]()
$269
This United Airlines deal was found by Cheapflights users on 3/8. 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.
Sun 3/295:10 am
ONT
- SUN
1 stop7h 25m
United Airlines
Thu 4/27:00 am
SUN
- ONT
1 stop6h 38m
United Airlines
Deal found 3/8![United Airlines logo]()
$359
This Alaska Airlines deal was found by Cheapflights users on 3/8. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/1812:02 pm
ONT
- SUN
1 stop5h 59m
Alaska Airlines
Sat 8/2210:20 am
SUN
- ONT
1 stop5h 27m
Alaska Airlines
Deal found 3/8![Alaska Airlines logo]()
$330
This Delta deal was found by Cheapflights users on 3/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/66:00 am
ONT
- SUN
1 stop4h 54m
Delta
Tue 4/1412:42 pm
SUN
- ONT
1 stop4h 43m
Delta
Deal found 3/11![Delta logo]()
$269
This United Airlines deal was found by Cheapflights users on 3/7. 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 3/226:15 am
ONT
- SUN
1 stop5h 17m
United Airlines
Thu 3/267:00 am
SUN
- ONT
1 stop6h 48m
United Airlines
Deal found 3/7![United Airlines logo]()
$359
This Alaska Airlines deal was found by Cheapflights users on 3/9. 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.
Mon 4/277:59 pm
ONT
- IDA
1 stop18h 30m
Alaska Airlines
Sat 5/26:00 am
IDA
- ONT
2 stops9h 19m
Alaska Airlines
Deal found 3/9![Alaska Airlines logo]()
$352
This United Airlines deal was found by Cheapflights users on 3/11. 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.
Wed 3/255:15 am
ONT
- JAC
1 stop7h 06m
United Airlines
Sat 3/284:16 pm
JAC
- ONT
1 stop5h 34m
United Airlines
Deal found 3/11![United Airlines logo]()
$379
Last-minute flights from Ontario to IdahoDiscover last-minute flight deals from Ontario to Idaho. Data last updated March 12, 2026 and is based on user searches.
Discover last-minute flight deals from Ontario to Idaho. Data last updated March 12, 2026 and is based on user searches.
This CheapOair deal was found by Cheapflights users on 3/7. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/186:15 am
ONT
- GEG
1 stop28h 32m
Frontier
Sun 3/2911:33 am
GEG
- ONT
1 stop12h 26m
Frontier
Deal found 3/7![Frontier logo]()
$227
This Alaska Airlines deal was found by Cheapflights users on 3/8. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/76:25 pm
ONT
- BOI
Nonstop2h 01m
Alaska Airlines
Tue 4/1411:58 am
BOI
- ONT
1 stop22h 41m
Alaska Airlines
Deal found 3/8![Alaska Airlines logo]()
$171
This Southwest deal was found by Cheapflights users on 3/10. 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.
Sat 4/116:45 am
ONT
- BOI
1 stop7h 05m
Southwest
Sat 4/183:25 pm
BOI
- ONT
2 stops6h 20m
Southwest
Deal found 3/10![Southwest logo]()
$168
This Alaska Airlines deal was found by Cheapflights users on 3/9. 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 4/146:25 pm
ONT
- BOI
Nonstop2h 01m
Alaska Airlines
Sat 4/184:40 pm
BOI
- ONT
Nonstop2h 05m
Alaska Airlines
Deal found 3/9![Alaska Airlines logo]()
$137
This Alaska Airlines deal was found by Cheapflights users on 3/9. 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 4/146:25 pm
ONT
- BOI
Nonstop2h 01m
Alaska Airlines
Wed 4/221:15 pm
BOI
- ONT
Nonstop2h 04m
Alaska Airlines
Deal found 3/9![Alaska Airlines logo]()
$177
This Alaska Airlines deal was found by Cheapflights users on 3/9. 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.
Wed 4/156:25 pm
ONT
- BOI
Nonstop2h 01m
Alaska Airlines
Sat 4/184:40 pm
BOI
- ONT
Nonstop2h 05m
Alaska Airlines
Deal found 3/9![Alaska Airlines logo]()
$147
This Southwest deal was found by Cheapflights users on 3/10. 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 4/153:45 pm
ONT
- BOI
1 stop6h 35m
Southwest
Sat 4/188:50 am
BOI
- ONT
1 stop4h 25m
Southwest
Deal found 3/10![Southwest logo]()
$157
This Expedia deal was found by Cheapflights users on 3/8. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/1512:59 am
ONT
- GEG
1 stop9h 50m
Frontier
Thu 4/2311:44 am
GEG
- ONT
1 stop19h 47m
Frontier
Deal found 3/8![Frontier logo]()
$160
This Delta deal was found by Cheapflights users on 3/9. 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 4/165:55 pm
ONT
- LWS
1 stop6h 13m
Delta
Sat 4/256:09 am
LWS
- ONT
1 stop5h 04m
Delta
Deal found 3/9![Delta logo]()
$214
This Kiwi.com deal was found by Cheapflights users on 3/11. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/227:44 pm
ONT
- GEG
1 stop24h 45m
Multiple Airlines
Sun 4/269:19 pm
GEG
- ONT
1 stop15h 51m
Multiple Airlines
Deal found 3/11![Multiple Airlines logo]()
$201
This Southwest deal was found by Cheapflights users on 3/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/245:05 pm
ONT
- BOI
1 stop6h 40m
Southwest
Tue 4/282:00 pm
BOI
- ONT
1 stop6h 35m
Southwest
Deal found 3/11![Southwest logo]()
$174
This Alaska Airlines deal was found by Cheapflights users on 3/7. 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.
Sat 4/2510:39 am
ONT
- BOI
1 stop6h 55m
Alaska Airlines
Tue 4/281:15 pm
BOI
- ONT
Nonstop2h 04m
Alaska Airlines
Deal found 3/7![Alaska Airlines logo]()
$181
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 March 12, 2026.
Search for one-way flight options from Ontario to Idaho. Find affordable one-way fares based on user searches. Data last updated March 12, 2026.
This Southwest deal was found by Cheapflights users on 3/10. 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 5/66:55 am
ONT
- BOI
1 stop7h 30m
Southwest
Deal found 3/10![Southwest logo]()
$76
This Southwest deal was found by Cheapflights users on 3/8. 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.
Tue 3/314:35 pm
ONT
- BOI
1 stop6h 15m
Southwest
Deal found 3/8![Southwest logo]()
$79
This Frontier deal was found by Cheapflights users on 3/9. 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.
Wed 4/1512:59 am
ONT
- GEG
1 stop9h 50m
Frontier
Deal found 3/9![Frontier logo]()
$86
This Frontier deal was found by Cheapflights users on 3/9. 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.
Wed 4/1512:59 am
ONT
- BOI
1 stop9h 09m
Frontier
Deal found 3/9![Frontier logo]()
$86
This Trip.com deal was found by Cheapflights users on 3/7. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/2711:28 am
ONT
- GEG
1 stop23h 07m
Frontier
Deal found 3/7![Frontier logo]()
$89
This Alaska Airlines deal was found by Cheapflights users on 3/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/146:25 pm
ONT
- BOI
Nonstop2h 01m
Alaska Airlines
Deal found 3/10![Alaska Airlines logo]()
$89
This Trip.com deal was found by Cheapflights users on 3/10. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/2512:59 am
ONT
- GEG
1 stop9h 50m
Frontier
Deal found 3/10![Frontier logo]()
$90
This Frontier deal was found by Cheapflights users on 3/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/196:00 am
ONT
- BOI
1 stop5h 27m
Frontier
Deal found 3/11![Frontier logo]()
$90
This CheapOair deal was found by Cheapflights users on 3/8. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/111:28 am
ONT
- GEG
1 stop23h 07m
Frontier
Deal found 3/8![Frontier logo]()
$92
This CheapOair deal was found by Cheapflights users on 3/7. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/86:20 am
ONT
- BOI
1 stop27h 48m
Frontier
Deal found 3/7![Frontier logo]()
$92
This Delta deal was found by Cheapflights users on 3/8. 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.
Tue 4/215:55 pm
ONT
- BOI
1 stop5h 22m
Delta
Deal found 3/8![Delta logo]()
$94
This Frontier deal was found by Cheapflights users on 3/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/1312:59 am
ONT
- GEG
1 stop9h 32m
Frontier
Deal found 3/10![Frontier logo]()
$96
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 March 12, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $137 (Alaska Airlines) |
One-way from | $76 (Southwest) |
Popular in | February |
Cheapest in | April |
Average price | $341 |
Good round-trip deal | $157 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 March 12, 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
Wed 4/15
6:25 pm-9:26 pm
Nonstop2h 01m
Boise Air Term. Gowen Fld
Sat 4/18
4:40 pm-5:45 pm
Nonstop2h 05m
$147
OntarioSpokane
ONT - GEG
ONTGEG
Ontario
Fri 5/1
2:20 pm-9:02 pm
1 stop6h 42m
Spokane
Mon 5/4
6:15 am-11:13 am
1 stop4h 58m
$167
OntarioBoise
ONT - BOI
ONTBOI
Ontario
Tue 4/14
7:00 am-4:14 pm
1 stop8h 14m
Boise Air Term. Gowen Fld
Sat 4/18
5:40 am-11:13 am
1 stop6h 33m
$167
Quickest round-trip
OntarioBoise
ONT - BOI
ONTBOI
Ontario
Thu 5/14
7:48 pm-10:47 pm
Nonstop1h 59m
Boise Air Term. Gowen Fld
Mon 5/18
4:14 pm-5:17 pm
Nonstop2h 03m
$177
OntarioBoise
ONT - BOI
ONTBOI
Ontario
Thu 4/16
6:25 pm-9:26 pm
Nonstop2h 01m
Boise Air Term. Gowen Fld
Wed 4/22
1:15 pm-2:19 pm
Nonstop2h 04m
$197
OntarioLewiston
ONT - LWS
ONTLWS
Ontario
Thu 4/16
5:55 pm-12:08 am
1 stop6h 13m
Lewiston Nez Perce Rgnl
Sat 4/25
6:09 am-4:25 pm
2 stops10h 16m
$220
OntarioSpokane
ONT - GEG
ONTGEG
Ontario
Wed 5/13
1:29 pm-11:59 pm
2 stops10h 30m
Spokane
Sun 5/17
7:23 pm-11:12 am
1 stop15h 49m
$231
OntarioSpokane
ONT - GEG
ONTGEG
Ontario
Tue 4/21
6:00 am-11:10 pm
1 stop17h 10m
Spokane
Sat 4/25
5:00 am-10:32 pm
1 stop17h 32m
$245
OntarioSpokane
ONT - GEG
ONTGEG
Ontario
Tue 5/12
6:45 am-12:13 pm
1 stop5h 28m
Spokane
Tue 5/12
7:23 pm-11:12 am
1 stop15h 49m
$247
OntarioBoise
ONT - BOI
ONTBOI
Ontario
Fri 5/8
7:59 pm-9:42 am
1 stop12h 43m
Boise Air Term. Gowen Fld
Mon 5/11
1:15 pm-2:19 pm
Nonstop2h 04m
$251
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-LWS
ONT-SUN
ONT-JAC
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-LWS
ONT-SUN
What is the cheapest month to book a flight from Ontario to Idaho?
Currently, November is the cheapest month in which you can book a flight from Ontario to Idaho (average of $60). Flying from Ontario to Idaho in December is currently the most expensive (average of $159). 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 March 12, 2026.
Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Ontario to Idaho as you normally would.
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 March 12, 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.
Comfort
7.8
Overall
8.0
Crew
8.5
Entertainment
7.0
Food
7.1
Boarding
8.1
Reviews
1 / 20
10.0
ExcellentFranzi,Mar 2026
SFO - PDX
Comfort
7.8
Overall
8.0
Crew
8.5
Entertainment
7.0
Food
7.1
Boarding
8.1
Reviews
1 / 20
10.0
ExcellentFranzi,Mar 2026
SFO - PDX
Comfort
7.8
Overall
8.0
Crew
8.5
Entertainment
7.0
Food
7.1
Boarding
8.1
Reviews
1 / 20
10.0
ExcellentFranzi,Mar 2026
SFO - PDX
Comfort
7.8
Overall
8.0
Crew
8.5
Entertainment
7.0
Food
7.1
Boarding
8.1
Reviews
1 / 20
10.0
ExcellentFranzi,Mar 2026
SFO - PDX
Comfort
7.8
Overall
8.0
Crew
8.5
Entertainment
7.0
Food
7.1
Boarding
8.1
Reviews
1 / 20
10.0
ExcellentFranzi,Mar 2026
SFO - PDX
Comfort
7.8
Overall
8.0
Crew
8.5
Entertainment
7.0
Food
7.1
Boarding
8.1
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.
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Alternative routes for Ontario to Idaho
See prices for flight routes from nearby airports that may be better suited for you.
Complete your trip
Complete your trip to Idaho by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from Ontario to Idaho by cabin class
Find flights from Ontario to Idaho, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Ontario and Idaho flights
Browse other Ontario and Idaho flight options. Last updated on March 12, 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 5 airlines flying from Ontario to Idaho
Discover the top 5 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 March 12, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$137 | Average$239 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$153 | Average$341 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$196 | Average$315 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$220 | Average$353 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$227 | Average$516 | FlexibilityNo cancel fee | On-time71% |