$70+ Cheap flights from Ontario to Boise (ONT - BOI)
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 5/17. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — BOI
May 3 — May 101
Round-trip
1 adult, Economy
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Find cheap flights from Ontario to Boise 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.Cheapflights Tip: The best prices from Ontario to Boise Air Term. Gowen Fld are usually found in January or September, booked 87 days in advance, depart on a Wednesday or Monday and return on a Saturday
Cheap flight deals from Ontario to Boise
Cheapest
Best
Last-minute
One-way
Cheapest flights from Ontario to BoiseExplore the most affordable flight options available from Ontario to Boise. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 3, 2026.
Explore the most affordable flight options available from Ontario to Boise. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 3, 2026.
This CheapOair deal was found by Cheapflights users on 4/2. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/167:48 pm
ONT
- BOI
Nonstop1h 59m
Alaska Airlines
Sat 5/234:14 pm
BOI
- ONT
Nonstop2h 03m
Alaska Airlines
Deal found 4/2![Alaska Airlines logo]()
$137
This Alaska Airlines deal was found by Cheapflights users on 3/30. Clicking the “Pick Dates” 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 4/222:59 pm
ONT
- BOI
Nonstop2h 00m
Alaska Airlines
Sat 4/251:15 pm
BOI
- ONT
Nonstop2h 04m
Alaska Airlines
Deal found 3/30![Alaska Airlines logo]()
$157
This Expedia deal was found by Cheapflights users on 3/29. Clicking the “Pick Dates” 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
- BOI
1 stop9h 09m
Frontier
Sun 4/1911:53 am
BOI
- ONT
1 stop20h 38m
Frontier
Deal found 3/29![Frontier logo]()
$160
This Delta deal was found by Cheapflights users on 4/1. Clicking the “Pick Dates” 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 4/222:20 pm
ONT
- BOI
1 stop7h 04m
Delta
Wed 4/298:30 am
BOI
- ONT
1 stop4h 44m
Delta
Deal found 4/1![Delta logo]()
$167
This Southwest deal was found by Cheapflights users on 4/1. Clicking the “Pick Dates” 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 4/283:45 pm
ONT
- BOI
2 stops7h 40m
Southwest
Wed 4/294:05 pm
BOI
- ONT
1 stop6h 25m
Southwest
Deal found 4/1![Southwest logo]()
$172
This Alaska Airlines deal was found by Cheapflights users on 3/30. Clicking the “Pick Dates” 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 5/22:59 pm
ONT
- BOI
Nonstop2h 00m
Alaska Airlines
Tue 5/51:15 pm
BOI
- ONT
Nonstop2h 04m
Alaska Airlines
Deal found 3/30![Alaska Airlines logo]()
$177
This Southwest deal was found by Cheapflights users on 3/30. Clicking the “Pick Dates” 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 4/283:45 pm
ONT
- BOI
1 stop6h 35m
Southwest
Tue 5/52:00 pm
BOI
- ONT
2 stops6h 40m
Southwest
Deal found 3/30![Southwest logo]()
$182
This Expedia deal was found by Cheapflights users on 4/2. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/22:59 pm
ONT
- BOI
Nonstop2h 00m
Multiple Airlines
Thu 5/71:22 pm
BOI
- ONT
1 stop21h 43m
Multiple Airlines
Deal found 4/2![Multiple Airlines logo]()
$184
This Alaska Airlines deal was found by Cheapflights users on 3/31. Clicking the “Pick Dates” 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 5/12:59 pm
ONT
- BOI
Nonstop2h 00m
Alaska Airlines
Sat 5/164:14 pm
BOI
- ONT
Nonstop2h 03m
Alaska Airlines
Deal found 3/31![Alaska Airlines logo]()
$187
This Southwest deal was found by Cheapflights users on 4/3. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/93:35 pm
ONT
- BOI
2 stops6h 40m
Southwest
Mon 5/117:55 pm
BOI
- ONT
1 stop4h 10m
Southwest
Deal found 4/3![Southwest logo]()
$192
This Delta deal was found by Cheapflights users on 3/31. Clicking the “Pick Dates” 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 5/15:05 pm
ONT
- BOI
1 stop3h 51m
Delta
Sat 5/166:41 pm
BOI
- ONT
1 stop5h 04m
Delta
Deal found 3/31![Delta logo]()
$197
Best flights from Ontario to BoiseDiscover carefully curated flight deals from Ontario to Boise that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated April 3, 2026.
Discover carefully curated flight deals from Ontario to Boise that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated April 3, 2026.
This Southwest deal was found by Cheapflights users on 3/31. Clicking the “Pick Dates” 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 5/59:05 am
ONT
- BOI
1 stop4h 35m
Southwest
Tue 5/54:05 pm
BOI
- ONT
1 stop6h 40m
Southwest
Deal found 3/31![Southwest logo]()
$177
This Alaska Airlines deal was found by Cheapflights users on 3/30. Clicking the “Pick Dates” 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 5/22:59 pm
ONT
- BOI
Nonstop2h 00m
Alaska Airlines
Tue 5/51:15 pm
BOI
- ONT
Nonstop2h 04m
Alaska Airlines
Deal found 3/30![Alaska Airlines logo]()
$177
This Delta deal was found by Cheapflights users on 4/3. 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.
Fri 5/15:05 pm
ONT
- BOI
1 stop5h 52m
Delta
Sat 5/166:00 pm
BOI
- ONT
1 stop5h 34m
Delta
Deal found 4/3![Delta logo]()
$187
This United Airlines deal was found by Cheapflights users on 4/1. Clicking the “Pick Dates” 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 5/281:50 pm
ONT
- BOI
1 stop6h 50m
United Airlines
Mon 6/17:05 pm
BOI
- ONT
1 stop4h 32m
United Airlines
Deal found 4/1![United Airlines logo]()
$342
This Southwest deal was found by Cheapflights users on 4/2. 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.
Wed 5/63:45 pm
ONT
- BOI
2 stops7h 40m
Southwest
Wed 5/136:40 am
BOI
- ONT
2 stops5h 55m
Southwest
Deal found 4/2![Southwest logo]()
$281
This Delta deal was found by Cheapflights users on 4/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/411:57 am
ONT
- BOI
1 stop6h 16m
Delta
Tue 7/76:49 am
BOI
- ONT
1 stop7h 13m
Delta
Deal found 4/1![Delta logo]()
$297
This Alaska Airlines deal was found by Cheapflights users on 3/30. Clicking the “Pick Dates” 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 7/254:18 pm
ONT
- BOI
Nonstop1h 55m
Alaska Airlines
Mon 7/272:31 pm
BOI
- ONT
Nonstop2h 07m
Alaska Airlines
Deal found 3/30![Alaska Airlines logo]()
$307
This Alaska Airlines deal was found by Cheapflights users on 3/31. Clicking the “Pick Dates” 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 5/52:59 pm
ONT
- BOI
Nonstop2h 00m
Alaska Airlines
Tue 5/58:10 pm
BOI
- ONT
1 stop4h 38m
Alaska Airlines
Deal found 3/31![Alaska Airlines logo]()
$311
This Southwest deal was found by Cheapflights users on 3/29. Clicking the “Pick Dates” 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 7/26:30 pm
ONT
- BOI
1 stop4h 45m
Southwest
Mon 7/66:00 am
BOI
- ONT
2 stops6h 20m
Southwest
Deal found 3/29![Southwest logo]()
$352
This Alaska Airlines deal was found by Cheapflights users on 4/2. 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 7/75:26 pm
ONT
- BOI
1 stop5h 38m
Alaska Airlines
Tue 7/282:31 pm
BOI
- ONT
Nonstop2h 07m
Alaska Airlines
Deal found 4/2![Alaska Airlines logo]()
$357
This Alaska Airlines deal was found by Cheapflights users on 3/29. Clicking the “Pick Dates” 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 7/204:18 pm
ONT
- BOI
Nonstop1h 55m
Alaska Airlines
Thu 7/306:23 am
BOI
- ONT
1 stop7h 46m
Alaska Airlines
Deal found 3/29![Alaska Airlines logo]()
$357
Last-minute flights from Ontario to BoiseDiscover last-minute flight deals from Ontario to Boise. Data last updated April 3, 2026 and is based on user searches.
Discover last-minute flight deals from Ontario to Boise. Data last updated April 3, 2026 and is based on user searches.
This Expedia deal was found by Cheapflights users on 3/29. Clicking the “Pick Dates” 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
- BOI
1 stop9h 09m
Frontier
Sun 4/1911:53 am
BOI
- ONT
1 stop20h 38m
Frontier
Deal found 3/29![Frontier logo]()
$160
This Alaska Airlines deal was found by Cheapflights users on 3/30. Clicking the “Pick Dates” 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 4/222:59 pm
ONT
- BOI
Nonstop2h 00m
Alaska Airlines
Sat 4/251:15 pm
BOI
- ONT
Nonstop2h 04m
Alaska Airlines
Deal found 3/30![Alaska Airlines logo]()
$157
This Delta deal was found by Cheapflights users on 4/1. Clicking the “Pick Dates” 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 4/222:20 pm
ONT
- BOI
1 stop7h 04m
Delta
Wed 4/298:30 am
BOI
- ONT
1 stop4h 44m
Delta
Deal found 4/1![Delta logo]()
$167
This Southwest deal was found by Cheapflights users on 4/1. Clicking the “Pick Dates” 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 4/283:45 pm
ONT
- BOI
2 stops7h 40m
Southwest
Wed 4/294:05 pm
BOI
- ONT
1 stop6h 25m
Southwest
Deal found 4/1![Southwest logo]()
$172
This Southwest deal was found by Cheapflights users on 3/30. Clicking the “Pick Dates” 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 4/283:45 pm
ONT
- BOI
1 stop6h 35m
Southwest
Tue 5/52:00 pm
BOI
- ONT
2 stops6h 40m
Southwest
Deal found 3/30![Southwest logo]()
$182
This Alaska Airlines deal was found by Cheapflights users on 3/31. Clicking the “Pick Dates” 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 5/12:59 pm
ONT
- BOI
Nonstop2h 00m
Alaska Airlines
Sat 5/164:14 pm
BOI
- ONT
Nonstop2h 03m
Alaska Airlines
Deal found 3/31![Alaska Airlines logo]()
$187
This Delta deal was found by Cheapflights users on 3/31. Clicking the “Pick Dates” 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 5/15:05 pm
ONT
- BOI
1 stop3h 51m
Delta
Sat 5/166:41 pm
BOI
- ONT
1 stop5h 04m
Delta
Deal found 3/31![Delta logo]()
$197
This Alaska Airlines deal was found by Cheapflights users on 3/30. Clicking the “Pick Dates” 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 5/22:59 pm
ONT
- BOI
Nonstop2h 00m
Alaska Airlines
Tue 5/51:15 pm
BOI
- ONT
Nonstop2h 04m
Alaska Airlines
Deal found 3/30![Alaska Airlines logo]()
$177
This Expedia deal was found by Cheapflights users on 4/2. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/22:59 pm
ONT
- BOI
Nonstop2h 00m
Multiple Airlines
Thu 5/71:22 pm
BOI
- ONT
1 stop21h 43m
Multiple Airlines
Deal found 4/2![Multiple Airlines logo]()
$184
This Southwest deal was found by Cheapflights users on 4/3. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/93:35 pm
ONT
- BOI
2 stops6h 40m
Southwest
Mon 5/117:55 pm
BOI
- ONT
1 stop4h 10m
Southwest
Deal found 4/3![Southwest logo]()
$192
This CheapOair deal was found by Cheapflights users on 4/2. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/167:48 pm
ONT
- BOI
Nonstop1h 59m
Alaska Airlines
Sat 5/234:14 pm
BOI
- ONT
Nonstop2h 03m
Alaska Airlines
Deal found 4/2![Alaska Airlines logo]()
$137
One-way flights from Ontario to BoiseSearch for one-way flight options from Ontario to Boise. Find affordable one-way fares based on user searches. Data last updated April 3, 2026.
Search for one-way flight options from Ontario to Boise. Find affordable one-way fares based on user searches. Data last updated April 3, 2026.
This Frontier deal was found by Cheapflights users on 4/1. Clicking the “Pick Dates” 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 5/176:00 am
ONT
- BOI
1 stop5h 27m
Frontier
Deal found 4/1![Frontier logo]()
$70
This Southwest deal was found by Cheapflights users on 3/31. Clicking the “Pick Dates” 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
1 stop6h 35m
Southwest
Deal found 3/31![Southwest logo]()
$84
This Southwest deal was found by Cheapflights users on 3/30. Clicking the “Pick Dates” 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 4/256:20 pm
ONT
- BOI
1 stop3h 55m
Southwest
Deal found 3/30![Southwest logo]()
$89
This Super.com deal was found by Cheapflights users on 3/31. Clicking the “Pick Dates” 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 4/1812:59 am
ONT
- BOI
1 stop9h 09m
Frontier
Deal found 3/31![Frontier logo]()
$95
This Alaska Airlines deal was found by Cheapflights users on 3/30. Clicking the “Pick Dates” 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 4/292:59 pm
ONT
- BOI
Nonstop2h 00m
Alaska Airlines
Deal found 3/30![Alaska Airlines logo]()
$99
This Delta deal was found by Cheapflights users on 4/1. Clicking the “Pick Dates” 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 4/222:20 pm
ONT
- BOI
1 stop7h 04m
Delta
Deal found 4/1![Delta logo]()
$104
This Southwest deal was found by Cheapflights users on 4/2. 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.
Mon 6/15:30 pm
ONT
- BOI
1 stop4h 25m
Southwest
Deal found 4/2![Southwest logo]()
$109
This Frontier deal was found by Cheapflights users on 3/30. Clicking the “Pick Dates” 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 5/146:00 am
ONT
- BOI
1 stop5h 27m
Frontier
Deal found 3/30![Frontier logo]()
$111
This Southwest deal was found by Cheapflights users on 3/30. Clicking the “Pick Dates” 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 4/276:00 pm
ONT
- BOI
1 stop6h 00m
Southwest
Deal found 3/30![Southwest logo]()
$114
This Super.com deal was found by Cheapflights users on 3/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/86:20 am
ONT
- BOI
1 stop27h 48m
Frontier
Deal found 3/30![Frontier logo]()
$115
This Alaska Airlines deal was found by Cheapflights users on 4/1. Clicking the “Pick Dates” 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 4/252:59 pm
ONT
- BOI
Nonstop2h 00m
Alaska Airlines
Deal found 4/1![Alaska Airlines logo]()
$119
This CheapOair deal was found by Cheapflights users on 4/2. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/1010:50 am
ONT
- BOI
1 stop24h 19m
Frontier
Deal found 4/2![Frontier logo]()
$127
Find flight deals from Ontario to Boise
Discover tips and strategies to find the most affordable flight options for your journey from Ontario (ONT) to Boise (BOI). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated April 3, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $137 (CheapOair) |
One-way from | $70 (Frontier) |
Popular in | March |
Cheapest in | January |
Average price | $281 |
Good round-trip deal | $257 or less |
Good one-way deal | $308 or less |
Cheapflights Fare Finder
Customize your flight search to find flights from Ontario to Boise 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 April 3, 2026.
Use the filters below to find and compare flights from Ontario to Boise that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
OntarioBoise
ONT - BOI
ONTBOI
Ontario
Tue 5/5
9:05 am-2:40 pm
1 stop4h 35m
Boise Air Term. Gowen Fld
Tue 5/5
4:05 pm-9:45 pm
1 stop6h 40m
$177
OntarioBoise
ONT - BOI
ONTBOI
Ontario
Sat 5/2
2:59 pm-5:59 pm
Nonstop2h 00m
Boise Air Term. Gowen Fld
Tue 5/5
1:15 pm-2:19 pm
Nonstop2h 04m
$177
OntarioBoise
ONT - BOI
ONTBOI
Ontario
Fri 5/1
5:05 pm-11:57 pm
1 stop5h 52m
Boise Air Term. Gowen Fld
Sat 5/16
6:00 pm-10:34 pm
1 stop5h 34m
$187
OntarioBoise
ONT - BOI
ONTBOI
Ontario
Wed 5/6
3:45 pm-12:25 am
2 stops7h 40m
Boise Air Term. Gowen Fld
Wed 5/13
6:40 am-11:35 am
2 stops5h 55m
$281
OntarioBoise
ONT - BOI
ONTBOI
Ontario
Sat 7/4
11:57 am-7:13 pm
1 stop6h 16m
Boise Air Term. Gowen Fld
Tue 7/7
6:49 am-1:02 pm
1 stop7h 13m
$297
Quickest round-trip
OntarioBoise
ONT - BOI
ONTBOI
Ontario
Sat 7/25
4:18 pm-7:13 pm
Nonstop1h 55m
Boise Air Term. Gowen Fld
Mon 7/27
2:31 pm-3:38 pm
Nonstop2h 07m
$307
OntarioBoise
ONT - BOI
ONTBOI
Ontario
Tue 5/5
2:59 pm-5:59 pm
Nonstop2h 00m
Boise Air Term. Gowen Fld
Tue 5/5
8:10 pm-11:48 pm
1 stop4h 38m
$311
OntarioBoise
ONT - BOI
ONTBOI
Ontario
Thu 5/28
1:50 pm-9:40 pm
1 stop6h 50m
Boise Air Term. Gowen Fld
Mon 6/1
7:05 pm-10:37 pm
1 stop4h 32m
$342
OntarioBoise
ONT - BOI
ONTBOI
Ontario
Thu 7/2
6:30 pm-12:15 am
1 stop4h 45m
Boise Air Term. Gowen Fld
Mon 7/6
6:00 am-11:20 am
2 stops6h 20m
$352
OntarioBoise
ONT - BOI
ONTBOI
Ontario
Tue 7/7
5:26 pm-12:04 am
1 stop5h 38m
Boise Air Term. Gowen Fld
Tue 7/28
2:31 pm-3:38 pm
Nonstop2h 07m
$357
Showing 1-10 of 21 resultsSorted by cheapest first
Compare providers for flights from Ontario to Boise
Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Ontario to Boise in April.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy- | Trust Score*1 star |
- Most accurate provider: When it comes to deals on Ontario-Boise flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Ontario-Boise flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Ontario-Boise flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on Ontario-Boise flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Ontario-Boise flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.
Best time to book a flight from Ontario to Boise
Have a flexible travel schedule? Discover the best time to fly to Boise from Ontario with our price prediction graph.
ONT-BOI
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 Boise
Prices
More
How far ahead should I book a flight from Ontario to Boise?
Use this chart to determine the optimal time to book a round-trip flight from Ontario to Boise. Price data was last updated on April 2, 2026.
The best time to book flights from Ontario to Boise is 87 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.
What is the cheapest month to book a flight from Ontario to Boise?
Currently, May is the cheapest month in which you can book a flight from Ontario to Boise (average of $66). Flying from Ontario to Boise in November is currently the most expensive (average of $182). 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 BOI?
Find hourly flight availability from Ontario to Boise. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated April 3, 2026.
It’s typically best to fly out from Ontario to Boise at noon. Doing so could potentially save you 64% on the flight price compared to flying in the morning, which is usually more expensive.
What’s the top layover airport for flights from Ontario to Boise?
Share of 1-stop round-trip flights from Ontario to Boise chosen by Cheapflights users in the past 12 months, using the same layover each way.
Seattle (SEA) – chosen by Cheapflights users on 40% of 1-stop itineraries from Ontario to Boise on Cheapflights.
What’s the cheapest layover airport for flights from Ontario to Boise?
Average round-trip fare for 1-stop flights from Ontario to Boise, chosen by Cheapflights users in the past 12 months, with the same layover each way.
Seattle (SEA) is the most affordable 1-stop option, with an average round-trip price of $243.
What’s the fastest layover option from Ontario to Boise?
Shortest average travel time for 1-stop one-way flights from Ontario to Boise, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by layover airport.
Flights via San Francisco (SFO) have the shortest average one-way travel time for 1-stop routes: 4h 24m.
Which airport typically offers the quickest layover for flights from Ontario to Boise?
Average layover duration for 1-stop one-way flights from Ontario to Boise, chosen by Cheapflights users in the last 12 months, grouped by stopover airport.
Flights via Portland (PDX) offer the fastest connection on this route, with an average layover time of 0h 57m.
Reviews of airlines servicing Boise
Get insights into the airlines that provide service to Boise. 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 Boise. Reviews last updated April 3, 2026.
Get a feel of what it's like to fly with Southwest,Alaska Airlines, andDelta from Ontario to Boise by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Crew
8.6
Food
7.0
Comfort
8.0
Overall
8.0
Entertainment
7.5
Boarding
8.1
Reviews
1 / 20
10.0
ExcellentWilliam Drew,Nov 2025
SJC - HNL
Crew
8.6
Food
7.0
Comfort
8.0
Overall
8.0
Entertainment
7.5
Boarding
8.1
Reviews
1 / 20
10.0
ExcellentWilliam Drew,Nov 2025
SJC - HNL
Crew
8.6
Food
7.0
Comfort
8.0
Overall
8.0
Entertainment
7.5
Boarding
8.1
Reviews
1 / 20
10.0
ExcellentWilliam Drew,Nov 2025
SJC - HNL
Crew
8.6
Food
7.0
Comfort
8.0
Overall
8.0
Entertainment
7.5
Boarding
8.1
Reviews
1 / 20
10.0
ExcellentWilliam Drew,Nov 2025
SJC - HNL
Crew
8.6
Food
7.0
Comfort
8.0
Overall
8.0
Entertainment
7.5
Boarding
8.1
Reviews
1 / 20
10.0
ExcellentWilliam Drew,Nov 2025
SJC - HNL
Related info for your journey
Find useful and relevant information for your journey from Ontario to Boise. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
Traveling to a place near Boise?
Book flights to Boise if you plan to visit one of these locationsOntario
Meridian
Nampa
Caldwell
McCall
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Other flights to Boise
Explore flights to Boise departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on April 3, 2026.
Complete your trip
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Search flights from Ontario to Boise by cabin class
Find flights from Ontario to Boise, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Ontario and Boise flights
Browse other Ontario and Boise flight options. Last updated on April 3, 2026.
Other flights from Ontario
Browse through other flights departing from Ontario. Flights are based on user searches made on Cheapflights and were last updated on April 3, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Top 4 airlines flying from Ontario to Boise
Discover the top 4 airlines that operate flights from Ontario to Boise. 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 April 3, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$137 | Average$247 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$153 | Average$258 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$190 | Average$355 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$196 | Average$315 | FlexibilityNo cancel fee | On-time69% |