$79+ Cheap flights from Boise to Ontario (BOI - ONT)
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 5/5. Fares are subject to change and may not be available on all flights or dates of travel.
BOI — ONT
Apr 16 — Apr 231
Round-trip
1 adult, Economy
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Find cheap flights from Boise to Ontario 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 Boise Air Term. Gowen Fld to Ontario are usually found in August or January, booked 36 days in advance, depart on a Saturday or Tuesday and return on a Friday
Cheap flight deals from Boise to Ontario
Cheapest
Best
Last-minute
One-way
Cheapest flights from Boise to OntarioExplore the most affordable flight options available from Boise to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 17, 2026.
Explore the most affordable flight options available from Boise to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 17, 2026.
This Alaska Airlines deal was found by Cheapflights users on 3/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/184:40 pm
BOI
- ONT
Nonstop2h 05m
Alaska Airlines
Tue 4/216:25 pm
ONT
- BOI
Nonstop2h 01m
Alaska Airlines
Deal found 3/12![Alaska Airlines logo]()
$137
This Southwest deal was found by Cheapflights users on 3/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/76:00 am
BOI
- ONT
1 stop4h 50m
Southwest
Tue 4/145:20 pm
ONT
- BOI
1 stop5h 00m
Southwest
Deal found 3/12![Southwest logo]()
$157
This Southwest deal was found by Cheapflights users on 3/14. Clicking the “Pick Dates” 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 4/155:15 pm
BOI
- ONT
1 stop5h 55m
Southwest
Sun 4/196:00 am
ONT
- BOI
1 stop4h 45m
Southwest
Deal found 3/14![Southwest logo]()
$177
This Southwest deal was found by Cheapflights users on 3/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/177:55 pm
BOI
- ONT
1 stop4h 10m
Southwest
Tue 4/216:15 am
ONT
- BOI
2 stops7h 25m
Southwest
Deal found 3/15![Southwest logo]()
$182
This Alaska Airlines deal was found by Cheapflights users on 3/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/47:20 pm
BOI
- ONT
1 stop5h 39m
Alaska Airlines
Sat 5/93:26 pm
ONT
- BOI
1 stop7h 33m
Alaska Airlines
Deal found 3/12![Alaska Airlines logo]()
$187
This Gotogate deal was found by Cheapflights users on 3/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/71:22 pm
BOI
- ONT
1 stop21h 43m
Frontier
Mon 5/1110:50 am
ONT
- BOI
1 stop24h 37m
Frontier
Deal found 3/15![Frontier logo]()
$190
This CheapOair deal was found by Cheapflights users on 3/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/1611:53 am
BOI
- ONT
1 stop20h 38m
Frontier
Sat 4/1812:59 am
ONT
- BOI
1 stop9h 09m
Frontier
Deal found 3/16![Frontier logo]()
$191
This United Airlines deal was found by Cheapflights users on 3/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/212:30 pm
BOI
- ONT
1 stop6h 17m
United Airlines
Sun 4/56:00 am
ONT
- BOI
1 stop4h 23m
United Airlines
Deal found 3/12![United Airlines logo]()
$197
This Southwest deal was found by Cheapflights users on 3/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/84:20 pm
BOI
- ONT
1 stop7h 20m
Southwest
Mon 5/115:05 pm
ONT
- BOI
2 stops6h 55m
Southwest
Deal found 3/16![Southwest logo]()
$202
Best flights from Boise to OntarioDiscover carefully curated flight deals from Boise to Ontario that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated March 17, 2026.
Discover carefully curated flight deals from Boise to Ontario that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated March 17, 2026.
This Alaska Airlines deal was found by Cheapflights users on 3/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/184:40 pm
BOI
- ONT
Nonstop2h 05m
Alaska Airlines
Tue 4/216:25 pm
ONT
- BOI
Nonstop2h 01m
Alaska Airlines
Deal found 3/13![Alaska Airlines logo]()
$137
This Southwest deal was found by Cheapflights users on 3/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/1411:35 am
BOI
- ONT
1 stop6h 30m
Southwest
Tue 4/214:30 pm
ONT
- BOI
2 stops5h 50m
Southwest
Deal found 3/16![Southwest logo]()
$162
This United Airlines deal was found by Cheapflights users on 3/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/34:05 pm
BOI
- ONT
1 stop7h 40m
United Airlines
Sat 4/41:27 pm
ONT
- BOI
1 stop6h 48m
United Airlines
Deal found 3/12![United Airlines logo]()
$262
This Southwest deal was found by Cheapflights users on 3/14. Clicking the “Pick Dates” 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 4/157:05 am
BOI
- ONT
1 stop4h 20m
Southwest
Sun 4/196:00 am
ONT
- BOI
1 stop4h 45m
Southwest
Deal found 3/14![Southwest logo]()
$177
This Southwest deal was found by Cheapflights users on 3/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/55:20 am
BOI
- ONT
1 stop5h 00m
Southwest
Sun 4/126:00 am
ONT
- BOI
1 stop4h 45m
Southwest
Deal found 3/13![Southwest logo]()
$197
This Alaska Airlines deal was found by Cheapflights users on 3/14. Clicking the “Pick Dates” 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 5/294:14 pm
BOI
- ONT
Nonstop2h 03m
Alaska Airlines
Sun 5/317:48 pm
ONT
- BOI
Nonstop1h 59m
Alaska Airlines
Deal found 3/14![Alaska Airlines logo]()
$277
This Southwest deal was found by Cheapflights users on 3/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/2011:35 am
BOI
- ONT
1 stop6h 30m
Southwest
Sun 5/244:20 pm
ONT
- BOI
2 stops6h 20m
Southwest
Deal found 3/12![Southwest logo]()
$272
This Southwest deal was found by Cheapflights users on 3/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/116:05 am
BOI
- ONT
2 stops6h 00m
Southwest
Sat 4/183:35 pm
ONT
- BOI
2 stops6h 40m
Southwest
Deal found 3/12![Southwest logo]()
$282
Last-minute flights from Boise to OntarioDiscover last-minute flight deals from Boise to Ontario. Data last updated March 17, 2026 and is based on user searches.
Discover last-minute flight deals from Boise to Ontario. Data last updated March 17, 2026 and is based on user searches.
This United Airlines deal was found by Cheapflights users on 3/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/212:30 pm
BOI
- ONT
1 stop6h 17m
United Airlines
Sun 4/56:00 am
ONT
- BOI
1 stop4h 23m
United Airlines
Deal found 3/12![United Airlines logo]()
$197
This Southwest deal was found by Cheapflights users on 3/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/76:00 am
BOI
- ONT
1 stop4h 50m
Southwest
Tue 4/145:20 pm
ONT
- BOI
1 stop5h 00m
Southwest
Deal found 3/12![Southwest logo]()
$157
This WAYA deal was found by Cheapflights users on 3/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure WAYA is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/77:20 am
BOI
- ONT
1 stop5h 49m
Multiple Airlines
Tue 4/146:25 pm
ONT
- BOI
Nonstop2h 01m
Multiple Airlines
Deal found 3/12![Multiple Airlines logo]()
$206
This Southwest deal was found by Cheapflights users on 3/14. Clicking the “Pick Dates” 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 4/155:15 pm
BOI
- ONT
1 stop5h 55m
Southwest
Sun 4/196:00 am
ONT
- BOI
1 stop4h 45m
Southwest
Deal found 3/14![Southwest logo]()
$177
This CheapOair deal was found by Cheapflights users on 3/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/1611:53 am
BOI
- ONT
1 stop20h 38m
Frontier
Sat 4/1812:59 am
ONT
- BOI
1 stop9h 09m
Frontier
Deal found 3/16![Frontier logo]()
$191
This Southwest deal was found by Cheapflights users on 3/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/177:55 pm
BOI
- ONT
1 stop4h 10m
Southwest
Tue 4/216:15 am
ONT
- BOI
2 stops7h 25m
Southwest
Deal found 3/15![Southwest logo]()
$182
This Alaska Airlines deal was found by Cheapflights users on 3/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/184:40 pm
BOI
- ONT
Nonstop2h 05m
Alaska Airlines
Tue 4/216:25 pm
ONT
- BOI
Nonstop2h 01m
Alaska Airlines
Deal found 3/12![Alaska Airlines logo]()
$137
This Southwest deal was found by Cheapflights users on 3/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/253:25 pm
BOI
- ONT
2 stops6h 20m
Southwest
Mon 4/275:05 pm
ONT
- BOI
2 stops6h 55m
Southwest
Deal found 3/15![Southwest logo]()
$187
One-way flights from Boise to OntarioSearch for one-way flight options from Boise to Ontario. Find affordable one-way fares based on user searches. Data last updated March 17, 2026.
Search for one-way flight options from Boise to Ontario. Find affordable one-way fares based on user searches. Data last updated March 17, 2026.
This Southwest deal was found by Cheapflights users on 3/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/57:05 am
BOI
- ONT
1 stop4h 20m
Southwest
Deal found 3/13![Southwest logo]()
$79
This Alaska Airlines deal was found by Cheapflights users on 3/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/54:38 pm
BOI
- ONT
1 stop6h 54m
Alaska Airlines
Deal found 3/12![Alaska Airlines logo]()
$89
This Frontier deal was found by Cheapflights users on 3/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/71:22 pm
BOI
- ONT
1 stop11h 27m
Frontier
Deal found 3/12![Frontier logo]()
$96
This United Airlines deal was found by Cheapflights users on 3/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/47:03 pm
BOI
- ONT
1 stop4h 42m
United Airlines
Deal found 3/13![United Airlines logo]()
$99
This Gotogate deal was found by Cheapflights users on 3/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/141:22 pm
BOI
- ONT
1 stop21h 43m
Frontier
Deal found 3/14![Frontier logo]()
$101
This Southwest deal was found by Cheapflights users on 3/14. Clicking the “Pick Dates” 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 4/206:00 am
BOI
- ONT
2 stops7h 10m
Southwest
Deal found 3/14![Southwest logo]()
$104
This Delta deal was found by Cheapflights users on 3/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/176:16 pm
BOI
- ONT
1 stop6h 28m
Delta
Deal found 3/13![Delta logo]()
$109
This Frontier deal was found by Cheapflights users on 3/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/261:25 pm
BOI
- ONT
1 stop11h 24m
Frontier
Deal found 3/12![Frontier logo]()
$111
This Delta deal was found by Cheapflights users on 3/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/225:40 am
BOI
- ONT
1 stop6h 33m
Delta
Deal found 3/16![Delta logo]()
$114
This Frontier deal was found by Cheapflights users on 3/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/51:22 pm
BOI
- ONT
1 stop11h 27m
Frontier
Deal found 3/12![Frontier logo]()
$117
This CheapOair deal was found by Cheapflights users on 3/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/246:08 pm
BOI
- ONT
1 stop6h 51m
Alaska Airlines
Deal found 3/12![Alaska Airlines logo]()
$119
Find flight deals from Boise to Ontario
Discover tips and strategies to find the most affordable flight options for your journey from Boise (BOI) to Ontario (ONT). 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 March 17, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $137 (Alaska Airlines) |
One-way from | $79 (Southwest) |
Popular in | March |
Cheapest in | August |
Average price | $488 |
Good round-trip deal | $197 or less |
Good one-way deal | $168 or less |
Cheapflights Fare Finder
Customize your flight search to find flights from Boise to Ontario 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 17, 2026.
Use the filters below to find and compare flights from Boise to Ontario that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
BoiseOntario
BOI - ONT
BOIONT
Boise Air Term. Gowen Fld
Sat 4/18
4:40 pm-5:45 pm
Nonstop2h 05m
Ontario
Tue 4/21
6:25 pm-9:26 pm
Nonstop2h 01m
$137
BoiseOntario
BOI - ONT
BOIONT
Boise Air Term. Gowen Fld
Tue 4/14
11:35 am-5:05 pm
1 stop6h 30m
Ontario
Tue 4/21
4:30 pm-11:20 pm
2 stops5h 50m
$162
BoiseOntario
BOI - ONT
BOIONT
Boise Air Term. Gowen Fld
Wed 4/15
7:05 am-10:25 am
1 stop4h 20m
Ontario
Sun 4/19
6:00 am-11:45 am
1 stop4h 45m
$177
BoiseOntario
BOI - ONT
BOIONT
Boise Air Term. Gowen Fld
Sun 4/5
5:20 am-9:20 am
1 stop5h 00m
Ontario
Sun 4/12
6:00 am-11:45 am
1 stop4h 45m
$197
BoiseOntario
BOI - ONT
BOIONT
Boise Air Term. Gowen Fld
Fri 4/3
4:05 pm-10:45 pm
1 stop7h 40m
Ontario
Sat 4/4
1:27 pm-9:15 pm
1 stop6h 48m
$262
BoiseOntario
BOI - ONT
BOIONT
Boise Air Term. Gowen Fld
Wed 5/20
11:35 am-5:05 pm
1 stop6h 30m
Ontario
Sun 5/24
4:20 pm-11:40 pm
2 stops6h 20m
$272
Quickest round-trip
BoiseOntario
BOI - ONT
BOIONT
Boise Air Term. Gowen Fld
Fri 5/29
4:14 pm-5:17 pm
Nonstop2h 03m
Ontario
Sun 5/31
7:48 pm-10:47 pm
Nonstop1h 59m
$277
BoiseOntario
BOI - ONT
BOIONT
Boise Air Term. Gowen Fld
Sat 4/11
6:05 am-11:05 am
2 stops6h 00m
Ontario
Sat 4/18
3:35 pm-11:15 pm
2 stops6h 40m
$282
Cheapest one-way
Quickest one-way
BoiseOntario
BOI - ONT
BOIONT
Boise Air Term. Gowen Fld
Fri 5/1
1:15 pm-2:19 pm
Nonstop2h 04m
$109
BoiseOntario
BOI - ONT
BOIONT
Boise Air Term. Gowen Fld
Fri 4/17
6:16 pm-11:44 pm
1 stop6h 28m
$124
Showing 1-10 of 17 resultsSorted by cheapest first
Compare providers for flights from Boise to Ontario
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 Boise to Ontario in March.
| 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 |
- Most accurate provider: When it comes to deals on Boise-Ontario flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Boise-Ontario flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Boise-Ontario flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on Boise-Ontario 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 Boise-Ontario 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 Boise to Ontario
Have a flexible travel schedule? Discover the best time to fly to Ontario from Boise with our price prediction graph.
BOI-ONT
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 Boise to Ontario
Prices
More
How far ahead should I book a flight from Boise to Ontario?
Use this chart to determine the optimal time to book a round-trip flight from Boise to Ontario. Price data was last updated on March 13, 2026.
The best time to book flights from Boise to Ontario is 36 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 Boise to Ontario?
Currently, August is the cheapest month in which you can book a flight from Boise to Ontario (average of $77). Flying from Boise to Ontario in December is currently the most expensive (average of $190). 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 BOI to ONT?
Find hourly flight availability from Boise to Ontario. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated March 17, 2026.
When flying from Boise to Ontario, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.
What’s the top layover airport for flights from Boise to Ontario?
Share of 1-stop round-trip flights from Boise to Ontario chosen by Cheapflights users in the past 12 months, using the same layover each way.
Portland (PDX) – chosen by Cheapflights users on 50% of 1-stop itineraries from Boise to Ontario on Cheapflights.
What’s the cheapest layover airport for flights from Boise to Ontario?
Average round-trip fare for 1-stop flights from Boise to Ontario, chosen by Cheapflights users in the past 12 months, with the same layover each way.
Portland (PDX) is the most affordable 1-stop option, with an average round-trip price of $252.
What’s the fastest layover option from Boise to Ontario?
Shortest average travel time for 1-stop one-way flights from Boise to Ontario, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by layover airport.
Flights via Sacramento (SMF) have the shortest average one-way travel time for 1-stop routes: 3h 45m.
Which airport typically offers the quickest layover for flights from Boise to Ontario?
Average layover duration for 1-stop one-way flights from Boise to Ontario, chosen by Cheapflights users in the last 12 months, grouped by stopover airport.
Flights via Sacramento (SMF) offer the fastest connection on this route, with an average layover time of 0h 43m.
Reviews of airlines servicing Ontario
Get insights into the airlines that provide service to Ontario. 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 Ontario. Reviews last updated March 17, 2026.
See what other customers who have flown with Southwest,Alaska Airlines, andDelta from Boise to Ontario have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Comfort
8.0
Overall
8.0
Food
7.0
Entertainment
7.5
Boarding
8.1
Crew
8.6
Reviews
1 / 20
8.0
ExcellentWalter,Aug 2025
OAK - SAN
Comfort
8.0
Overall
8.0
Food
7.0
Entertainment
7.5
Boarding
8.1
Crew
8.6
Reviews
1 / 20
8.0
ExcellentWalter,Aug 2025
OAK - SAN
Comfort
8.0
Overall
8.0
Food
7.0
Entertainment
7.5
Boarding
8.1
Crew
8.6
Reviews
1 / 20
8.0
ExcellentWalter,Aug 2025
OAK - SAN
Comfort
8.0
Overall
8.0
Food
7.0
Entertainment
7.5
Boarding
8.1
Crew
8.6
Reviews
1 / 20
8.0
ExcellentWalter,Aug 2025
OAK - SAN
Comfort
8.0
Overall
8.0
Food
7.0
Entertainment
7.5
Boarding
8.1
Crew
8.6
Reviews
1 / 20
8.0
ExcellentWalter,Aug 2025
OAK - SAN
Related info for your journey
Find useful and relevant information for your journey from Boise to Ontario. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
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Alternative routes for Boise to Ontario
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Complete your trip
Complete your trip to Ontario by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from Boise to Ontario by cabin class
Find flights from Boise to Ontario, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Other flights to Ontario
Explore flights to Ontario departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on March 17, 2026.
Boise and Ontario flights
Browse other Boise and Ontario flight options. Last updated on March 17, 2026.
Other flights from Boise
Browse through other flights departing from Boise. Flights are based on user searches made on Cheapflights and were last updated on March 17, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Top 4 airlines flying from Boise to Ontario
Discover the top 4 airlines that operate flights from Boise to Ontario. 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 17, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$117 | Average$277 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$136 | Average$320 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$209 | Average$364 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$211 | Average$316 | FlexibilityNo cancel fee | On-time69% |