HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Ontario

$94+ 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 8/25. Fares are subject to change and may not be available on all flights or dates of travel.
BOI — ONT
Aug 27 — Sep 31
Thu 8/27
Thu 9/3
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

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 January or April, booked 47 days in advance, depart on a Tuesday or Saturday and return on a Tuesday

Cheap flight deals from Boise to Ontario

Cheapest flights from Boise to Ontario
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 July 28, 2026.

This Alaska Airlines deal was found by Cheapflights users on 7/26. Clicking the “Pick Dates” 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 9/293:02 pm
BOI
-
ONT
Nonstop2h 08m
Alaska Airlines
Wed 10/214:42 pm
ONT
-
BOI
Nonstop2h 01m
Alaska Airlines
Deal found 7/26$177
This Alaska Airlines deal was found by Cheapflights users on 7/25. Clicking the “Pick Dates” 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 8/253:02 pm
BOI
-
ONT
Nonstop2h 08m
Alaska Airlines
Tue 9/14:50 pm
ONT
-
BOI
Nonstop1h 55m
Alaska Airlines
Deal found 7/25$179
This Expedia deal was found by Cheapflights users on 7/27. Clicking the “Pick Dates” 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.
Thu 9/33:02 pm
BOI
-
ONT
Nonstop2h 08m
Alaska Airlines
Tue 9/84:50 pm
ONT
-
BOI
Nonstop1h 55m
Alaska Airlines
Deal found 7/27$187
This Flightnetwork deal was found by Cheapflights users on 7/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Flightnetwork is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/293:02 pm
BOI
-
ONT
Nonstop2h 08m
Alaska Airlines
Sun 8/304:50 pm
ONT
-
BOI
Nonstop1h 55m
Alaska Airlines
Deal found 7/27$190
This Trip.com deal was found by Cheapflights users on 7/25. Clicking the “Pick Dates” 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.
Tue 9/83:02 pm
BOI
-
ONT
Nonstop2h 08m
Alaska Airlines
Tue 9/1512:12 pm
ONT
-
BOI
1 stop7h 23m
Alaska Airlines
Deal found 7/25$192
This Kiwi.com deal was found by Cheapflights users on 7/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/2712:24 pm
BOI
-
ONT
1 stop12h 26m
Frontier
Mon 8/3110:49 am
ONT
-
BOI
1 stop24h 40m
Frontier
Deal found 7/27$205
This Priceline deal was found by Cheapflights users on 7/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/13:02 pm
BOI
-
ONT
Nonstop2h 08m
Alaska Airlines
Mon 10/56:02 am
ONT
-
BOI
1 stop5h 33m
Alaska Airlines
Deal found 7/25$207

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 July 28, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$177
(Alaska Airlines)

One-way from

$94
(Kiwi.com)

Popular in

March

Cheapest in

January

Average price

$342

Good round-trip deal

$342 or less

Good one-way deal

$180 or less
Provider with most accurate pricing for Boise Air Term. Gowen Fld-Ontario flight deals.
Search Deals
Provider most trusted by Cheapflights users for Boise Air Term. Gowen Fld-Ontario flights.
Search Deals
From Boise Air Term. Gowen Fld to Ontario
Search Deals
One-way flight from Boise Air Term. Gowen Fld to Ontario
Search Deals
Highest demand for flights based on searches. 5% potential increase in price ($20 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($10 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 2026
Search Deals
Price to beat on a round-trip flight from Boise Air Term. Gowen Fld to Ontario.
Search Deals
Price to beat on a one-way flight from Boise Air Term. Gowen Fld to Ontario.
Search Deals

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 July 28, 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

Price

Cheapest round-trip

BoiseOntario

BOI - ONT

BOIONT

Boise Air Term. Gowen Fld

Thu 9/3

9:05 am-11:50 am

1 stop3h 45m

Ontario

Tue 9/8

5:45 am-10:50 am

1 stop4h 05m

$202

BoiseOntario

BOI - ONT

BOIONT

Boise Air Term. Gowen Fld

Fri 9/18

3:02 pm-4:10 pm

Nonstop2h 08m

Ontario

Sun 9/20

6:02 am-12:35 pm

1 stop5h 33m

$207

BoiseOntario

BOI - ONT

BOIONT

Boise Air Term. Gowen Fld

Fri 10/9

7:45 pm-10:15 pm

1 stop3h 30m

Ontario

Tue 10/13

5:45 pm-10:25 pm

1 stop3h 40m

$207

BoiseOntario

BOI - ONT

BOIONT

Boise Air Term. Gowen Fld

Wed 10/21

11:32 am-4:23 pm

1 stop5h 51m

Ontario

Sun 10/25

6:00 am-10:42 am

1 stop3h 42m

$217

BoiseOntario

BOI - ONT

BOIONT

Boise Air Term. Gowen Fld

Mon 8/31

4:28 pm-8:24 pm

1 stop4h 56m

Ontario

Wed 9/2

4:50 pm-7:45 pm

Nonstop1h 55m

$227

BoiseOntario

BOI - ONT

BOIONT

Boise Air Term. Gowen Fld

Thu 10/1

6:44 pm-11:47 pm

1 stop6h 03m

Ontario

Sun 10/4

6:00 am-12:16 pm

1 stop5h 16m

$227
Quickest round-trip

BoiseOntario

BOI - ONT

BOIONT

Boise Air Term. Gowen Fld

Tue 10/13

2:51 pm-4:02 pm

Nonstop2h 11m

Ontario

Sat 10/17

4:42 pm-7:43 pm

Nonstop2h 01m

$227

BoiseOntario

BOI - ONT

BOIONT

Boise Air Term. Gowen Fld

Thu 10/1

3:02 pm-4:10 pm

Nonstop2h 08m

Ontario

Sun 10/4

7:25 am-1:10 pm

1 stop4h 45m

$247

BoiseOntario

BOI - ONT

BOIONT

Boise Air Term. Gowen Fld

Wed 8/19

7:05 am-12:40 pm

2 stops6h 35m

Ontario

Thu 8/27

5:45 pm-11:35 pm

1 stop4h 50m

$267
Cheapest one-way

BoiseOntario

BOI - ONT

BOIONT

Boise Air Term. Gowen Fld

Sat 8/29

11:35 am-2:15 pm

1 stop3h 40m

$99

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/28

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

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 July.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • 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.
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

How far ahead should I book a flight from Boise to Ontario?

The best time to book flights from Boise to Ontario is 46 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, January is the cheapest month in which you can book a flight from Boise to Ontario (average of $237). Flying from Boise to Ontario in March is currently the most expensive (average of $437). 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 July 28, 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.

How much does it cost to fly round-trip from Boise to Ontario?

Airfare is below average for this route at the moment.

Boise to Ontario flights typically cost between $287 and $320 in September.
The cheapest round-trip price found within the last 5 days was $177 on Alaska Airlines (Sep 1-Sep 12).

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 July 28, 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.
Southwest
8.0
Very good
4,228 reviews

Overall

8.0

Food

7.0

Crew

8.6

Boarding

8.1

Comfort

8.0

Entertainment

7.5

Reviews

1 / 20
10.0
Excellent

Walter,May 2026

LAS - BUR

Short but excellent flight. Everyone was friendly and professional it was a great flight!
Southwest
8.0
Very good
4,228 reviews
Southwest
8.0
Very good
4,228 reviews

Overall

8.0

Food

7.0

Crew

8.6

Boarding

8.1

Comfort

8.0

Entertainment

7.5

Reviews

1 / 20
10.0
Excellent

Walter,May 2026

LAS - BUR

Short but excellent flight. Everyone was friendly and professional it was a great flight!
Alaska Airlines
7.9
Good
12,727 reviews
Southwest
8.0
Very good
4,228 reviews

Overall

8.0

Food

7.0

Crew

8.6

Boarding

8.1

Comfort

8.0

Entertainment

7.5

Reviews

1 / 20
10.0
Excellent

Walter,May 2026

LAS - BUR

Short but excellent flight. Everyone was friendly and professional it was a great flight!
Delta
7.8
Good
8,486 reviews
Southwest
8.0
Very good
4,228 reviews

Overall

8.0

Food

7.0

Crew

8.6

Boarding

8.1

Comfort

8.0

Entertainment

7.5

Reviews

1 / 20
10.0
Excellent

Walter,May 2026

LAS - BUR

Short but excellent flight. Everyone was friendly and professional it was a great flight!
United Airlines
7.4
Good
10,050 reviews
Southwest
8.0
Very good
4,228 reviews

Overall

8.0

Food

7.0

Crew

8.6

Boarding

8.1

Comfort

8.0

Entertainment

7.5

Reviews

1 / 20
10.0
Excellent

Walter,May 2026

LAS - BUR

Short but excellent flight. Everyone was friendly and professional it was a great flight!
Frontier
5.6
Fair
2,749 reviews
Southwest
8.0
Very good
4,228 reviews

Overall

8.0

Food

7.0

Crew

8.6

Boarding

8.1

Comfort

8.0

Entertainment

7.5

Reviews

1 / 20
10.0
Excellent

Walter,May 2026

LAS - BUR

Short but excellent flight. Everyone was friendly and professional it was a great flight!

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.

  • What airports do I use to fly from Boise to Ontario?

    You will need to book a flight from Boise Air Term. Gowen Fld to Ontario if you want to fly from Boise to Ontario. At least 5 different airlines have flights from Air Term. Gowen Fld (BOI) to Ontario (ONT) on a regular basis. There is 1 flight to Ontario from the Boise airport per day. If you manage to book one that is nonstop, then you can expect the flight time from BOI to ONT to be around 2h 07m.

  • How long is the flight from Boise to Ontario?

    A quick flight from Boise to Ontario can take about 2h 08m. Southwest provides one of the quickest options available for as low as $207. Boise and Ontario are separated by a distance of 661 mi. This flight may include one or multiple stops.

  • What are the cheapest airlines flying from Boise to Ontario round-trip?

    According to our current data, Delta ($136), Alaska Airlines ($137), and Frontier ($170) offers the cheapest pricing from Boise to Ontario. Delta is 57% cheaper than the average price of flights available within the next 90 days to this destination.

  • What are the cheapest airlines to fly from Boise to Ontario one-way?

    The cheapest airlines for a one-way flight from Boise to Ontario are Delta ($78), Southwest ($93), and United Airlines ($98).

  • What are the cheapest flights from Boise to Ontario?

    On average you can expect to pay $379 for a flight from Boise to Ontario. The cheapest flight overall is $128 while the most popular route, (Boise Air Term. Gowen Fld - Ontario) is currently priced at $197.

  • Can I find deals for flights from Boise to Ontario that include hotel bookings?

    Yes. In addition to deals on Boise to Ontario flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Boise to Ontario?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Boise to Ontario.

  • Can I find deals for business class flights from Boise to Ontario?

    Yes. Cheapflights offers flight deals from Boise to Ontario by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Boise to Ontario?

    Currently, January is the cheapest month in which you can book a flight from Boise to Ontario (average of $237). Flying from Boise to Ontario in March is currently the most expensive (average of $437). 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.

See more FAQs

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.

Top 5 airlines flying from Boise to Ontario

Discover the top 5 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 July 28, 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$136Average$386FlexibilityNo cancel feeOn-timeN/A
Alaska AirlinesCheapest$137Average$280FlexibilityNo cancel feeOn-time75%
FrontierCheapest$170Average$243FlexibilityNo cancel feeOn-time62%
SouthwestCheapest$216Average$388FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$234Average$306FlexibilityNo cancel feeOn-time69%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.