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$61+ 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 1/12. Fares are subject to change and may not be available on all flights or dates of travel.
BOI — ONT
Dec 3 — Dec 101
Wed 12/3
Wed 12/10
1 adult, Economy
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Cheap 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 November 3, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$136
(Cheapflightsfares)

One-way from

$61
(Frontier)

Popular in

October

Cheapest in

August

Average price

$340

Good round-trip deal

$237 or less
Provider with most accurate pricing for Boise Air Term. Gowen Fld-Ontario flight deals.
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Provider most trusted by Cheapflights users for Boise Air Term. Gowen Fld-Ontario flights.
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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. 4% potential increase in price ($16 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($8 potential savings vs. average RT price).
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Average for round-trip flights in November 2025
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Price to beat on a round-trip flight from Boise Air Term. Gowen Fld to Ontario.
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Find 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 November 3, 2025.

This Delta deal was found by Cheapflights users on 11/1. 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 12/35:58 pmBOI - ONT
1 stop7h 00mDelta
Tue 12/912:40 pmONT - BOI
1 stop5h 11mDelta
Deal found 11/1$147
This Delta deal was found by Cheapflights users on 11/3. 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.
Sat 12/611:44 amBOI - ONT
1 stop6h 24mDelta
Mon 12/812:40 pmONT - BOI
1 stop5h 11mDelta
Deal found 11/3$167
This Alaska Airlines deal was found by Cheapflights users on 11/2. 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.
Wed 12/104:20 pmBOI - ONT
1 stop4h 43mAlaska Airlines
Tue 12/166:00 amONT - BOI
1 stop8h 26mAlaska Airlines
Deal found 11/2$176
This Delta deal was found by Cheapflights users on 11/1. 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.
Sun 12/75:58 pmBOI - ONT
1 stop7h 00mDelta
Wed 12/106:00 amONT - BOI
1 stop5h 02mDelta
Deal found 11/1$177
This Delta deal was found by Cheapflights users on 11/1. 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.
Sun 12/78:45 amBOI - ONT
1 stop4h 49mDelta
Mon 12/812:40 pmONT - BOI
1 stop5h 11mDelta
Deal found 11/1$187
This Delta deal was found by Cheapflights users on 11/1. 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.
Fri 12/55:58 pmBOI - ONT
1 stop7h 00mDelta
Sat 12/136:40 amONT - BOI
1 stop5h 34mDelta
Deal found 11/1$188
This Delta deal was found by Cheapflights users on 11/1. 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.
Fri 12/55:58 pmBOI - ONT
1 stop7h 00mDelta
Fri 12/126:40 amONT - BOI
1 stop5h 34mDelta
Deal found 11/1$208
This Kiwi.com deal was found by Cheapflights users on 11/1. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/1612:28 pmBOI - ONT
2 stops25h 23mMultiple Airlines
Thu 11/203:31 pmONT - BOI
1 stop23h 21mMultiple Airlines
Deal found 11/1$214
This Alaska Airlines deal was found by Cheapflights users on 11/2. 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.
Fri 12/55:59 pmBOI - ONT
1 stop6h 30mAlaska Airlines
Tue 12/912:13 pmONT - BOI
1 stop6h 23mAlaska Airlines
Deal found 11/2$216
This Southwest deal was found by Cheapflights users on 11/1. 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 12/98:05 amBOI - ONT
1 stop4h 55mSouthwest
Sat 12/135:30 amONT - BOI
2 stops6h 25mSouthwest
Deal found 11/1$254
This United Airlines deal was found by Cheapflights users on 11/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/282:40 pmBOI - ONT
1 stop6h 01mUnited Airlines
Sat 12/66:41 pmONT - BOI
1 stop4h 03mUnited Airlines
Deal found 11/2$302

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 November 3, 2025.
Use the filters below to find and compare flights from Boise to Ontario that are best for you.

Fly from

Boise

Fly to

Ontario

Route

Depart

Return

Price

BoiseOntario

BOI - ONT

BOIONT

Boise Air Term. Gowen Fld

Tue 12/9

11:44 am-5:07 pm

1 stop6h 23m

Ontario

Sat 12/13

6:40 am-4:02 pm

1 stop8h 22m

$147

BoiseOntario

BOI - ONT

BOIONT

Boise Air Term. Gowen Fld

Sat 12/6

5:58 pm-9:55 pm

1 stop4h 57m

Ontario

Tue 12/9

6:40 am-1:14 pm

1 stop5h 34m

$147

BoiseOntario

BOI - ONT

BOIONT

Boise Air Term. Gowen Fld

Wed 12/3

5:58 pm-11:58 pm

1 stop7h 00m

Ontario

Sat 12/13

12:40 pm-8:20 pm

1 stop6h 40m

$147

BoiseOntario

BOI - ONT

BOIONT

Boise Air Term. Gowen Fld

Sat 12/6

5:58 pm-9:55 pm

1 stop4h 57m

Ontario

Sat 12/13

6:40 am-1:14 pm

1 stop5h 34m

$147

BoiseOntario

BOI - ONT

BOIONT

Boise Air Term. Gowen Fld

Sat 12/6

11:44 am-5:08 pm

1 stop6h 24m

Ontario

Mon 12/8

12:40 pm-6:51 pm

1 stop5h 11m

$167

BoiseOntario

BOI - ONT

BOIONT

Boise Air Term. Gowen Fld

Sat 12/6

5:58 pm-9:55 pm

1 stop4h 57m

Ontario

Thu 12/11

5:49 pm-12:04 am

1 stop5h 15m

$167

BoiseOntario

BOI - ONT

BOIONT

Boise Air Term. Gowen Fld

Wed 12/3

5:58 pm-11:58 pm

1 stop7h 00m

Ontario

Fri 12/12

6:40 am-1:14 pm

1 stop5h 34m

$167

BoiseOntario

BOI - ONT

BOIONT

Boise Air Term. Gowen Fld

Mon 12/8

5:58 pm-11:58 pm

1 stop7h 00m

Ontario

Sat 12/13

6:40 am-1:14 pm

1 stop5h 34m

$167

BoiseOntario

BOI - ONT

BOIONT

Boise Air Term. Gowen Fld

Tue 12/9

11:10 am-4:09 pm

1 stop5h 59m

Ontario

Wed 12/10

6:00 am-12:02 pm

1 stop5h 02m

$167

BoiseOntario

BOI - ONT

BOIONT

Boise Air Term. Gowen Fld

Mon 1/5

5:10 pm-10:29 pm

1 stop6h 19m

Ontario

Sat 1/10

6:00 am-12:04 pm

1 stop5h 04m

$167

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/1

Showing 1-10 of 20 results
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 November.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice Accuracy3 starsTrust Score*3 stars
PricelinePrice Accuracy1 starTrust Score*3 stars
Kiwi.comPrice 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 eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Boise-Ontario flight deals on Cheapflights vs. eDreams >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 eDreams the most. eDreams 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?

Use this chart to determine the optimal time to book a round-trip flight from Boise to Ontario. Price data was last updated on October 31, 2025.

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, March is the cheapest month in which you can book a flight from Boise to Ontario (average of $75). Flying from Boise to Ontario in January is currently the most expensive (average of $140). 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 November 3, 2025.

Unlike in the afternoon, when flights are generally more expensive, you can save up to 26% on flights from Boise to Ontario by exploring options for tickets in the evening.

What is the cheapest day to fly from Boise to Ontario?

Use this chart to determine the cheapest time to fly round-trip from Boise to Ontario. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their Boise to Ontario flight should consider departing on Tuesday afternoons when fares are most often at their lowest. Saturday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

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 November 3, 2025.
See what other customers who have flown with Alaska Airlines, Southwest, and Delta 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.
Alaska Airlines
8.0
Very good
11,235 reviews

Entertainment

7.0

Food

7.1

Crew

8.5

Overall

8.0

Boarding

8.1

Comfort

7.8

Reviews

1 / 20
6.0
Good

Hannah,Aug 2025

SFO - SAN

Ticket said TSA pre check, but then the TSA agent said that Alaska Airlines has not actually entered the pre check information for the ticket, so I had to use regular security. During boarding, I have a disability and need to board early. The Alaska Airlines employee announced disability boarding, but then immediately announced 2 other groups to board, so I still had to fight the crowds. On the plane, the stewardess was brusk and rude. Seats were very uncomfortable, especially on lower back.
Alaska Airlines
8.0
Very good
11,235 reviews
Alaska Airlines
8.0
Very good
11,235 reviews

Entertainment

7.0

Food

7.1

Crew

8.5

Overall

8.0

Boarding

8.1

Comfort

7.8

Reviews

1 / 20
6.0
Good

Hannah,Aug 2025

SFO - SAN

Ticket said TSA pre check, but then the TSA agent said that Alaska Airlines has not actually entered the pre check information for the ticket, so I had to use regular security. During boarding, I have a disability and need to board early. The Alaska Airlines employee announced disability boarding, but then immediately announced 2 other groups to board, so I still had to fight the crowds. On the plane, the stewardess was brusk and rude. Seats were very uncomfortable, especially on lower back.
Southwest
8.0
Very good
4,238 reviews
Alaska Airlines
8.0
Very good
11,235 reviews

Entertainment

7.0

Food

7.1

Crew

8.5

Overall

8.0

Boarding

8.1

Comfort

7.8

Reviews

1 / 20
6.0
Good

Hannah,Aug 2025

SFO - SAN

Ticket said TSA pre check, but then the TSA agent said that Alaska Airlines has not actually entered the pre check information for the ticket, so I had to use regular security. During boarding, I have a disability and need to board early. The Alaska Airlines employee announced disability boarding, but then immediately announced 2 other groups to board, so I still had to fight the crowds. On the plane, the stewardess was brusk and rude. Seats were very uncomfortable, especially on lower back.
Delta
7.9
Good
8,001 reviews
Alaska Airlines
8.0
Very good
11,235 reviews

Entertainment

7.0

Food

7.1

Crew

8.5

Overall

8.0

Boarding

8.1

Comfort

7.8

Reviews

1 / 20
6.0
Good

Hannah,Aug 2025

SFO - SAN

Ticket said TSA pre check, but then the TSA agent said that Alaska Airlines has not actually entered the pre check information for the ticket, so I had to use regular security. During boarding, I have a disability and need to board early. The Alaska Airlines employee announced disability boarding, but then immediately announced 2 other groups to board, so I still had to fight the crowds. On the plane, the stewardess was brusk and rude. Seats were very uncomfortable, especially on lower back.
United Airlines
7.4
Good
8,996 reviews
Alaska Airlines
8.0
Very good
11,235 reviews

Entertainment

7.0

Food

7.1

Crew

8.5

Overall

8.0

Boarding

8.1

Comfort

7.8

Reviews

1 / 20
6.0
Good

Hannah,Aug 2025

SFO - SAN

Ticket said TSA pre check, but then the TSA agent said that Alaska Airlines has not actually entered the pre check information for the ticket, so I had to use regular security. During boarding, I have a disability and need to board early. The Alaska Airlines employee announced disability boarding, but then immediately announced 2 other groups to board, so I still had to fight the crowds. On the plane, the stewardess was brusk and rude. Seats were very uncomfortable, especially on lower back.

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.

  • How long is the flight from Boise to Ontario?

    A quick flight from Boise to Ontario can take about 6h 23m. Delta provides one of the quickest options available for as low as $147. Boise and Ontario are separated by a distance of 661 mi.

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

    According to our current data, Delta ($156), United Airlines ($211), and Alaska Airlines ($217) offers the cheapest pricing from Boise to Ontario. Delta is 52% cheaper than the average price of flights available within the next 90 days to this destination.

  • What are the cheapest flights from Boise to Ontario?

    On average you can expect to pay $427 for a flight from Boise to Ontario. The cheapest flight overall is $177 while the most popular route, (Boise Air Term. Gowen Fld - Ontario) is currently priced at $136.

  • 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, March is the cheapest month in which you can book a flight from Boise to Ontario (average of $75). Flying from Boise to Ontario in January is currently the most expensive (average of $140). 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.

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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 November 3, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$156Average$259FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$211Average$347FlexibilityNo cancel feeOn-time69%
Alaska AirlinesCheapest$217Average$294FlexibilityNo cancel feeOn-time75%
SouthwestCheapest$218Average$364FlexibilityNo cancel feeOn-time63%

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