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$69+ 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 1/7. Fares are subject to change and may not be available on all flights or dates of travel.
BOI — ONT
Jan 17 — Jan 241
Sat 1/17
Sat 1/24
1 adult, Economy
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1. Tell us where you want to go

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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 Monday or Wednesday and return on a Wednesday

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 December 18, 2025.

This United Airlines deal was found by Cheapflights users on 12/16. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/316:55 pmBOI - ONT
1 stop4h 38mUnited Airlines
Mon 1/55:05 amONT - BOI
1 stop7h 31mUnited Airlines
Deal found 12/16$391
This Southwest deal was found by Cheapflights users on 12/16. 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 12/235:25 pmBOI - ONT
1 stop7h 40mSouthwest
Mon 12/295:10 pmONT - BOI
1 stop5h 55mSouthwest
Deal found 12/16$437
This United Airlines deal was found by Cheapflights users on 12/17. 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 12/186:35 amBOI - ONT
1 stop4h 26mUnited Airlines
Sat 12/2010:42 amONT - BOI
1 stop4h 26mUnited Airlines
Deal found 12/17$443
This Alaska Airlines deal was found by Cheapflights users on 12/16. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/318:21 pmBOI - ONT
1 stop4h 38mAlaska Airlines
Mon 1/56:05 pmONT - BOI
2 stops15h 02mAlaska Airlines
Deal found 12/16$455
This Southwest deal was found by Cheapflights users on 12/15. 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.
Tue 12/235:25 pmBOI - ONT
1 stop7h 40mSouthwest
Sun 12/286:50 pmONT - BOI
1 stop3h 40mSouthwest
Deal found 12/15$460
This Delta deal was found by Cheapflights users on 12/16. 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.
Thu 12/184:45 pmBOI - ONT
1 stop7h 02mDelta
Tue 12/306:00 amONT - BOI
1 stop5h 02mDelta
Deal found 12/16$461
This Delta deal was found by Cheapflights users on 12/15. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/266:19 pmBOI - ONT
1 stop6h 35mDelta
Wed 12/316:00 amONT - BOI
1 stop5h 02mDelta
Deal found 12/15$464
This Delta deal was found by Cheapflights users on 12/16. 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.
Thu 12/184:45 pmBOI - ONT
1 stop7h 02mDelta
Mon 12/296:00 amONT - BOI
1 stop5h 02mDelta
Deal found 12/16$470
This Delta deal was found by Cheapflights users on 12/16. 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.
Sat 12/206:19 pmBOI - ONT
1 stop5h 09mDelta
Fri 12/265:10 pmONT - BOI
1 stop6h 09mDelta
Deal found 12/16$471
This Delta deal was found by Cheapflights users on 12/15. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/291:00 pmBOI - ONT
1 stop4h 12mDelta
Wed 12/316:00 amONT - BOI
1 stop5h 02mDelta
Deal found 12/15$487
This Delta deal was found by Cheapflights users on 12/15. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/201:00 pmBOI - ONT
1 stop4h 12mDelta
Thu 12/256:38 amONT - BOI
1 stop7h 11mDelta
Deal found 12/15$491

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 December 18, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$97
(Alaska Airlines)

One-way from

$69
(Alaska Airlines)

Popular in

October

Cheapest in

August

Average price

$377

Good round-trip deal

$117 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. 2% potential increase in price ($6 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($6 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals
Price to beat on a round-trip 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 December 18, 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

Sat 2/28

5:50 pm-6:57 pm

Nonstop2h 07m

Ontario

Wed 3/4

7:59 pm-10:58 pm

Nonstop1h 59m

$97

BoiseOntario

BOI - ONT

BOIONT

Boise Air Term. Gowen Fld

Wed 1/28

6:09 pm-7:16 pm

Nonstop2h 07m

Ontario

Mon 2/2

7:56 pm-10:57 pm

Nonstop2h 01m

$107

BoiseOntario

BOI - ONT

BOIONT

Boise Air Term. Gowen Fld

Mon 2/2

6:09 pm-7:16 pm

Nonstop2h 07m

Ontario

Sat 2/7

7:56 pm-10:57 pm

Nonstop2h 01m

$107

BoiseOntario

BOI - ONT

BOIONT

Boise Air Term. Gowen Fld

Sat 1/17

6:09 pm-7:16 pm

Nonstop2h 07m

Ontario

Sat 1/24

7:56 pm-10:57 pm

Nonstop2h 01m

$137

BoiseOntario

BOI - ONT

BOIONT

Boise Air Term. Gowen Fld

Thu 1/22

6:09 pm-7:16 pm

Nonstop2h 07m

Ontario

Mon 1/26

7:56 pm-10:57 pm

Nonstop2h 01m

$137

BoiseOntario

BOI - ONT

BOIONT

Boise Air Term. Gowen Fld

Thu 1/22

6:09 pm-7:16 pm

Nonstop2h 07m

Ontario

Thu 1/29

7:56 pm-10:57 pm

Nonstop2h 01m

$137

BoiseOntario

BOI - ONT

BOIONT

Boise Air Term. Gowen Fld

Sat 2/21

5:50 pm-6:57 pm

Nonstop2h 07m

Ontario

Sat 2/28

6:00 am-11:03 am

1 stop28h 03m

$138

BoiseOntario

BOI - ONT

BOIONT

Boise Air Term. Gowen Fld

Sat 2/21

6:20 pm-9:44 pm

1 stop4h 24m

Ontario

Sat 2/28

7:30 am-4:15 pm

1 stop7h 45m

$147

BoiseOntario

BOI - ONT

BOIONT

Boise Air Term. Gowen Fld

Mon 1/12

6:09 pm-7:16 pm

Nonstop2h 07m

Ontario

Sat 1/17

7:56 pm-10:57 pm

Nonstop2h 01m

$157

BoiseOntario

BOI - ONT

BOIONT

Boise Air Term. Gowen Fld

Wed 1/14

6:09 pm-7:16 pm

Nonstop2h 07m

Ontario

Wed 1/21

7:56 pm-10:57 pm

Nonstop2h 01m

$157

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/15

Showing 1-10 of 19 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 December.
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 December 12, 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 December is currently the most expensive (average of $186). 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 December 18, 2025.

Unlike at noon, when flights are generally more expensive, you can save up to 42% on flights from Boise to Ontario by exploring options for tickets in the afternoon.

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 Thursday afternoons when fares are most often at their lowest. Sunday 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 December 18, 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
11,476 reviews

Crew

8.5

Boarding

8.1

Food

7.1

Overall

8.0

Entertainment

7.0

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
11,476 reviews
Alaska Airlines
8.0
Very good
11,476 reviews

Crew

8.5

Boarding

8.1

Food

7.1

Overall

8.0

Entertainment

7.0

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
7.9
Good
4,249 reviews
Alaska Airlines
8.0
Very good
11,476 reviews

Crew

8.5

Boarding

8.1

Food

7.1

Overall

8.0

Entertainment

7.0

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
8,007 reviews
Alaska Airlines
8.0
Very good
11,476 reviews

Crew

8.5

Boarding

8.1

Food

7.1

Overall

8.0

Entertainment

7.0

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
9,091 reviews
Alaska Airlines
8.0
Very good
11,476 reviews

Crew

8.5

Boarding

8.1

Food

7.1

Overall

8.0

Entertainment

7.0

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 2h 07m. Alaska Airlines provides one of the quickest options available for as low as $97. Boise and Ontario are separated by a distance of 661 mi. All flights are typically nonstop.

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

    According to our current data, Delta ($136), Alaska Airlines ($137), and United Airlines ($211) 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 United Airlines ($98), Southwest ($108), and Alaska Airlines ($117).

  • What are the cheapest flights from Boise to Ontario?

    On average you can expect to pay $157 for a flight from Boise to Ontario. The cheapest flight overall is $107 while the most popular route, (Boise Air Term. Gowen Fld - Ontario) is currently priced at $137.

  • 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 December is currently the most expensive (average of $186). 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

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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 December 18, 2025.
AirlineCheapestAverageFlexibilityOn-time
Alaska AirlinesCheapest$137Average$283FlexibilityNo cancel feeOn-time75%
DeltaCheapest$158Average$260FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$211Average$316FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$218Average$365FlexibilityNo cancel feeOn-time63%

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