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$84+ 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 10/27. Fares are subject to change and may not be available on all flights or dates of travel.
BOI — ONT
oct. 17 — oct. 241
ven. 10/17
ven. 10/24
1 adult, Economy
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Cheapflights Tip: The best prices from Boise Air Term. Gowen Fld to Ontario are usually found in August or October, booked 36 days in advance, depart on a Tuesday or Wednesday and return on a Wednesday

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 septembre 17, 2025.

Round-trip from

$167
(Delta)

One-way from

$84
(Delta)

Popular in

November

Cheapest in

August

Average price

$285
From Boise Air Term. Gowen Fld to Ontario
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One-way flight from Boise Air Term. Gowen Fld to Ontario
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Highest demand for flights based on searches. 2% potential increase in price ($7 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($6 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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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 septembre 17, 2025.

This Delta deal was found by Cheapflights users on 9/16. 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.
mar. 10/74:46 pmBOI - ONT
1 stop6h 55mDelta
mar. 10/145:50 pmONT - BOI
1 stop5h 18mDelta
Deal found 9/16$167
This Hawaiian Airlines deal was found by Cheapflights users on 9/15. 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 Hawaiian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 10/286:28 amBOI - ONT
1 stop5h 37mHawaiian Airlines
mer. 10/294:11 pmONT - BOI
1 stop5h 09mHawaiian Airlines
Deal found 9/15$216
This Southwest deal was found by Cheapflights users on 9/15. 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.
mer. 11/197:20 amBOI - ONT
1 stop4h 15mSouthwest
sam. 11/223:40 pmONT - BOI
1 stop6h 20mSouthwest
Deal found 9/15$217
This Southwest deal was found by Cheapflights users on 9/16. 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.
mar. 10/74:15 pmBOI - ONT
2 stops6h 50mSouthwest
mar. 10/143:50 pmONT - BOI
1 stop5h 20mSouthwest
Deal found 9/16$222
This Hawaiian Airlines deal was found by Cheapflights users on 9/15. 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 Hawaiian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mer. 10/86:30 amBOI - ONT
1 stop7h 07mHawaiian Airlines
sam. 10/115:45 pmONT - BOI
1 stop5h 12mHawaiian Airlines
Deal found 9/15$226
This Southwest deal was found by Cheapflights users on 9/15. 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.
mer. 12/245:50 pmBOI - ONT
1 stop3h 55mSouthwest
dim. 12/286:45 pmONT - BOI
1 stop3h 45mSouthwest
Deal found 9/15$237
This American Airlines deal was found by Cheapflights users on 9/16. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 11/106:37 amBOI - ONT
1 stop10h 24mAmerican Airlines
jeu. 11/1312:55 pmONT - BOI
1 stop9h 42mAmerican Airlines
Deal found 9/16$243
This Alaska Airlines deal was found by Cheapflights users on 9/15. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
ven. 10/105:38 pmBOI - ONT
1 stop7h 25mAlaska Airlines
mar. 10/145:45 pmONT - BOI
1 stop5h 12mAlaska Airlines
Deal found 9/15$246
This Alaska Airlines deal was found by Cheapflights users on 9/17. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
ven. 10/175:38 pmBOI - ONT
1 stop7h 25mAlaska Airlines
lun. 10/205:45 pmONT - BOI
1 stop5h 12mAlaska Airlines
Deal found 9/17$256
This Southwest deal was found by Cheapflights users on 9/15. 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.
jeu. 10/1611:35 amBOI - ONT
1 stop8h 45mSouthwest
lun. 10/205:55 pmONT - BOI
1 stop5h 45mSouthwest
Deal found 9/15$262
This Kiwi.com deal was found by Cheapflights users on 9/14. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
ven. 9/2612:22 pmBOI - ONT
2 stops25h 21mMultiple Airlines
lun. 9/296:00 amONT - BOI
1 stop13h 31mMultiple Airlines
Deal found 9/14$263

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 septembre 17, 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

mer. 11/19

7:20 am-10:35 am

1 stop4h 15m

Ontario

sam. 11/22

3:40 pm-11:00 pm

1 stop6h 20m

$217

BoiseOntario

BOI - ONT

BOIONT

Boise Air Term. Gowen Fld

mar. 10/7

4:15 pm-10:05 pm

2 stops6h 50m

Ontario

mar. 10/14

3:50 pm-10:10 pm

1 stop5h 20m

$222

BoiseOntario

BOI - ONT

BOIONT

Boise Air Term. Gowen Fld

lun. 1/19

1:15 pm-6:17 pm

1 stop6h 02m

Ontario

mer. 2/4

6:00 am-12:10 pm

1 stop5h 10m

$236

BoiseOntario

BOI - ONT

BOIONT

Boise Air Term. Gowen Fld

dim. 2/15

4:30 pm-5:42 pm

Nonstop2h 12m

Ontario

sam. 2/21

6:22 pm-9:39 pm

Nonstop2h 17m

$247

BoiseOntario

BOI - ONT

BOIONT

Boise Air Term. Gowen Fld

mar. 2/17

4:30 pm-5:42 pm

Nonstop2h 12m

Ontario

sam. 2/21

6:22 pm-9:39 pm

Nonstop2h 17m

$247

BoiseOntario

BOI - ONT

BOIONT

Boise Air Term. Gowen Fld

lun. 2/16

4:30 pm-5:42 pm

Nonstop2h 12m

Ontario

sam. 2/21

6:22 pm-9:39 pm

Nonstop2h 17m

$247

BoiseOntario

BOI - ONT

BOIONT

Boise Air Term. Gowen Fld

mer. 12/3

2:30 pm-8:00 pm

1 stop6h 30m

Ontario

mer. 12/17

2:05 pm-10:25 pm

2 stops7h 20m

$262

BoiseOntario

BOI - ONT

BOIONT

Boise Air Term. Gowen Fld

dim. 2/15

5:45 pm-10:52 pm

1 stop6h 07m

Ontario

sam. 2/21

6:00 am-12:18 pm

1 stop5h 18m

$267

BoiseOntario

BOI - ONT

BOIONT

Boise Air Term. Gowen Fld

sam. 11/29

1:26 pm-11:55 pm

1 stop11h 29m

Ontario

sam. 12/6

6:00 am-10:56 pm

1 stop15h 56m

$282

BoiseOntario

BOI - ONT

BOIONT

Boise Air Term. Gowen Fld

sam. 11/15

2:20 pm-8:53 pm

1 stop7h 33m

Ontario

lun. 11/24

4:48 pm-11:39 pm

1 stop5h 51m

$296

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/15

Showing 1-10 of 23 results
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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 September 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, August is the cheapest month in which you can book a flight from Boise to Ontario (average of $246). Flying from Boise to Ontario in March is currently the most expensive (average of $327). 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 septembre 17, 2025.

Unlike at noon, when flights are generally more expensive, you can save up to 17% 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 Tuesday evenings when fares are most often at their lowest. Monday at noon 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 septembre 17, 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
10,000 reviews

Comfort

7.8

Boarding

8.1

Food

7.1

Crew

8.5

Entertainment

7.1

Overall

8.0

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
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Boarding

8.1

Food

7.1

Crew

8.5

Entertainment

7.1

Overall

8.0

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
4,242 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Boarding

8.1

Food

7.1

Crew

8.5

Entertainment

7.1

Overall

8.0

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
8.0
Very good
7,961 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Boarding

8.1

Food

7.1

Crew

8.5

Entertainment

7.1

Overall

8.0

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
8,926 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Boarding

8.1

Food

7.1

Crew

8.5

Entertainment

7.1

Overall

8.0

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 4h 15m. Southwest provides one of the quickest options available for as low as $217. 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 ($156), Alaska Airlines ($214), and Southwest ($225) offers the cheapest pricing from Boise to Ontario. Delta is 51% cheaper than the average price of flights available within the next 90 days to this destination.

  • 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, August is the cheapest month in which you can book a flight from Boise to Ontario (average of $246). Flying from Boise to Ontario in March is currently the most expensive (average of $327). 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 septembre 17, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$156Average$250FlexibilityNo cancel feeOn-timeN/A
Alaska AirlinesCheapest$214Average$308FlexibilityNo cancel feeOn-time75%
SouthwestCheapest$225Average$363FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$232Average$353FlexibilityNo cancel feeOn-time69%

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