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$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 3/7. Fares are subject to change and may not be available on all flights or dates of travel.
BOI — ONT
Feb 21 — Feb 281
Sat 2/21
Sat 2/28
1 adult, Economy
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Find cheap flights from Boise to Ontario with Cheapflights

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 Wednesday or Friday and return on a Thursday

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 January 22, 2026.

This Alaska Airlines deal was found by Cheapflights users on 1/21. 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 2/215:50 pm
BOI
-
ONT
Nonstop2h 07m
Alaska Airlines
Wed 2/257:59 pm
ONT
-
BOI
Nonstop1h 59m
Alaska Airlines
Deal found 1/21$117
This Delta deal was found by Cheapflights users on 1/19. 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.
Tue 2/2412:59 pm
BOI
-
ONT
1 stop4h 03m
Delta
Sat 2/283:30 pm
ONT
-
BOI
1 stop5h 26m
Delta
Deal found 1/19$137
This Alaska Airlines deal was found by Cheapflights users on 1/20. 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.
Thu 4/164:40 pm
BOI
-
ONT
Nonstop2h 05m
Alaska Airlines
Sat 4/252:59 pm
ONT
-
BOI
Nonstop2h 00m
Alaska Airlines
Deal found 1/20$147
This CheapOair deal was found by Cheapflights users on 1/21. 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 4/104:40 pm
BOI
-
ONT
Nonstop2h 05m
Alaska Airlines
Tue 4/146:25 pm
ONT
-
BOI
Nonstop2h 01m
Alaska Airlines
Deal found 1/21$149
This Southwest deal was found by Cheapflights users on 1/21. 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 4/146:40 am
BOI
-
ONT
2 stops5h 55m
Southwest
Sat 4/183:35 pm
ONT
-
BOI
1 stop6h 15m
Southwest
Deal found 1/21$156
This Delta deal was found by Cheapflights users on 1/22. 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 3/1110:35 am
BOI
-
ONT
1 stop6h 53m
Delta
Wed 5/611:53 am
ONT
-
BOI
1 stop8h 32m
Delta
Deal found 1/22$167
This Southwest deal was found by Cheapflights users on 1/20. 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 2/2312:30 pm
BOI
-
ONT
1 stop6h 05m
Southwest
Wed 2/257:20 am
ONT
-
BOI
1 stop6h 35m
Southwest
Deal found 1/20$169
This Delta deal was found by Cheapflights users on 1/20. 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 2/236:35 pm
BOI
-
ONT
1 stop6h 14m
Delta
Wed 2/253:30 pm
ONT
-
BOI
1 stop5h 26m
Delta
Deal found 1/20$177
This CheapOair deal was found by Cheapflights users on 1/21. 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.
Mon 2/236:00 pm
BOI
-
ONT
1 stop6h 32m
Alaska Airlines
Wed 2/257:59 pm
ONT
-
BOI
Nonstop1h 59m
Alaska Airlines
Deal found 1/21$179
This Delta deal was found by Cheapflights users on 1/22. 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 2/195:15 pm
BOI
-
ONT
1 stop6h 22m
Delta
Sat 2/211:10 pm
ONT
-
BOI
1 stop3h 39m
Delta
Deal found 1/22$183
This Delta deal was found by Cheapflights users on 1/20. 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 3/75:15 pm
BOI
-
ONT
1 stop6h 22m
Delta
Mon 3/95:53 pm
ONT
-
BOI
1 stop4h 51m
Delta
Deal found 1/20$185

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 January 22, 2026.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$117
(Alaska Airlines)

One-way from

$79
(Alaska Airlines)

Popular in

October

Cheapest in

August

Average price

$254

Good round-trip deal

$197 or less

Good one-way deal

$188 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 ($7 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 January 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 January 22, 2026.
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 3/7

5:50 pm-6:57 pm

Nonstop2h 07m

Ontario

Sat 3/14

7:37 pm-10:36 pm

Nonstop1h 59m

$117

BoiseOntario

BOI - ONT

BOIONT

Boise Air Term. Gowen Fld

Sat 2/21

5:50 pm-6:57 pm

Nonstop2h 07m

Ontario

Wed 2/25

7:59 pm-10:58 pm

Nonstop1h 59m

$117

BoiseOntario

BOI - ONT

BOIONT

Boise Air Term. Gowen Fld

Tue 2/24

6:07 pm-7:14 pm

Nonstop2h 07m

Ontario

Sat 2/28

7:37 pm-10:36 pm

Nonstop1h 59m

$117

BoiseOntario

BOI - ONT

BOIONT

Boise Air Term. Gowen Fld

Tue 2/24

12:59 pm-4:02 pm

1 stop4h 03m

Ontario

Sat 2/28

3:30 pm-9:56 pm

1 stop5h 26m

$137

BoiseOntario

BOI - ONT

BOIONT

Boise Air Term. Gowen Fld

Mon 2/23

12:30 pm-5:35 pm

1 stop6h 05m

Ontario

Wed 2/25

7:20 am-2:55 pm

1 stop6h 35m

$169

BoiseOntario

BOI - ONT

BOIONT

Boise Air Term. Gowen Fld

Tue 3/10

10:35 am-5:12 pm

1 stop7h 37m

Ontario

Fri 3/13

11:59 am-6:42 pm

1 stop5h 43m

$177

BoiseOntario

BOI - ONT

BOIONT

Boise Air Term. Gowen Fld

Thu 5/7

1:15 pm-2:19 pm

Nonstop2h 04m

Ontario

Sun 5/10

2:59 pm-5:59 pm

Nonstop2h 00m

$177

BoiseOntario

BOI - ONT

BOIONT

Boise Air Term. Gowen Fld

Fri 4/10

4:40 pm-5:45 pm

Nonstop2h 05m

Ontario

Mon 4/13

6:25 pm-9:26 pm

Nonstop2h 01m

$177

BoiseOntario

BOI - ONT

BOIONT

Boise Air Term. Gowen Fld

Wed 3/11

10:35 am-4:28 pm

1 stop6h 53m

Ontario

Sat 3/14

6:00 am-1:05 pm

1 stop6h 05m

$183

BoiseOntario

BOI - ONT

BOIONT

Boise Air Term. Gowen Fld

Wed 5/6

1:15 pm-2:19 pm

Nonstop2h 04m

$79

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/19

Showing 1-10 of 21 results
1
2
3

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 January.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice 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 January 16, 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, 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 $174). 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 January 22, 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.

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 January 22, 2026.
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
11,775 reviews

Food

7.1

Boarding

8.1

Entertainment

7.0

Crew

8.5

Overall

8.0

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

Anonymous,Jan 2026

STS - LAX

Enjoyed staff assistance from ticking thru tsa , boarding and in the plane Couldn’t pick a seat except upgrading
Alaska Airlines
8.0
Very good
11,775 reviews
Alaska Airlines
8.0
Very good
11,775 reviews

Food

7.1

Boarding

8.1

Entertainment

7.0

Crew

8.5

Overall

8.0

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

Anonymous,Jan 2026

STS - LAX

Enjoyed staff assistance from ticking thru tsa , boarding and in the plane Couldn’t pick a seat except upgrading
Southwest
8.0
Very good
4,267 reviews
Alaska Airlines
8.0
Very good
11,775 reviews

Food

7.1

Boarding

8.1

Entertainment

7.0

Crew

8.5

Overall

8.0

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

Anonymous,Jan 2026

STS - LAX

Enjoyed staff assistance from ticking thru tsa , boarding and in the plane Couldn’t pick a seat except upgrading
Delta
7.9
Good
8,087 reviews
Alaska Airlines
8.0
Very good
11,775 reviews

Food

7.1

Boarding

8.1

Entertainment

7.0

Crew

8.5

Overall

8.0

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

Anonymous,Jan 2026

STS - LAX

Enjoyed staff assistance from ticking thru tsa , boarding and in the plane Couldn’t pick a seat except upgrading
United Airlines
7.4
Good
9,191 reviews
Alaska Airlines
8.0
Very good
11,775 reviews

Food

7.1

Boarding

8.1

Entertainment

7.0

Crew

8.5

Overall

8.0

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

Anonymous,Jan 2026

STS - LAX

Enjoyed staff assistance from ticking thru tsa , boarding and in the plane Couldn’t pick a seat except upgrading

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 4 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 03m.

  • 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 $117. 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 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 Delta ($79), United Airlines ($98), and Southwest ($108).

  • What are the cheapest flights from Boise to Ontario?

    On average you can expect to pay $248 for a flight from Boise to Ontario. The cheapest flight overall is $108 while the most popular route, (Boise Air Term. Gowen Fld - Ontario) is currently priced at $149.

  • 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 $174). 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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Alternative routes for Boise to Ontario

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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 January 22, 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$136Average$259FlexibilityNo cancel feeOn-timeN/A
Alaska AirlinesCheapest$137Average$283FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$211Average$298FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$218Average$363FlexibilityNo cancel feeOn-time63%

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