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$99+ Cheap flights from Ontario to Boise (ONT - BOI)

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 8/31. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — BOI
Jun 17 — Jun 241
Tue 6/17
Tue 6/24
1 adult, Economy
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Cheapflights Tip: The best prices from Ontario to Boise Air Term. Gowen Fld are usually found in January or October, booked 38 days in advance, depart on a Thursday or Saturday and return on a Tuesday

Cheap flight deals from Ontario to Boise

Discover tips and strategies to find the most affordable flight options for your journey from Ontario (ONT) to Boise (BOI). 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 June 12, 2025.

Round-trip from

$227
(Alaska Airlines)

One-way from

$99
(Alaska Airlines)

Popular in

December

Cheapest in

January

Average price

$358
From Ontario to Boise Air Term. Gowen Fld
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One-way flight from Ontario to Boise Air Term. Gowen Fld
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High demand for flights, 0% potential price rise
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Cheapest flight prices on average. 2% potential price decrease ($9 potential savings vs. average RT price).
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Average for round-trip flights in June 2025
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Find flight deals from Ontario to Boise

Cheapest flights from Ontario to Boise
Explore the most affordable flight options available from Ontario to Boise. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 12, 2025.

This Alaska Airlines deal was found by Cheapflights users on 6/10. 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 9/186:00 amONT - BOI
1 stop8h 00mAlaska Airlines
Thu 9/185:45 pmBOI - ONT
1 stop7h 14mAlaska Airlines
Deal found 6/10$227
This United Airlines deal was found by Cheapflights users on 6/11. 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.
Tue 8/261:15 pmONT - BOI
1 stop8h 06mUnited Airlines
Wed 8/277:45 amBOI - ONT
1 stop5h 28mUnited Airlines
Deal found 6/11$228
This Delta deal was found by Cheapflights users on 6/10. 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 7/53:05 pmONT - BOI
1 stop7h 54mDelta
Wed 7/95:45 amBOI - ONT
1 stop4h 02mDelta
Deal found 6/10$229
This Southwest deal was found by Cheapflights users on 6/11. 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 9/231:55 pmONT - BOI
2 stops7h 30mSouthwest
Mon 9/295:45 amBOI - ONT
1 stop3h 30mSouthwest
Deal found 6/11$234
This American Airlines deal was found by Cheapflights users on 6/10. 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.
Fri 9/56:10 amONT - BOI
1 stop6h 03mAmerican Airlines
Mon 9/85:22 pmBOI - ONT
1 stop19h 34mAmerican Airlines
Deal found 6/10$249
This CheapOair deal was found by Cheapflights users on 6/9. 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.
Wed 7/1612:59 amONT - BOI
1 stop9h 47mFrontier
Sun 7/2012:36 pmBOI - ONT
1 stop21h 37mFrontier
Deal found 6/9$270
This Hawaiian Airlines deal was found by Cheapflights users on 6/10. 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.
Fri 7/410:03 amONT - BOI
1 stop5h 45mHawaiian Airlines
Tue 7/87:12 pmBOI - ONT
1 stop6h 01mHawaiian Airlines
Deal found 6/10$278
This Travelocity deal was found by Cheapflights users on 6/10. 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/2112:59 amONT - BOI
1 stop9h 33mMultiple Airlines
Mon 8/255:45 pmBOI - ONT
1 stop7h 14mMultiple Airlines
Deal found 6/10$345

Cheapflights Fare Finder

Customize your flight search to find flights from Ontario to Boise 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 June 12, 2025.
Use the filters below to find and compare flights from Ontario to Boise that are best for you.

Fly from

Ontario

Fly to

Boise

Route

Depart

Return

Price

OntarioBoise

ONT - BOI

ONTBOI

Ontario

Tue 8/26

1:15 pm-10:21 pm

1 stop8h 06m

Boise Air Term. Gowen Fld

Wed 8/27

7:45 am-12:13 pm

1 stop5h 28m

$228

OntarioBoise

ONT - BOI

ONTBOI

Ontario

Sat 7/5

3:05 pm-11:59 pm

1 stop7h 54m

Boise Air Term. Gowen Fld

Wed 7/9

5:45 am-8:47 am

1 stop4h 02m

$229

OntarioBoise

ONT - BOI

ONTBOI

Ontario

Wed 8/13

6:00 am-12:20 pm

1 stop5h 20m

Boise Air Term. Gowen Fld

Mon 8/18

8:25 pm-11:59 pm

1 stop4h 34m

$232

OntarioBoise

ONT - BOI

ONTBOI

Ontario

Tue 8/26

2:10 pm-10:10 pm

2 stops7h 00m

Boise Air Term. Gowen Fld

Wed 8/27

4:05 pm-10:05 pm

1 stop7h 00m

$238

OntarioBoise

ONT - BOI

ONTBOI

Ontario

Fri 9/5

6:10 am-1:13 pm

1 stop6h 03m

Boise Air Term. Gowen Fld

Mon 9/8

5:22 pm-11:56 am

1 stop19h 34m

$249

OntarioBoise

ONT - BOI

ONTBOI

Ontario

Wed 7/16

12:59 am-11:46 am

1 stop9h 47m

Boise Air Term. Gowen Fld

Sun 7/20

12:36 pm-9:13 am

1 stop21h 37m

$270

OntarioBoise

ONT - BOI

ONTBOI

Ontario

Fri 7/4

10:03 am-4:48 pm

1 stop5h 45m

Boise Air Term. Gowen Fld

Tue 7/8

7:12 pm-12:13 am

1 stop6h 01m

$278

OntarioBoise

ONT - BOI

ONTBOI

Ontario

Thu 8/21

12:59 am-11:32 am

1 stop9h 33m

Boise Air Term. Gowen Fld

Mon 8/25

5:45 pm-11:59 pm

1 stop7h 14m

$345

OntarioBoise

ONT - BOI

ONTBOI

Ontario

Sun 8/31

6:00 am-3:00 pm

1 stop8h 00m

$99

OntarioBoise

ONT - BOI

ONTBOI

Ontario

Tue 7/1

3:05 pm-11:59 pm

1 stop7h 54m

$100

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/9

Showing 1-10 of 15 results
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Best time to book a flight from Ontario to Boise

Have a flexible travel schedule? Discover the best time to fly to Boise from Ontario 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 Ontario to Boise

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

Use this chart to determine the optimal time to book a round-trip flight from Ontario to Boise. Price data was last updated on June 9, 2025.

The best time to book flights from Ontario to Boise is 38 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 Ontario to Boise?

Currently, October is the cheapest month in which you can book a flight from Ontario to Boise (average of $314). Flying from Ontario to Boise in June is currently the most expensive (average of $395). 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 ONT to BOI?

Find hourly flight availability from Ontario to Boise. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated June 12, 2025.

It’s typically best to fly out from Ontario to Boise in the evening. Doing so could potentially save you 19% on the flight price compared to flying at noon, which is usually more expensive.

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

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

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

Rainfall in Boise by month

Plan your trip to Boise by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Boise ranges from 0.2 - 1.6 inches per month. December is typically the wettest month, when rainfall can reach 1.6 in. August is typically the driest time to visit Boise when rainfall is around 0.2 in.

Temperature in Boise by month

Plan your trip to Boise by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Boise, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 75.2 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 30.2 F).

Reviews of airlines servicing Boise

Get insights into the airlines that provide service to Boise. 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 Boise. Reviews last updated June 12, 2025.
Read through reviews of airlines operating flights from Ontario to Boise, such as Alaska Airlines, Southwest and Delta. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.1

Boarding

8.1

Comfort

7.8

Food

7.1

Overall

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.1

Boarding

8.1

Comfort

7.8

Food

7.1

Overall

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Southwest
8.0
Very good
4,287 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.1

Boarding

8.1

Comfort

7.8

Food

7.1

Overall

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Delta
8.0
Very good
7,950 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.1

Boarding

8.1

Comfort

7.8

Food

7.1

Overall

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Hawaiian Airlines
7.9
Good
2,494 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.1

Boarding

8.1

Comfort

7.8

Food

7.1

Overall

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
United Airlines
7.4
Good
8,790 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.1

Boarding

8.1

Comfort

7.8

Food

7.1

Overall

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

Related info for your journey

Find useful and relevant information for your journey from Ontario to Boise. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

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

    Currently priced at $227, Alaska Airlines will fly you from Ontario to Boise and back. In addition to Alaska Airlines, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from United Airlines and Delta - these airlines can fly you to your destination from $228 and $229, respectively. Users have found that Alaska Airlines is 29% cheaper than the other options available to this destination.

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

    $99 is the cheapest one-way deal found within the past few days, from Alaska Airlines. You may also be able to find cheap deals on Delta and Frontier, with prices starting from $100 and $112, respectively.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Ontario to Boise 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 Ontario to Boise?

    Currently, October is the cheapest month in which you can book a flight from Ontario to Boise (average of $314). Flying from Ontario to Boise in June is currently the most expensive (average of $395). 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

Traveling to a place near Ontario?

Book flights to Ontario if you plan to visit one of these locations
Nampa
Meridian
Ontario
McCall
Caldwell

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Top 5 airlines flying from Ontario to Boise

Discover the top 5 airlines that operate flights from Ontario to Boise. 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 June 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
Alaska AirlinesCheapest$178Average$286FlexibilityNo cancel feeOn-time75%
DeltaCheapest$181Average$285FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$218Average$516FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$233Average$372FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$240Average$345FlexibilityNo cancel feeOn-time63%

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