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$88+ 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 7/12. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — BOI
Jul 5 — Jul 121
Sat 7/5
Sat 7/12
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 30, 2025.

Round-trip from

$166
(Priceline)

One-way from

$88
(Priceline)

Popular in

December

Cheapest in

January

Average price

$376
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, 2% potential price rise
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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 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 30, 2025.

This Priceline deal was found by Cheapflights users on 6/29. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/312:59 amONT - BOI
1 stop9h 41mFrontier
Sun 9/712:25 pmBOI - ONT
1 stop8h 29mFrontier
Deal found 6/29$166
This American Airlines deal was found by Cheapflights users on 6/29. 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.
Wed 8/66:17 amONT - BOI
1 stop9h 28mAmerican Airlines
Mon 8/115:15 pmBOI - ONT
1 stop19h 17mAmerican Airlines
Deal found 6/29$233
This Alaska Airlines deal was found by Cheapflights users on 6/30. 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.
Mon 8/42:22 pmONT - BOI
1 stop7h 24mAlaska Airlines
Thu 8/75:43 pmBOI - ONT
1 stop7h 32mAlaska Airlines
Deal found 6/30$236
This Delta deal was found by Cheapflights users on 6/29. 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 8/35:09 pmONT - BOI
1 stop6h 00mDelta
Tue 8/512:50 pmBOI - ONT
1 stop4h 39mDelta
Deal found 6/29$244
This Southwest deal was found by Cheapflights users on 6/28. 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 8/261:55 pmONT - BOI
2 stops7h 30mSouthwest
Sat 8/3010:30 amBOI - ONT
1 stop6h 35mSouthwest
Deal found 6/28$261
This Orbitz deal was found by Cheapflights users on 6/29. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/212:59 amONT - BOI
1 stop9h 47mMultiple Airlines
Tue 8/59:53 amBOI - ONT
1 stop5h 53mMultiple Airlines
Deal found 6/29$266
This Hawaiian Airlines deal was found by Cheapflights users on 6/29. 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.
Sat 8/26:00 amONT - BOI
1 stop8h 04mHawaiian Airlines
Mon 8/47:12 pmBOI - ONT
1 stop6h 03mHawaiian Airlines
Deal found 6/29$267

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 30, 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

Wed 9/3

12:59 am-11:40 am

1 stop9h 41m

Boise Air Term. Gowen Fld

Sun 9/7

12:25 pm-7:54 pm

1 stop8h 29m

$166

OntarioBoise

ONT - BOI

ONTBOI

Ontario

Wed 8/6

6:17 am-4:45 pm

1 stop9h 28m

Boise Air Term. Gowen Fld

Mon 8/11

5:15 pm-11:32 am

1 stop19h 17m

$233

OntarioBoise

ONT - BOI

ONTBOI

Ontario

Mon 8/4

2:22 pm-10:46 pm

1 stop7h 24m

Boise Air Term. Gowen Fld

Thu 8/7

5:43 pm-12:15 am

1 stop7h 32m

$236

OntarioBoise

ONT - BOI

ONTBOI

Ontario

Sun 8/3

5:09 pm-12:09 am

1 stop6h 00m

Boise Air Term. Gowen Fld

Tue 8/5

12:50 pm-4:29 pm

1 stop4h 39m

$244

OntarioBoise

ONT - BOI

ONTBOI

Ontario

Tue 8/26

1:55 pm-10:25 pm

2 stops7h 30m

Boise Air Term. Gowen Fld

Sat 8/30

10:30 am-4:05 pm

1 stop6h 35m

$261

OntarioBoise

ONT - BOI

ONTBOI

Ontario

Sat 8/2

12:59 am-11:46 am

1 stop9h 47m

Boise Air Term. Gowen Fld

Tue 8/5

9:53 am-2:46 pm

1 stop5h 53m

$266

OntarioBoise

ONT - BOI

ONTBOI

Ontario

Sat 8/2

6:00 am-3:04 pm

1 stop8h 04m

Boise Air Term. Gowen Fld

Mon 8/4

7:12 pm-12:15 am

1 stop6h 03m

$267

OntarioBoise

ONT - BOI

ONTBOI

Ontario

Sat 7/12

12:59 am-11:46 am

1 stop9h 47m

$88

OntarioBoise

ONT - BOI

ONTBOI

Ontario

Sun 8/31

6:00 am-3:00 pm

1 stop8h 00m

$99

OntarioBoise

ONT - BOI

ONTBOI

Ontario

Thu 8/14

6:00 am-6:26 pm

1 stop11h 26m

$108

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/28

Showing 1-10 of 14 results
1
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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 27, 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 $398). 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 30, 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.

How much does it cost to fly round-trip from Ontario to Boise?

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 30, 2025.
Get a feel of what it's like to fly with Alaska Airlines, Southwest, and Delta from Ontario to Boise by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
10,000 reviews

Crew

8.5

Boarding

8.1

Comfort

7.8

Overall

8.0

Entertainment

7.1

Food

7.1

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

Crew

8.5

Boarding

8.1

Comfort

7.8

Overall

8.0

Entertainment

7.1

Food

7.1

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
4,278 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Crew

8.5

Boarding

8.1

Comfort

7.8

Overall

8.0

Entertainment

7.1

Food

7.1

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
7,973 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Crew

8.5

Boarding

8.1

Comfort

7.8

Overall

8.0

Entertainment

7.1

Food

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Hawaiian Airlines
7.8
Good
2,529 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Crew

8.5

Boarding

8.1

Comfort

7.8

Overall

8.0

Entertainment

7.1

Food

7.1

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
8,852 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Crew

8.5

Boarding

8.1

Comfort

7.8

Overall

8.0

Entertainment

7.1

Food

7.1

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 $166, Frontier will fly you from Ontario to Boise and back. In addition to Frontier, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from American Airlines and Alaska Airlines - these airlines can fly you to your destination from $233 and $236, respectively. Users have found that Frontier is 48% cheaper than the other options available to this destination.

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

    $88 is the cheapest one-way deal found within the past few days, from Frontier. You may also be able to find cheap deals on Alaska Airlines and Hawaiian Airlines, with prices starting from $99 and $118, 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 $398). 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 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
Alaska AirlinesCheapest$177Average$285FlexibilityNo cancel feeOn-time75%
DeltaCheapest$183Average$288FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$218Average$516FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$233Average$365FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$240Average$346FlexibilityNo cancel feeOn-time63%

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