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$81+ Cheap flights from Ontario (ONT) to Idaho

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 1/8. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — BOI
Dec 25 — Jan 11
Thu 12/25
Thu 1/1
1 adult, Economy
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Cheap flight deals from Ontario to Idaho

Keep the following information in mind while searching for Ontario to Idaho flight deals. Data was last updated November 25, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$136
(Cheapflightsfares)

One-way from

$81
(Frontier)

Popular in

December

Cheapest in

April

Average price

$332

Good round-trip deal

$171 or less
Provider with most accurate pricing for Los Angeles-Boise Air Term. Gowen Fld flight deals.
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Provider most trusted by Cheapflights users for Los Angeles-Boise Air Term. Gowen Fld flights.
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From Ontario to Idaho
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One-way flight from Ontario to Idaho
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Highest demand for flights based on searches. 9% potential increase in price ($32 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($7 potential savings vs. average RT price).
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Average for round-trip flights in November 2025
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Price to beat on a round-trip flight from Ontario to Idaho.
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Find flight deals from Ontario to Idaho

Cheapest flights from Ontario to Idaho
Explore the most affordable flight options available from Ontario to Idaho. Find the lowest fares from popular airlines and budget airlines, with prices last updated on November 25, 2025.

This Kiwi.com deal was found by Cheapflights users on 11/24. 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.
Sat 12/136:15 amONT - IDA
1 stop4h 44mMultiple Airlines
Mon 12/158:16 pmIDA - ONT
1 stop26h 01mMultiple Airlines
Deal found 11/24$196
This Delta deal was found by Cheapflights users on 11/22. 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.
Tue 12/161:29 pmONT - JAC
1 stop7h 00mDelta
Sun 12/215:40 pmJAC - ONT
1 stop7h 14mDelta
Deal found 11/22$229
This Trip.com deal was found by Cheapflights users on 11/23. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/412:04 pmONT - BOI
1 stop22h 45mFrontier
Fri 12/1212:44 pmBOI - ONT
1 stop26h 41mFrontier
Deal found 11/23$245
This Alaska Airlines deal was found by Cheapflights users on 11/25. 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.
Tue 12/166:00 amONT - BOI
1 stop5h 45mAlaska Airlines
Thu 12/181:00 pmBOI - ONT
1 stop6h 25mAlaska Airlines
Deal found 11/25$246
This Kiwi.com deal was found by Cheapflights users on 11/25. 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.
Sat 12/133:20 pmONT - BOI
1 stop19h 29mMultiple Airlines
Mon 12/1510:41 pmBOI - ONT
1 stop23h 36mMultiple Airlines
Deal found 11/25$249
This Delta deal was found by Cheapflights users on 11/25. 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 12/84:49 pmONT - JAC
1 stop3h 40mDelta
Mon 12/155:50 pmJAC - ONT
1 stop7h 08mDelta
Deal found 11/25$249
This Kiwi.com deal was found by Cheapflights users on 11/23. 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.
Fri 12/126:15 amONT - IDA
1 stop6h 01mMultiple Airlines
Mon 12/158:16 pmIDA - ONT
1 stop26h 01mMultiple Airlines
Deal found 11/23$254
This United Airlines deal was found by Cheapflights users on 11/23. 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 12/255:05 amONT - GEG
1 stop7h 40mUnited Airlines
Tue 1/65:00 amGEG - ONT
1 stop7h 47mUnited Airlines
Deal found 11/23$255
This Delta deal was found by Cheapflights users on 11/22. 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.
Mon 12/154:49 pmONT - BOI
1 stop6h 53mDelta
Tue 12/165:20 amBOI - ONT
1 stop6h 53mDelta
Deal found 11/22$258
This Kiwi.com deal was found by Cheapflights users on 11/24. 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.
Mon 12/226:00 amONT - BOI
1 stop8h 44mMultiple Airlines
Mon 12/299:46 pmBOI - ONT
1 stop20h 36mMultiple Airlines
Deal found 11/24$263
This United Airlines deal was found by Cheapflights users on 11/25. 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 12/105:05 amONT - SUN
1 stop7h 32mUnited Airlines
Sun 12/142:21 pmSUN - ONT
1 stop4h 16mUnited Airlines
Deal found 11/25$269
This Kiwi.com deal was found by Cheapflights users on 11/22. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/126:15 amONT - BOI
1 stop8h 29mMultiple Airlines
Sun 12/1412:44 pmBOI - ONT
2 stops35h 47mMultiple Airlines
Deal found 11/22$273

Cheapflights Fare Finder

 
Customize your flight search to find flights from Ontario to Idaho 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 November 25, 2025.
Use the filters below to find and compare flights from Ontario to Idaho that are best for you.

Fly from

Ontario

Fly to

Idaho

Route

Depart

Return

Price

OntarioBoise

ONT - BOI

ONTBOI

Ontario

Tue 1/6

8:30 am-2:20 pm

1 stop4h 50m

Boise Air Term. Gowen Fld

Wed 1/7

7:45 am-2:45 pm

1 stop8h 00m

$151

OntarioBoise

ONT - BOI

ONTBOI

Ontario

Fri 1/9

7:56 pm-10:57 pm

Nonstop2h 01m

Boise Air Term. Gowen Fld

Sat 1/10

6:09 pm-7:16 pm

Nonstop2h 07m

$157

OntarioBoise

ONT - BOI

ONTBOI

Ontario

Fri 2/13

7:37 pm-10:36 pm

Nonstop1h 59m

Boise Air Term. Gowen Fld

Tue 2/17

6:07 pm-7:14 pm

Nonstop2h 07m

$157

OntarioBoise

ONT - BOI

ONTBOI

Ontario

Thu 1/8

7:56 pm-10:57 pm

Nonstop2h 01m

Boise Air Term. Gowen Fld

Sun 1/11

6:09 pm-7:16 pm

Nonstop2h 07m

$166

OntarioBoise

ONT - BOI

ONTBOI

Ontario

Sat 1/17

7:56 pm-10:57 pm

Nonstop2h 01m

Boise Air Term. Gowen Fld

Mon 1/19

5:55 pm-3:08 pm

1 stop22h 13m

$172

OntarioBoise

ONT - BOI

ONTBOI

Ontario

Sat 2/28

7:37 pm-10:36 pm

Nonstop1h 59m

Boise Air Term. Gowen Fld

Tue 3/3

6:00 pm-10:44 pm

1 stop5h 44m

$172

OntarioBoise

ONT - BOI

ONTBOI

Ontario

Sat 2/28

7:00 am-1:17 pm

1 stop5h 17m

Boise Air Term. Gowen Fld

Tue 3/3

8:20 pm-11:52 pm

1 stop4h 32m

$176

OntarioBoise

ONT - BOI

ONTBOI

Ontario

Fri 1/23

7:56 pm-10:57 pm

Nonstop2h 01m

Boise Air Term. Gowen Fld

Sun 1/25

6:09 pm-7:16 pm

Nonstop2h 07m

$177

OntarioBoise

ONT - BOI

ONTBOI

Ontario

Thu 1/29

3:30 pm-9:58 pm

1 stop5h 28m

Boise Air Term. Gowen Fld

Sun 2/1

5:15 pm-10:44 pm

1 stop6h 29m

$187

OntarioBoise

ONT - BOI

ONTBOI

Ontario

Thu 1/8

7:30 am-4:17 pm

1 stop7h 47m

Boise Air Term. Gowen Fld

Sun 1/11

6:15 pm-10:38 pm

1 stop5h 23m

$187

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/25

Showing 1-10 of 60 results
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Best time to book a flight from Ontario to Idaho

Have a flexible travel schedule? Discover the best time to fly to Idaho 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 Idaho

What is the cheapest month to book a flight from Ontario to Idaho?

Currently, November is the cheapest month in which you can book a flight from Ontario to Idaho (average of $60). Flying from Ontario to Idaho in December is currently the most expensive (average of $159). 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 ID?

Find hourly flight availability from Ontario to Idaho. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated November 25, 2025.

A simple way to save on the total cost of your ticket is to fly from Ontario to Idaho in the evening. If you’re flexible enough to do this you can expect to save up to 21% on your trip compared to booking a flight in the afternoon.

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

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

Travelers seeking maximum savings on their Ontario to Idaho flight should consider departing on Tuesday evenings 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.

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

Reviews of airlines servicing Idaho

Get insights into the airlines that provide service to Idaho. 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 Idaho. Reviews last updated November 25, 2025.
See what other customers who have flown with Alaska Airlines, Southwest, and Delta from Ontario to Idaho have to say. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
11,352 reviews

Boarding

8.1

Food

7.1

Crew

8.5

Comfort

7.8

Overall

8.0

Entertainment

7.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Nov 2025

LAX - LIH

The staff were exceptional! They all were kind, accommodating, and professional.
Alaska Airlines
8.0
Very good
11,352 reviews
Alaska Airlines
8.0
Very good
11,352 reviews

Boarding

8.1

Food

7.1

Crew

8.5

Comfort

7.8

Overall

8.0

Entertainment

7.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Nov 2025

LAX - LIH

The staff were exceptional! They all were kind, accommodating, and professional.
Southwest
8.0
Very good
4,254 reviews
Alaska Airlines
8.0
Very good
11,352 reviews

Boarding

8.1

Food

7.1

Crew

8.5

Comfort

7.8

Overall

8.0

Entertainment

7.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Nov 2025

LAX - LIH

The staff were exceptional! They all were kind, accommodating, and professional.
Delta
7.9
Good
7,999 reviews
Alaska Airlines
8.0
Very good
11,352 reviews

Boarding

8.1

Food

7.1

Crew

8.5

Comfort

7.8

Overall

8.0

Entertainment

7.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Nov 2025

LAX - LIH

The staff were exceptional! They all were kind, accommodating, and professional.
United Airlines
7.4
Good
9,046 reviews
Alaska Airlines
8.0
Very good
11,352 reviews

Boarding

8.1

Food

7.1

Crew

8.5

Comfort

7.8

Overall

8.0

Entertainment

7.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Nov 2025

LAX - LIH

The staff were exceptional! They all were kind, accommodating, and professional.
American Airlines
7.2
Good
11,038 reviews
Alaska Airlines
8.0
Very good
11,352 reviews

Boarding

8.1

Food

7.1

Crew

8.5

Comfort

7.8

Overall

8.0

Entertainment

7.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Nov 2025

LAX - LIH

The staff were exceptional! They all were kind, accommodating, and professional.

Related info for your journey

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

  • What airport do you fly from for flights from Ontario to Idaho?

    Located just 3.1 mi from the city center, Ontario (ONT) is the airport most travelers will use when flying to Idaho from Ontario.

  • How long is the flight from Ontario to Idaho?

    Airlines like Southwest, Alaska Airlines, and Hawaiian Airlines fly from Ontario to Idaho in about 2h 01m. The time it takes to get you to your destination can typically vary by up to 4h 43m. There are 661 mi between Ontario and Idaho. This flight may include one or multiple stops.

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

    The cheapest airlines for a one-way flight from Ontario to Idaho are Alaska Airlines ($88), Hawaiian Airlines ($108), and United Airlines ($121).

  • What are the most popular routes from Ontario to Idaho?

    The most popular flight routes from Ontario to Idaho are Ontario - Boise Air Term. Gowen Fld, Ontario - Spokane and Ontario - Jackson Hole.

  • What are the cheapest flights from Ontario to Idaho?

    Looking at all options, your cheapest flight can be booked for $137. While the most popular route (Ontario - Boise Air Term. Gowen Fld) can be booked for $136 on average, our data indicates $171 when flying from Ontario to Idaho.

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

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

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

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

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

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

    Currently, November is the cheapest month in which you can book a flight from Ontario to Idaho (average of $60). Flying from Ontario to Idaho in December is currently the most expensive (average of $159). 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 Ontario to Idaho

See prices for flight routes from nearby airports that may be better suited for you.
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Top 5 airlines flying from Ontario to Idaho

Discover the top 5 airlines that operate flights from Ontario to Idaho. 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 November 25, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$158Average$366FlexibilityNo cancel feeOn-timeN/A
Alaska AirlinesCheapest$171Average$250FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$196Average$315FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$234Average$352FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$258Average$516FlexibilityNo cancel feeOn-time71%

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