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Idaho

$69+ 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 2/28. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — BOI
Jan 2 — Jan 91
Fri 1/2
Fri 1/9
1 adult, Economy
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Cheap 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 December 3, 2025.

This Southwest deal was found by Cheapflights users on 12/3. 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.
Wed 12/313:55 pmONT - BOI
1 stop3h 45mSouthwest
Wed 1/76:40 amBOI - ONT
1 stop6h 45mSouthwest
Deal found 12/3$184
This Mytrip deal was found by Cheapflights users on 12/1. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/1112:04 pmONT - BOI
1 stop22h 45mFrontier
Sun 12/1412:44 pmBOI - ONT
1 stop26h 41mFrontier
Deal found 12/1$221
This Southwest deal was found by Cheapflights users on 11/30. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/305:10 pmONT - BOI
1 stop5h 55mSouthwest
Tue 1/63:35 pmBOI - ONT
1 stop6h 10mSouthwest
Deal found 11/30$224
This Delta deal was found by Cheapflights users on 12/1. 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 12/296:00 amONT - BOI
1 stop5h 02mDelta
Mon 1/55:15 pmBOI - ONT
1 stop6h 36mDelta
Deal found 12/1$232
This Cheapflightsfares deal was found by Cheapflights users on 12/1. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/316:05 pmONT - BOI
1 stop4h 52mAlaska Airlines
Wed 1/76:09 pmBOI - ONT
Nonstop2h 07mAlaska Airlines
Deal found 12/1$243
This Mytrip deal was found by Cheapflights users on 11/30. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/63:20 pmONT - BOI
1 stop19h 29mFrontier
Sun 12/1412:44 pmBOI - ONT
1 stop26h 41mFrontier
Deal found 11/30$247
This Delta deal was found by Cheapflights users on 12/1. 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 - JAC
1 stop3h 40mDelta
Fri 12/265:40 pmJAC - ONT
1 stop7h 14mDelta
Deal found 12/1$249
This Mytrip deal was found by Cheapflights users on 12/1. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/266:45 amONT - GEG
1 stop28h 22mFrontier
Tue 12/3012:02 pmGEG - ONT
1 stop11h 57mFrontier
Deal found 12/1$252
This United Airlines deal was found by Cheapflights users on 12/2. 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 12/235:05 amONT - JAC
1 stop7h 19mUnited Airlines
Thu 12/252:30 pmJAC - ONT
1 stop7h 37mUnited Airlines
Deal found 12/2$255
This Gotogate deal was found by Cheapflights users on 12/1. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/246:45 amONT - BOI
1 stop27h 58mFrontier
Sun 12/2812:38 pmBOI - ONT
1 stop12h 21mFrontier
Deal found 12/1$267
This Mytrip deal was found by Cheapflights users on 12/2. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/266:45 amONT - BOI
1 stop28h 14mFrontier
Sun 12/2812:38 pmBOI - ONT
1 stop12h 21mFrontier
Deal found 12/2$268
This Delta deal was found by Cheapflights users on 12/1. 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 12/164:49 pmONT - JAC
1 stop3h 40mDelta
Sat 12/207:00 amJAC - ONT
1 stop6h 29mDelta
Deal found 12/1$269

Find flight deals from Ontario to Idaho

Keep the following information in mind while searching for Ontario to Idaho flight deals. Data was last updated December 3, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$97
(Alaska Airlines)

One-way from

$69
(Delta)

Popular in

December

Cheapest in

February

Average price

$361

Good round-trip deal

$171 or less
Provider with most accurate pricing for Los Angeles-Boise Air Term. Gowen Fld flight deals.
Search Deals
Provider most trusted by Cheapflights users for Los Angeles-Boise Air Term. Gowen Fld flights.
Search Deals
From Ontario to Idaho
Search Deals
One-way flight from Ontario to Idaho
Search Deals
Highest demand for flights based on searches. 10% potential increase in price ($32 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($7 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals
Price to beat on a round-trip flight from Ontario to Idaho.
Search Deals

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 December 3, 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

Sat 2/28

7:37 pm-10:36 pm

Nonstop1h 59m

Boise Air Term. Gowen Fld

Tue 3/3

6:07 pm-7:14 pm

Nonstop2h 07m

$97

OntarioBoise

ONT - BOI

ONTBOI

Ontario

Thu 2/26

7:37 pm-10:36 pm

Nonstop1h 59m

Boise Air Term. Gowen Fld

Sun 3/1

5:50 pm-6:57 pm

Nonstop2h 07m

$117

OntarioBoise

ONT - BOI

ONTBOI

Ontario

Thu 1/8

7:56 pm-10:57 pm

Nonstop2h 01m

Boise Air Term. Gowen Fld

Mon 1/12

6:09 pm-7:16 pm

Nonstop2h 07m

$117

OntarioBoise

ONT - BOI

ONTBOI

Ontario

Wed 2/11

3:30 pm-9:58 pm

1 stop5h 28m

Boise Air Term. Gowen Fld

Sun 2/15

6:20 pm-9:44 pm

1 stop4h 24m

$137

OntarioBoise

ONT - BOI

ONTBOI

Ontario

Wed 2/11

5:10 pm-11:12 pm

1 stop5h 02m

Boise Air Term. Gowen Fld

Sat 2/14

6:20 pm-9:44 pm

1 stop4h 24m

$137

OntarioBoise

ONT - BOI

ONTBOI

Ontario

Thu 1/15

3:30 pm-9:58 pm

1 stop5h 28m

Boise Air Term. Gowen Fld

Sun 1/18

6:15 pm-9:48 pm

1 stop4h 33m

$137

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

$137

OntarioBoise

ONT - BOI

ONTBOI

Ontario

Thu 1/8

3:30 pm-9:58 pm

1 stop5h 28m

Boise Air Term. Gowen Fld

Mon 1/12

7:25 am-1:56 pm

1 stop7h 31m

$137

OntarioBoise

ONT - BOI

ONTBOI

Ontario

Sat 1/17

3:30 pm-9:58 pm

1 stop5h 28m

Boise Air Term. Gowen Fld

Sun 1/18

6:15 pm-9:48 pm

1 stop4h 33m

$138

OntarioBoise

ONT - BOI

ONTBOI

Ontario

Wed 1/21

6:05 am-12:25 pm

1 stop5h 20m

Boise Air Term. Gowen Fld

Wed 1/28

4:00 pm-8:45 pm

2 stops5h 45m

$145

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/2

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 December 3, 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 32% 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.

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 December 3, 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
11,396 reviews

Boarding

8.1

Entertainment

7.0

Overall

8.0

Crew

8.5

Comfort

7.8

Food

7.1

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
11,396 reviews
Alaska Airlines
8.0
Very good
11,396 reviews

Boarding

8.1

Entertainment

7.0

Overall

8.0

Crew

8.5

Comfort

7.8

Food

7.1

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
11,396 reviews

Boarding

8.1

Entertainment

7.0

Overall

8.0

Crew

8.5

Comfort

7.8

Food

7.1

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
8,011 reviews
Alaska Airlines
8.0
Very good
11,396 reviews

Boarding

8.1

Entertainment

7.0

Overall

8.0

Crew

8.5

Comfort

7.8

Food

7.1

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
9,065 reviews
Alaska Airlines
8.0
Very good
11,396 reviews

Boarding

8.1

Entertainment

7.0

Overall

8.0

Crew

8.5

Comfort

7.8

Food

7.1

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
11,044 reviews
Alaska Airlines
8.0
Very good
11,396 reviews

Boarding

8.1

Entertainment

7.0

Overall

8.0

Crew

8.5

Comfort

7.8

Food

7.1

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 Alaska Airlines, Delta, and Hawaiian Airlines fly from Ontario to Idaho in about 1h 59m. The time it takes to get you to your destination can typically vary by up to 8h 07m. 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 ($69), Delta ($88), and United Airlines ($98).

  • 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 - Jackson Hole and Ontario - Spokane.

  • 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 $97 on average, our data indicates $177 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 December 3, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$158Average$366FlexibilityNo cancel feeOn-timeN/A
Alaska AirlinesCheapest$171Average$247FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$196Average$315FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$220Average$350FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$258Average$516FlexibilityNo cancel feeOn-time71%

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