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$84+ 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 10/15. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — BOI
Oct 17 — Oct 241
Fri 10/17
Fri 10/24
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 September 17, 2025.

Round-trip from

$164
(Booking.com)

One-way from

$84
(Delta)

Popular in

December

Cheapest in

October

Average price

$284

Good round-trip deal

$157 or less
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 ($29 potential increase over avg. RT price).
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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 September 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 September 17, 2025.

This Frontier deal was found by Cheapflights users on 9/15. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/28:59 pmONT - BOI
1 stop13h 38mFrontier
Sun 10/512:22 pmBOI - ONT
1 stop20h 31mFrontier
Deal found 9/15$153
This Booking.com deal was found by Cheapflights users on 9/16. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/18:59 pmONT - BOI
1 stop13h 38mFrontier
Sun 10/512:22 pmBOI - ONT
1 stop20h 31mFrontier
Deal found 9/16$164
This Delta deal was found by Cheapflights users on 9/16. 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 10/187:35 amONT - BOI
1 stop7h 31mDelta
Mon 10/205:55 pmBOI - ONT
1 stop6h 44mDelta
Deal found 9/16$167
This Delta deal was found by Cheapflights users on 9/16. 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 10/87:35 amONT - BOI
1 stop15h 24mDelta
Mon 10/135:55 pmBOI - ONT
1 stop6h 44mDelta
Deal found 9/16$190
This Delta deal was found by Cheapflights users on 9/15. 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 10/147:35 amONT - BOI
1 stop7h 31mDelta
Tue 10/215:25 amBOI - ONT
1 stop6h 43mDelta
Deal found 9/15$217
This Delta deal was found by Cheapflights users on 9/16. 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.
Fri 10/245:50 pmONT - GEG
1 stop6h 09mDelta
Mon 10/274:50 pmGEG - ONT
1 stop6h 49mDelta
Deal found 9/16$223
This Alaska Airlines deal was found by Cheapflights users on 9/16. 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 10/75:45 pmONT - BOI
1 stop5h 12mAlaska Airlines
Sat 10/115:38 pmBOI - ONT
1 stop7h 25mAlaska Airlines
Deal found 9/16$226
This Kiwi.com deal was found by Cheapflights users on 9/16. 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.
Thu 10/29:16 amONT - GEG
1 stop11h 02mMultiple Airlines
Sun 10/59:08 pmGEG - ONT
1 stop10h 09mMultiple Airlines
Deal found 9/16$228
This Alaska Airlines deal was found by Cheapflights users on 9/15. 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.
Wed 10/85:45 pmONT - BOI
1 stop5h 12mAlaska Airlines
Sat 10/115:38 pmBOI - ONT
1 stop7h 25mAlaska Airlines
Deal found 9/15$236
This Delta deal was found by Cheapflights users on 9/16. 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 11/206:00 amONT - SUN
1 stop5h 26mDelta
Thu 12/47:30 amSUN - ONT
1 stop5h 52mDelta
Deal found 9/16$241
This Kiwi.com deal was found by Cheapflights users on 9/16. 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.
Thu 10/164:17 pmONT - BOI
2 stops18h 26mFrontier
Thu 10/2312:28 pmBOI - ONT
1 stop12h 22mFrontier
Deal found 9/16$242
This Alaska Airlines deal was found by Cheapflights users on 9/16. 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.
Wed 10/85:45 pmONT - GEG
1 stop5h 23mAlaska Airlines
Wed 10/157:37 pmGEG - ONT
1 stop4h 14mAlaska Airlines
Deal found 9/16$250

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 September 17, 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 10/14

7:35 am-4:06 pm

1 stop7h 31m

Boise Air Term. Gowen Fld

Tue 10/21

5:55 pm-11:39 pm

1 stop6h 44m

$167

OntarioBoise

ONT - BOI

ONTBOI

Ontario

Fri 10/17

4:35 pm-11:59 pm

1 stop6h 24m

Boise Air Term. Gowen Fld

Mon 10/20

5:55 pm-11:39 pm

1 stop6h 44m

$167

OntarioBoise

ONT - BOI

ONTBOI

Ontario

Tue 11/11

4:49 pm-12:35 am

1 stop6h 46m

Boise Air Term. Gowen Fld

Thu 11/13

11:42 am-5:09 pm

1 stop6h 27m

$167

OntarioBoise

ONT - BOI

ONTBOI

Ontario

Wed 10/15

5:50 pm-12:08 am

1 stop5h 18m

Boise Air Term. Gowen Fld

Sun 10/19

5:25 am-11:08 am

1 stop6h 43m

$167

OntarioBoise

ONT - BOI

ONTBOI

Ontario

Fri 10/24

11:48 am-8:16 pm

1 stop7h 28m

Boise Air Term. Gowen Fld

Sun 10/26

5:25 am-11:08 am

1 stop6h 43m

$167

OntarioBoise

ONT - BOI

ONTBOI

Ontario

Wed 10/8

7:35 am-11:59 pm

1 stop15h 24m

Boise Air Term. Gowen Fld

Mon 10/13

5:55 pm-11:39 pm

1 stop6h 44m

$190

OntarioBoise

ONT - BOI

ONTBOI

Ontario

Tue 11/4

11:48 am-6:51 pm

1 stop6h 03m

Boise Air Term. Gowen Fld

Sat 11/8

8:55 am-12:16 pm

1 stop4h 21m

$217

OntarioBoise

ONT - BOI

ONTBOI

Ontario

Sat 10/18

11:48 am-8:16 pm

1 stop7h 28m

Boise Air Term. Gowen Fld

Wed 10/22

4:46 pm-10:41 pm

1 stop6h 55m

$217

OntarioSpokane

ONT - GEG

ONTGEG

Ontario

Fri 10/24

5:50 pm-11:59 pm

1 stop6h 09m

Spokane

Mon 10/27

4:50 pm-11:39 pm

1 stop6h 49m

$223

OntarioSpokane

ONT - GEG

ONTGEG

Ontario

Mon 10/27

7:35 am-2:57 pm

1 stop7h 22m

Spokane

Thu 10/30

6:00 am-12:16 pm

1 stop6h 16m

$223

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/17

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, October is the cheapest month in which you can book a flight from Ontario to Idaho (average of $314). Flying from Ontario to Idaho 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 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 September 17, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Ontario to Idaho as you normally would.

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 September 17, 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
10,000 reviews

Crew

8.5

Food

7.1

Boarding

8.1

Comfort

7.8

Entertainment

7.1

Overall

8.0

Reviews

1 / 20
6.0
Good

Hannah,Aug 2025

SFO - SAN

Ticket said TSA pre check, but then the TSA agent said that Alaska Airlines has not actually entered the pre check information for the ticket, so I had to use regular security. During boarding, I have a disability and need to board early. The Alaska Airlines employee announced disability boarding, but then immediately announced 2 other groups to board, so I still had to fight the crowds. On the plane, the stewardess was brusk and rude. Seats were very uncomfortable, especially on lower back.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Crew

8.5

Food

7.1

Boarding

8.1

Comfort

7.8

Entertainment

7.1

Overall

8.0

Reviews

1 / 20
6.0
Good

Hannah,Aug 2025

SFO - SAN

Ticket said TSA pre check, but then the TSA agent said that Alaska Airlines has not actually entered the pre check information for the ticket, so I had to use regular security. During boarding, I have a disability and need to board early. The Alaska Airlines employee announced disability boarding, but then immediately announced 2 other groups to board, so I still had to fight the crowds. On the plane, the stewardess was brusk and rude. Seats were very uncomfortable, especially on lower back.
Southwest
8.0
Very good
4,242 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Crew

8.5

Food

7.1

Boarding

8.1

Comfort

7.8

Entertainment

7.1

Overall

8.0

Reviews

1 / 20
6.0
Good

Hannah,Aug 2025

SFO - SAN

Ticket said TSA pre check, but then the TSA agent said that Alaska Airlines has not actually entered the pre check information for the ticket, so I had to use regular security. During boarding, I have a disability and need to board early. The Alaska Airlines employee announced disability boarding, but then immediately announced 2 other groups to board, so I still had to fight the crowds. On the plane, the stewardess was brusk and rude. Seats were very uncomfortable, especially on lower back.
Delta
8.0
Very good
7,961 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Crew

8.5

Food

7.1

Boarding

8.1

Comfort

7.8

Entertainment

7.1

Overall

8.0

Reviews

1 / 20
6.0
Good

Hannah,Aug 2025

SFO - SAN

Ticket said TSA pre check, but then the TSA agent said that Alaska Airlines has not actually entered the pre check information for the ticket, so I had to use regular security. During boarding, I have a disability and need to board early. The Alaska Airlines employee announced disability boarding, but then immediately announced 2 other groups to board, so I still had to fight the crowds. On the plane, the stewardess was brusk and rude. Seats were very uncomfortable, especially on lower back.
United Airlines
7.4
Good
8,926 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Crew

8.5

Food

7.1

Boarding

8.1

Comfort

7.8

Entertainment

7.1

Overall

8.0

Reviews

1 / 20
6.0
Good

Hannah,Aug 2025

SFO - SAN

Ticket said TSA pre check, but then the TSA agent said that Alaska Airlines has not actually entered the pre check information for the ticket, so I had to use regular security. During boarding, I have a disability and need to board early. The Alaska Airlines employee announced disability boarding, but then immediately announced 2 other groups to board, so I still had to fight the crowds. On the plane, the stewardess was brusk and rude. Seats were very uncomfortable, especially on lower back.
American Airlines
7.2
Good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Crew

8.5

Food

7.1

Boarding

8.1

Comfort

7.8

Entertainment

7.1

Overall

8.0

Reviews

1 / 20
6.0
Good

Hannah,Aug 2025

SFO - SAN

Ticket said TSA pre check, but then the TSA agent said that Alaska Airlines has not actually entered the pre check information for the ticket, so I had to use regular security. During boarding, I have a disability and need to board early. The Alaska Airlines employee announced disability boarding, but then immediately announced 2 other groups to board, so I still had to fight the crowds. On the plane, the stewardess was brusk and rude. Seats were very uncomfortable, especially on lower back.

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 Delta, Hawaiian Airlines, and Alaska Airlines fly from Ontario to Idaho in about 4h 30m. The time it takes to get you to your destination can typically vary by up to 3h 01m. There are 936 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 ($103), Hawaiian Airlines ($108), and Delta ($112).

  • 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 $157. While the most popular route (Ontario - Boise Air Term. Gowen Fld) can be booked for $167 on average, our data indicates $217 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, October is the cheapest month in which you can book a flight from Ontario to Idaho (average of $314). Flying from Ontario to Idaho 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.

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Alternative routes for Ontario to Idaho

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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 September 17, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$169Average$357FlexibilityNo cancel feeOn-timeN/A
Alaska AirlinesCheapest$178Average$271FlexibilityNo cancel feeOn-time75%
American AirlinesCheapest$218Average$516FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$234Average$330FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$238Average$348FlexibilityNo cancel feeOn-time63%

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