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$55+ 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 20 — Dec 271
Sat 12/20
Sat 12/27
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 20, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$124
(Frontier)

One-way from

$55
(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. 10% potential increase in price ($34 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($6 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 20, 2025.

This Kiwi.com deal was found by Cheapflights users on 11/19. 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
Mon 12/1510:41 pmBOI - ONT
1 stop23h 36mMultiple Airlines
Deal found 11/19$173
This Southwest deal was found by Cheapflights users on 11/19. 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.
Sat 12/137:20 amONT - BOI
1 stop3h 45mSouthwest
Sun 12/147:05 amBOI - ONT
1 stop6h 30mSouthwest
Deal found 11/19$177
This Kiwi.com deal was found by Cheapflights users on 11/18. 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 12/42:59 pmONT - BOI
1 stop23h 45mMultiple Airlines
Mon 12/810:41 pmBOI - ONT
1 stop23h 36mMultiple Airlines
Deal found 11/18$179
This Alaska Airlines deal was found by Cheapflights users on 11/19. 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 12/106:00 amONT - GEG
1 stop15h 28mAlaska Airlines
Mon 12/158:47 pmGEG - ONT
1 stop14h 32mAlaska Airlines
Deal found 11/19$184
This Delta deal was found by Cheapflights users on 11/19. 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 12/115:49 pmONT - BOI
1 stop5h 15mDelta
Sun 12/145:20 amBOI - ONT
1 stop6h 53mDelta
Deal found 11/19$187
This Kiwi.com deal was found by Cheapflights users on 11/20. 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 12/56:15 amONT - BOI
1 stop8h 29mMultiple Airlines
Mon 12/810:41 pmBOI - ONT
1 stop23h 36mMultiple Airlines
Deal found 11/20$188
This Delta deal was found by Cheapflights users on 11/19. 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 12/106:00 amONT - BOI
2 stops9h 02mDelta
Sun 12/144:45 pmBOI - ONT
1 stop7h 02mDelta
Deal found 11/19$192
This Southwest deal was found by Cheapflights users on 11/19. 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 12/97:55 amONT - BOI
1 stop3h 25mSouthwest
Wed 12/102:30 pmBOI - ONT
1 stop6h 30mSouthwest
Deal found 11/19$205
This Kiwi.com deal was found by Cheapflights users on 11/20. 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 12/116:15 amONT - GEG
1 stop14h 08mMultiple Airlines
Sun 12/149:13 pmGEG - ONT
1 stop24h 04mMultiple Airlines
Deal found 11/20$214
This Kiwi.com deal was found by Cheapflights users on 11/19. 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 11/19$215
This Southwest deal was found by Cheapflights users on 11/19. 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 12/175:55 amONT - BOI
1 stop7h 10mSouthwest
Wed 12/2412:55 pmBOI - ONT
1 stop6h 35mSouthwest
Deal found 11/19$217
This Delta deal was found by Cheapflights users on 11/20. 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 12/1612:40 pmONT - GEG
1 stop11h 31mDelta
Wed 12/244:53 pmGEG - ONT
1 stop5h 40mDelta
Deal found 11/20$223

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 20, 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

OntarioSpokane

ONT - GEG

ONTGEG

Ontario

Sun 1/11

6:00 am-12:24 pm

1 stop6h 24m

Spokane

Thu 1/15

11:22 am-11:59 pm

1 stop12h 37m

$124

OntarioBoise

ONT - BOI

ONTBOI

Ontario

Wed 1/7

7:56 pm-10:57 pm

Nonstop2h 01m

Boise Air Term. Gowen Fld

Tue 1/13

6:09 pm-7:16 pm

Nonstop2h 07m

$137

OntarioBoise

ONT - BOI

ONTBOI

Ontario

Wed 1/7

11:15 am-4:50 pm

1 stop4h 35m

Boise Air Term. Gowen Fld

Tue 1/13

3:35 pm-8:45 pm

1 stop6h 10m

$157

OntarioBoise

ONT - BOI

ONTBOI

Ontario

Sat 1/17

7:56 pm-10:57 pm

Nonstop2h 01m

Boise Air Term. Gowen Fld

Sun 1/18

6:09 pm-7:16 pm

Nonstop2h 07m

$157

OntarioBoise

ONT - BOI

ONTBOI

Ontario

Wed 1/21

7:56 pm-10:57 pm

Nonstop2h 01m

Boise Air Term. Gowen Fld

Sun 1/25

6:09 pm-7:16 pm

Nonstop2h 07m

$157

OntarioBoise

ONT - BOI

ONTBOI

Ontario

Sat 1/10

7:56 pm-10:57 pm

Nonstop2h 01m

Boise Air Term. Gowen Fld

Sun 1/11

6:09 pm-7:16 pm

Nonstop2h 07m

$167

OntarioBoise

ONT - BOI

ONTBOI

Ontario

Wed 1/14

7:00 am-12:54 pm

1 stop4h 54m

Boise Air Term. Gowen Fld

Sat 1/17

1:55 pm-8:36 pm

1 stop7h 41m

$176

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

$177

OntarioBoise

ONT - BOI

ONTBOI

Ontario

Fri 1/9

7:56 pm-10:57 pm

Nonstop2h 01m

Boise Air Term. Gowen Fld

Sun 1/11

6:09 pm-7:16 pm

Nonstop2h 07m

$177

OntarioBoise

ONT - BOI

ONTBOI

Ontario

Fri 1/16

7:56 pm-10:57 pm

Nonstop2h 01m

Boise Air Term. Gowen Fld

Sun 1/18

6:09 pm-7:16 pm

Nonstop2h 07m

$177

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/17

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, 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 $166). 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 20, 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.

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 20, 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
11,326 reviews

Boarding

8.1

Entertainment

7.0

Crew

8.5

Overall

8.0

Comfort

7.8

Food

7.1

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
11,326 reviews
Alaska Airlines
8.0
Very good
11,326 reviews

Boarding

8.1

Entertainment

7.0

Crew

8.5

Overall

8.0

Comfort

7.8

Food

7.1

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
4,251 reviews
Alaska Airlines
8.0
Very good
11,326 reviews

Boarding

8.1

Entertainment

7.0

Crew

8.5

Overall

8.0

Comfort

7.8

Food

7.1

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
7.9
Good
8,002 reviews
Alaska Airlines
8.0
Very good
11,326 reviews

Boarding

8.1

Entertainment

7.0

Crew

8.5

Overall

8.0

Comfort

7.8

Food

7.1

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
9,028 reviews
Alaska Airlines
8.0
Very good
11,326 reviews

Boarding

8.1

Entertainment

7.0

Crew

8.5

Overall

8.0

Comfort

7.8

Food

7.1

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
11,047 reviews
Alaska Airlines
8.0
Very good
11,326 reviews

Boarding

8.1

Entertainment

7.0

Crew

8.5

Overall

8.0

Comfort

7.8

Food

7.1

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 Frontier, Alaska Airlines, and Southwest 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 23m. 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 ($89), United Airlines ($164), and Delta ($165).

  • 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 $171. While the most popular route (Ontario - Boise Air Term. Gowen Fld) can be booked for $168 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 $166). 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 November 20, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$158Average$366FlexibilityNo cancel feeOn-timeN/A
Alaska AirlinesCheapest$171Average$256FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$196Average$315FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$218Average$516FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$234Average$353FlexibilityNo cancel feeOn-time63%

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