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Ontario

$80+ Cheap flights from Idaho to Ontario (ONT)

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 9/20. Fares are subject to change and may not be available on all flights or dates of travel.
BOI — ONT
Aug 5 — Aug 121
Tue 8/5
Tue 8/12
1 adult, Economy
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Cheap flight deals from Idaho to Ontario

Keep the following information in mind while searching for Idaho to Ontario flight deals. Data was last updated July 31, 2025.

Round-trip from

$215
(FlightHub)

One-way from

$80
(Trip.com)

Popular in

March

Cheapest in

April

Average price

$274
From Idaho to Ontario
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One-way flight from Idaho to Ontario
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Highest demand for flights based on searches. 1% potential increase in price ($2 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 July 2025
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Find flight deals from Idaho to Ontario

Cheapest flights from Idaho to Ontario
Explore the most affordable flight options available from Idaho to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 31, 2025.

This FlightHub deal was found by Cheapflights users on 7/29. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/712:36 pmBOI - ONT
1 stop12h 14mFrontier
Sat 8/165:21 pmONT - BOI
1 stop17h 25mFrontier
Deal found 7/29$215
This FlightHub deal was found by Cheapflights users on 7/30. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/2811:52 amGEG - ONT
1 stop11h 58mFrontier
Thu 10/28:59 pmONT - GEG
1 stop13h 59mFrontier
Deal found 7/30$225
This Alaska Airlines deal was found by Cheapflights users on 7/30. 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.
Wed 8/2712:10 pmGEG - ONT
1 stop6h 18mAlaska Airlines
Sun 8/317:22 pmONT - GEG
1 stop4h 37mAlaska Airlines
Deal found 7/30$228
This American Airlines deal was found by Cheapflights users on 7/30. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/25:22 pmBOI - ONT
1 stop5h 26mAmerican Airlines
Tue 10/710:09 amONT - BOI
1 stop8h 28mAmerican Airlines
Deal found 7/30$229
This Alaska Airlines deal was found by Cheapflights users on 7/30. 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.
Thu 9/258:00 amBOI - ONT
1 stop7h 12mAlaska Airlines
Mon 9/2911:39 amONT - BOI
1 stop5h 37mAlaska Airlines
Deal found 7/30$234
This Delta deal was found by Cheapflights users on 7/30. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/186:00 amBOI - ONT
1 stop3h 57mDelta
Sun 9/216:00 amONT - BOI
1 stop3h 34mDelta
Deal found 7/30$235
This Delta deal was found by Cheapflights users on 7/31. 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 11/135:05 amGEG - ONT
1 stop5h 45mDelta
Mon 11/175:05 pmONT - GEG
1 stop6h 34mDelta
Deal found 7/31$237
This Southwest deal was found by Cheapflights users on 7/30. 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.
Wed 10/16:15 amGEG - ONT
1 stop4h 05mSouthwest
Wed 10/153:50 pmONT - GEG
2 stops6h 40mSouthwest
Deal found 7/30$242
This Hawaiian Airlines deal was found by Cheapflights users on 7/29. 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.
Tue 8/1911:44 amGEG - ONT
1 stop6h 20mHawaiian Airlines
Fri 8/225:49 pmONT - GEG
1 stop5h 22mHawaiian Airlines
Deal found 7/29$247
This Hawaiian Airlines deal was found by Cheapflights users on 7/30. 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 Hawaiian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/49:00 amBOI - ONT
1 stop6h 12mHawaiian Airlines
Sun 9/76:00 amONT - BOI
1 stop6h 48mHawaiian Airlines
Deal found 7/30$266
This Alaska Airlines deal was found by Cheapflights users on 7/31. 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 9/176:13 amIDA - ONT
1 stop5h 31mAlaska Airlines
Sat 9/203:06 pmONT - IDA
1 stop6h 33mAlaska Airlines
Deal found 7/31$279
This Delta deal was found by Cheapflights users on 7/30. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/196:51 pmIDA - ONT
1 stop5h 51mDelta
Tue 9/304:40 pmONT - IDA
1 stop4h 45mDelta
Deal found 7/30$290

Cheapflights Fare Finder

 
Customize your flight search to find flights from Idaho to Ontario 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 July 31, 2025.
Use the filters below to find and compare flights from Idaho to Ontario that are best for you.

Fly from

Idaho

Fly to

Ontario

Route

Depart

Return

Price

BoiseOntario

BOI - ONT

BOIONT

Boise Air Term. Gowen Fld

Thu 9/18

12:22 pm-7:54 pm

1 stop8h 32m

Ontario

Wed 9/24

8:59 pm-11:37 am

1 stop13h 38m

$217

SpokaneOntario

GEG - ONT

GEGONT

Spokane

Thu 8/28

11:52 am-11:50 pm

1 stop11h 58m

Ontario

Thu 10/2

8:59 pm-10:58 am

1 stop13h 59m

$225

SpokaneOntario

GEG - ONT

GEGONT

Spokane

Wed 8/27

12:10 pm-6:28 pm

1 stop6h 18m

Ontario

Sun 8/31

7:22 pm-11:59 pm

1 stop4h 37m

$228

BoiseOntario

BOI - ONT

BOIONT

Boise Air Term. Gowen Fld

Thu 10/2

5:22 pm-9:48 pm

1 stop5h 26m

Ontario

Tue 10/7

10:09 am-7:37 pm

1 stop8h 28m

$229

BoiseOntario

BOI - ONT

BOIONT

Boise Air Term. Gowen Fld

Thu 9/25

8:00 am-2:12 pm

1 stop7h 12m

Ontario

Mon 9/29

11:39 am-6:16 pm

1 stop5h 37m

$234

BoiseOntario

BOI - ONT

BOIONT

Boise Air Term. Gowen Fld

Thu 9/18

6:00 am-8:57 am

1 stop3h 57m

Ontario

Sun 9/21

6:00 am-10:34 am

1 stop3h 34m

$235

SpokaneOntario

GEG - ONT

GEGONT

Spokane

Thu 11/13

5:05 am-10:50 am

1 stop5h 45m

Ontario

Mon 11/17

5:05 pm-11:39 pm

1 stop6h 34m

$237

SpokaneOntario

GEG - ONT

GEGONT

Spokane

Wed 10/1

6:15 am-10:20 am

1 stop4h 05m

Ontario

Wed 10/15

3:50 pm-10:30 pm

2 stops6h 40m

$242

SpokaneOntario

GEG - ONT

GEGONT

Spokane

Tue 8/19

11:44 am-6:04 pm

1 stop6h 20m

Ontario

Fri 8/22

5:49 pm-11:11 pm

1 stop5h 22m

$247

BoiseOntario

BOI - ONT

BOIONT

Boise Air Term. Gowen Fld

Thu 9/4

9:00 am-2:12 pm

1 stop6h 12m

Ontario

Sun 9/7

6:00 am-1:48 pm

1 stop6h 48m

$266

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/29

Showing 1-10 of 44 results
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Best time to book a flight from Idaho to Ontario

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

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

Currently, August is the cheapest month in which you can book a flight from Idaho to Ontario (average of $246). Flying from Idaho to Ontario in March is currently the most expensive (average of $328). 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 ID to ONT?

Find hourly flight availability from Idaho to Ontario. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated July 31, 2025.

When flying from Idaho to Ontario, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Reviews of airlines servicing Ontario

Get insights into the airlines that provide service to Ontario. 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 Ontario. Reviews last updated July 31, 2025.
Read through reviews of airlines operating flights from Idaho to Ontario, such as Alaska Airlines, Southwest, and Delta. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Crew

8.5

Boarding

8.1

Entertainment

7.1

Comfort

7.8

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

Overall

8.0

Crew

8.5

Boarding

8.1

Entertainment

7.1

Comfort

7.8

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
4,246 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Crew

8.5

Boarding

8.1

Entertainment

7.1

Comfort

7.8

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
7,981 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Crew

8.5

Boarding

8.1

Entertainment

7.1

Comfort

7.8

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
2,611 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Crew

8.5

Boarding

8.1

Entertainment

7.1

Comfort

7.8

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
8,900 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Crew

8.5

Boarding

8.1

Entertainment

7.1

Comfort

7.8

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 Idaho to Ontario. 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 into for flights to Ontario from Idaho?

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

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

    The cheapest airline one-way is Alaska Airlines, with whom users have recently found tickets for as low as $88. However, be on the lookout for offers from Frontier and Hawaiian Airlines, as they are both options that can get you from Idaho to Ontario for a low price.

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

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

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

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

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

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

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

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

    Currently, August is the cheapest month in which you can book a flight from Idaho to Ontario (average of $246). Flying from Idaho to Ontario in March is currently the most expensive (average of $328). 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 Idaho to Ontario

See prices for flight routes from nearby airports that may be better suited for you.
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Top 4 airlines flying from Idaho to Ontario

Discover the top 4 airlines that operate flights from Idaho to Ontario. 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 July 31, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$156Average$370FlexibilityNo cancel feeOn-timeN/A
Alaska AirlinesCheapest$201Average$318FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$233Average$368FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$240Average$361FlexibilityNo cancel feeOn-time63%

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