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Ontario

$105+ 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 5/20. Fares are subject to change and may not be available on all flights or dates of travel.
BOI — ONT
May 6 — May 131
Tue 5/6
Tue 5/13
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 May 1, 2025.

Most accurate provider

Mytrip
3 stars

Most trusted provider

Mytrip
3 stars

Round-trip from

$208
(Frontier)

One-way from

$105
(Frontier)

Popular in

March

Cheapest in

April

Average price

$256
Provider with most accurate pricing for Boise Air Term. Gowen Fld-Los Angeles flight deals.
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Provider most trusted by Cheapflights users for Boise Air Term. Gowen Fld-Los Angeles flights.
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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. 2% potential increase in price ($6 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 May 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 May 1, 2025.

This Frontier deal was found by Cheapflights users on 4/29. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/152:57 pmBOI - ONT
1 stop10h 02mFrontier
Mon 5/1912:59 amONT - BOI
1 stop11h 38mFrontier
Deal found 4/29$208
This Alaska Airlines deal was found by Cheapflights users on 4/29. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/2910:45 amGEG - ONT
1 stop5h 05mAlaska Airlines
Thu 5/297:20 pmONT - GEG
1 stop4h 34mAlaska Airlines
Deal found 4/29$215
This Alaska Airlines deal was found by Cheapflights users on 4/29. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/35:39 pmBOI - ONT
1 stop6h 07mAlaska Airlines
Tue 6/104:45 pmONT - BOI
1 stop4h 57mAlaska Airlines
Deal found 4/29$218
This Delta deal was found by Cheapflights users on 4/29. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/312:50 pmBOI - ONT
1 stop4h 27mDelta
Wed 6/115:50 pmONT - BOI
1 stop5h 09mDelta
Deal found 4/29$219
This Delta deal was found by Cheapflights users on 4/29. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/305:00 amGEG - ONT
1 stop6h 04mDelta
Fri 5/307:05 pmONT - GEG
1 stop5h 00mDelta
Deal found 4/29$221
This Hawaiian Airlines deal was found by Cheapflights users on 4/30. 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.
Wed 5/281:40 pmGEG - ONT
1 stop4h 45mHawaiian Airlines
Wed 6/44:45 pmONT - GEG
1 stop5h 40mHawaiian Airlines
Deal found 4/30$229
This Expedia deal was found by Cheapflights users on 4/29. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/132:41 pmBOI - ONT
1 stop6h 48mMultiple Airlines
Mon 5/1912:59 amONT - BOI
1 stop11h 38mMultiple Airlines
Deal found 4/29$240
This Hawaiian Airlines deal was found by Cheapflights users on 4/29. 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 7/296:25 amBOI - ONT
1 stop5h 40mHawaiian Airlines
Wed 8/64:00 pmONT - BOI
1 stop5h 46mHawaiian Airlines
Deal found 4/29$256
This Southwest deal was found by Cheapflights users on 4/30. 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.
Sat 8/302:00 pmGEG - ONT
1 stop4h 00mSouthwest
Wed 9/32:10 pmONT - GEG
2 stops7h 20mSouthwest
Deal found 4/30$262
This United Airlines deal was found by Cheapflights users on 4/29. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/237:07 pmBOI - ONT
1 stop4h 52mUnited Airlines
Mon 5/266:00 amONT - BOI
1 stop6h 50mUnited Airlines
Deal found 4/29$270
This Southwest deal was found by Cheapflights users on 4/29. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/33:00 pmBOI - ONT
2 stops6h 10mSouthwest
Sun 6/88:45 pmONT - BOI
1 stop3h 55mSouthwest
Deal found 4/29$278
This United Airlines deal was found by Cheapflights users on 4/29. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/61:40 pmGEG - ONT
1 stop7h 13mUnited Airlines
Wed 5/75:05 amONT - GEG
1 stop7h 33mUnited Airlines
Deal found 4/29$291

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 May 1, 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 5/15

2:57 pm-11:59 pm

1 stop10h 02m

Ontario

Mon 5/19

12:59 am-1:37 pm

1 stop11h 38m

$208

SpokaneOntario

GEG - ONT

GEGONT

Spokane

Thu 5/29

10:45 am-3:50 pm

1 stop5h 05m

Ontario

Thu 5/29

7:20 pm-11:54 pm

1 stop4h 34m

$215

BoiseOntario

BOI - ONT

BOIONT

Boise Air Term. Gowen Fld

Tue 6/3

5:39 pm-10:46 pm

1 stop6h 07m

Ontario

Tue 6/10

4:45 pm-10:42 pm

1 stop4h 57m

$218

BoiseOntario

BOI - ONT

BOIONT

Boise Air Term. Gowen Fld

Tue 6/3

12:50 pm-4:17 pm

1 stop4h 27m

Ontario

Wed 6/11

5:50 pm-11:59 pm

1 stop5h 09m

$219

SpokaneOntario

GEG - ONT

GEGONT

Spokane

Fri 5/30

7:00 pm-11:42 pm

1 stop4h 42m

Ontario

Sat 5/31

11:44 am-6:51 pm

1 stop7h 07m

$221

SpokaneOntario

GEG - ONT

GEGONT

Spokane

Sat 5/24

4:16 pm-10:46 pm

1 stop6h 30m

Ontario

Wed 5/28

4:45 pm-10:25 pm

1 stop5h 40m

$235

BoiseOntario

BOI - ONT

BOIONT

Boise Air Term. Gowen Fld

Tue 5/13

2:41 pm-8:29 pm

1 stop6h 48m

Ontario

Mon 5/19

12:59 am-1:37 pm

1 stop11h 38m

$240

BoiseOntario

BOI - ONT

BOIONT

Boise Air Term. Gowen Fld

Tue 7/29

6:25 am-11:05 am

1 stop5h 40m

Ontario

Wed 8/6

4:00 pm-10:46 pm

1 stop5h 46m

$256

SpokaneOntario

GEG - ONT

GEGONT

Spokane

Sat 8/30

2:00 pm-6:00 pm

1 stop4h 00m

Ontario

Wed 9/3

2:10 pm-9:30 pm

2 stops7h 20m

$262

BoiseOntario

BOI - ONT

BOIONT

Boise Air Term. Gowen Fld

Fri 5/23

7:07 pm-10:59 pm

1 stop4h 52m

Ontario

Mon 5/26

6:00 am-1:50 pm

1 stop6h 50m

$270

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/29

Showing 1-10 of 40 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 May 1, 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.

Rainfall in Ontario by month

Plan your trip to Ontario by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Ontario ranges from 0.1 - 3.4 inches per month. February is typically the wettest month, when rainfall can reach 3.4 in. June is typically the driest time to visit Ontario when rainfall is around 0.1 in.

Temperature in Ontario by month

Plan your trip to Ontario by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Ontario, use this chart to help with planning. For those seeking warmer temperatures, August is the ideal time of year to visit, when temperatures reach an average of 78.8 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 53.6 F).

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 May 1, 2025.
Peruse reviews from past customers who have flown with Alaska Airlines, Southwest and Delta from Idaho to Ontario to help guide your decision. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
9,968 reviews

Food

7.1

Boarding

8.2

Crew

8.5

Entertainment

7.1

Comfort

7.9

Overall

8.0

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
9,968 reviews
Alaska Airlines
8.0
Very good
9,968 reviews

Food

7.1

Boarding

8.2

Crew

8.5

Entertainment

7.1

Comfort

7.9

Overall

8.0

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
4,294 reviews
Alaska Airlines
8.0
Very good
9,968 reviews

Food

7.1

Boarding

8.2

Crew

8.5

Entertainment

7.1

Comfort

7.9

Overall

8.0

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
7,934 reviews
Alaska Airlines
8.0
Very good
9,968 reviews

Food

7.1

Boarding

8.2

Crew

8.5

Entertainment

7.1

Comfort

7.9

Overall

8.0

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Hawaiian Airlines
7.9
Good
2,408 reviews
Alaska Airlines
8.0
Very good
9,968 reviews

Food

7.1

Boarding

8.2

Crew

8.5

Entertainment

7.1

Comfort

7.9

Overall

8.0

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
8,696 reviews
Alaska Airlines
8.0
Very good
9,968 reviews

Food

7.1

Boarding

8.2

Crew

8.5

Entertainment

7.1

Comfort

7.9

Overall

8.0

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 Frontier, with whom users have recently found tickets for as low as $105. However, be on the lookout for offers from Alaska Airlines and Delta, 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, Spokane - Ontario and Idaho Falls Fanning Field - 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 May 1, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$164Average$389FlexibilityNo cancel feeOn-timeN/A
Alaska AirlinesCheapest$201Average$319FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$218Average$468FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$240Average$357FlexibilityNo cancel feeOn-time63%

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