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Ontario

$89+ 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 7/19. Fares are subject to change and may not be available on all flights or dates of travel.
BOI — ONT
Jun 17 — Jun 241
Tue 6/17
Tue 6/24
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 June 12, 2025.

Round-trip from

$174
(Southwest)

One-way from

$89
(Alaska Airlines)

Popular in

March

Cheapest in

April

Average price

$262
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 ($4 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 June 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 June 12, 2025.

This Southwest deal was found by Cheapflights users on 6/10. 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 9/62:00 pmGEG - ONT
1 stop4h 00mSouthwest
Sun 9/710:25 amONT - GEG
1 stop5h 30mSouthwest
Deal found 6/10$174
This Alaska Airlines deal was found by Cheapflights users on 6/11. 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 7/86:07 pmGEG - ONT
1 stop6h 06mAlaska Airlines
Wed 7/96:00 amONT - GEG
1 stop6h 28mAlaska Airlines
Deal found 6/11$178
This Delta deal was found by Cheapflights users on 6/10. 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 7/43:36 pmGEG - ONT
1 stop7h 10mDelta
Mon 7/75:59 pmONT - GEG
1 stop4h 49mDelta
Deal found 6/10$180
This Delta deal was found by Cheapflights users on 6/11. 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 7/27:30 amBOI - ONT
1 stop7h 55mDelta
Sat 7/55:08 pmONT - BOI
1 stop5h 05mDelta
Deal found 6/11$199
This Alaska Airlines deal was found by Cheapflights users on 6/9. 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 7/26:25 amBOI - ONT
1 stop5h 40mAlaska Airlines
Sat 7/56:00 amONT - BOI
1 stop8h 04mAlaska Airlines
Deal found 6/9$219
This Hawaiian Airlines deal was found by Cheapflights users on 6/9. 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.
Mon 9/87:17 pmBOI - ONT
1 stop5h 42mHawaiian Airlines
Sun 9/143:04 pmONT - BOI
1 stop6h 36mHawaiian Airlines
Deal found 6/9$265
This Alaska Airlines deal was found by Cheapflights users on 6/11. 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 9/26:13 amIDA - ONT
1 stop5h 31mAlaska Airlines
Wed 9/106:00 amONT - IDA
1 stop8h 23mAlaska Airlines
Deal found 6/11$267
This Frontier deal was found by Cheapflights users on 6/10. 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 8/2811:52 amGEG - ONT
1 stop11h 58mFrontier
Sat 8/3012:59 amONT - GEG
1 stop10h 08mFrontier
Deal found 6/10$271
This Frontier deal was found by Cheapflights users on 6/9. 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 8/1412:36 pmBOI - ONT
1 stop12h 14mFrontier
Sat 8/1612:59 amONT - BOI
1 stop9h 47mFrontier
Deal found 6/9$281
This Delta deal was found by Cheapflights users on 6/11. 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 8/76:00 amIDA - ONT
1 stop3h 47mDelta
Tue 8/126:05 amONT - IDA
1 stop3h 34mDelta
Deal found 6/11$284
This Hawaiian Airlines deal was found by Cheapflights users on 6/11. 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.
Fri 7/116:07 pmGEG - ONT
1 stop6h 06mHawaiian Airlines
Sun 7/136:00 amONT - GEG
1 stop5h 04mHawaiian Airlines
Deal found 6/11$293
This Travelocity deal was found by Cheapflights users on 6/11. 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/55:46 pmGEG - ONT
1 stop6h 13mMultiple Airlines
Sat 9/612:59 amONT - GEG
1 stop10h 09mMultiple Airlines
Deal found 6/11$305

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 June 12, 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

SpokaneOntario

GEG - ONT

GEGONT

Spokane

Sat 9/6

2:00 pm-6:00 pm

1 stop4h 00m

Ontario

Sun 9/7

10:25 am-3:55 pm

1 stop5h 30m

$174

SpokaneOntario

GEG - ONT

GEGONT

Spokane

Tue 7/8

6:07 pm-12:13 am

1 stop6h 06m

Ontario

Wed 7/9

6:00 am-12:28 pm

1 stop6h 28m

$178

SpokaneOntario

GEG - ONT

GEGONT

Spokane

Thu 7/3

5:05 am-10:25 am

1 stop5h 20m

Ontario

Tue 7/8

2:14 pm-6:45 pm

1 stop4h 31m

$179

BoiseOntario

BOI - ONT

BOIONT

Boise Air Term. Gowen Fld

Wed 7/2

7:30 am-2:25 pm

1 stop7h 55m

Ontario

Sat 7/5

5:08 pm-11:13 pm

1 stop5h 05m

$199

BoiseOntario

BOI - ONT

BOIONT

Boise Air Term. Gowen Fld

Wed 7/2

6:25 am-11:05 am

1 stop5h 40m

Ontario

Sat 7/5

6:00 am-3:04 pm

1 stop8h 04m

$219

BoiseOntario

BOI - ONT

BOIONT

Boise Air Term. Gowen Fld

Mon 9/8

7:17 pm-11:59 pm

1 stop5h 42m

Ontario

Sun 9/14

3:04 pm-10:40 pm

1 stop6h 36m

$265

Idaho FallsOntario

IDA - ONT

IDAONT

Idaho Falls Fanning Field

Tue 9/2

6:13 am-10:44 am

1 stop5h 31m

Ontario

Wed 9/10

6:00 am-3:23 pm

1 stop8h 23m

$267

SpokaneOntario

GEG - ONT

GEGONT

Spokane

Thu 8/28

11:52 am-11:50 pm

1 stop11h 58m

Ontario

Sat 8/30

12:59 am-11:07 am

1 stop10h 08m

$271

BoiseOntario

BOI - ONT

BOIONT

Boise Air Term. Gowen Fld

Thu 8/14

12:36 pm-11:50 pm

1 stop12h 14m

Ontario

Sat 8/16

12:59 am-11:46 am

1 stop9h 47m

$281

Idaho FallsOntario

IDA - ONT

IDAONT

Idaho Falls Fanning Field

Thu 8/7

6:00 am-8:47 am

1 stop3h 47m

Ontario

Tue 8/12

6:05 am-10:39 am

1 stop3h 34m

$284

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/9

Showing 1-10 of 48 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 June 12, 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 June 12, 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
10,000 reviews

Boarding

8.1

Food

7.1

Crew

8.5

Comfort

7.8

Overall

8.0

Entertainment

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

Boarding

8.1

Food

7.1

Crew

8.5

Comfort

7.8

Overall

8.0

Entertainment

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
4,287 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Food

7.1

Crew

8.5

Comfort

7.8

Overall

8.0

Entertainment

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
7,950 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Food

7.1

Crew

8.5

Comfort

7.8

Overall

8.0

Entertainment

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
7.9
Good
2,494 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Food

7.1

Crew

8.5

Comfort

7.8

Overall

8.0

Entertainment

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
8,790 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Food

7.1

Crew

8.5

Comfort

7.8

Overall

8.0

Entertainment

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 $89. However, be on the lookout for offers from Southwest 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 Spokane - Ontario, Boise Air Term. Gowen Fld - 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 June 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$156Average$380FlexibilityNo cancel feeOn-timeN/A
Alaska AirlinesCheapest$201Average$317FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$218Average$353FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$240Average$356FlexibilityNo cancel feeOn-time63%

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