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$65+ 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 6/3. Fares are subject to change and may not be available on all flights or dates of travel.
BOI — ONT
Feb 25 — Mar 41
Tue 2/25
Tue 3/4
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 February 20, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$212
(Southwest)

One-way from

$65
(Frontier)

Popular in

March

Cheapest in

August

Average price

$248
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. 3% potential increase in price ($10 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 February 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 February 20, 2025.

This Southwest deal was found by Cheapflights users on 2/19. 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.
Thu 5/16:10 amBOI - ONT
1 stop5h 50mSouthwest
Tue 5/66:45 amONT - BOI
1 stop3h 25mSouthwest
Deal found 2/19$212
This Alaska Airlines deal was found by Cheapflights users on 2/19. 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.
Tue 4/16:00 amBOI - ONT
1 stop4h 28mAlaska Airlines
Mon 4/76:00 amONT - BOI
1 stop6h 52mAlaska Airlines
Deal found 2/19$216
This Delta deal was found by Cheapflights users on 2/20. 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.
Wed 3/2610:50 amBOI - ONT
1 stop6h 52mDelta
Tue 4/15:15 pmONT - BOI
1 stop5h 58mDelta
Deal found 2/20$217
This Alaska Airlines deal was found by Cheapflights users on 2/19. 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.
Sat 4/196:19 pmGEG - ONT
1 stop5h 40mAlaska Airlines
Wed 4/234:29 pmONT - GEG
1 stop6h 35mAlaska Airlines
Deal found 2/19$220
This Delta deal was found by Cheapflights users on 2/20. 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.
Sat 3/157:26 amGEG - ONT
1 stop5h 03mDelta
Tue 3/185:30 pmONT - GEG
1 stop5h 19mDelta
Deal found 2/20$221
This Delta deal was found by Cheapflights users on 2/20. 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.
Thu 3/137:05 amJAC - ONT
1 stop6h 24mDelta
Tue 3/186:00 amONT - JAC
1 stop5h 30mDelta
Deal found 2/20$247
This Hawaiian Airlines deal was found by Cheapflights users on 2/20. 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 Hawaiian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/285:49 pmGEG - ONT
1 stop6h 10mHawaiian Airlines
Fri 5/26:24 pmONT - GEG
1 stop4h 40mHawaiian Airlines
Deal found 2/20$248
This Delta deal was found by Cheapflights users on 2/19. 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.
Fri 3/146:55 pmIDA - ONT
1 stop6h 01mDelta
Sat 3/156:00 amONT - IDA
1 stop5h 18mDelta
Deal found 2/19$257
This Southwest deal was found by Cheapflights users on 2/20. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/174:55 pmGEG - ONT
1 stop5h 05mSouthwest
Sun 4/209:30 pmONT - GEG
1 stop11h 35mSouthwest
Deal found 2/20$285
This Hawaiian Airlines deal was found by Cheapflights users on 2/19. 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 Hawaiian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/175:00 pmBOI - ONT
1 stop7h 24mHawaiian Airlines
Tue 3/186:00 amONT - BOI
1 stop6h 51mHawaiian Airlines
Deal found 2/19$290
This Delta deal was found by Cheapflights users on 2/20. 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 5/67:10 amLWS - ONT
1 stop6h 45mDelta
Mon 5/262:00 pmONT - LWS
1 stop7h 03mDelta
Deal found 2/20$303
This Alaska Airlines deal was found by Cheapflights users on 2/19. 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 3/124:07 pmIDA - ONT
1 stop6h 20mAlaska Airlines
Thu 3/136:00 amONT - IDA
1 stop15h 36mAlaska Airlines
Deal found 2/19$309

Find flights from Idaho to Ontario within your budget

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 February 20, 2025.

Fly from

Idaho

Fly to

Ontario

Route

Depart

Return

Price

BoiseOntario

BOI - ONT

BOIONT

Boise Air Term. Gowen Fld

Thu 5/1

6:10 am-11:00 am

1 stop5h 50m

Ontario

Tue 5/6

6:45 am-11:10 am

1 stop3h 25m

$212

BoiseOntario

BOI - ONT

BOIONT

Boise Air Term. Gowen Fld

Tue 4/1

6:00 am-9:28 am

1 stop4h 28m

Ontario

Mon 4/7

6:00 am-1:52 pm

1 stop6h 52m

$216

BoiseOntario

BOI - ONT

BOIONT

Boise Air Term. Gowen Fld

Wed 3/26

10:50 am-4:42 pm

1 stop6h 52m

Ontario

Tue 4/1

5:15 pm-12:13 am

1 stop5h 58m

$217

SpokaneOntario

GEG - ONT

GEGONT

Spokane

Sat 4/19

6:19 pm-11:59 pm

1 stop5h 40m

Ontario

Wed 4/23

4:29 pm-11:04 pm

1 stop6h 35m

$220

SpokaneOntario

GEG - ONT

GEGONT

Spokane

Sat 3/15

7:26 am-12:29 pm

1 stop5h 03m

Ontario

Tue 3/18

5:30 pm-10:49 pm

1 stop5h 19m

$221

JacksonOntario

JAC - ONT

JACONT

Jackson Hole

Thu 3/13

7:05 am-12:29 pm

1 stop6h 24m

Ontario

Tue 3/18

6:00 am-12:30 pm

1 stop5h 30m

$247

SpokaneOntario

GEG - ONT

GEGONT

Spokane

Mon 4/28

5:49 pm-11:59 pm

1 stop6h 10m

Ontario

Fri 5/2

6:24 pm-11:04 pm

1 stop4h 40m

$248

BoiseOntario

BOI - ONT

BOIONT

Boise Air Term. Gowen Fld

Sat 3/8

2:46 pm-8:17 pm

1 stop6h 31m

Ontario

Tue 3/11

6:00 am-1:51 pm

1 stop6h 51m

$257

Idaho FallsOntario

IDA - ONT

IDAONT

Idaho Falls Fanning Field

Fri 3/14

6:55 pm-11:56 pm

1 stop6h 01m

Ontario

Sat 3/15

6:00 am-12:18 pm

1 stop5h 18m

$257

SpokaneOntario

GEG - ONT

GEGONT

Spokane

Thu 4/17

4:55 pm-10:00 pm

1 stop5h 05m

Ontario

Sun 4/20

9:30 pm-9:05 am

1 stop11h 35m

$285

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/18

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.

Travel insights for flights from Idaho to Ontario

Get recent, data-driven insights about flights from Idaho to Ontario including ideal travel times, pricing trends, and more.

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 $315). 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 February 20, 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 February 20, 2025.
Peruse reviews from past customers who have flown with Southwest, Alaska Airlines 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.
Southwest
8.1
Very good
4,411 reviews

Crew

8.7

Overall

8.1

Boarding

8.2

Entertainment

7.6

Food

7.1

Comfort

8.1

Reviews

1 / 20

8.0
Excellent

Christine,Aug 2024

DEN - LGB

No issues. I needed pre boarding and I was able to get it without issue

Southwest
8.1
Very good
4,411 reviews
Southwest
8.1
Very good
4,411 reviews

Crew

8.7

Overall

8.1

Boarding

8.2

Entertainment

7.6

Food

7.1

Comfort

8.1

Reviews

1 / 20

8.0
Excellent

Christine,Aug 2024

DEN - LGB

No issues. I needed pre boarding and I was able to get it without issue

Alaska Airlines
8.0
Very good
9,697 reviews
Southwest
8.1
Very good
4,411 reviews

Crew

8.7

Overall

8.1

Boarding

8.2

Entertainment

7.6

Food

7.1

Comfort

8.1

Reviews

1 / 20

8.0
Excellent

Christine,Aug 2024

DEN - LGB

No issues. I needed pre boarding and I was able to get it without issue

Delta
8.0
Very good
8,219 reviews
Southwest
8.1
Very good
4,411 reviews

Crew

8.7

Overall

8.1

Boarding

8.2

Entertainment

7.6

Food

7.1

Comfort

8.1

Reviews

1 / 20

8.0
Excellent

Christine,Aug 2024

DEN - LGB

No issues. I needed pre boarding and I was able to get it without issue

Hawaiian Airlines
7.9
Good
2,317 reviews
Southwest
8.1
Very good
4,411 reviews

Crew

8.7

Overall

8.1

Boarding

8.2

Entertainment

7.6

Food

7.1

Comfort

8.1

Reviews

1 / 20

8.0
Excellent

Christine,Aug 2024

DEN - LGB

No issues. I needed pre boarding and I was able to get it without issue

United Airlines
7.4
Good
8,765 reviews
Southwest
8.1
Very good
4,411 reviews

Crew

8.7

Overall

8.1

Boarding

8.2

Entertainment

7.6

Food

7.1

Comfort

8.1

Reviews

1 / 20

8.0
Excellent

Christine,Aug 2024

DEN - LGB

No issues. I needed pre boarding and I was able to get it without issue

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 $65. 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 $315). 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 5 airlines flying from Idaho to Ontario

Discover the top 5 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 February 20, 2025.
AirlineCheapestAverageFlexibilityOn-time
Allegiant AirCheapest$128Average$136FlexibilityNo cancel feeOn-time88%
DeltaCheapest$132Average$426FlexibilityNo cancel feeOn-timeN/A
Alaska AirlinesCheapest$201Average$329FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$232Average$470FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$240Average$354FlexibilityNo cancel feeOn-time63%
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