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$56+ 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 5/19. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — BOI
Feb 25 — Mar 41
Tue 2/25
Tue 3/4
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 February 20, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$217
(Delta)

One-way from

$56
(Frontier)

Popular in

December

Cheapest in

October

Average price

$277
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. 13% potential increase in price ($42 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($10 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 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 February 20, 2025.

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 3/265:30 pmONT - BOI
1 stop5h 16mDelta
Tue 4/110:50 amBOI - ONT
1 stop6h 52mDelta
Deal found 2/20$217
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 4/25:30 pmONT - GEG
1 stop6h 35mDelta
Wed 4/235:30 amGEG - ONT
1 stop6h 46mDelta
Deal found 2/20$221
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.
Wed 4/25:30 amONT - GEG
2 stops8h 15mSouthwest
Wed 4/234:50 pmGEG - ONT
1 stop5h 00mSouthwest
Deal found 2/20$226
This Alaska 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/267:00 amONT - GEG
1 stop4h 37mAlaska Airlines
Mon 4/288:03 amGEG - ONT
1 stop7h 29mAlaska Airlines
Deal found 2/20$230
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 4/127:00 amONT - BOI
1 stop5h 09mAlaska Airlines
Mon 4/146:18 pmBOI - ONT
1 stop6h 41mAlaska Airlines
Deal found 2/19$234
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.
Fri 4/181:20 pmONT - JAC
1 stop4h 38mDelta
Tue 4/221:23 pmJAC - ONT
1 stop4h 10mDelta
Deal found 2/20$247
This Southwest deal was found by Cheapflights users on 2/18. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/312:20 pmONT - BOI
2 stops8h 25mSouthwest
Wed 5/74:40 pmBOI - ONT
1 stop6h 50mSouthwest
Deal found 2/18$250
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.
Thu 4/35:44 pmONT - GEG
1 stop5h 19mHawaiian Airlines
Mon 4/75:48 pmGEG - ONT
1 stop6h 11mHawaiian Airlines
Deal found 2/20$269
This United 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/26:41 pmONT - GEG
1 stop4h 23mUnited Airlines
Thu 6/53:29 pmGEG - ONT
1 stop7h 16mUnited Airlines
Deal found 2/20$282
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 3/136:00 amONT - IDA
1 stop5h 18mDelta
Sun 3/166:55 pmIDA - ONT
1 stop6h 01mDelta
Deal found 2/20$288
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 3/225:40 amONT - SUN
1 stop6h 25mDelta
Sat 3/291:45 pmSUN - ONT
2 stops9h 02mDelta
Deal found 2/20$293
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 3/226:00 amONT - LWS
1 stop5h 49mDelta
Sat 3/2912:30 pmLWS - ONT
1 stop4h 04mDelta
Deal found 2/20$303

Find flights from Ontario to Idaho within your budget

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 February 20, 2025.

Fly from

Ontario

Fly to

Idaho

Route

Depart

Return

Price

OntarioBoise

ONT - BOI

ONTBOI

Ontario

Wed 3/26

5:30 pm-11:46 pm

1 stop5h 16m

Boise Air Term. Gowen Fld

Tue 4/1

10:50 am-4:42 pm

1 stop6h 52m

$217

OntarioSpokane

ONT - GEG

ONTGEG

Ontario

Wed 4/2

5:30 pm-12:05 am

1 stop6h 35m

Spokane

Wed 4/23

5:30 am-12:16 pm

1 stop6h 46m

$221

OntarioSpokane

ONT - GEG

ONTGEG

Ontario

Wed 4/2

5:30 am-1:45 pm

2 stops8h 15m

Spokane

Wed 4/23

4:50 pm-9:50 pm

1 stop5h 00m

$226

OntarioSpokane

ONT - GEG

ONTGEG

Ontario

Sat 4/26

7:00 am-11:37 am

1 stop4h 37m

Spokane

Mon 4/28

6:00 am-10:51 am

1 stop4h 51m

$230

OntarioBoise

ONT - BOI

ONTBOI

Ontario

Sat 4/12

7:00 am-1:09 pm

1 stop5h 09m

Boise Air Term. Gowen Fld

Mon 4/14

6:18 pm-11:59 pm

1 stop6h 41m

$234

OntarioSpokane

ONT - GEG

ONTGEG

Ontario

Tue 4/8

5:44 pm-11:03 pm

1 stop5h 19m

Spokane

Fri 4/11

9:41 pm-9:28 am

1 stop11h 47m

$238

OntarioJackson

ONT - JAC

ONTJAC

Ontario

Fri 4/18

1:20 pm-6:58 pm

1 stop4h 38m

Jackson Hole

Tue 4/22

1:23 pm-4:33 pm

1 stop4h 10m

$247

OntarioBoise

ONT - BOI

ONTBOI

Ontario

Sat 5/3

12:20 pm-9:45 pm

2 stops8h 25m

Boise Air Term. Gowen Fld

Wed 5/7

4:40 pm-10:30 pm

1 stop6h 50m

$250

OntarioSpokane

ONT - GEG

ONTGEG

Ontario

Mon 6/2

6:41 pm-11:04 pm

1 stop4h 23m

Spokane

Thu 6/5

3:29 pm-10:45 pm

1 stop7h 16m

$282

OntarioIdaho Falls

ONT - IDA

ONTIDA

Ontario

Thu 3/13

6:00 am-12:18 pm

1 stop5h 18m

Idaho Falls Fanning Field

Sun 3/16

6:55 pm-11:56 pm

1 stop6h 01m

$288

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/18

Showing 1-10 of 53 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.

Travel insights for flights from Ontario to Idaho

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

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

Currently, October is the cheapest month in which you can book a flight from Ontario to Idaho (average of $314). Flying from Ontario to Idaho in June is currently the most expensive (average of $436). 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 February 20, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Ontario to Idaho as you normally would.

Rainfall in Idaho by month

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

In terms of precipitation, rainfall in Idaho ranges from 0.2 - 1.6 inches per month. December is typically the wettest month, when rainfall can reach 1.6 in. August is typically the driest time to visit Idaho when rainfall is around 0.2 in.

Temperature in Idaho by month

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

If weather is an important factor for your trip to Idaho, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 75.2 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 30.2 F).

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 February 20, 2025.
Read through reviews of airlines operating flights from Ontario to Idaho, such as Southwest, Alaska Airlines and Delta. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.1
Very good
4,411 reviews

Comfort

8.1

Overall

8.1

Crew

8.7

Food

7.1

Boarding

8.2

Entertainment

7.6

Reviews

1 / 20

10.0
Excellent

Tim,Jul 2024

DEN - SEA

Sheila did great! First time I have ever seen all three people in an exit row get out and read the safety information card AFTER the briefing. I like the boarding process. It seems a shame to UN-differentiate SW because of abuse of the early boarding process.

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

Comfort

8.1

Overall

8.1

Crew

8.7

Food

7.1

Boarding

8.2

Entertainment

7.6

Reviews

1 / 20

10.0
Excellent

Tim,Jul 2024

DEN - SEA

Sheila did great! First time I have ever seen all three people in an exit row get out and read the safety information card AFTER the briefing. I like the boarding process. It seems a shame to UN-differentiate SW because of abuse of the early boarding process.

Alaska Airlines
8.0
Very good
9,692 reviews
Southwest
8.1
Very good
4,411 reviews

Comfort

8.1

Overall

8.1

Crew

8.7

Food

7.1

Boarding

8.2

Entertainment

7.6

Reviews

1 / 20

10.0
Excellent

Tim,Jul 2024

DEN - SEA

Sheila did great! First time I have ever seen all three people in an exit row get out and read the safety information card AFTER the briefing. I like the boarding process. It seems a shame to UN-differentiate SW because of abuse of the early boarding process.

Delta
8.0
Very good
8,220 reviews
Southwest
8.1
Very good
4,411 reviews

Comfort

8.1

Overall

8.1

Crew

8.7

Food

7.1

Boarding

8.2

Entertainment

7.6

Reviews

1 / 20

10.0
Excellent

Tim,Jul 2024

DEN - SEA

Sheila did great! First time I have ever seen all three people in an exit row get out and read the safety information card AFTER the briefing. I like the boarding process. It seems a shame to UN-differentiate SW because of abuse of the early boarding process.

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

Comfort

8.1

Overall

8.1

Crew

8.7

Food

7.1

Boarding

8.2

Entertainment

7.6

Reviews

1 / 20

10.0
Excellent

Tim,Jul 2024

DEN - SEA

Sheila did great! First time I have ever seen all three people in an exit row get out and read the safety information card AFTER the briefing. I like the boarding process. It seems a shame to UN-differentiate SW because of abuse of the early boarding process.

United Airlines
7.4
Good
8,766 reviews
Southwest
8.1
Very good
4,411 reviews

Comfort

8.1

Overall

8.1

Crew

8.7

Food

7.1

Boarding

8.2

Entertainment

7.6

Reviews

1 / 20

10.0
Excellent

Tim,Jul 2024

DEN - SEA

Sheila did great! First time I have ever seen all three people in an exit row get out and read the safety information card AFTER the briefing. I like the boarding process. It seems a shame to UN-differentiate SW because of abuse of the early boarding process.

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.

  • 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 Frontier ($56), Alaska Airlines ($108), and Delta ($109).

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

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

  • 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, October is the cheapest month in which you can book a flight from Ontario to Idaho (average of $314). Flying from Ontario to Idaho in June is currently the most expensive (average of $436). 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 Ontario to Idaho

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Top 6 airlines flying from Ontario to Idaho

Discover the top 6 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 February 20, 2025.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$121Average$154FlexibilityNo cancel feeOn-time65%
Alaska AirlinesCheapest$177Average$312FlexibilityNo cancel feeOn-time75%
American AirlinesCheapest$218Average$396FlexibilityNo cancel feeOn-time71%
DeltaCheapest$218Average$472FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$238Average$380FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$240Average$348FlexibilityNo cancel feeOn-time63%
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