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Idaho

$108+ 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 5/12. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — BOI
Mar 31 — Apr 71
Mon 3/31
Mon 4/7
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 March 26, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$216
(Hawaiian Airlines)

One-way from

$108
(Hawaiian Airlines)

Popular in

December

Cheapest in

October

Average price

$337
Provider with most accurate pricing for Los Angeles-Boise Air Term. Gowen Fld flight deals.
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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. 14% potential increase in price ($44 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 March 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 March 26, 2025.

This Hawaiian Airlines deal was found by Cheapflights users on 3/24. 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 5/126:24 pmONT - GEG
1 stop4h 40mHawaiian Airlines
Tue 5/205:49 pmGEG - ONT
1 stop4h 57mHawaiian Airlines
Deal found 3/24$216
This Delta deal was found by Cheapflights users on 3/24. 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 4/175:45 amONT - GEG
1 stop4h 50mDelta
Wed 4/235:30 amGEG - ONT
1 stop6h 46mDelta
Deal found 3/24$217
This Alaska Airlines deal was found by Cheapflights users on 3/25. 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 5/217:20 pmONT - GEG
1 stop4h 34mAlaska Airlines
Sun 5/253:02 pmGEG - ONT
1 stop7h 44mAlaska Airlines
Deal found 3/25$218
This Southwest deal was found by Cheapflights users on 3/23. 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 6/183:50 pmONT - GEG
1 stop6h 30mSouthwest
Wed 6/255:20 pmGEG - ONT
1 stop4h 25mSouthwest
Deal found 3/23$221
This Alaska Airlines deal was found by Cheapflights users on 3/24. 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 5/1411:46 amONT - BOI
1 stop5h 15mAlaska Airlines
Wed 5/148:27 pmBOI - ONT
1 stop4h 31mAlaska Airlines
Deal found 3/24$233
This Southwest deal was found by Cheapflights users on 3/26. 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 4/296:45 amONT - BOI
1 stop3h 25mSouthwest
Tue 5/612:30 pmBOI - ONT
1 stop3h 25mSouthwest
Deal found 3/26$234
This CheapOair deal was found by Cheapflights users on 3/25. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/1412:59 amONT - BOI
1 stop11h 38mFrontier
Sun 5/182:27 pmBOI - ONT
1 stop10h 32mFrontier
Deal found 3/25$236
This Delta deal was found by Cheapflights users on 3/24. 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.
Mon 4/215:45 amONT - BOI
1 stop6h 55mDelta
Wed 4/235:59 pmBOI - ONT
1 stop6h 42mDelta
Deal found 3/24$239
This Delta deal was found by Cheapflights users on 3/24. 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 5/136:00 amONT - JAC
1 stop3h 43mDelta
Wed 5/147:30 amJAC - ONT
1 stop5h 45mDelta
Deal found 3/24$265
This Hawaiian Airlines deal was found by Cheapflights users on 3/25. 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 5/14:29 pmONT - BOI
1 stop5h 10mHawaiian Airlines
Sun 5/46:30 amBOI - ONT
1 stop5h 21mHawaiian Airlines
Deal found 3/25$269
This American Airlines deal was found by Cheapflights users on 3/25. 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 5/296:01 amONT - BOI
1 stop6h 19mAmerican Airlines
Sun 6/15:10 pmBOI - ONT
1 stop5h 47mAmerican Airlines
Deal found 3/25$270
This United Airlines deal was found by Cheapflights users on 3/25. 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.
Sun 7/135:05 amONT - WYS
1 stop7h 15mUnited Airlines
Thu 7/172:02 pmWYS - ONT
1 stop7h 52mUnited Airlines
Deal found 3/25$296

Cheapflights Fare Finder

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 March 26, 2025.
Use the filters below to find and compare flights from Ontario to Idaho that are best for you.

Fly from

Ontario

Fly to

Idaho

Route

Depart

Return

Price

OntarioSpokane

ONT - GEG

ONTGEG

Ontario

Mon 5/12

6:24 pm-11:04 pm

1 stop4h 40m

Spokane

Tue 5/20

5:49 pm-10:46 pm

1 stop4h 57m

$216

OntarioSpokane

ONT - GEG

ONTGEG

Ontario

Thu 4/17

5:45 am-10:35 am

1 stop4h 50m

Spokane

Wed 4/23

5:30 am-12:16 pm

1 stop6h 46m

$217

OntarioSpokane

ONT - GEG

ONTGEG

Ontario

Wed 5/21

7:20 pm-11:54 pm

1 stop4h 34m

Spokane

Sun 5/25

3:02 pm-10:46 pm

1 stop7h 44m

$218

OntarioSpokane

ONT - GEG

ONTGEG

Ontario

Wed 6/18

3:50 pm-10:20 pm

1 stop6h 30m

Spokane

Wed 6/25

5:20 pm-9:45 pm

1 stop4h 25m

$221

OntarioBoise

ONT - BOI

ONTBOI

Ontario

Wed 5/14

11:46 am-6:01 pm

1 stop5h 15m

Boise Air Term. Gowen Fld

Wed 5/14

8:27 pm-11:58 pm

1 stop4h 31m

$233

OntarioBoise

ONT - BOI

ONTBOI

Ontario

Tue 4/29

6:45 am-11:10 am

1 stop3h 25m

Boise Air Term. Gowen Fld

Tue 5/6

12:30 pm-2:55 pm

1 stop3h 25m

$234

OntarioBoise

ONT - BOI

ONTBOI

Ontario

Wed 5/14

12:59 am-1:37 pm

1 stop11h 38m

Boise Air Term. Gowen Fld

Sun 5/18

2:27 pm-11:59 pm

1 stop10h 32m

$236

OntarioBoise

ONT - BOI

ONTBOI

Ontario

Mon 4/21

5:45 am-1:40 pm

1 stop6h 55m

Boise Air Term. Gowen Fld

Wed 4/23

5:59 pm-11:41 pm

1 stop6h 42m

$239

OntarioIdaho Falls

ONT - IDA

ONTIDA

Ontario

Tue 5/6

5:15 pm-10:56 pm

1 stop4h 41m

Idaho Falls Fanning Field

Wed 5/7

6:50 pm-11:42 pm

1 stop5h 52m

$265

OntarioBoise

ONT - BOI

ONTBOI

Ontario

Thu 5/1

4:29 pm-10:39 pm

1 stop5h 10m

Boise Air Term. Gowen Fld

Sun 5/4

6:30 am-10:51 am

1 stop5h 21m

$269

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/25

Showing 1-10 of 57 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.

Cheapflights Insights

Everything you need to know about your flight from Ontario to Idaho

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 $421). 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 March 26, 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 March 26, 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
4,274 reviews

Overall

8.1

Boarding

8.2

Comfort

8.1

Entertainment

7.6

Food

7.1

Crew

8.6

Reviews

1 / 20
10.0
Excellent

Merlyn,Feb 2025

LAX - SMF

New Terminal is neat, lost of stores and places to catch a bite.
Southwest
8.1
Very good
4,274 reviews
Southwest
8.1
Very good
4,274 reviews

Overall

8.1

Boarding

8.2

Comfort

8.1

Entertainment

7.6

Food

7.1

Crew

8.6

Reviews

1 / 20
10.0
Excellent

Merlyn,Feb 2025

LAX - SMF

New Terminal is neat, lost of stores and places to catch a bite.
Alaska Airlines
8.0
Very good
9,789 reviews
Southwest
8.1
Very good
4,274 reviews

Overall

8.1

Boarding

8.2

Comfort

8.1

Entertainment

7.6

Food

7.1

Crew

8.6

Reviews

1 / 20
10.0
Excellent

Merlyn,Feb 2025

LAX - SMF

New Terminal is neat, lost of stores and places to catch a bite.
Delta
8.0
Very good
7,891 reviews
Southwest
8.1
Very good
4,274 reviews

Overall

8.1

Boarding

8.2

Comfort

8.1

Entertainment

7.6

Food

7.1

Crew

8.6

Reviews

1 / 20
10.0
Excellent

Merlyn,Feb 2025

LAX - SMF

New Terminal is neat, lost of stores and places to catch a bite.
Hawaiian Airlines
7.9
Good
2,330 reviews
Southwest
8.1
Very good
4,274 reviews

Overall

8.1

Boarding

8.2

Comfort

8.1

Entertainment

7.6

Food

7.1

Crew

8.6

Reviews

1 / 20
10.0
Excellent

Merlyn,Feb 2025

LAX - SMF

New Terminal is neat, lost of stores and places to catch a bite.
United Airlines
7.4
Good
8,608 reviews
Southwest
8.1
Very good
4,274 reviews

Overall

8.1

Boarding

8.2

Comfort

8.1

Entertainment

7.6

Food

7.1

Crew

8.6

Reviews

1 / 20
10.0
Excellent

Merlyn,Feb 2025

LAX - SMF

New Terminal is neat, lost of stores and places to catch a bite.

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 Hawaiian Airlines ($108), Delta ($111), and Alaska Airlines ($119).

  • 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 $421). 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

See prices for flight routes from nearby airports that may be better suited for you.
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Top 5 airlines flying from Ontario to Idaho

Discover the top 5 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 March 26, 2025.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$108Average$149FlexibilityNo cancel feeOn-time65%
Alaska AirlinesCheapest$177Average$310FlexibilityNo cancel feeOn-time75%
DeltaCheapest$209Average$442FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$238Average$377FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$240Average$346FlexibilityNo cancel feeOn-time63%
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