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$116+ 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 2/11. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — BOI
Jan 22 — Jan 291
Wed 1/22
Wed 1/29
1 adult, Economy
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Cheap flight deals from Ontario to Idaho

Discover tips and strategies to find the most affordable flight options for your journey from Ontario (ONT) to Idaho (USID). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated January 17, 2025.

Round-trip from

$233
(Delta)

One-way from

$116
(Alaska Airlines)
From Ontario to Idaho
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One-way flight from Ontario to Idaho
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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 January 17, 2025.

This Alaska Airlines deal was found by Cheapflights users on 1/15. 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 2/256:00 amONT - BOI
1 stop6h 51mAlaska Airlines
Wed 2/262:46 pmBOI - ONT
1 stop7h 41mAlaska Airlines
Deal found 1/15$232
This Delta deal was found by Cheapflights users on 1/15. 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 2/124:05 pmONT - BOI
1 stop6h 41mDelta
Tue 2/181:20 pmBOI - ONT
1 stop4h 08mDelta
Deal found 1/15$233
This Delta deal was found by Cheapflights users on 1/16. 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 6/46:00 amONT - WYS
1 stop5h 12mDelta
Tue 6/1012:53 pmWYS - ONT
1 stop4h 24mDelta
Deal found 1/16$234
This Delta deal was found by Cheapflights users on 1/16. 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 3/181:20 pmONT - IDA
1 stop3h 53mDelta
Tue 3/256:55 pmIDA - ONT
1 stop5h 50mDelta
Deal found 1/16$237
This Delta deal was found by Cheapflights users on 1/16. 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 4/156:00 amONT - JAC
1 stop5h 08mDelta
Sat 4/195:30 pmJAC - ONT
1 stop5h 25mDelta
Deal found 1/16$237
This Delta deal was found by Cheapflights users on 1/15. 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 2/115:10 pmONT - SUN
1 stop4h 29mDelta
Sat 2/157:15 amSUN - ONT
1 stop6h 09mDelta
Deal found 1/15$237
This Delta deal was found by Cheapflights users on 1/14. 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 2/44:05 pmONT - GEG
1 stop6h 47mDelta
Mon 2/105:05 pmGEG - ONT
1 stop6h 46mDelta
Deal found 1/14$240
This United Airlines deal was found by Cheapflights users on 1/15. 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.
Wed 2/125:10 amONT - GEG
1 stop7h 38mUnited Airlines
Wed 2/191:46 pmGEG - ONT
1 stop7h 06mUnited Airlines
Deal found 1/15$241
This Alaska Airlines deal was found by Cheapflights users on 1/16. 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 4/288:40 pmGEG - ONT
1 stop14h 11mAlaska Airlines
Deal found 1/16$250
This United Airlines deal was found by Cheapflights users on 1/15. 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.
Wed 1/2910:47 amONT - BOI
1 stop4h 40mUnited Airlines
Thu 1/301:01 pmBOI - ONT
1 stop5h 56mUnited Airlines
Deal found 1/15$261
This American Airlines deal was found by Cheapflights users on 1/15. 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.
Wed 1/296:10 amONT - GEG
1 stop7h 39mAmerican Airlines
Mon 2/36:32 amGEG - ONT
1 stop5h 26mAmerican Airlines
Deal found 1/15$283
This Southwest deal was found by Cheapflights users on 1/16. 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.
Fri 2/145:50 amONT - GEG
2 stops7h 30mSouthwest
Tue 2/181:55 pmGEG - ONT
1 stop9h 10mSouthwest
Deal found 1/16$297

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 January 17, 2025.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

OntarioBoise

ONT - BOI

ONTBOI

Ontario

Tue 2/25

6:00 am-1:51 pm

1 stop6h 51m

Boise Air Term. Gowen Fld

Wed 2/26

2:46 pm-9:27 pm

1 stop7h 41m

$232

OntarioBoise

ONT - BOI

ONTBOI

Ontario

Wed 2/12

4:05 pm-11:46 pm

1 stop6h 41m

Boise Air Term. Gowen Fld

Tue 2/18

1:20 pm-4:28 pm

1 stop4h 08m

$233

OntarioIdaho Falls

ONT - IDA

ONTIDA

Ontario

Tue 3/18

1:20 pm-6:13 pm

1 stop3h 53m

Idaho Falls Fanning Field

Tue 3/25

6:55 pm-11:45 pm

1 stop5h 50m

$237

OntarioJackson

ONT - JAC

ONTJAC

Ontario

Sat 2/15

1:21 pm-7:02 pm

1 stop4h 41m

Jackson Hole

Tue 2/18

5:35 pm-11:51 pm

1 stop7h 16m

$237

OntarioHailey

ONT - SUN

ONTSUN

Ontario

Tue 2/11

5:10 pm-10:39 pm

1 stop4h 29m

Hailey Sun Valley-Friedman

Sat 2/15

7:15 am-12:24 pm

1 stop6h 09m

$237

OntarioSpokane

ONT - GEG

ONTGEG

Ontario

Tue 2/4

4:05 pm-10:52 pm

1 stop6h 47m

Spokane

Mon 2/10

5:05 pm-11:51 pm

1 stop6h 46m

$240

OntarioSpokane

ONT - GEG

ONTGEG

Ontario

Wed 2/12

5:10 am-12:48 pm

1 stop7h 38m

Spokane

Wed 2/19

1:46 pm-8:52 pm

1 stop7h 06m

$241

OntarioSpokane

ONT - GEG

ONTGEG

Ontario

Thu 2/6

4:06 pm-11:53 pm

1 stop7h 47m

Spokane

Mon 2/10

5:48 pm-10:39 pm

1 stop4h 51m

$260

OntarioBoise

ONT - BOI

ONTBOI

Ontario

Wed 1/29

10:47 am-4:27 pm

1 stop4h 40m

Boise Air Term. Gowen Fld

Thu 1/30

1:01 pm-5:57 pm

1 stop5h 56m

$261

OntarioSpokane

ONT - GEG

ONTGEG

Ontario

Wed 1/29

6:10 am-1:49 pm

1 stop7h 39m

Spokane

Mon 2/3

6:32 am-11:58 am

1 stop5h 26m

$283

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/16

Showing 1-10 of 43 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 January 17, 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 January 17, 2025.
Read through reviews of airlines operating flights from Ontario to Idaho, such as Delta, Alaska Airlines and Southwest. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.1
Very good
4,659 reviews

Boarding

8.2

Crew

8.7

Overall

8.1

Comfort

8.1

Entertainment

7.7

Food

7.2

Reviews

1 / 10

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
4,659 reviews
Southwest
8.1
Very good
4,659 reviews

Boarding

8.2

Crew

8.7

Overall

8.1

Comfort

8.1

Entertainment

7.7

Food

7.2

Reviews

1 / 10

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
9,681 reviews
Southwest
8.1
Very good
4,659 reviews

Boarding

8.2

Crew

8.7

Overall

8.1

Comfort

8.1

Entertainment

7.7

Food

7.2

Reviews

1 / 10

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
8,511 reviews
Southwest
8.1
Very good
4,659 reviews

Boarding

8.2

Crew

8.7

Overall

8.1

Comfort

8.1

Entertainment

7.7

Food

7.2

Reviews

1 / 10

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
8,964 reviews
Southwest
8.1
Very good
4,659 reviews

Boarding

8.2

Crew

8.7

Overall

8.1

Comfort

8.1

Entertainment

7.7

Food

7.2

Reviews

1 / 10

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.

American Airlines
7.2
Good
10,000 reviews
Southwest
8.1
Very good
4,659 reviews

Boarding

8.2

Crew

8.7

Overall

8.1

Comfort

8.1

Entertainment

7.7

Food

7.2

Reviews

1 / 10

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 Alaska Airlines ($116), Delta ($117), and United Airlines ($145).

  • 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

See prices for flight routes from nearby airports that may be better suited for you.
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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 January 17, 2025.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$121Average$154FlexibilityNo cancel feeOn-time65%
Alaska AirlinesCheapest$196Average$333FlexibilityNo cancel feeOn-time75%
DeltaCheapest$218Average$449FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$218Average$396FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$238Average$404FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$240Average$366FlexibilityNo cancel feeOn-time63%
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