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Idaho Falls

$156+ Cheap flights from Ontario to Idaho Falls (ONT - IDA)

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 11/12. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — IDA
Oct 11 — Oct 181
Sat 10/11
Sat 10/18
1 adult, Economy
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Cheap flight deals from Ontario to Idaho Falls

Discover tips and strategies to find the most affordable flight options for your journey from Ontario (ONT) to Idaho Falls (IDA). 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 September 11, 2025.

Round-trip from

$260
(Kiwi.com)

One-way from

$156
(Alaska Airlines)

Popular in

March

Cheapest in

July

Average price

$314
From Ontario to Idaho Falls Fanning Field
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One-way flight from Ontario to Idaho Falls Fanning Field
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Highest demand for flights based on searches. 27% potential increase in price ($162 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($18 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Find flight deals from Ontario to Idaho Falls

Cheapest flights from Ontario to Idaho Falls
Explore the most affordable flight options available from Ontario to Idaho Falls. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 11, 2025.

This Kiwi.com deal was found by Cheapflights users on 9/10. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/257:30 pmONT - IDA
1 stop19h 35mMultiple Airlines
Mon 9/299:39 pmIDA - ONT
1 stop25h 17mMultiple Airlines
Deal found 9/10$260
This Alaska Airlines deal was found by Cheapflights users on 9/11. 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 10/211:31 pmONT - IDA
1 stop8h 07mAlaska Airlines
Sat 10/256:00 amIDA - ONT
1 stop7h 37mAlaska Airlines
Deal found 9/11$322
This Hawaiian Airlines deal was found by Cheapflights users on 9/11. 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.
Tue 10/71:31 pmONT - IDA
1 stop8h 07mHawaiian Airlines
Tue 10/146:00 amIDA - ONT
1 stop7h 37mHawaiian Airlines
Deal found 9/11$377
This Hawaiian Airlines deal was found by Cheapflights users on 9/11. 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 10/241:31 pmONT - IDA
1 stop8h 07mHawaiian Airlines
Sun 10/266:05 amIDA - ONT
1 stop6h 00mHawaiian Airlines
Deal found 9/11$387
This Hawaiian Airlines deal was found by Cheapflights users on 9/11. 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.
Thu 10/231:31 pmONT - IDA
1 stop8h 07mHawaiian Airlines
Mon 10/273:50 pmIDA - ONT
1 stop6h 03mHawaiian Airlines
Deal found 9/11$412
This Alaska Airlines deal was found by Cheapflights users on 9/11. 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 10/77:10 amONT - IDA
2 stops14h 28mAlaska Airlines
Tue 10/146:00 amIDA - ONT
1 stop7h 37mAlaska Airlines
Deal found 9/11$422
This Alaska Airlines deal was found by Cheapflights users on 9/10. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/81:31 pmONT - IDA
1 stop8h 07mAlaska Airlines
Wed 10/154:15 pmIDA - ONT
1 stop8h 48mAlaska Airlines
Deal found 9/10$423
This Hawaiian Airlines deal was found by Cheapflights users on 9/10. 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 Hawaiian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/243:06 pmONT - IDA
1 stop6h 33mHawaiian Airlines
Sat 9/276:13 amIDA - ONT
1 stop5h 31mHawaiian Airlines
Deal found 9/10$430
This Alaska Airlines deal was found by Cheapflights users on 9/11. 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.
Fri 10/247:10 amONT - IDA
2 stops31h 28mAlaska Airlines
Sun 10/266:05 amIDA - ONT
1 stop6h 00mAlaska Airlines
Deal found 9/11$441
This Alaska Airlines deal was found by Cheapflights users on 9/11. 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.
Thu 10/237:10 amONT - IDA
2 stops14h 28mAlaska Airlines
Mon 10/273:50 pmIDA - ONT
1 stop6h 03mAlaska Airlines
Deal found 9/11$447

Cheapflights Fare Finder

 
Customize your flight search to find flights from Ontario to Idaho Falls 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 September 11, 2025.
Use the filters below to find and compare flights from Ontario to Idaho Falls that are best for you.

Fly from

Ontario

Fly to

Idaho Falls

Route

Depart

Return

Price

OntarioIdaho Falls

ONT - IDA

ONTIDA

Ontario

Thu 9/25

7:30 pm-4:05 pm

1 stop19h 35m

Idaho Falls Fanning Field

Mon 9/29

9:39 pm-7:54 pm

2 stops23h 15m

$316

OntarioIdaho Falls

ONT - IDA

ONTIDA

Ontario

Tue 10/21

1:31 pm-10:38 pm

1 stop8h 07m

Idaho Falls Fanning Field

Sat 10/25

6:00 am-12:37 pm

1 stop7h 37m

$322

OntarioIdaho Falls

ONT - IDA

ONTIDA

Ontario

Tue 10/7

1:31 pm-10:38 pm

1 stop8h 07m

Idaho Falls Fanning Field

Tue 10/14

6:00 am-12:37 pm

1 stop7h 37m

$377

OntarioIdaho Falls

ONT - IDA

ONTIDA

Ontario

Fri 10/24

1:31 pm-10:38 pm

1 stop8h 07m

Idaho Falls Fanning Field

Sun 10/26

6:05 am-11:05 am

1 stop6h 00m

$387

OntarioIdaho Falls

ONT - IDA

ONTIDA

Ontario

Thu 10/23

1:31 pm-10:38 pm

1 stop8h 07m

Idaho Falls Fanning Field

Mon 10/27

3:50 pm-8:53 pm

1 stop6h 03m

$412

OntarioIdaho Falls

ONT - IDA

ONTIDA

Ontario

Tue 10/7

7:10 am-10:38 pm

2 stops14h 28m

Idaho Falls Fanning Field

Tue 10/14

6:00 am-12:37 pm

1 stop7h 37m

$422

OntarioIdaho Falls

ONT - IDA

ONTIDA

Ontario

Wed 10/8

1:31 pm-10:38 pm

1 stop8h 07m

Idaho Falls Fanning Field

Wed 10/15

4:15 pm-12:03 am

1 stop8h 48m

$423

OntarioIdaho Falls

ONT - IDA

ONTIDA

Ontario

Wed 9/24

3:06 pm-10:39 pm

1 stop6h 33m

Idaho Falls Fanning Field

Sat 9/27

6:13 am-10:44 am

1 stop5h 31m

$430

OntarioIdaho Falls

ONT - IDA

ONTIDA

Ontario

Thu 10/23

7:10 am-10:38 pm

2 stops14h 28m

Idaho Falls Fanning Field

Mon 10/27

3:50 pm-8:53 pm

1 stop6h 03m

$447

OntarioIdaho Falls

ONT - IDA

ONTIDA

Ontario

Sun 10/5

1:15 pm-8:52 pm

1 stop6h 37m

Idaho Falls Fanning Field

Wed 10/8

2:35 pm-8:24 pm

1 stop6h 49m

$460

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/11

Showing 1-10 of 21 results
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Best time to book a flight from Ontario to Idaho Falls

Have a flexible travel schedule? Discover the best time to fly to Idaho Falls 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 Falls

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

Currently, October is the cheapest month in which you can book a flight from Ontario to Idaho Falls (average of $380). Flying from Ontario to Idaho Falls in December is currently the most expensive (average of $578). 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 IDA?

Find hourly flight availability from Ontario to Idaho Falls. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated September 11, 2025.

When flying from Ontario to Idaho Falls, the time of day you fly usually plays a role in the price. Save by searching for a flight in the morning, which can drop the price by up to 11% versus a flight in the afternoon.

Reviews of airlines servicing Idaho Falls

Get insights into the airlines that provide service to Idaho Falls. 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 Falls. Reviews last updated September 11, 2025.
Read reviews from past customers who have flown Delta from Ontario to Idaho Falls. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,960 reviews

Food

7.3

Boarding

8.2

Overall

8.0

Entertainment

7.9

Crew

8.5

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Michael,Sep 2023

SMF - ATL

Not sufficient leg room and three seats are very tigh.t on 737 in economy main cabin
Delta
8.0
Very good
7,960 reviews
Delta
8.0
Very good
7,960 reviews

Food

7.3

Boarding

8.2

Overall

8.0

Entertainment

7.9

Crew

8.5

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Michael,Sep 2023

SMF - ATL

Not sufficient leg room and three seats are very tigh.t on 737 in economy main cabin

Related info for your journey

Find useful and relevant information for your journey from Ontario to Idaho Falls. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Ontario to Idaho Falls?

    Alaska Airlines and Hawaiian Airlines can get you from Ontario to Idaho Falls in just under 8h 07m. Your travel time can differ by up to . There are 717 mi between Ontario and Idaho Falls.

  • What is the cheapest airline to fly from Ontario to Idaho Falls round-trip?

    Cheapflights users have booked flights from Ontario to Idaho Falls round-trip from $219. You may be able to fly from Ontario to Idaho Falls for 49% less than the average price by searching for this airline.

  • What are the cheapest airlines to fly from Ontario to Idaho Falls one-way?

    For one-way options, check prices for Alaska Airlines. According to our data, you can fly for as low as $156. Users have also found prices from $161 and $166 on Delta and Hawaiian Airlines, respectively.

  • Can I find deals for flights from Ontario to Idaho Falls that include hotel bookings?

    Yes. In addition to deals on Ontario to Idaho Falls flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Ontario to Idaho Falls?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ontario to Idaho Falls.

  • Can I find deals for business class flights from Ontario to Idaho Falls?

    Yes. Cheapflights offers flight deals from Ontario to Idaho Falls 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 Falls?

    Currently, October is the cheapest month in which you can book a flight from Ontario to Idaho Falls (average of $380). Flying from Ontario to Idaho Falls in December is currently the most expensive (average of $578). 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

Traveling to a place near Idaho Falls?

Book flights to Idaho Falls if you plan to visit one of these locations
Rexburg

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Top airline flying from Ontario to Idaho Falls

Discover the top airline that operate flights from Ontario to Idaho Falls. 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 September 11, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$219Average$392FlexibilityNo cancel feeOn-timeN/A

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