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Idaho Falls

$134+ 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 1/15. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — IDA
Jan 11 — Jan 181
Sun 1/11
Sun 1/18
1 adult, Economy
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Cheap 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 December 12, 2025.

This Kiwi.com deal was found by Cheapflights users on 12/10. 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 12/256:07 pmONT - IDA
1 stop21h 05mMultiple Airlines
Mon 12/2910:52 pmIDA - ONT
1 stop19h 30mMultiple Airlines
Deal found 12/10$378
This Kiwi.com deal was found by Cheapflights users on 12/10. 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.
Fri 12/196:00 amONT - IDA
1 stop7h 20mMultiple Airlines
Mon 12/229:20 pmIDA - ONT
1 stop21h 02mMultiple Airlines
Deal found 12/10$386
This Kiwi.com deal was found by Cheapflights users on 12/9. 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.
Sat 12/136:15 amONT - IDA
1 stop4h 44mMultiple Airlines
Mon 12/158:16 pmIDA - ONT
1 stop26h 01mMultiple Airlines
Deal found 12/9$422
This Delta deal was found by Cheapflights users on 12/10. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/205:10 pmONT - IDA
1 stop4h 42mDelta
Mon 12/296:57 pmIDA - ONT
1 stop5h 57mDelta
Deal found 12/10$546
This United Airlines deal was found by Cheapflights users on 12/10. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/195:05 amONT - IDA
1 stop7h 25mUnited Airlines
Mon 12/226:40 amIDA - ONT
1 stop6h 58mUnited Airlines
Deal found 12/10$566
This American Airlines deal was found by Cheapflights users on 12/10. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/194:44 pmONT - IDA
1 stop4h 37mAmerican Airlines
Mon 12/227:00 amIDA - ONT
1 stop5h 53mAmerican Airlines
Deal found 12/10$606
This American Airlines deal was found by Cheapflights users on 12/11. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/274:47 pmONT - IDA
1 stop4h 34mAmerican Airlines
Thu 1/17:00 amIDA - ONT
1 stop5h 53mAmerican Airlines
Deal found 12/11$626
This American Airlines deal was found by Cheapflights users on 12/10. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/286:20 amONT - IDA
1 stop15h 01mAmerican Airlines
Thu 1/17:00 amIDA - ONT
1 stop5h 53mAmerican Airlines
Deal found 12/10$647
This United Airlines deal was found by Cheapflights users on 12/10. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/265:05 amONT - IDA
1 stop7h 25mUnited Airlines
Tue 12/306:40 amIDA - ONT
1 stop6h 58mUnited Airlines
Deal found 12/10$661

Find 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 December 12, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$285
(Alaska Airlines)

One-way from

$134
(Alaska Airlines)

Popular in

March

Cheapest in

July

Average price

$450
Provider with most accurate pricing for Ontario-Idaho Falls Fanning Field flight deals.
Search Deals
Provider most trusted by Cheapflights users for Ontario-Idaho Falls Fanning Field flights.
Search Deals
From Ontario to Idaho Falls Fanning Field
Search Deals
One-way flight from Ontario to Idaho Falls Fanning Field
Search Deals
Highest demand for flights based on searches. 20% potential increase in price ($112 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($17 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals

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 December 12, 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 1/22

4:03 pm-10:59 pm

1 stop5h 56m

Idaho Falls Fanning Field

Mon 1/26

6:58 pm-8:36 pm

1 stop26h 38m

$285

OntarioIdaho Falls

ONT - IDA

ONTIDA

Ontario

Thu 1/8

11:53 am-6:18 pm

1 stop5h 25m

Idaho Falls Fanning Field

Thu 1/15

6:58 pm-11:56 pm

1 stop5h 58m

$293

OntarioIdaho Falls

ONT - IDA

ONTIDA

Ontario

Thu 12/25

6:07 pm-4:12 pm

1 stop21h 05m

Idaho Falls Fanning Field

Mon 12/29

10:52 pm-5:22 pm

1 stop19h 30m

$378

OntarioIdaho Falls

ONT - IDA

ONTIDA

Ontario

Fri 12/19

6:00 am-2:20 pm

1 stop7h 20m

Idaho Falls Fanning Field

Mon 12/22

9:20 pm-5:22 pm

1 stop21h 02m

$386

OntarioIdaho Falls

ONT - IDA

ONTIDA

Ontario

Sat 12/20

5:10 pm-10:52 pm

1 stop4h 42m

Idaho Falls Fanning Field

Mon 12/29

6:57 pm-11:54 pm

1 stop5h 57m

$546

OntarioIdaho Falls

ONT - IDA

ONTIDA

Ontario

Fri 12/19

5:05 am-1:30 pm

1 stop7h 25m

Idaho Falls Fanning Field

Mon 12/22

6:40 am-12:38 pm

1 stop6h 58m

$566

OntarioIdaho Falls

ONT - IDA

ONTIDA

Ontario

Tue 1/20

7:30 am-5:51 pm

2 stops9h 21m

$139

OntarioIdaho Falls

ONT - IDA

ONTIDA

Ontario

Wed 1/21

11:53 am-6:18 pm

1 stop5h 25m

$144

OntarioIdaho Falls

ONT - IDA

ONTIDA

Ontario

Tue 2/10

11:53 am-6:18 pm

1 stop5h 25m

$144

OntarioIdaho Falls

ONT - IDA

ONTIDA

Ontario

Sat 1/24

11:53 am-6:18 pm

1 stop5h 25m

$144

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/10

Showing 1-10 of 16 results
1
2

Compare providers for flights from Ontario to Idaho Falls

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Ontario to Idaho Falls in December.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
PricelinePrice Accuracy1 starTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Ontario-Idaho Falls flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Ontario-Idaho Falls flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from Ontario-Idaho Falls flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Ontario-Idaho Falls flights, Cheapflights users trust eDreams the most. eDreams has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Ontario-Idaho Falls flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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, November is the cheapest month in which you can book a flight from Ontario to Idaho Falls (average of $60). Flying from Ontario to Idaho Falls in December is currently the most expensive (average of $228). 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 December 12, 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 20% versus a flight in the evening.

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 December 12, 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
7.9
Good
8,007 reviews

Entertainment

7.9

Crew

8.5

Boarding

8.1

Overall

7.9

Food

7.3

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
7.9
Good
8,007 reviews
Delta
7.9
Good
8,007 reviews

Entertainment

7.9

Crew

8.5

Boarding

8.1

Overall

7.9

Food

7.3

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 can get you from Ontario to Idaho Falls in just under 5h 56m. 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 51% less than the average price by searching for this airline.

  • 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, November is the cheapest month in which you can book a flight from Ontario to Idaho Falls (average of $60). Flying from Ontario to Idaho Falls in December is currently the most expensive (average of $228). 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 December 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$219Average$424FlexibilityNo cancel feeOn-timeN/A

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