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Idaho Falls

$122+ 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 3/11. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — IDA
Mar 24 — Mar 311
Tue 3/24
Tue 3/31
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 February 22, 2026.

This Alaska Airlines 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/1810:33 am
ONT
-
IDA
1 stop5h 46m
Alaska Airlines
Wed 3/255:59 pm
IDA
-
ONT
1 stop7h 00m
Alaska Airlines
Deal found 2/18$299
This Alaska Airlines 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/126:14 am
ONT
-
IDA
1 stop16h 22m
Alaska Airlines
Sun 3/158:00 am
IDA
-
ONT
1 stop16h 32m
Alaska Airlines
Deal found 2/18$324
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.
Wed 4/16:00 am
ONT
-
IDA
1 stop9h 19m
Alaska Airlines
Wed 4/86:00 am
IDA
-
ONT
1 stop18h 59m
Alaska Airlines
Deal found 2/19$334
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.
Fri 5/225:00 am
ONT
-
IDA
1 stop7h 25m
United Airlines
Thu 5/2810:35 am
IDA
-
ONT
1 stop7h 53m
United Airlines
Deal found 2/20$335
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.
Tue 3/246:00 am
ONT
-
IDA
1 stop10h 19m
Alaska Airlines
Tue 3/315:59 pm
IDA
-
ONT
1 stop16h 40m
Alaska Airlines
Deal found 2/19$348
This Expedia 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/410:33 am
ONT
-
IDA
1 stop11h 19m
Alaska Airlines
Mon 4/64:59 pm
IDA
-
ONT
2 stops23h 43m
Alaska Airlines
Deal found 2/19$350
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.
Fri 5/87:59 pm
ONT
-
IDA
1 stop18h 30m
Alaska Airlines
Mon 5/114:06 pm
IDA
-
ONT
1 stop18h 39m
Alaska Airlines
Deal found 2/19$354
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.
Thu 6/44:03 pm
ONT
-
IDA
1 stop5h 50m
Alaska Airlines
Sun 6/76:00 am
IDA
-
ONT
1 stop6h 10m
Alaska Airlines
Deal found 2/19$370

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 February 22, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$299
(Alaska Airlines)

One-way from

$122
(Alaska Airlines)

Popular in

April

Cheapest in

July

Average price

$577
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. 9% potential increase in price ($49 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($16 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in February 2026
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 February 22, 2026.
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

Wed 3/18

10:33 am-5:19 pm

1 stop5h 46m

Idaho Falls Fanning Field

Wed 3/25

5:59 pm-11:59 pm

1 stop7h 00m

$299

OntarioIdaho Falls

ONT - IDA

ONTIDA

Ontario

Thu 3/12

6:14 am-11:36 pm

1 stop16h 22m

Idaho Falls Fanning Field

Sun 3/15

8:00 am-11:32 pm

1 stop16h 32m

$324

OntarioIdaho Falls

ONT - IDA

ONTIDA

Ontario

Wed 4/1

6:00 am-4:19 pm

1 stop9h 19m

Idaho Falls Fanning Field

Wed 4/8

6:00 am-11:59 pm

1 stop18h 59m

$334

OntarioIdaho Falls

ONT - IDA

ONTIDA

Ontario

Tue 6/2

7:00 am-1:17 pm

1 stop5h 17m

Idaho Falls Fanning Field

Sat 6/6

6:00 am-11:10 am

1 stop6h 10m

$335

OntarioIdaho Falls

ONT - IDA

ONTIDA

Ontario

Sat 4/4

10:33 am-10:52 pm

1 stop11h 19m

Idaho Falls Fanning Field

Mon 4/6

4:59 pm-3:42 pm

2 stops23h 43m

$350

OntarioIdaho Falls

ONT - IDA

ONTIDA

Ontario

Fri 5/8

7:59 pm-10:40 pm

1 stop25h 41m

Idaho Falls Fanning Field

Mon 5/11

4:06 pm-9:45 am

1 stop18h 39m

$363

OntarioIdaho Falls

ONT - IDA

ONTIDA

Ontario

Thu 6/4

4:03 pm-10:53 pm

1 stop5h 50m

Idaho Falls Fanning Field

Sun 6/7

6:00 am-11:10 am

1 stop6h 10m

$370

OntarioIdaho Falls

ONT - IDA

ONTIDA

Ontario

Thu 3/12

5:15 am-1:30 pm

1 stop7h 15m

Idaho Falls Fanning Field

Sun 3/15

2:35 pm-8:57 pm

1 stop7h 22m

$389

OntarioIdaho Falls

ONT - IDA

ONTIDA

Ontario

Wed 3/11

4:02 pm-11:36 pm

1 stop6h 34m

$122

OntarioIdaho Falls

ONT - IDA

ONTIDA

Ontario

Sat 3/14

6:00 am-12:27 pm

1 stop5h 27m

$122

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/18

Showing 1-10 of 19 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 February.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
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 FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Ontario-Idaho Falls flight deals on Cheapflights vs. FlightHub >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 FlightHub the most. FlightHub 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.

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 February 22, 2026.
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
8,241 reviews

Entertainment

7.8

Comfort

7.9

Overall

7.9

Crew

8.5

Food

7.2

Boarding

8.1

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
8,241 reviews
Delta
7.9
Good
8,241 reviews

Entertainment

7.8

Comfort

7.9

Overall

7.9

Crew

8.5

Food

7.2

Boarding

8.1

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 46m. 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 February 22, 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$219Average$385FlexibilityNo cancel feeOn-timeN/A

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