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$99+ Cheap flights from Idaho Falls to Ontario (IDA - ONT)

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 4/20. Fares are subject to change and may not be available on all flights or dates of travel.
IDA — ONT
Apr 20 — Apr 271
Mon 4/20
Mon 4/27
1 adult, Economy
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Cheap flight deals from Idaho Falls to Ontario

Cheapest flights from Idaho Falls to Ontario
Explore the most affordable flight options available from Idaho Falls to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 21, 2026.

This Delta deal was found by Cheapflights users on 3/17. 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 4/206:58 pm
IDA
-
ONT
1 stop5h 46m
Delta
Wed 4/225:05 pm
ONT
-
IDA
1 stop4h 35m
Delta
Deal found 3/17$294
This Alaska Airlines deal was found by Cheapflights users on 3/16. 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.
Fri 5/14:06 pm
IDA
-
ONT
1 stop18h 39m
Alaska Airlines
Fri 5/87:59 pm
ONT
-
IDA
1 stop25h 41m
Alaska Airlines
Deal found 3/16$370
This Alaska Airlines deal was found by Cheapflights users on 3/20. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/284:06 pm
IDA
-
ONT
1 stop7h 26m
Alaska Airlines
Sat 5/23:26 pm
ONT
-
IDA
1 stop6h 14m
Alaska Airlines
Deal found 3/20$377
This Delta deal was found by Cheapflights users on 3/18. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/306:10 am
IDA
-
ONT
1 stop3h 51m
Delta
Tue 10/65:05 pm
ONT
-
IDA
1 stop4h 14m
Delta
Deal found 3/18$381
This Alaska Airlines deal was found by Cheapflights users on 3/19. 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.
Mon 5/44:06 pm
IDA
-
ONT
1 stop8h 53m
Alaska Airlines
Wed 5/137:00 am
ONT
-
IDA
1 stop5h 17m
Alaska Airlines
Deal found 3/19$385
This Delta deal was found by Cheapflights users on 3/18. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/306:10 am
IDA
-
ONT
2 stops7h 39m
Delta
Sun 10/45:05 pm
ONT
-
IDA
1 stop4h 09m
Delta
Deal found 3/18$386
This Delta deal was found by Cheapflights users on 3/18. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/36:50 pm
IDA
-
ONT
1 stop5h 54m
Delta
Tue 10/65:05 pm
ONT
-
IDA
1 stop4h 14m
Delta
Deal found 3/18$395
This Delta deal was found by Cheapflights users on 3/18. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/306:10 am
IDA
-
ONT
2 stops7h 39m
Delta
Fri 10/25:05 pm
ONT
-
IDA
1 stop4h 09m
Delta
Deal found 3/18$400
This Alaska Airlines deal was found by Cheapflights users on 3/18. 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.
Sat 10/36:15 am
IDA
-
ONT
1 stop5h 54m
Alaska Airlines
Sat 10/34:00 pm
ONT
-
IDA
1 stop5h 39m
Alaska Airlines
Deal found 3/18$409

Find flight deals from Idaho Falls to Ontario

Discover tips and strategies to find the most affordable flight options for your journey from Idaho Falls (IDA) to Ontario (ONT). 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 March 21, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$294
(Delta)

One-way from

$99
(Kiwi.com)

Popular in

November

Cheapest in

June

Average price

$634
Provider with most accurate pricing for Idaho Falls Fanning Field-Ontario flight deals.
Search Deals
Provider most trusted by Cheapflights users for Idaho Falls Fanning Field-Ontario flights.
Search Deals
From Idaho Falls Fanning Field to Ontario
Search Deals
One-way flight from Idaho Falls Fanning Field to Ontario
Search Deals
Highest demand for flights based on searches. 29% potential increase in price ($163 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 6% potential price decrease ($26 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Idaho Falls to Ontario 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 21, 2026.
Use the filters below to find and compare flights from Idaho Falls to Ontario that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Idaho FallsOntario

IDA - ONT

IDAONT

Idaho Falls Fanning Field

Mon 5/4

4:06 pm-11:59 pm

1 stop8h 53m

Ontario

Wed 5/13

7:00 am-1:17 pm

1 stop5h 17m

$385

Idaho FallsOntario

IDA - ONT

IDAONT

Idaho Falls Fanning Field

Fri 5/1

4:06 pm-9:45 am

1 stop18h 39m

Ontario

Fri 5/8

7:59 pm-10:40 pm

1 stop25h 41m

$420
Quickest round-trip

Idaho FallsOntario

IDA - ONT

IDAONT

Idaho Falls Fanning Field

Tue 4/14

6:58 pm-11:44 pm

1 stop5h 46m

Ontario

Fri 4/17

5:05 pm-10:40 pm

1 stop4h 35m

$430

Idaho FallsOntario

IDA - ONT

IDAONT

Idaho Falls Fanning Field

Mon 5/4

2:31 pm-8:36 pm

1 stop7h 05m

Ontario

Wed 5/6

5:00 am-1:25 pm

1 stop7h 25m

$433

Idaho FallsOntario

IDA - ONT

IDAONT

Idaho Falls Fanning Field

Tue 4/14

6:00 am-9:39 am

1 stop28h 39m

Ontario

Tue 4/21

6:00 am-10:52 pm

1 stop15h 52m

$453

Idaho FallsOntario

IDA - ONT

IDAONT

Idaho Falls Fanning Field

Tue 8/11

2:30 pm-8:52 pm

1 stop7h 22m

Ontario

Mon 8/17

5:00 am-1:24 pm

1 stop7h 24m

$481

Idaho FallsOntario

IDA - ONT

IDAONT

Idaho Falls Fanning Field

Thu 5/7

6:00 am-2:32 pm

1 stop9h 32m

Ontario

Sun 5/10

3:26 pm-10:40 pm

1 stop6h 14m

$491
Cheapest one-way

Idaho FallsOntario

IDA - ONT

IDAONT

Idaho Falls Fanning Field

Sun 6/21

11:20 am-4:14 pm

1 stop5h 54m

$205

Idaho FallsOntario

IDA - ONT

IDAONT

Idaho Falls Fanning Field

Wed 5/6

6:58 pm-11:43 pm

1 stop5h 45m

$205
Quickest one-way

Idaho FallsOntario

IDA - ONT

IDAONT

Idaho Falls Fanning Field

Sat 5/30

6:54 pm-10:45 pm

1 stop4h 51m

$205

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/16

Showing 1-10 of 13 resultsSorted by cheapest first
1
2

Compare providers for flights from Idaho Falls to Ontario

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 Idaho Falls to Ontario in March.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust 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 Idaho Falls-Ontario flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Idaho Falls-Ontario flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Idaho Falls-Ontario flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Idaho Falls-Ontario 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 Idaho Falls-Ontario 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 Idaho Falls to Ontario

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

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

Currently, September is the cheapest month in which you can book a flight from Idaho Falls to Ontario (average of $92). Flying from Idaho Falls to Ontario in June is currently the most expensive (average of $164). 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 Ontario

Get insights into the airlines that provide service to Ontario. 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 Ontario. Reviews last updated March 21, 2026.
Peruse reviews from past customers who have flown with Delta and United Airlines from Idaho Falls to Ontario to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
7.9
Good
8,313 reviews

Comfort

7.9

Overall

7.9

Crew

8.5

Boarding

8.1

Entertainment

7.8

Food

7.2

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Delta
7.9
Good
8,313 reviews
Delta
7.9
Good
8,313 reviews

Comfort

7.9

Overall

7.9

Crew

8.5

Boarding

8.1

Entertainment

7.8

Food

7.2

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
United Airlines
7.4
Good
9,451 reviews
Delta
7.9
Good
8,313 reviews

Comfort

7.9

Overall

7.9

Crew

8.5

Boarding

8.1

Entertainment

7.8

Food

7.2

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Related info for your journey

Find useful and relevant information for your journey from Idaho Falls to Ontario. 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 Idaho Falls to Ontario?

    A quick flight from Idaho Falls to Ontario can take about 5h 46m. Alaska Airlines provides one of the quickest options available for as low as $430. Airlines will cover a distance of 717 mi. Both multi-stop and nonstop flights can be found to your destination and back.

  • What are the cheapest airlines flying from Idaho Falls to Ontario round-trip?

    Flying on United Airlines is currently your cheapest option to Ontario, with prices starting at $143. Another option worth looking into is Delta, starting at $155 round trip. United Airlines is priced at 64% lower than the current average price of a flight leaving 3 months from now.

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

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

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

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

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

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

    Currently, September is the cheapest month in which you can book a flight from Idaho Falls to Ontario (average of $92). Flying from Idaho Falls to Ontario in June is currently the most expensive (average of $164). 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

Browse thousands of different options on Cheapflights for your next trip

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Top 2 airlines flying from Idaho Falls to Ontario

Discover the top 2 airlines that operate flights from Idaho Falls to Ontario. 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 21, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$143Average$538FlexibilityNo cancel feeOn-time69%
DeltaCheapest$155Average$398FlexibilityNo cancel feeOn-timeN/A

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