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$111+ 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 3/6. Fares are subject to change and may not be available on all flights or dates of travel.
IDA — ONT
Mar 26 — Apr 21
Thu 3/26
Thu 4/2
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 February 24, 2026.

This Kiwi.com deal was found by Cheapflights users on 2/21. 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 3/2710:13 pm
IDA
-
ONT
1 stop21h 23m
Multiple Airlines
Sun 4/511:00 am
ONT
-
IDA
1 stop27h 12m
Multiple Airlines
Deal found 2/21$213
This Kiwi.com deal was found by Cheapflights users on 2/21. 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.
Mon 3/2310:13 pm
IDA
-
ONT
1 stop16h 15m
Multiple Airlines
Sun 4/511:00 am
ONT
-
IDA
1 stop27h 12m
Multiple Airlines
Deal found 2/21$223
This Kiwi.com deal was found by Cheapflights users on 2/21. 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 3/2710:13 pm
IDA
-
ONT
1 stop16h 15m
Multiple Airlines
Thu 4/210:50 am
ONT
-
IDA
1 stop27h 22m
Multiple Airlines
Deal found 2/21$252
This Kiwi.com deal was found by Cheapflights users on 2/21. 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.
Mon 3/2310:13 pm
IDA
-
ONT
1 stop16h 15m
Multiple Airlines
Thu 4/210:50 am
ONT
-
IDA
1 stop27h 22m
Multiple Airlines
Deal found 2/21$263
This Kiwi.com deal was found by Cheapflights users on 2/21. 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 3/2710:13 pm
IDA
-
ONT
1 stop16h 15m
Multiple Airlines
Mon 4/611:10 am
ONT
-
IDA
2 stops9h 06m
Multiple Airlines
Deal found 2/21$269
This Delta deal was found by Cheapflights users on 2/21. 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 3/256:55 pm
IDA
-
ONT
1 stop5h 56m
Delta
Fri 4/31:20 pm
ONT
-
IDA
1 stop3h 55m
Delta
Deal found 2/21$277
This Kiwi.com deal was found by Cheapflights users on 2/21. 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.
Mon 3/2310:13 pm
IDA
-
ONT
1 stop16h 15m
Multiple Airlines
Mon 4/611:10 am
ONT
-
IDA
2 stops9h 06m
Multiple Airlines
Deal found 2/21$279
This Kiwi.com deal was found by Cheapflights users on 2/21. 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 3/2810:34 pm
IDA
-
ONT
2 stops34h 32m
Multiple Airlines
Sun 4/510:35 pm
ONT
-
IDA
1 stop15h 37m
Multiple Airlines
Deal found 2/21$290
This Alaska Airlines deal was found by Cheapflights users on 2/21. 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 3/235:59 pm
IDA
-
ONT
1 stop16h 40m
Alaska Airlines
Wed 4/16:00 am
ONT
-
IDA
1 stop15h 52m
Alaska Airlines
Deal found 2/21$293
This Kiwi.com deal was found by Cheapflights users on 2/21. 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.
Sun 3/299:52 am
IDA
-
ONT
2 stops23h 14m
Multiple Airlines
Sun 4/510:35 pm
ONT
-
IDA
1 stop15h 37m
Multiple Airlines
Deal found 2/21$296

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 February 24, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$213
(Kiwi.com)

One-way from

$111
(Trip.com)

Popular in

March

Cheapest in

September

Average price

$339
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. 15% potential increase in price ($77 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($23 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 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 February 24, 2026.
Use the filters below to find and compare flights from Idaho Falls to Ontario that are best for you.

Fly from

Idaho Falls

Fly to

Ontario

Route

Depart

Return

Price

Idaho FallsOntario

IDA - ONT

IDAONT

Idaho Falls Fanning Field

Sat 4/18

4:59 pm-11:59 pm

1 stop8h 00m

Ontario

Thu 4/23

7:59 pm-10:40 pm

1 stop25h 41m

$313

Idaho FallsOntario

IDA - ONT

IDAONT

Idaho Falls Fanning Field

Sun 3/29

2:30 pm-8:36 pm

1 stop7h 06m

Ontario

Thu 4/2

5:10 am-1:24 pm

1 stop7h 14m

$400

Idaho FallsOntario

IDA - ONT

IDAONT

Idaho Falls Fanning Field

Wed 4/1

4:59 pm-11:59 pm

1 stop8h 00m

Ontario

Wed 4/8

6:25 pm-10:52 pm

2 stops51h 27m

$411

Idaho FallsOntario

IDA - ONT

IDAONT

Idaho Falls Fanning Field

Thu 3/26

5:59 pm-9:39 am

1 stop16h 40m

Ontario

Sat 4/4

10:33 am-10:52 pm

1 stop11h 19m

$418

Idaho FallsOntario

IDA - ONT

IDAONT

Idaho Falls Fanning Field

Sun 3/29

6:00 am-9:39 am

1 stop28h 39m

Ontario

Thu 4/2

6:00 am-4:19 pm

1 stop9h 19m

$428

Idaho FallsOntario

IDA - ONT

IDAONT

Idaho Falls Fanning Field

Mon 3/9

5:20 pm-11:32 pm

1 stop7h 12m

Ontario

Fri 3/13

4:02 pm-11:36 pm

1 stop6h 34m

$446

Idaho FallsOntario

IDA - ONT

IDAONT

Idaho Falls Fanning Field

Fri 3/20

5:59 pm-11:59 pm

1 stop7h 00m

Ontario

Sun 3/22

6:00 am-5:19 pm

1 stop10h 19m

$464

Idaho FallsOntario

IDA - ONT

IDAONT

Idaho Falls Fanning Field

Fri 3/20

5:59 pm-11:59 pm

1 stop7h 00m

Ontario

Sat 3/21

10:33 am-10:52 pm

1 stop11h 19m

$478

Idaho FallsOntario

IDA - ONT

IDAONT

Idaho Falls Fanning Field

Fri 5/1

6:00 am-11:59 pm

1 stop18h 59m

Ontario

Sun 5/3

7:00 am-10:40 pm

2 stops14h 40m

$481

Idaho FallsOntario

IDA - ONT

IDAONT

Idaho Falls Fanning Field

Tue 4/28

6:00 am-2:19 pm

2 stops9h 19m

Ontario

Sat 5/2

7:00 am-10:40 pm

2 stops14h 40m

$490

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/23

Showing 1-10 of 18 results
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 February.
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, May is the cheapest month in which you can book a flight from Idaho Falls to Ontario (average of $89). 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 February 24, 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
8,238 reviews

Food

7.2

Boarding

8.1

Comfort

7.9

Overall

7.9

Crew

8.5

Entertainment

7.8

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
8,238 reviews
Delta
7.9
Good
8,238 reviews

Food

7.2

Boarding

8.1

Comfort

7.9

Overall

7.9

Crew

8.5

Entertainment

7.8

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
9,345 reviews
Delta
7.9
Good
8,238 reviews

Food

7.2

Boarding

8.1

Comfort

7.9

Overall

7.9

Crew

8.5

Entertainment

7.8

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 7h 06m. Alaska Airlines provides one of the quickest options available for as low as $400. 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 $164 round trip. United Airlines is priced at 66% 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, May is the cheapest month in which you can book a flight from Idaho Falls to Ontario (average of $89). 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 February 24, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$143Average$538FlexibilityNo cancel feeOn-time69%
DeltaCheapest$164Average$398FlexibilityNo cancel feeOn-timeN/A

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