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Ontario

$155+ Cheap flights from Idaho Falls to Ontario (IDA - ONT)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 1/5. Fares are subject to change and may not be available on all flights or dates of travel.
IDA — ONT
Jan 2 — Jan 91
Fri 1/2
Fri 1/9
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 December 3, 2025.

This United Airlines deal was found by Cheapflights users on 12/2. 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.
Mon 12/224:05 pmIDA - ONT
1 stop6h 02mUnited Airlines
Tue 12/235:05 amONT - IDA
1 stop7h 25mUnited Airlines
Deal found 12/2$365
This United Airlines deal was found by Cheapflights users on 12/2. 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.
Wed 12/244:05 pmIDA - ONT
1 stop6h 02mUnited Airlines
Mon 12/295:05 amONT - IDA
1 stop7h 25mUnited Airlines
Deal found 12/2$391
This American Airlines deal was found by Cheapflights users on 12/2. 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.
Mon 12/227:00 amIDA - ONT
1 stop5h 53mAmerican Airlines
Tue 12/234:44 pmONT - IDA
1 stop4h 37mAmerican Airlines
Deal found 12/2$400
This United Airlines deal was found by Cheapflights users on 12/2. 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.
Sat 12/204:05 pmIDA - ONT
1 stop6h 02mUnited Airlines
Thu 1/15:05 amONT - IDA
1 stop7h 25mUnited Airlines
Deal found 12/2$401
This Kiwi.com deal was found by Cheapflights users on 12/3. 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 12/199:20 pmIDA - ONT
1 stop20h 11mMultiple Airlines
Mon 12/226:00 amONT - IDA
1 stop7h 20mMultiple Airlines
Deal found 12/3$425
This United Airlines deal was found by Cheapflights users on 12/2. 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.
Wed 12/244:05 pmIDA - ONT
1 stop6h 02mUnited Airlines
Tue 12/305:05 amONT - IDA
1 stop7h 25mUnited Airlines
Deal found 12/2$431
This United Airlines deal was found by Cheapflights users on 12/2. 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.
Mon 12/224:05 pmIDA - ONT
1 stop6h 02mUnited Airlines
Wed 12/241:40 pmONT - IDA
1 stop6h 34mUnited Airlines
Deal found 12/2$435
This United Airlines deal was found by Cheapflights users on 12/2. 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.
Wed 12/244:05 pmIDA - ONT
1 stop6h 02mUnited Airlines
Fri 12/265:05 amONT - IDA
1 stop7h 25mUnited Airlines
Deal found 12/2$441
This United Airlines deal was found by Cheapflights users on 12/2. 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.
Tue 12/232:30 pmIDA - ONT
1 stop7h 37mUnited Airlines
Wed 12/241:40 pmONT - IDA
1 stop6h 34mUnited Airlines
Deal found 12/2$450
This United Airlines deal was found by Cheapflights users on 12/2. 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.
Mon 12/224:05 pmIDA - ONT
1 stop6h 02mUnited Airlines
Mon 12/295:05 amONT - IDA
1 stop7h 25mUnited Airlines
Deal found 12/2$451
This United Airlines deal was found by Cheapflights users on 12/2. 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.
Sun 12/214:05 pmIDA - ONT
1 stop6h 02mUnited Airlines
Wed 12/241:40 pmONT - IDA
1 stop6h 34mUnited Airlines
Deal found 12/2$455
This United Airlines deal was found by Cheapflights users on 12/2. 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.
Sat 12/204:05 pmIDA - ONT
1 stop6h 02mUnited Airlines
Wed 12/241:40 pmONT - IDA
1 stop6h 34mUnited Airlines
Deal found 12/2$460

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 December 3, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$155
(Kiwi.com)

Popular in

November

Cheapest in

June

Average price

$514
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
Highest demand for flights based on searches. 25% potential increase in price ($136 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 December 2025
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 December 3, 2025.
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

Tue 2/3

9:00 am-3:08 pm

1 stop7h 08m

Ontario

Tue 2/10

4:03 pm-10:59 pm

1 stop5h 56m

$236

Idaho FallsOntario

IDA - ONT

IDAONT

Idaho Falls Fanning Field

Sat 2/7

9:00 am-3:08 pm

1 stop7h 08m

Ontario

Tue 2/10

4:03 pm-10:59 pm

1 stop5h 56m

$236

Idaho FallsOntario

IDA - ONT

IDAONT

Idaho Falls Fanning Field

Fri 1/9

6:58 pm-11:56 pm

1 stop5h 58m

Ontario

Tue 1/13

11:53 am-10:59 pm

1 stop10h 06m

$252

Idaho FallsOntario

IDA - ONT

IDAONT

Idaho Falls Fanning Field

Fri 2/6

6:58 pm-11:56 pm

1 stop5h 58m

Ontario

Wed 2/11

11:53 am-6:18 pm

1 stop5h 25m

$252

Idaho FallsOntario

IDA - ONT

IDAONT

Idaho Falls Fanning Field

Sat 1/10

5:25 am-1:56 pm

2 stops9h 31m

Ontario

Tue 1/13

5:07 pm-10:19 pm

1 stop4h 12m

$261

Idaho FallsOntario

IDA - ONT

IDAONT

Idaho Falls Fanning Field

Fri 1/23

6:58 pm-7:16 pm

2 stops25h 18m

Ontario

Sat 1/31

11:53 am-10:59 pm

1 stop10h 06m

$272

Idaho FallsOntario

IDA - ONT

IDAONT

Idaho Falls Fanning Field

Sat 1/10

6:58 pm-10:59 am

1 stop17h 01m

Ontario

Thu 1/15

4:03 pm-10:59 pm

1 stop5h 56m

$273

Idaho FallsOntario

IDA - ONT

IDAONT

Idaho Falls Fanning Field

Sat 1/10

6:58 pm-5:03 pm

2 stops23h 05m

Ontario

Sat 1/17

11:53 am-6:18 pm

1 stop5h 25m

$276

Idaho FallsOntario

IDA - ONT

IDAONT

Idaho Falls Fanning Field

Sun 2/8

6:58 pm-11:56 pm

1 stop5h 58m

Ontario

Wed 2/11

11:53 am-6:18 pm

1 stop5h 25m

$282

Idaho FallsOntario

IDA - ONT

IDAONT

Idaho Falls Fanning Field

Fri 1/9

6:58 pm-3:08 pm

1 stop21h 10m

Ontario

Fri 1/16

7:56 pm-10:59 pm

2 stops26h 03m

$282

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/30

Showing 1-10 of 21 results
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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 December.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice 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 eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Idaho Falls-Ontario flight deals on Cheapflights vs. eDreams >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 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 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 $86). 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.

What is the cheapest time of day to fly from IDA to ONT?

Find hourly flight availability from Idaho Falls to Ontario. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated December 3, 2025.

It’s optimal to fly from Idaho Falls to Ontario in the morning. By choosing this option you can save up to 80% on the cost of your flight, compared to a flight at noon.

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 December 3, 2025.
Peruse reviews from past customers who have flown with Delta 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
8,011 reviews

Crew

8.5

Comfort

7.9

Food

7.3

Boarding

8.1

Overall

7.9

Entertainment

7.9

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
8,011 reviews
Delta
7.9
Good
8,011 reviews

Crew

8.5

Comfort

7.9

Food

7.3

Boarding

8.1

Overall

7.9

Entertainment

7.9

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 08m. Alaska Airlines provides one of the quickest options available for as low as $236. Airlines will cover a distance of 717 mi. Both multi-stop and nonstop flights can be found to your destination and back.

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

    Flying on Delta is currently your cheapest option to Ontario, with prices starting at $164. Delta is priced at 59% 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 $86). 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

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Alternative routes for Idaho Falls to Ontario

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Top airline flying from Idaho Falls to Ontario

Discover the top airline 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 December 3, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$164Average$404FlexibilityNo cancel feeOn-timeN/A

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