HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Ontario

$86+ 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 12/3. Fares are subject to change and may not be available on all flights or dates of travel.
IDA — ONT
Nov 21 — Nov 281
Fri 11/21
Fri 11/28
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Idaho Falls to Ontario with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Find 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 October 22, 2025.

This Kiwi.com deal was found by Cheapflights users on 10/21. 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 10/277:40 pmIDA - ONT
1 stop26h 02mMultiple Airlines
Fri 10/316:00 amONT - IDA
1 stop9h 14mMultiple Airlines
Deal found 10/21$284
This Kiwi.com deal was found by Cheapflights users on 10/21. 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.
Wed 11/191:22 pmIDA - ONT
2 stops22h 49mMultiple Airlines
Wed 11/266:30 amONT - IDA
1 stop8h 33mMultiple Airlines
Deal found 10/21$312
This Alaska Airlines deal was found by Cheapflights users on 10/21. 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 11/176:05 amIDA - ONT
1 stop6h 00mAlaska Airlines
Wed 11/194:11 pmONT - IDA
1 stop6h 48mAlaska Airlines
Deal found 10/21$319
This Alaska Airlines deal was found by Cheapflights users on 10/21. 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.
Tue 11/116:05 amIDA - ONT
1 stop6h 00mAlaska Airlines
Thu 11/134:11 pmONT - IDA
1 stop6h 48mAlaska Airlines
Deal found 10/21$369
This Kiwi.com deal was found by Cheapflights users on 10/19. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/2610:51 pmIDA - ONT
1 stop23h 15mMultiple Airlines
Mon 12/16:30 amONT - IDA
1 stop11h 38mMultiple Airlines
Deal found 10/19$404
This Alaska Airlines deal was found by Cheapflights users on 10/21. 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.
Fri 11/143:50 pmIDA - ONT
1 stop24h 27mAlaska Airlines
Mon 11/176:11 pmONT - IDA
1 stop20h 02mAlaska Airlines
Deal found 10/21$415
This Kiwi.com deal was found by Cheapflights users on 10/20. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/2610:52 pmIDA - ONT
1 stop24h 36mMultiple Airlines
Sun 1/45:24 pmONT - IDA
1 stop21h 48mMultiple Airlines
Deal found 10/20$416
This Alaska Airlines deal was found by Cheapflights users on 10/20. 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.
Fri 11/143:50 pmIDA - ONT
1 stop24h 27mAlaska Airlines
Sun 11/166:00 amONT - IDA
1 stop16h 59mAlaska Airlines
Deal found 10/20$425

Cheap 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 October 22, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$312
(Kiwi.com)

One-way from

$86
(Trip.com)

Popular in

November

Cheapest in

June

Average price

$420
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. 20% potential increase in price ($106 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 6% potential price decrease ($28 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 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 October 22, 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

Wed 11/19

1:22 pm-11:11 am

2 stops22h 49m

Ontario

Wed 11/26

6:30 am-4:03 pm

1 stop8h 33m

$312

Idaho FallsOntario

IDA - ONT

IDAONT

Idaho Falls Fanning Field

Mon 11/17

6:05 am-11:05 am

1 stop6h 00m

Ontario

Wed 11/19

4:11 pm-11:59 pm

1 stop6h 48m

$319

Idaho FallsOntario

IDA - ONT

IDAONT

Idaho Falls Fanning Field

Tue 2/24

4:00 pm-10:37 pm

1 stop7h 37m

Ontario

Fri 3/6

6:00 am-3:23 pm

1 stop8h 23m

$328

Idaho FallsOntario

IDA - ONT

IDAONT

Idaho Falls Fanning Field

Tue 3/31

6:45 pm-11:52 pm

1 stop6h 07m

Ontario

Thu 4/2

5:05 pm-10:21 pm

1 stop4h 16m

$335

Idaho FallsOntario

IDA - ONT

IDAONT

Idaho Falls Fanning Field

Thu 1/22

6:58 pm-11:56 pm

1 stop5h 58m

Ontario

Sun 1/25

11:53 am-6:18 pm

1 stop5h 25m

$335

Idaho FallsOntario

IDA - ONT

IDAONT

Idaho Falls Fanning Field

Tue 11/11

6:05 am-11:05 am

1 stop6h 00m

Ontario

Thu 11/13

4:11 pm-11:59 pm

1 stop6h 48m

$369

Idaho FallsOntario

IDA - ONT

IDAONT

Idaho Falls Fanning Field

Wed 11/26

10:51 pm-9:06 pm

1 stop23h 15m

Ontario

Mon 12/1

6:30 am-7:08 pm

1 stop11h 38m

$410

Idaho FallsOntario

IDA - ONT

IDAONT

Idaho Falls Fanning Field

Fri 1/16

6:58 pm-11:56 pm

1 stop5h 58m

Ontario

Wed 1/21

11:53 am-11:58 pm

1 stop11h 05m

$412

Idaho FallsOntario

IDA - ONT

IDAONT

Idaho Falls Fanning Field

Mon 10/27

7:40 pm-8:42 pm

1 stop26h 02m

$115

Idaho FallsOntario

IDA - ONT

IDAONT

Idaho Falls Fanning Field

Mon 11/17

7:56 pm-8:42 pm

1 stop25h 46m

$125

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/21

Showing 1-10 of 17 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 October.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
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 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 $86). Flying from Idaho Falls to Ontario in January is currently the most expensive (average of $178). 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 October 22, 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 October 22, 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
7,981 reviews

Entertainment

7.9

Crew

8.5

Overall

7.9

Food

7.3

Comfort

7.9

Boarding

8.2

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
7,981 reviews
Delta
7.9
Good
7,981 reviews

Entertainment

7.9

Crew

8.5

Overall

7.9

Food

7.3

Comfort

7.9

Boarding

8.2

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 6h. Alaska Airlines provides one of the quickest options available for as low as $319. 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 60% 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 January is currently the most expensive (average of $178). 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

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Idaho Falls to Ontario

See prices for flight routes from nearby airports that may be better suited for you.
Boise to Las Vegas flights
Boise to Los Angeles flights
Spokane to Las Vegas flights
Spokane to Los Angeles flights
Spokane to San Diego flights
Boise to Burbank flights
Boise to Santa Ana flights
Boise to Sacramento flights
Boise to San Diego flights
Boise to San Francisco flights
Spokane to Ontario flights
Spokane to San Francisco flights
Idaho Falls to Las Vegas flights
Boise to Ontario flights
Spokane to San Jose flights
Spokane to Sacramento flights
Spokane to Santa Ana flights
Spokane to Oakland flights
Idaho Falls to Santa Ana flights
Boise to San Jose flights
Boise to Palm Springs flights
Spokane to Palm Springs flights
Idaho Falls to San Jose flights
Lewiston to Yuma flights
Boise to Fresno flights
Spokane to Burbank flights
Spokane to Reno flights
Jackson to San Diego flights
Idaho Falls to Sacramento flights
Spokane to Long Beach flights
Jackson to Los Angeles flights
Idaho Falls to Oakland flights
Idaho Falls to San Francisco flights
Idaho Falls to Los Angeles flights
Boise to Oakland flights
Hailey to Los Angeles flights
Jackson to San Francisco flights
Boise to Long Beach flights
Boise to Medford flights
Boise to Santa Barbara flights
Boise to Reno flights
Boise to San Luis Obispo flights
Spokane to San Luis Obispo flights
Jackson to Ontario flights
Idaho Falls to San Diego flights
Idaho Falls to Fresno flights
Idaho Falls to Reno flights
Jackson to Las Vegas flights
Hailey to Las Vegas flights

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 October 22, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$164Average$514FlexibilityNo cancel feeOn-timeN/A

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.