HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Ontario

$165+ 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 10/16. Fares are subject to change and may not be available on all flights or dates of travel.
IDA — ONT
Aug 23 — Aug 301
Sat 8/23
Sat 8/30
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.

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 August 18, 2025.

Round-trip from

$252
(Trip.com)

One-way from

$165
(Delta)

Popular in

June

Cheapest in

May

Average price

$364
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. 7% potential increase in price ($32 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($11 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in August 2025
Search Deals

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 August 18, 2025.

This Trip.com deal was found by Cheapflights users on 8/18. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/186:13 amIDA - ONT
1 stop5h 31mMultiple Airlines
Mon 9/226:00 amONT - IDA
1 stop7h 49mMultiple Airlines
Deal found 8/18$252
This Kiwi.com deal was found by Cheapflights users on 8/16. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/315:51 pmIDA - ONT
1 stop6h 59mMultiple Airlines
Thu 9/47:30 pmONT - IDA
1 stop19h 35mMultiple Airlines
Deal found 8/16$269
This Hawaiian Airlines deal was found by Cheapflights users on 8/16. 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 Hawaiian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/176:13 amIDA - ONT
1 stop5h 31mHawaiian Airlines
Wed 9/246:00 amONT - IDA
1 stop8h 20mHawaiian Airlines
Deal found 8/16$278
This Delta deal was found by Cheapflights users on 8/16. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/166:51 pmIDA - ONT
1 stop5h 51mDelta
Tue 9/234:40 pmONT - IDA
1 stop4h 45mDelta
Deal found 8/16$279
This Delta deal was found by Cheapflights users on 8/16. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/176:51 pmIDA - ONT
1 stop5h 51mDelta
Wed 9/2411:50 amONT - IDA
2 stops9h 35mDelta
Deal found 8/16$284
This Alaska Airlines deal was found by Cheapflights users on 8/17. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/25:05 amIDA - ONT
1 stop6h 00mAlaska Airlines
Thu 11/64:11 pmONT - IDA
1 stop6h 48mAlaska Airlines
Deal found 8/17$314
This Delta deal was found by Cheapflights users on 8/18. 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 9/176:51 pmIDA - ONT
1 stop5h 51mDelta
Sat 9/206:00 amONT - IDA
1 stop15h 25mDelta
Deal found 8/18$333
This United Airlines deal was found by Cheapflights users on 8/15. 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 9/97:00 amIDA - ONT
1 stop6h 32mUnited Airlines
Sat 9/135:10 amONT - IDA
1 stop7h 20mUnited Airlines
Deal found 8/15$349
This Kiwi.com deal was found by Cheapflights users on 8/18. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/1910:55 pmIDA - ONT
1 stop14h 48mMultiple Airlines
Sat 9/208:59 pmONT - IDA
2 stops21h 54mMultiple Airlines
Deal found 8/18$354
This Delta deal was found by Cheapflights users on 8/18. 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.
Thu 9/186:51 pmIDA - ONT
1 stop5h 51mDelta
Sat 9/209:50 amONT - IDA
1 stop11h 35mDelta
Deal found 8/18$358

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 August 18, 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

Thu 9/18

6:13 am-10:44 am

1 stop5h 31m

Ontario

Mon 9/22

6:00 am-2:49 pm

1 stop7h 49m

$252

Idaho FallsOntario

IDA - ONT

IDAONT

Idaho Falls Fanning Field

Sun 8/31

5:51 pm-11:50 pm

1 stop6h 59m

Ontario

Thu 9/4

7:30 pm-4:05 pm

1 stop19h 35m

$269

Idaho FallsOntario

IDA - ONT

IDAONT

Idaho Falls Fanning Field

Wed 9/17

6:13 am-10:44 am

1 stop5h 31m

Ontario

Wed 9/24

6:00 am-3:20 pm

1 stop8h 20m

$278

Idaho FallsOntario

IDA - ONT

IDAONT

Idaho Falls Fanning Field

Tue 9/16

6:51 pm-11:42 pm

1 stop5h 51m

Ontario

Tue 9/23

4:40 pm-10:25 pm

1 stop4h 45m

$279

Idaho FallsOntario

IDA - ONT

IDAONT

Idaho Falls Fanning Field

Wed 9/17

6:51 pm-11:42 pm

1 stop5h 51m

Ontario

Wed 9/24

11:50 am-10:25 pm

2 stops9h 35m

$284

Idaho FallsOntario

IDA - ONT

IDAONT

Idaho Falls Fanning Field

Sun 11/2

5:05 am-10:05 am

1 stop6h 00m

Ontario

Thu 11/6

4:11 pm-11:59 pm

1 stop6h 48m

$314

Idaho FallsOntario

IDA - ONT

IDAONT

Idaho Falls Fanning Field

Sun 11/2

5:05 am-10:05 am

1 stop6h 00m

Ontario

Thu 11/6

4:11 pm-11:59 pm

1 stop6h 48m

$314

Idaho FallsOntario

IDA - ONT

IDAONT

Idaho Falls Fanning Field

Wed 9/17

6:51 pm-11:42 pm

1 stop5h 51m

Ontario

Sat 9/20

9:50 am-10:25 pm

1 stop11h 35m

$333

Idaho FallsOntario

IDA - ONT

IDAONT

Idaho Falls Fanning Field

Wed 9/17

6:51 pm-11:42 pm

1 stop5h 51m

Ontario

Sun 9/21

6:00 am-10:25 pm

1 stop15h 25m

$333

Idaho FallsOntario

IDA - ONT

IDAONT

Idaho Falls Fanning Field

Thu 10/16

6:53 pm-11:39 pm

1 stop5h 46m

$165

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/18

Showing 1-10 of 20 results
1
2

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, August is the cheapest month in which you can book a flight from Idaho Falls to Ontario (average of $246). Flying from Idaho Falls to Ontario in March is currently the most expensive (average of $328). 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 August 18, 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 August 18, 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
8.0
Very good
7,981 reviews

Crew

8.5

Boarding

8.2

Comfort

7.9

Food

7.3

Overall

8.0

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
8.0
Very good
7,981 reviews
Delta
8.0
Very good
7,981 reviews

Crew

8.5

Boarding

8.2

Comfort

7.9

Food

7.3

Overall

8.0

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 5h 31m. Hawaiian Airlines provides one of the quickest options available for as low as $278. 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.

  • What are the cheapest airlines to fly from Idaho Falls to Ontario one-way?

    For one-way options, check prices for Delta. According to our data, you can fly for as low as $165. Users have also found prices from $216 and $263 on United Airlines and Hawaiian Airlines, respectively.

  • 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, August is the cheapest month in which you can book a flight from Idaho Falls to Ontario (average of $246). Flying from Idaho Falls to Ontario in March is currently the most expensive (average of $328). 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 San Diego flights
Spokane to Las Vegas flights
Spokane to Los Angeles flights
Idaho Falls to Los Angeles flights
Idaho Falls to Santa Ana flights
Idaho Falls to Long Beach flights
Boise to San Diego flights
Boise to San Francisco flights
Boise to Santa Ana flights
Boise to Reno flights
Boise to Burbank flights
Boise to Ontario flights
Boise to Sacramento flights
Spokane to San Francisco flights
Spokane to Ontario flights
Boise to San Jose flights
Spokane to Santa Ana flights
Idaho Falls to Las Vegas flights
Lewiston to Yuma flights
Boise to Oakland flights
Spokane to Palm Springs flights
Spokane to Sacramento flights
Jackson to San Francisco flights
Spokane to Long Beach flights
Spokane to San Jose flights
Jackson to Las Vegas flights
Spokane to Reno flights
Spokane to Burbank flights
Boise to Fresno flights
Jackson to Los Angeles flights
Idaho Falls to San Francisco flights
Boise to Palm Springs flights
Hailey to Los Angeles flights
Jackson to San Diego flights
Spokane to Fresno flights
Spokane to Medford flights
Spokane to San Luis Obispo flights
Jackson to Reno flights
Spokane to Santa Barbara flights
Idaho Falls to San Diego flights
Boise to Santa Rosa flights
Boise to Long Beach flights
Idaho Falls to Oakland flights
Twin Falls to Las Vegas flights
Boise to San Luis Obispo flights
Boise to Santa Barbara flights
Spokane to Oakland 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 August 18, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$164Average$451FlexibilityNo 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.