HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Idaho Falls

$116+ Cheap flights from Ontario to Idaho Falls (ONT - IDA)

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 9/8. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — IDA
Aug 19 — Aug 261
Tue 8/19
Tue 8/26
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Ontario to Idaho Falls 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 Ontario to Idaho Falls

Discover tips and strategies to find the most affordable flight options for your journey from Ontario (ONT) to Idaho Falls (IDA). 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 14, 2025.

Round-trip from

$208
(Kiwi.com)

One-way from

$116
(Trip.com)

Popular in

March

Cheapest in

July

Average price

$450
From Ontario to Idaho Falls Fanning Field
Search Deals
One-way flight from Ontario to Idaho Falls Fanning Field
Search Deals
Highest demand for flights based on searches. 27% potential increase in price ($162 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($18 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in August 2025
Search Deals

Find flight deals from Ontario to Idaho Falls

Cheapest flights from Ontario to Idaho Falls
Explore the most affordable flight options available from Ontario to Idaho Falls. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 14, 2025.

This Kiwi.com deal was found by Cheapflights users on 8/13. 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.
Thu 9/257:30 pmONT - IDA
1 stop19h 35mMultiple Airlines
Mon 9/299:39 pmIDA - ONT
1 stop25h 17mMultiple Airlines
Deal found 8/13$208
This Delta deal was found by Cheapflights users on 8/11. 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 10/186:00 amONT - IDA
1 stop5h 33mDelta
Sat 10/256:53 pmIDA - ONT
1 stop3h 27mDelta
Deal found 8/11$279
This Trip.com deal was found by Cheapflights users on 8/11. 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.
Fri 9/126:00 amONT - IDA
1 stop9h 05mMultiple Airlines
Wed 9/176:13 amIDA - ONT
1 stop5h 31mMultiple Airlines
Deal found 8/11$288
This Delta deal was found by Cheapflights users on 8/13. 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 9/164:40 pmONT - IDA
1 stop4h 45mDelta
Mon 9/226:51 pmIDA - ONT
1 stop5h 51mDelta
Deal found 8/13$290
This Delta deal was found by Cheapflights users on 8/12. 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 11/245:05 pmONT - IDA
1 stop4h 15mDelta
Fri 11/286:50 pmIDA - ONT
1 stop4h 56mDelta
Deal found 8/12$301
This Trip.com deal was found by Cheapflights users on 8/12. 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.
Fri 8/296:00 amONT - IDA
1 stop8h 59mMultiple Airlines
Wed 10/16:13 amIDA - ONT
1 stop5h 31mMultiple Airlines
Deal found 8/12$303
This Delta deal was found by Cheapflights users on 8/13. 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 9/251:15 pmONT - IDA
1 stop3h 56mDelta
Tue 9/306:51 pmIDA - ONT
1 stop5h 51mDelta
Deal found 8/13$304
This Alaska Airlines deal was found by Cheapflights users on 8/12. 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.
Thu 10/91:31 pmONT - IDA
1 stop8h 07mAlaska Airlines
Mon 10/136:00 amIDA - ONT
1 stop7h 37mAlaska Airlines
Deal found 8/12$314
This Hawaiian Airlines deal was found by Cheapflights users on 8/12. 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.
Fri 10/33:06 pmONT - IDA
1 stop6h 33mHawaiian Airlines
Sun 10/56:00 amIDA - ONT
1 stop7h 37mHawaiian Airlines
Deal found 8/12$328
This Delta deal was found by Cheapflights users on 8/13. 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.
Fri 9/51:15 pmONT - IDA
1 stop3h 56mDelta
Tue 9/96:52 pmIDA - ONT
1 stop4h 48mDelta
Deal found 8/13$329

Cheapflights Fare Finder

 
Customize your flight search to find flights from Ontario to Idaho Falls 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 14, 2025.
Use the filters below to find and compare flights from Ontario to Idaho Falls that are best for you.

Fly from

Ontario

Fly to

Idaho Falls

Route

Depart

Return

Price

OntarioIdaho Falls

ONT - IDA

ONTIDA

Ontario

Thu 9/25

7:30 pm-4:05 pm

1 stop19h 35m

Idaho Falls Fanning Field

Mon 9/29

9:39 pm-9:56 pm

1 stop25h 17m

$208

OntarioIdaho Falls

ONT - IDA

ONTIDA

Ontario

Sat 10/18

6:00 am-12:33 pm

1 stop5h 33m

Idaho Falls Fanning Field

Sat 10/25

6:53 pm-9:20 pm

1 stop3h 27m

$279

OntarioIdaho Falls

ONT - IDA

ONTIDA

Ontario

Fri 9/12

6:00 am-4:05 pm

1 stop9h 05m

Idaho Falls Fanning Field

Wed 9/17

6:13 am-10:44 am

1 stop5h 31m

$288

OntarioIdaho Falls

ONT - IDA

ONTIDA

Ontario

Tue 9/16

4:40 pm-10:25 pm

1 stop4h 45m

Idaho Falls Fanning Field

Mon 9/22

6:51 pm-11:42 pm

1 stop5h 51m

$290

OntarioIdaho Falls

ONT - IDA

ONTIDA

Ontario

Mon 11/24

5:05 pm-10:20 pm

1 stop4h 15m

Idaho Falls Fanning Field

Fri 11/28

6:50 pm-10:46 pm

1 stop4h 56m

$301

OntarioIdaho Falls

ONT - IDA

ONTIDA

Ontario

Wed 10/8

1:31 pm-10:38 pm

1 stop8h 07m

Idaho Falls Fanning Field

Sat 10/11

6:00 am-12:37 pm

1 stop7h 37m

$303

OntarioIdaho Falls

ONT - IDA

ONTIDA

Ontario

Fri 8/29

6:00 am-3:59 pm

1 stop8h 59m

Idaho Falls Fanning Field

Wed 10/1

6:13 am-10:44 am

1 stop5h 31m

$303

OntarioIdaho Falls

ONT - IDA

ONTIDA

Ontario

Thu 9/25

1:15 pm-6:11 pm

1 stop3h 56m

Idaho Falls Fanning Field

Tue 9/30

6:51 pm-11:42 pm

1 stop5h 51m

$304

OntarioIdaho Falls

ONT - IDA

ONTIDA

Ontario

Thu 10/23

1:31 pm-10:38 pm

1 stop8h 07m

Idaho Falls Fanning Field

Sun 10/26

6:05 am-11:05 am

1 stop6h 00m

$314

OntarioIdaho Falls

ONT - IDA

ONTIDA

Ontario

Thu 10/9

1:31 pm-10:38 pm

1 stop8h 07m

Idaho Falls Fanning Field

Mon 10/13

6:00 am-12:37 pm

1 stop7h 37m

$314

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/14

Showing 1-10 of 22 results
1
2
3

Best time to book a flight from Ontario to Idaho Falls

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

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

Currently, October is the cheapest month in which you can book a flight from Ontario to Idaho Falls (average of $380). Flying from Ontario to Idaho Falls in December is currently the most expensive (average of $578). 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 ONT to IDA?

Find hourly flight availability from Ontario to Idaho Falls. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated August 14, 2025.

When flying from Ontario to Idaho Falls, the time of day you fly usually plays a role in the price. Save by searching for a flight in the morning, which can drop the price by up to 11% versus a flight in the afternoon.

How much does it cost to fly round-trip from Ontario to Idaho Falls?

Reviews of airlines servicing Idaho Falls

Get insights into the airlines that provide service to Idaho Falls. 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 Idaho Falls. Reviews last updated August 14, 2025.
Read reviews from past customers who have flown Delta from Ontario to Idaho Falls. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,980 reviews

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Food

7.3

Overall

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Michael,Sep 2023

SMF - ATL

Not sufficient leg room and three seats are very tigh.t on 737 in economy main cabin
Delta
8.0
Very good
7,980 reviews
Delta
8.0
Very good
7,980 reviews

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Food

7.3

Overall

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Michael,Sep 2023

SMF - ATL

Not sufficient leg room and three seats are very tigh.t on 737 in economy main cabin

Related info for your journey

Find useful and relevant information for your journey from Ontario to Idaho Falls. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

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

    Cheapflights users have booked flights from Ontario to Idaho Falls round-trip from $219. You may be able to fly from Ontario to Idaho Falls for 49% less than the average price by searching for this airline.

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

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

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

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

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

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

    Currently, October is the cheapest month in which you can book a flight from Ontario to Idaho Falls (average of $380). Flying from Ontario to Idaho Falls in December is currently the most expensive (average of $578). 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

Traveling to a place near Idaho Falls?

Book flights to Idaho Falls if you plan to visit one of these locations
Rexburg

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 Ontario to Idaho Falls

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

Top airline flying from Ontario to Idaho Falls

Discover the top airline that operate flights from Ontario to Idaho Falls. 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 14, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$219Average$385FlexibilityNo 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.