HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Idaho Falls

$164+ 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 7/26. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — IDA
Jun 17 — Jun 241
Tue 6/17
Tue 6/24
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 June 12, 2025.

Round-trip from

$267
(Alaska Airlines)

One-way from

$164
(Alaska Airlines)

Popular in

March

Cheapest in

July

Average price

$466
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. 26% potential increase in price ($155 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 June 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 June 12, 2025.

This Alaska Airlines deal was found by Cheapflights users on 6/11. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/206:00 amONT - IDA
1 stop8h 23mAlaska Airlines
Sat 8/236:13 amIDA - ONT
1 stop5h 31mAlaska Airlines
Deal found 6/11$267
This Delta deal was found by Cheapflights users on 6/11. 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.
Tue 9/236:45 amONT - IDA
2 stops10h 19mDelta
Tue 9/306:05 amIDA - ONT
1 stop4h 01mDelta
Deal found 6/11$272
This lastminute.co.il deal was found by Cheapflights users on 6/11. 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 lastminute.co.il is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/243:04 pmONT - IDA
1 stop6h 35mHawaiian Airlines
Mon 9/296:13 amIDA - ONT
1 stop5h 31mHawaiian Airlines
Deal found 6/11$331
This United Airlines deal was found by Cheapflights users on 6/10. 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.
Fri 7/115:05 amONT - IDA
1 stop7h 27mUnited Airlines
Mon 7/144:13 pmIDA - ONT
1 stop5h 41mUnited Airlines
Deal found 6/10$425
This American Airlines deal was found by Cheapflights users on 6/11. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/2512:46 pmONT - IDA
1 stop7h 37mAmerican Airlines
Tue 9/306:44 amIDA - ONT
2 stops12h 27mAmerican Airlines
Deal found 6/11$437
This United deal was found by Cheapflights users on 6/10. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/111:34 pmONT - IDA
1 stop6h 25mMultiple Airlines
Mon 7/146:15 amIDA - ONT
1 stop8h 11mMultiple Airlines
Deal found 6/10$736

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 June 12, 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

Wed 8/20

6:00 am-3:23 pm

1 stop8h 23m

Idaho Falls Fanning Field

Sat 8/23

6:13 am-10:44 am

1 stop5h 31m

$267

OntarioIdaho Falls

ONT - IDA

ONTIDA

Ontario

Tue 9/23

6:45 am-6:04 pm

2 stops10h 19m

Idaho Falls Fanning Field

Tue 9/30

6:05 am-9:06 am

1 stop4h 01m

$272

OntarioIdaho Falls

ONT - IDA

ONTIDA

Ontario

Wed 9/24

3:04 pm-10:39 pm

1 stop6h 35m

Idaho Falls Fanning Field

Mon 9/29

6:13 am-10:44 am

1 stop5h 31m

$331

OntarioIdaho Falls

ONT - IDA

ONTIDA

Ontario

Fri 7/11

5:05 am-1:32 pm

1 stop7h 27m

Idaho Falls Fanning Field

Mon 7/14

4:13 pm-8:54 pm

1 stop5h 41m

$425

OntarioIdaho Falls

ONT - IDA

ONTIDA

Ontario

Thu 9/25

12:46 pm-9:23 pm

1 stop7h 37m

Idaho Falls Fanning Field

Tue 9/30

6:44 am-6:11 pm

2 stops12h 27m

$437

OntarioIdaho Falls

ONT - IDA

ONTIDA

Ontario

Fri 7/11

1:34 pm-8:59 pm

1 stop6h 25m

Idaho Falls Fanning Field

Mon 7/14

6:15 am-1:26 pm

1 stop8h 11m

$736

OntarioIdaho Falls

ONT - IDA

ONTIDA

Ontario

Sat 7/26

4:00 pm-10:39 pm

1 stop5h 39m

$164

OntarioIdaho Falls

ONT - IDA

ONTIDA

Ontario

Wed 6/18

1:15 pm-6:12 pm

1 stop3h 57m

$280

OntarioIdaho Falls

ONT - IDA

ONTIDA

Ontario

Wed 7/2

4:00 pm-10:39 pm

1 stop5h 39m

$357

OntarioIdaho Falls

ONT - IDA

ONTIDA

Ontario

Thu 7/3

6:39 pm-9:44 am

2 stops14h 05m

$450

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/11

Showing 1-10 of 11 results
1
2

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 June 12, 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.

Rainfall in Idaho Falls by month

Plan your trip to Idaho Falls by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Idaho Falls ranges from 0.6 - 2.0 inches per month. May is typically the wettest month, when rainfall can reach 2.0 in. July is typically the driest time to visit Idaho Falls when rainfall is around 0.6 in.

Temperature in Idaho Falls by month

Plan your trip to Idaho Falls by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Idaho Falls, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 69.8 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 23.0 F).

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 June 12, 2025.
Read reviews from past customers who have flown Alaska Airlines, Delta and Hawaiian Airlines from Ontario to Idaho Falls. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Entertainment

7.1

Boarding

8.1

Overall

8.0

Comfort

7.8

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Entertainment

7.1

Boarding

8.1

Overall

8.0

Comfort

7.8

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Delta
8.0
Very good
7,946 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Entertainment

7.1

Boarding

8.1

Overall

8.0

Comfort

7.8

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Hawaiian Airlines
7.9
Good
2,494 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Entertainment

7.1

Boarding

8.1

Overall

8.0

Comfort

7.8

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
United Airlines
7.4
Good
8,790 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Entertainment

7.1

Boarding

8.1

Overall

8.0

Comfort

7.8

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
American Airlines
7.2
Good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Entertainment

7.1

Boarding

8.1

Overall

8.0

Comfort

7.8

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

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 are the cheapest airlines flying from Ontario to Idaho Falls round-trip?

    Cheapflights users have booked flights from Ontario to Idaho Falls round-trip from $267. Other airlines that can offer you cheap pricing are Delta, from $272, and Hawaiian Airlines, from $331. You may be able to fly from Ontario to Idaho Falls for 39% less than the average price by searching for these airlines.

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

    For one-way options, check prices for Alaska Airlines. According to our data, you can fly for as low as $164. Users have also found prices from $280 and $357 on Delta and Hawaiian Airlines, respectively.

  • 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 Ontario?

Book flights to Ontario 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
Los Angeles to Spokane flights
Los Angeles to Jackson flights
Burbank to Boise flights
San Francisco to Spokane flights
San Francisco to Jackson flights
Santa Ana to Boise flights
San Francisco to Boise flights
San Jose to Boise flights
San Diego to Boise flights
Sacramento to Boise flights
San Diego to Spokane flights
Ontario to Boise flights
Ontario to Spokane flights
Ontario to Jackson flights
Las Vegas to Boise flights
San Luis Obispo to Boise flights
San Francisco to Hailey flights
San Jose to Spokane flights
Sacramento to Spokane flights
Long Beach to Spokane flights
Burbank to Spokane flights
San Diego to Jackson flights
Las Vegas to Spokane flights
Fresno to Boise flights
Oakland to Boise flights
Santa Rosa to Boise flights
Long Beach to Boise flights
Santa Ana to Spokane flights
Fresno to Spokane flights
San Francisco to West Yellowstone flights
Oakland to Spokane flights
Palm Springs to Boise flights
Santa Ana to Jackson flights
Bakersfield to Spokane flights
Sacramento to Jackson flights
Los Angeles to Idaho Falls flights
Reno to Spokane flights
San Francisco to Idaho Falls flights
San Jose to Jackson flights
Las Vegas to Jackson flights
Oakland to Jackson flights
Sacramento to Idaho Falls flights
Palm Springs to Spokane flights
San Jose to West Yellowstone flights
Santa Ana to West Yellowstone flights
Las Vegas to Idaho Falls flights
Los Angeles to Hailey flights
Ontario to Twin Falls 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 June 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$219Average$373FlexibilityNo 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.