HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Idaho Falls

$130+ 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 12/6. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — IDA
Dec 3 — Dec 101
Wed 12/3
Wed 12/10
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 November 3, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$320
(Alaska Airlines)

One-way from

$130
(Kiwi.com)

Popular in

March

Cheapest in

July

Average price

$264
Provider with most accurate pricing for Ontario-Idaho Falls Fanning Field flight deals.
Search Deals
Provider most trusted by Cheapflights users for Ontario-Idaho Falls Fanning Field flights.
Search Deals
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 November 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 November 3, 2025.

This United Airlines deal was found by Cheapflights users on 11/1. 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 12/295:05 amONT - IDA
1 stop7h 25mUnited Airlines
Thu 1/82:40 pmIDA - ONT
1 stop7h 18mUnited Airlines
Deal found 11/1$391
This American Airlines deal was found by Cheapflights users on 11/1. 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 12/259:53 amONT - IDA
1 stop5h 08mAmerican Airlines
Tue 12/307:00 amIDA - ONT
1 stop10h 07mAmerican Airlines
Deal found 11/1$451
This United Airlines deal was found by Cheapflights users on 11/1. 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.
Thu 12/255:05 amONT - IDA
1 stop7h 25mUnited Airlines
Tue 12/3010:45 amIDA - ONT
2 stops24h 16mUnited Airlines
Deal found 11/1$468
This United Airlines deal was found by Cheapflights users on 11/2. 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 11/255:05 amONT - IDA
1 stop7h 30mUnited Airlines
Sat 11/294:15 pmIDA - ONT
1 stop5h 18mUnited Airlines
Deal found 11/2$469
This United Airlines deal was found by Cheapflights users on 11/2. 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 12/225:05 amONT - IDA
1 stop27h 53mUnited Airlines
Mon 1/54:05 pmIDA - ONT
1 stop6h 03mUnited Airlines
Deal found 11/2$475
This Alaska Airlines deal was found by Cheapflights users on 11/1. 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 11/124:11 pmONT - IDA
1 stop6h 48mAlaska Airlines
Sat 11/153:50 pmIDA - ONT
1 stop6h 03mAlaska Airlines
Deal found 11/1$505
This Alaska Airlines deal was found by Cheapflights users on 11/2. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/224:36 pmONT - IDA
1 stop6h 31mAlaska Airlines
Mon 1/56:00 amIDA - ONT
2 stops12h 11mAlaska Airlines
Deal found 11/2$507
This United Airlines deal was found by Cheapflights users on 11/1. 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 11/175:05 amONT - IDA
1 stop7h 30mUnited Airlines
Fri 11/212:45 pmIDA - ONT
1 stop6h 59mUnited Airlines
Deal found 11/1$516
This Alaska Airlines deal was found by Cheapflights users on 11/1. 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 12/297:19 pmONT - IDA
1 stop27h 48mAlaska Airlines
Thu 1/86:58 pmIDA - ONT
2 stops25h 18mAlaska Airlines
Deal found 11/1$521
This United Airlines deal was found by Cheapflights users on 11/1. 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 12/275:05 amONT - IDA
1 stop16h 54mUnited Airlines
Tue 12/304:05 pmIDA - ONT
1 stop6h 02mUnited Airlines
Deal found 11/1$603
This Alaska Airlines deal was found by Cheapflights users on 11/2. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/174:11 pmONT - IDA
1 stop6h 48mAlaska Airlines
Fri 11/216:00 amIDA - ONT
1 stop18h 59mAlaska Airlines
Deal found 11/2$617

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 November 3, 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

Tue 1/6

7:19 pm-10:59 pm

1 stop26h 40m

Idaho Falls Fanning Field

Sat 1/10

9:00 am-7:16 pm

2 stops11h 16m

$351

OntarioIdaho Falls

ONT - IDA

ONTIDA

Ontario

Mon 12/29

5:05 am-1:30 pm

1 stop7h 25m

Idaho Falls Fanning Field

Thu 1/8

2:40 pm-8:58 pm

1 stop7h 18m

$391

OntarioIdaho Falls

ONT - IDA

ONTIDA

Ontario

Mon 1/5

12:48 pm-6:18 pm

2 stops52h 30m

Idaho Falls Fanning Field

Sat 1/10

9:00 am-8:36 pm

1 stop12h 36m

$401

OntarioIdaho Falls

ONT - IDA

ONTIDA

Ontario

Thu 12/25

9:53 am-4:01 pm

1 stop5h 08m

Idaho Falls Fanning Field

Tue 12/30

7:00 am-4:07 pm

1 stop10h 07m

$451

OntarioIdaho Falls

ONT - IDA

ONTIDA

Ontario

Sat 1/3

4:47 pm-10:21 pm

1 stop4h 34m

Idaho Falls Fanning Field

Fri 1/9

2:07 pm-10:48 pm

1 stop9h 41m

$453

OntarioIdaho Falls

ONT - IDA

ONTIDA

Ontario

Tue 1/6

4:36 pm-12:07 am

1 stop6h 31m

Idaho Falls Fanning Field

Wed 1/7

6:58 pm-5:03 pm

2 stops23h 05m

$457

OntarioIdaho Falls

ONT - IDA

ONTIDA

Ontario

Thu 12/25

5:05 am-1:30 pm

1 stop7h 25m

Idaho Falls Fanning Field

Tue 12/30

10:45 am-10:01 am

2 stops24h 16m

$468

OntarioIdaho Falls

ONT - IDA

ONTIDA

Ontario

Mon 12/22

5:05 am-9:58 am

1 stop27h 53m

Idaho Falls Fanning Field

Mon 1/5

4:05 pm-9:08 pm

1 stop6h 03m

$475

OntarioIdaho Falls

ONT - IDA

ONTIDA

Ontario

Sat 12/6

3:20 pm-2:36 pm

2 stops46h 16m

$130

OntarioIdaho Falls

ONT - IDA

ONTIDA

Ontario

Sun 12/14

5:18 pm-2:36 pm

2 stops20h 18m

$151

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/2

Showing 1-10 of 14 results
1
2

Compare providers for flights from Ontario to Idaho Falls

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 Ontario to Idaho Falls in November.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
PricelinePrice Accuracy1 starTrust 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 Ontario-Idaho Falls flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Ontario-Idaho Falls flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from Ontario-Idaho Falls flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Ontario-Idaho Falls 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 Ontario-Idaho Falls 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 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, November is the cheapest month in which you can book a flight from Ontario to Idaho Falls (average of $60). Flying from Ontario to Idaho Falls in December is currently the most expensive (average of $251). 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 November 3, 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 20% versus a flight in the evening.

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 November 3, 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
7.9
Good
8,002 reviews

Comfort

7.9

Food

7.3

Entertainment

7.9

Crew

8.5

Overall

7.9

Boarding

8.2

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
7.9
Good
8,002 reviews
Delta
7.9
Good
8,002 reviews

Comfort

7.9

Food

7.3

Entertainment

7.9

Crew

8.5

Overall

7.9

Boarding

8.2

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.

  • How long is the flight from Ontario to Idaho Falls?

    Alaska Airlines and United Airlines can get you from Ontario to Idaho Falls in just under 7h 25m. Your travel time can differ by up to 19h 15m. There are 717 mi between Ontario and Idaho Falls. Both multi-stop and nonstop flights can be found to your destination and back.

  • 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, November is the cheapest month in which you can book a flight from Ontario to Idaho Falls (average of $60). Flying from Ontario to Idaho Falls in December is currently the most expensive (average of $251). 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 Spokane flights
Los Angeles to Boise flights
San Francisco to Boise flights
San Francisco to Jackson flights
Los Angeles to Jackson flights
Santa Ana to Boise flights
Burbank to Boise flights
Ontario to Boise flights
San Francisco to Spokane flights
Ontario to Spokane flights
San Diego to Boise flights
Las Vegas to Boise flights
San Francisco to Hailey flights
Sacramento to Boise flights
San Diego to Spokane flights
Burbank to Spokane flights
Sacramento to Spokane flights
Santa Ana to Spokane flights
Los Angeles to Hailey flights
Oakland to Boise flights
Fresno to Boise flights
San Jose to Spokane flights
San Jose to Boise flights
Ontario to Jackson flights
Las Vegas to Spokane flights
Palm Springs to Boise flights
San Diego to Jackson flights
Oakland to Spokane flights
Long Beach to Boise flights
Burbank to Jackson flights
Los Angeles to Idaho Falls flights
Long Beach to Spokane flights
Fresno to Spokane flights
San Jose to Pocatello flights
San Jose to Idaho Falls flights
Santa Ana to Jackson flights
San Jose to Jackson flights
Reno to Spokane flights
San Luis Obispo to Spokane flights
Oakland to Jackson flights
San Diego to Hailey flights
Sacramento to Jackson flights
Santa Barbara to Spokane flights
San Francisco to Idaho Falls flights
Fresno to Jackson flights
Medford to Boise flights
Bakersfield to Boise flights
San Francisco to Pocatello flights
Oakland to Idaho 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 November 3, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$219Average$424FlexibilityNo 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.