HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Ontario

$125+ 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 4/13. Fares are subject to change and may not be available on all flights or dates of travel.
IDA — ONT
abr. 14 — abr. 211
mar. 4/14
mar. 4/21
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

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 marzo 15, 2026.

This Alaska Airlines deal was found by Cheapflights users on 3/11. 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.
mar. 4/284:06 pm
IDA
-
ONT
1 stop7h 26m
Alaska Airlines
mar. 5/1210:39 am
ONT
-
IDA
1 stop27h 47m
Alaska Airlines
Deal found 3/11$283
This Expedia deal was found by Cheapflights users on 3/14. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 5/86:00 am
IDA
-
ONT
1 stop9h 32m
Alaska Airlines
mar. 5/125:56 pm
ONT
-
IDA
1 stop18h 21m
Alaska Airlines
Deal found 3/14$304
This Delta deal was found by Cheapflights users on 3/15. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 4/136:58 pm
IDA
-
ONT
1 stop5h 46m
Delta
sáb. 5/95:55 pm
ONT
-
IDA
1 stop3h 47m
Delta
Deal found 3/15$314
This Kiwi.com deal was found by Cheapflights users on 3/13. 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.
vie. 4/174:17 pm
IDA
-
ONT
2 stops19h 27m
Multiple Airlines
dom. 4/199:09 pm
ONT
-
IDA
1 stop17h 18m
Multiple Airlines
Deal found 3/13$322
This Delta deal was found by Cheapflights users on 3/11. 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.
mié. 4/296:58 pm
IDA
-
ONT
1 stop5h 46m
Delta
sáb. 5/25:59 pm
ONT
-
IDA
1 stop3h 41m
Delta
Deal found 3/11$328
This Alaska Airlines deal was found by Cheapflights users on 3/12. 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.
vie. 5/14:06 pm
IDA
-
ONT
1 stop18h 39m
Alaska Airlines
vie. 5/87:59 pm
ONT
-
IDA
1 stop25h 41m
Alaska Airlines
Deal found 3/12$330
This Delta deal was found by Cheapflights users on 3/15. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 4/136:58 pm
IDA
-
ONT
1 stop5h 46m
Delta
jue. 5/76:00 am
ONT
-
IDA
1 stop3h 47m
Delta
Deal found 3/15$331
This American Airlines deal was found by Cheapflights users on 3/12. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 4/297:48 am
IDA
-
ONT
1 stop4h 46m
American Airlines
sáb. 5/24:52 pm
ONT
-
IDA
1 stop5h 47m
American Airlines
Deal found 3/12$333
This Delta deal was found by Cheapflights users on 3/15. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 4/146:58 pm
IDA
-
ONT
1 stop5h 46m
Delta
sáb. 5/95:55 pm
ONT
-
IDA
1 stop3h 47m
Delta
Deal found 3/15$339
This Delta deal was found by Cheapflights users on 3/15. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 4/136:58 pm
IDA
-
ONT
1 stop5h 46m
Delta
lun. 5/116:00 am
ONT
-
IDA
1 stop3h 47m
Delta
Deal found 3/15$356

Find 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 marzo 15, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$283
(Alaska Airlines)

One-way from

$125
(Kiwi.com)

Popular in

November

Cheapest in

June

Average price

$634
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. 29% potential increase in price ($163 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 6% potential price decrease ($26 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 2026
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 marzo 15, 2026.
Use the filters below to find and compare flights from Idaho Falls to Ontario that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Idaho FallsOntario

IDA - ONT

IDAONT

Idaho Falls Fanning Field

mié. 4/22

4:06 pm-10:32 pm

1 stop7h 26m

Ontario

sáb. 4/25

3:26 pm-10:40 pm

1 stop6h 14m

$375

Idaho FallsOntario

IDA - ONT

IDAONT

Idaho Falls Fanning Field

vie. 5/1

4:06 pm-2:32 pm

1 stop23h 26m

Ontario

vie. 5/8

7:59 pm-10:40 pm

1 stop25h 41m

$389

Idaho FallsOntario

IDA - ONT

IDAONT

Idaho Falls Fanning Field

mar. 9/8

6:15 am-11:09 am

1 stop5h 54m

Ontario

sáb. 9/12

4:00 pm-10:39 pm

1 stop5h 39m

$395
Quickest round-trip

Idaho FallsOntario

IDA - ONT

IDAONT

Idaho Falls Fanning Field

mar. 7/28

6:10 am-9:01 am

1 stop3h 51m

Ontario

dom. 8/2

6:00 am-10:39 am

1 stop3h 39m

$448

Idaho FallsOntario

IDA - ONT

IDAONT

Idaho Falls Fanning Field

vie. 7/24

6:10 am-9:01 am

1 stop3h 51m

Ontario

jue. 7/30

1:00 pm-6:14 pm

1 stop4h 14m

$477

Idaho FallsOntario

IDA - ONT

IDAONT

Idaho Falls Fanning Field

sáb. 7/25

6:50 pm-9:44 pm

1 stop3h 54m

Ontario

vie. 7/31

1:00 pm-6:14 pm

1 stop4h 14m

$479

Idaho FallsOntario

IDA - ONT

IDAONT

Idaho Falls Fanning Field

dom. 3/29

6:55 pm-11:51 pm

1 stop5h 56m

Ontario

mar. 4/7

5:09 pm-10:16 pm

1 stop4h 07m

$490

Idaho FallsOntario

IDA - ONT

IDAONT

Idaho Falls Fanning Field

lun. 3/30

5:59 pm-11:59 pm

1 stop7h 00m

Ontario

lun. 4/6

6:00 am-4:19 pm

1 stop9h 19m

$492

Idaho FallsOntario

IDA - ONT

IDAONT

Idaho Falls Fanning Field

mié. 4/1

4:59 pm-11:59 pm

1 stop8h 00m

Ontario

mié. 4/8

6:00 am-10:52 pm

1 stop15h 52m

$512
Cheapest one-way

Idaho FallsOntario

IDA - ONT

IDAONT

Idaho Falls Fanning Field

vie. 6/19

10:56 pm-8:16 pm

1 stop22h 20m

$173

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/12

Showing 1-10 of 15 resultsSorted by cheapest first
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 March.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice 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, September is the cheapest month in which you can book a flight from Idaho Falls to Ontario (average of $92). Flying from Idaho Falls to Ontario in June is currently the most expensive (average of $164). 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.

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 marzo 15, 2026.
Peruse reviews from past customers who have flown with Delta and United Airlines 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
8,293 reviews

Overall

7.9

Boarding

8.1

Entertainment

7.8

Comfort

7.9

Food

7.2

Crew

8.5

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
8,293 reviews
Delta
7.9
Good
8,293 reviews

Overall

7.9

Boarding

8.1

Entertainment

7.8

Comfort

7.9

Food

7.2

Crew

8.5

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
United Airlines
7.4
Good
9,427 reviews
Delta
7.9
Good
8,293 reviews

Overall

7.9

Boarding

8.1

Entertainment

7.8

Comfort

7.9

Food

7.2

Crew

8.5

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 46m. Delta provides one of the quickest options available for as low as $381. Airlines will cover a distance of 717 mi. Both multi-stop and nonstop flights can be found to your destination and back.

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

    Flying on United Airlines is currently your cheapest option to Ontario, with prices starting at $143. Another option worth looking into is Delta, starting at $155 round trip. United Airlines is priced at 64% 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, September is the cheapest month in which you can book a flight from Idaho Falls to Ontario (average of $92). Flying from Idaho Falls to Ontario in June is currently the most expensive (average of $164). 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
Spokane to Las Vegas flights
Boise to Los Angeles flights
Spokane to Los Angeles flights
Boise to San Francisco flights
Spokane to San Diego flights
Boise to San Diego flights
Boise to Burbank flights
Boise to San Jose flights
Spokane to San Francisco flights
Spokane to Sacramento flights
Boise to Santa Ana flights
Spokane to Ontario flights
Boise to Sacramento flights
Boise to Palm Springs flights
Spokane to Santa Ana flights
Boise to Ontario flights
Spokane to San Jose flights
Spokane to Palm Springs flights
Idaho Falls to Las Vegas flights
Spokane to Oakland flights
Boise to Reno flights
Idaho Falls to Los Angeles flights
Lewiston to Yuma flights
Idaho Falls to Santa Ana flights
Jackson to Las Vegas flights
Hailey to San Francisco flights
Jackson to Los Angeles flights
Boise to Long Beach flights
Boise to Oakland flights
Boise to Santa Barbara flights
Jackson to San Diego flights
Spokane to Reno flights
Boise to San Luis Obispo flights
Jackson to Sacramento flights
Spokane to Monterey flights
Spokane to Burbank flights
Jackson to San Francisco flights
Boise to Fresno flights
Hailey to Las Vegas flights
Idaho Falls to Fresno flights
Boise to Medford flights
Idaho Falls to San Diego flights
Spokane to Long Beach flights
Twin Falls to Las Vegas flights
Idaho Falls to Sacramento flights
Idaho Falls to San Francisco flights
Pocatello to Las Vegas flights
Boise to Santa Rosa flights

Top 2 airlines flying from Idaho Falls to Ontario

Discover the top 2 airlines 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 marzo 15, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$143Average$538FlexibilityNo cancel feeOn-time69%
DeltaCheapest$155Average$398FlexibilityNo 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.