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$151+ 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 7/10. Fares are subject to change and may not be available on all flights or dates of travel.
IDA — ONT
jun. 17 — jun. 241
mar. 6/17
mar. 6/24
1 adult, Economy
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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 junio 12, 2025.

Round-trip from

$267
(Alaska Airlines)

One-way from

$151
(Delta)

Popular in

March

Cheapest in

June

Average price

$164
From Idaho Falls Fanning Field to Ontario
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One-way flight from Idaho Falls Fanning Field to Ontario
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Highest demand for flights based on searches. 22% potential increase in price ($118 potential increase over avg. RT price).
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Cheapest flight prices on average. 5% potential price decrease ($23 potential savings vs. average RT price).
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Average for round-trip flights in June 2025
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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 junio 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.
mar. 9/26:13 amIDA - ONT
1 stop5h 31mAlaska Airlines
mié. 9/106:00 amONT - IDA
1 stop8h 23mAlaska 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.
jue. 8/76:00 amIDA - ONT
1 stop3h 47mDelta
mar. 8/126:05 amONT - IDA
1 stop3h 34mDelta
Deal found 6/11$284
This Hawaiian Airlines deal was found by Cheapflights users on 6/9. 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.
mar. 6/246:15 amIDA - ONT
1 stop5h 50mHawaiian Airlines
mar. 7/222:21 pmONT - IDA
1 stop7h 18mHawaiian Airlines
Deal found 6/9$319
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.
vie. 7/184:13 pmIDA - ONT
1 stop5h 41mUnited Airlines
vie. 7/255:05 amONT - IDA
1 stop7h 27mUnited Airlines
Deal found 6/10$399
This United deal was found by Cheapflights users on 6/12. 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 United is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 7/252:38 pmIDA - ONT
1 stop7h 16mMultiple Airlines
mar. 7/292:21 pmONT - IDA
1 stop7h 18mMultiple Airlines
Deal found 6/12$540
This American 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 6/261:51 pmIDA - ONT
1 stop9h 23mAmerican Airlines
dom. 6/2912:59 amONT - IDA
1 stop19h 36mAmerican Airlines
Deal found 6/10$624

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 junio 12, 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

mar. 9/2

6:13 am-10:44 am

1 stop5h 31m

Ontario

mié. 9/10

6:00 am-3:23 pm

1 stop8h 23m

$267

Idaho FallsOntario

IDA - ONT

IDAONT

Idaho Falls Fanning Field

jue. 8/7

6:00 am-8:47 am

1 stop3h 47m

Ontario

mar. 8/12

6:05 am-10:39 am

1 stop3h 34m

$284

Idaho FallsOntario

IDA - ONT

IDAONT

Idaho Falls Fanning Field

mar. 6/24

6:15 am-11:05 am

1 stop5h 50m

Ontario

mar. 7/22

2:21 pm-10:39 pm

1 stop7h 18m

$319

Idaho FallsOntario

IDA - ONT

IDAONT

Idaho Falls Fanning Field

vie. 7/18

4:13 pm-8:54 pm

1 stop5h 41m

Ontario

vie. 7/25

5:05 am-1:32 pm

1 stop7h 27m

$399

Idaho FallsOntario

IDA - ONT

IDAONT

Idaho Falls Fanning Field

vie. 7/25

2:38 pm-8:54 pm

1 stop7h 16m

Ontario

mar. 7/29

2:21 pm-10:39 pm

1 stop7h 18m

$540

Idaho FallsOntario

IDA - ONT

IDAONT

Idaho Falls Fanning Field

jue. 6/26

1:51 pm-10:14 pm

1 stop9h 23m

Ontario

dom. 6/29

12:59 am-9:35 pm

1 stop19h 36m

$624

Idaho FallsOntario

IDA - ONT

IDAONT

Idaho Falls Fanning Field

jue. 7/10

6:00 am-8:47 am

1 stop3h 47m

$151

Idaho FallsOntario

IDA - ONT

IDAONT

Idaho Falls Fanning Field

lun. 6/30

4:13 pm-8:54 pm

1 stop5h 41m

$216

Idaho FallsOntario

IDA - ONT

IDAONT

Idaho Falls Fanning Field

mar. 6/17

6:15 am-11:05 am

1 stop5h 50m

$230

Idaho FallsOntario

IDA - ONT

IDAONT

Idaho Falls Fanning Field

vie. 6/20

7:00 am-4:13 pm

2 stops10h 13m

$266

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/10

Showing 1-10 of 11 results
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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 junio 12, 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.

Rainfall in Ontario by month

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

In terms of precipitation, rainfall in Ontario ranges from 0.1 - 3.4 inches per month. February is typically the wettest month, when rainfall can reach 3.4 in. June is typically the driest time to visit Ontario when rainfall is around 0.1 in.

Temperature in Ontario by month

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

If weather is an important factor for your trip to Ontario, use this chart to help with planning. For those seeking warmer temperatures, August is the ideal time of year to visit, when temperatures reach an average of 78.8 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 53.6 F).

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 junio 12, 2025.
To help decide which airline to fly from Idaho Falls to Ontario, see what other customers have to say about Alaska Airlines, Delta and Hawaiian Airlines. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Food

7.1

Boarding

8.1

Comfort

7.8

Entertainment

7.1

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

Overall

8.0

Food

7.1

Boarding

8.1

Comfort

7.8

Entertainment

7.1

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

Overall

8.0

Food

7.1

Boarding

8.1

Comfort

7.8

Entertainment

7.1

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

Overall

8.0

Food

7.1

Boarding

8.1

Comfort

7.8

Entertainment

7.1

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

Overall

8.0

Food

7.1

Boarding

8.1

Comfort

7.8

Entertainment

7.1

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

Overall

8.0

Food

7.1

Boarding

8.1

Comfort

7.8

Entertainment

7.1

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 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.

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

    Flying on Alaska Airlines is currently your cheapest option to Ontario, with prices starting at $267. Additional round-trip tickets that might be worth considering are offered by Delta and Hawaiian Airlines, with the lowest prices starting at $284 and $319, respectively. Alaska Airlines is priced at 35% lower than the current average price of a flight leaving 3 months from now.

  • 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 $151. Users have also found prices from $216 and $230 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

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Alternative routes for Idaho Falls to Ontario

See prices for flight routes from nearby airports that may be better suited for you.
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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 junio 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$164Average$468FlexibilityNo cancel feeOn-timeN/A

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