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Idaho Falls

$129+ Cheap flights from Illinois to Idaho Falls (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 12/12. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — IDA
Oct 15 — Oct 221
Wed 10/15
Wed 10/22
1 adult, Economy
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Cheap flight deals from Illinois to Idaho Falls

Keep the following information in mind while searching for Illinois to Idaho Falls flight deals. Data was last updated September 15, 2025.

Round-trip from

$356
(United Airlines)

One-way from

$129
(Kiwi.com)

Popular in

January

Cheapest in

March

Average price

$355
From Illinois to Idaho Falls Fanning Field
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One-way flight from Illinois to Idaho Falls Fanning Field
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Highest demand for flights based on searches. 31% potential increase in price ($211 potential increase over avg. RT price).
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Cheapest flight prices on average. 8% potential price decrease ($38 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Find flight deals from Illinois to Idaho Falls

Cheapest flights from Illinois to Idaho Falls
Explore the most affordable flight options available from Illinois to Idaho Falls. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 15, 2025.

This Kiwi.com deal was found by Cheapflights users on 9/13. 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 10/27:09 pmORD - IDA
2 stops22h 05mMultiple Airlines
Mon 10/207:40 pmIDA - ORD
1 stop24h 08mMultiple Airlines
Deal found 9/13$297
This Kiwi.com deal was found by Cheapflights users on 9/13. 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.
Fri 10/36:15 amORD - IDA
1 stop10h 59mMultiple Airlines
Mon 10/207:40 pmIDA - ORD
1 stop24h 08mMultiple Airlines
Deal found 9/13$299
This Kiwi.com deal was found by Cheapflights users on 9/13. 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 10/27:09 pmORD - IDA
2 stops22h 05mMultiple Airlines
Fri 10/1710:57 pmIDA - ORD
1 stop24h 20mMultiple Airlines
Deal found 9/13$311
This Kiwi.com deal was found by Cheapflights users on 9/13. 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.
Fri 10/36:15 amORD - IDA
1 stop10h 59mMultiple Airlines
Fri 10/1710:57 pmIDA - ORD
1 stop24h 20mMultiple Airlines
Deal found 9/13$314
This Kiwi.com deal was found by Cheapflights users on 9/13. 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.
Sun 10/55:35 amORD - IDA
2 stops28h 32mMultiple Airlines
Mon 10/207:40 pmIDA - ORD
1 stop24h 08mMultiple Airlines
Deal found 9/13$351
This United Airlines deal was found by Cheapflights users on 9/14. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/85:01 amORD - IDA
1 stop5h 47mUnited Airlines
Wed 10/155:56 pmIDA - ORD
1 stop5h 03mUnited Airlines
Deal found 9/14$356
This Kiwi.com deal was found by Cheapflights users on 9/13. 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.
Mon 10/66:35 amORD - IDA
1 stop7h 14mMultiple Airlines
Mon 10/207:40 pmIDA - ORD
1 stop24h 08mMultiple Airlines
Deal found 9/13$360
This Kiwi.com deal was found by Cheapflights users on 9/13. 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.
Mon 9/296:15 amORD - IDA
1 stop9h 34mMultiple Airlines
Mon 10/207:40 pmIDA - ORD
1 stop24h 08mMultiple Airlines
Deal found 9/13$362
This Kiwi.com deal was found by Cheapflights users on 9/14. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/296:15 amORD - IDA
1 stop9h 34mMultiple Airlines
Fri 10/310:57 pmIDA - ORD
1 stop11h 54mMultiple Airlines
Deal found 9/14$365
This United Airlines deal was found by Cheapflights users on 9/13. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/2710:48 amPIA - IDA
2 stops11h 04mUnited Airlines
Wed 10/12:35 pmIDA - PIA
1 stop5h 30mUnited Airlines
Deal found 9/13$374
This United Airlines deal was found by Cheapflights users on 9/15. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/13:40 pmMLI - IDA
2 stops8h 09mUnited Airlines
Sun 10/52:35 pmIDA - MLI
1 stop5h 19mUnited Airlines
Deal found 9/15$387
This United Airlines deal was found by Cheapflights users on 9/14. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/78:39 amPIA - IDA
1 stop5h 54mUnited Airlines
Sat 10/112:35 pmIDA - PIA
1 stop5h 30mUnited Airlines
Deal found 9/14$389

Cheapflights Fare Finder

 
Customize your flight search to find flights from Illinois 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 September 15, 2025.
Use the filters below to find and compare flights from Illinois to Idaho Falls that are best for you.

Fly from

Illinois

Fly to

Idaho Falls

Route

Depart

Return

Price

ChicagoIdaho Falls

ORD - IDA

ORDIDA

Chicago O'Hare Intl

Wed 10/8

5:01 am-9:48 am

1 stop5h 47m

Idaho Falls Fanning Field

Wed 10/15

5:56 pm-11:59 pm

1 stop5h 03m

$356

PeoriaIdaho Falls

PIA - IDA

PIAIDA

Greater Peoria

Sat 9/27

10:48 am-8:52 pm

2 stops11h 04m

Idaho Falls Fanning Field

Wed 10/1

2:35 pm-9:05 pm

1 stop5h 30m

$374

ChicagoIdaho Falls

ORD - IDA

ORDIDA

Chicago O'Hare Intl

Wed 10/1

4:09 pm-10:49 pm

1 stop7h 40m

Idaho Falls Fanning Field

Wed 10/8

5:56 pm-11:59 pm

1 stop5h 03m

$381

MolineIdaho Falls

MLI - IDA

MLIIDA

Moline Quad-City

Wed 10/1

3:40 pm-10:49 pm

2 stops8h 09m

Idaho Falls Fanning Field

Sun 10/5

2:35 pm-8:54 pm

1 stop5h 19m

$387

PeoriaIdaho Falls

PIA - IDA

PIAIDA

Greater Peoria

Tue 10/7

8:39 am-1:33 pm

1 stop5h 54m

Idaho Falls Fanning Field

Sat 10/11

2:35 pm-9:05 pm

1 stop5h 30m

$389

ChicagoIdaho Falls

ORD - IDA

ORDIDA

Chicago O'Hare Intl

Mon 9/29

6:15 am-2:49 pm

1 stop9h 34m

Idaho Falls Fanning Field

Fri 10/3

10:57 pm-9:28 pm

2 stops21h 31m

$391

ChicagoIdaho Falls

ORD - IDA

ORDIDA

Chicago O'Hare Intl

Wed 11/12

7:33 am-12:39 pm

1 stop6h 06m

Idaho Falls Fanning Field

Wed 11/19

6:00 am-12:38 pm

1 stop5h 38m

$401

ChicagoIdaho Falls

ORD - IDA

ORDIDA

Chicago O'Hare Intl

Sun 9/28

2:07 pm-11:06 am

1 stop21h 59m

Idaho Falls Fanning Field

Mon 10/20

7:40 pm-8:48 pm

1 stop24h 08m

$401

ChicagoIdaho Falls

ORD - IDA

ORDIDA

Chicago O'Hare Intl

Mon 10/6

5:01 am-9:48 am

1 stop5h 47m

Idaho Falls Fanning Field

Wed 10/15

5:56 pm-11:59 pm

1 stop5h 03m

$411

ChicagoIdaho Falls

MDW - IDA

MDWIDA

Chicago Midway

Thu 10/2

6:30 am-9:23 pm

2 stops15h 53m

Idaho Falls Fanning Field

Mon 10/20

9:57 am-9:46 pm

1 stop10h 49m

$417

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/14

Showing 1-10 of 60 results
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Best time to book a flight from Illinois to Idaho Falls

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

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

Currently, October is the cheapest month in which you can book a flight from Illinois to Idaho Falls (average of $380). Flying from Illinois 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 IL to IDA?

Find hourly flight availability from Illinois 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 September 15, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Illinois to Idaho Falls as you normally would.

Weekly flight availability from Illinois to Idaho Falls

Explore weekly flight availability from Illinois to Idaho Falls. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated September 15, 2025.

The most flights from USIL to IDA are scheduled on a Monday (1 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (1 on average).

Related info for your journey

Find useful and relevant information for your journey from Illinois 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 airport do you fly into for flights to Idaho Falls from Illinois?

    Located just 3.8 mi from the city center, Idaho Falls Fanning Field (IDA) is the airport most travelers will use when flying to Idaho Falls from Illinois.

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

    Airlines like United Airlines, Delta, and American Airlines fly from Illinois to Idaho Falls in about 5h 47m. The time it takes to get you to your destination can typically vary by up to 46m. Airlines will cover a distance of 1225 mi. This flight may include one or multiple stops.

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

    For one-way options, check prices for Hawaiian Airlines. According to our data, you can fly for as low as $165. Users have also found prices from $186 and $216 on American Airlines and United Airlines, respectively.

  • What are the most popular routes from Illinois to Idaho Falls?

    When deciding which route to take from Illinois to Idaho Falls consider Chicago O'Hare Intl - Idaho Falls Fanning Field, Lambert-St Louis - Idaho Falls Fanning Field or Chicago Midway - Idaho Falls Fanning Field as they are the most popular.

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

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

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

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

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

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

    Currently, October is the cheapest month in which you can book a flight from Illinois to Idaho Falls (average of $380). Flying from Illinois 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

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Top 2 airlines flying from Illinois to Idaho Falls

Discover the top 2 airlines that operate flights from Illinois 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 September 15, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$323Average$496FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$406Average$620FlexibilityNo cancel feeOn-time69%

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