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Illinois

$117+ Cheap flights from Idaho Falls (IDA) to Illinois

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 2/23. Fares are subject to change and may not be available on all flights or dates of travel.
IDA — ORD
Feb 26 — Mar 51
Thu 2/26
Thu 3/5
1 adult, Economy
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Cheap flight deals from Idaho Falls to Illinois

Cheapest flights from Idaho Falls to Illinois
Explore the most affordable flight options available from Idaho Falls to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 27, 2026.

This Alaska Airlines deal was found by Cheapflights users on 1/25. 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.
Fri 10/304:00 pm
IDA
-
ORD
1 stop6h 41m
Alaska Airlines
Sat 10/318:00 am
ORD
-
IDA
1 stop8h 29m
Alaska Airlines
Deal found 1/25$269
This United Airlines deal was found by Cheapflights users on 1/25. 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 5/216:03 pm
IDA
-
ORD
1 stop5h 41m
United Airlines
Mon 5/255:00 am
ORD
-
IDA
1 stop5h 55m
United Airlines
Deal found 1/25$287
This United Airlines deal was found by Cheapflights users on 1/25. 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 6/196:03 pm
IDA
-
ORD
1 stop5h 41m
United Airlines
Tue 6/235:00 am
ORD
-
IDA
1 stop5h 55m
United Airlines
Deal found 1/25$299
This Alaska Airlines deal was found by Cheapflights users on 1/25. 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.
Fri 2/275:20 pm
IDA
-
ORD
1 stop19h 51m
Alaska Airlines
Wed 3/48:20 am
ORD
-
IDA
2 stops16h 16m
Alaska Airlines
Deal found 1/25$311
This United Airlines deal was found by Cheapflights users on 1/26. 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 3/62:35 pm
IDA
-
STL
1 stop7h 59m
United Airlines
Sat 3/147:41 am
STL
-
IDA
2 stops8h 59m
United Airlines
Deal found 1/26$325
This Alaska Airlines deal was found by Cheapflights users on 1/26. 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.
Fri 2/278:00 am
IDA
-
ORD
1 stop7h 33m
Alaska Airlines
Thu 3/53:54 pm
ORD
-
IDA
1 stop8h 42m
Alaska Airlines
Deal found 1/26$334
This Alaska Airlines deal was found by Cheapflights users on 1/27. 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.
Fri 3/65:20 pm
IDA
-
ORD
1 stop19h 51m
Alaska Airlines
Thu 3/127:40 am
ORD
-
IDA
2 stops16h 56m
Alaska Airlines
Deal found 1/27$343
This Delta deal was found by Cheapflights users on 1/25. 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.
Fri 4/175:47 am
IDA
-
ORD
1 stop5h 04m
Delta
Mon 4/202:09 pm
ORD
-
IDA
1 stop5h 08m
Delta
Deal found 1/25$345
This Kiwi.com deal was found by Cheapflights users on 1/26. 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 4/1310:21 pm
IDA
-
ORD
1 stop7h 26m
Multiple Airlines
Thu 4/1610:55 am
ORD
-
IDA
2 stops29h 32m
Multiple Airlines
Deal found 1/26$359
This United Airlines deal was found by Cheapflights users on 1/26. 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 2/122:40 pm
IDA
-
STL
1 stop4h 46m
United Airlines
Sat 2/214:30 pm
STL
-
IDA
1 stop5h 28m
United Airlines
Deal found 1/26$371
This American Airlines deal was found by Cheapflights users on 1/27. 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.
Wed 8/512:46 pm
IDA
-
STL
1 stop6h 33m
American Airlines
Mon 8/107:23 am
STL
-
IDA
1 stop5h 47m
American Airlines
Deal found 1/27$395
This United Airlines deal was found by Cheapflights users on 1/27. 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 3/42:40 pm
IDA
-
STL
1 stop7h 41m
United Airlines
Sat 3/145:00 am
STL
-
IDA
2 stops11h 40m
United Airlines
Deal found 1/27$399

Find flight deals from Idaho Falls to Illinois

Keep the following information in mind while searching for Idaho Falls to Illinois flight deals. Data was last updated January 27, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$253
(Alaska Airlines)

One-way from

$117
(Kiwi.com)

Popular in

March

Cheapest in

June

Good round-trip deal

$422 or less
Provider with most accurate pricing for Idaho Falls Fanning Field-Chicago (CHI) flight deals.
Search Deals
Provider most trusted by Cheapflights users for Idaho Falls Fanning Field-Chicago (CHI) flights.
Search Deals
From Idaho Falls Fanning Field to Illinois
Search Deals
One-way flight from Idaho Falls Fanning Field to Illinois
Search Deals
Highest demand for flights based on searches. 14% potential increase in price ($77 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 8% potential price decrease ($38 potential savings vs. average RT price).
Search Deals
Price to beat on a round-trip flight from Idaho Falls Fanning Field to Illinois.
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Idaho Falls to Illinois 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 January 27, 2026.
Use the filters below to find and compare flights from Idaho Falls to Illinois that are best for you.

Fly from

Idaho Falls

Fly to

Illinois

Route

Depart

Return

Price

Idaho FallsChicago

IDA - ORD

IDAORD

Idaho Falls Fanning Field

Thu 5/21

6:03 pm-12:44 am

1 stop5h 41m

Chicago O'Hare Intl

Tue 5/26

7:00 am-1:24 pm

1 stop7h 24m

$269

Idaho FallsChicago

IDA - ORD

IDAORD

Idaho Falls Fanning Field

Fri 2/27

5:20 pm-2:11 pm

1 stop19h 51m

Chicago O'Hare Intl

Thu 3/5

3:54 pm-11:36 pm

1 stop8h 42m

$269

Idaho FallsChicago

IDA - ORD

IDAORD

Idaho Falls Fanning Field

Fri 3/6

5:20 pm-2:11 pm

1 stop19h 51m

Chicago O'Hare Intl

Thu 3/12

7:00 am-4:43 pm

1 stop10h 43m

$269

Idaho FallsChicago

IDA - ORD

IDAORD

Idaho Falls Fanning Field

Thu 5/21

6:03 pm-12:44 am

1 stop5h 41m

Chicago O'Hare Intl

Mon 5/25

5:00 am-9:55 am

1 stop5h 55m

$287

Idaho FallsChicago

IDA - ORD

IDAORD

Idaho Falls Fanning Field

Fri 6/19

6:03 pm-12:44 am

1 stop5h 41m

Chicago O'Hare Intl

Tue 6/23

5:00 am-9:55 am

1 stop5h 55m

$299

Idaho FallsChicago

IDA - ORD

IDAORD

Idaho Falls Fanning Field

Fri 2/27

5:20 pm-2:11 pm

1 stop19h 51m

Chicago O'Hare Intl

Wed 3/4

7:00 am-4:43 pm

1 stop10h 43m

$318

Idaho FallsSt. Louis

IDA - STL

IDASTL

Idaho Falls Fanning Field

Fri 3/6

2:35 pm-11:34 pm

1 stop7h 59m

Lambert-St Louis

Sat 3/14

7:41 am-3:40 pm

2 stops8h 59m

$325

Idaho FallsChicago

IDA - ORD

IDAORD

Idaho Falls Fanning Field

Tue 2/10

6:35 pm-10:05 am

2 stops14h 30m

Chicago O'Hare Intl

Sat 2/14

5:15 pm-10:21 pm

1 stop6h 06m

$369

Idaho FallsChicago

IDA - ORD

IDAORD

Idaho Falls Fanning Field

Thu 5/7

4:06 pm-11:59 pm

1 stop6h 53m

Chicago O'Hare Intl

Tue 5/12

2:13 pm-1:06 pm

1 stop23h 53m

$371

Idaho FallsSt. Louis

IDA - STL

IDASTL

Idaho Falls Fanning Field

Thu 2/12

2:40 pm-8:26 pm

1 stop4h 46m

Lambert-St Louis

Sat 2/21

4:30 pm-8:58 pm

1 stop5h 28m

$371

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/27

Showing 1-10 of 41 results
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Best time to book a flight from Idaho Falls to Illinois

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

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

Currently, June is the cheapest month in which you can book a flight from Idaho Falls to Illinois (average of $193). Flying from Idaho Falls to Illinois in July is currently the most expensive (average of $447). 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 Illinois

Get insights into the airlines that provide service to Illinois. 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 Illinois. Reviews last updated January 27, 2026.
Read through reviews of airlines operating flights from Idaho Falls to Illinois, such as Delta, United Airlines, and American Airlines. 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
8,118 reviews

Crew

8.5

Entertainment

7.8

Boarding

8.1

Comfort

7.9

Food

7.2

Overall

7.9

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
Delta
7.9
Good
8,118 reviews
Delta
7.9
Good
8,118 reviews

Crew

8.5

Entertainment

7.8

Boarding

8.1

Comfort

7.9

Food

7.2

Overall

7.9

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
United Airlines
7.4
Good
9,204 reviews
Delta
7.9
Good
8,118 reviews

Crew

8.5

Entertainment

7.8

Boarding

8.1

Comfort

7.9

Food

7.2

Overall

7.9

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
American Airlines
7.2
Good
11,197 reviews
Delta
7.9
Good
8,118 reviews

Crew

8.5

Entertainment

7.8

Boarding

8.1

Comfort

7.9

Food

7.2

Overall

7.9

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.

Related info for your journey

Find useful and relevant information for your journey from Idaho Falls to Illinois. 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 from for flights from Idaho Falls to 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 Illinois from Idaho Falls.

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

    Airlines like United Airlines and Alaska Airlines fly from Idaho Falls to Illinois in about 5h 41m. The time it takes to get you to your destination can typically vary by up to 14h 10m. The distance between Idaho Falls and Illinois is about 1225 mi. Both multi-stop and nonstop flights can be found to your destination and back.

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

    The most popular flight routes from Idaho Falls to Illinois are Idaho Falls Fanning Field - Chicago O'Hare Intl, Idaho Falls Fanning Field - Chicago Midway and Idaho Falls Fanning Field - Lambert-St Louis.

  • What are the cheapest flights from Idaho Falls to Illinois?

    Looking for the cheapest flight from Idaho Falls to Illinois? While on average our users pay $627, our data indicates the cheapest price to be $359. The most popular route (Idaho Falls Fanning Field - Chicago O'Hare Intl), is priced around $269.

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

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

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

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

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

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

    Currently, June is the cheapest month in which you can book a flight from Idaho Falls to Illinois (average of $193). Flying from Idaho Falls to Illinois in July is currently the most expensive (average of $447). 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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See prices for flight routes from nearby airports that may be better suited for you.
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Top 2 airlines flying from Idaho Falls to Illinois

Discover the top 2 airlines that operate flights from Idaho Falls to Illinois. 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 January 27, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$299Average$485FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$323Average$391FlexibilityNo cancel feeOn-time71%

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