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Idaho Falls

$146+ 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 12/2. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — IDA
Jul 9 — Jul 161
Thu 7/9
Thu 7/16
1 adult, Economy
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Cheap 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 June 9, 2026.

This American Airlines deal was found by Cheapflights users on 6/7. 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 10/79:40 am
ORD
-
IDA
Nonstop3h 40m
American Airlines
Wed 10/141:43 pm
IDA
-
ORD
Nonstop3h 17m
American Airlines
Deal found 6/7$271
This United Airlines deal was found by Cheapflights users on 6/4. 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 7/49:00 am
ORD
-
IDA
Nonstop3h 45m
United Airlines
Sat 7/115:54 pm
IDA
-
ORD
1 stop5h 50m
United Airlines
Deal found 6/4$281
This American Airlines deal was found by Cheapflights users on 6/7. 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.
Tue 8/410:50 am
ORD
-
IDA
Nonstop3h 33m
American Airlines
Fri 8/141:43 pm
IDA
-
ORD
Nonstop3h 35m
American Airlines
Deal found 6/7$295
This United Airlines deal was found by Cheapflights users on 6/8. 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 7/85:00 am
ORD
-
IDA
1 stop5h 50m
United Airlines
Tue 7/145:54 pm
IDA
-
ORD
1 stop5h 50m
United Airlines
Deal found 6/8$306
This Alaska Airlines deal was found by Cheapflights users on 6/7. 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.
Sat 10/249:00 am
ORD
-
IDA
1 stop7h 35m
Alaska Airlines
Wed 10/281:46 pm
IDA
-
ORD
1 stop9h 13m
Alaska Airlines
Deal found 6/7$310
This United Airlines deal was found by Cheapflights users on 6/7. 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 8/45:00 am
ORD
-
IDA
1 stop5h 50m
United Airlines
Fri 8/144:04 pm
IDA
-
ORD
1 stop5h 42m
United Airlines
Deal found 6/7$315
This Alaska Airlines deal was found by Cheapflights users on 6/7. 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.
Sat 11/147:00 am
STL
-
IDA
1 stop9h 17m
Alaska Airlines
Wed 11/186:04 am
IDA
-
STL
1 stop7h 11m
Alaska Airlines
Deal found 6/7$319
This Expedia deal was found by Cheapflights users on 6/7. 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.
Wed 8/126:00 am
ORD
-
IDA
1 stop10h 37m
Alaska Airlines
Mon 8/174:14 pm
IDA
-
ORD
1 stop11h 46m
Alaska Airlines
Deal found 6/7$329
This United Airlines deal was found by Cheapflights users on 6/7. 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.
Sun 6/285:00 am
ORD
-
IDA
1 stop5h 50m
United Airlines
Sat 7/410:35 am
IDA
-
ORD
1 stop5h 30m
United Airlines
Deal found 6/7$339
This Kiwi.com deal was found by Cheapflights users on 6/4. 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 8/99:15 pm
PIA
-
IDA
1 stop12h 44m
Allegiant Air
Fri 8/149:49 am
IDA
-
PIA
1 stop29h 11m
Allegiant Air
Deal found 6/4$356
This United Airlines deal was found by Cheapflights users on 6/7. 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 7/155:10 am
STL
-
IDA
1 stop5h 40m
United Airlines
Wed 7/224:14 pm
IDA
-
STL
1 stop6h 43m
United Airlines
Deal found 6/7$365
This Expedia deal was found by Cheapflights users on 6/8. 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.
Mon 8/177:56 pm
STL
-
IDA
1 stop20h 41m
Alaska Airlines
Thu 8/203:57 pm
IDA
-
STL
1 stop24h 13m
Alaska Airlines
Deal found 6/8$369

Find 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 June 9, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$271
(American Airlines)

One-way from

$146
(Alaska Airlines)

Popular in

January

Cheapest in

October

Average price

$460

Good round-trip deal

$380 or less
Provider with most accurate pricing for Chicago (CHI)-Idaho Falls Fanning Field flight deals.
Search Deals
Provider most trusted by Cheapflights users for Chicago (CHI)-Idaho Falls Fanning Field flights.
Search Deals
From Illinois to Idaho Falls Fanning Field
Search Deals
One-way flight from Illinois to Idaho Falls Fanning Field
Search Deals
Highest demand for flights based on searches. 6% potential increase in price ($31 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($15 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in June 2026
Search Deals
Price to beat on a round-trip flight from Illinois to Idaho Falls Fanning Field.
Search Deals

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 June 9, 2026.
Use the filters below to find and compare flights from Illinois to Idaho Falls that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip
Quickest round-trip

ChicagoIdaho Falls

ORD - IDA

ORDIDA

Chicago O'Hare Intl

Sat 9/5

9:00 am-11:38 am

Nonstop3h 38m

Idaho Falls Fanning Field

Tue 9/15

4:04 pm-11:59 pm

1 stop6h 55m

$281

ChicagoIdaho Falls

ORD - IDA

ORDIDA

Chicago O'Hare Intl

Sat 10/24

9:00 am-3:35 pm

1 stop7h 35m

Idaho Falls Fanning Field

Wed 10/28

1:46 pm-11:59 pm

1 stop9h 13m

$315

St. LouisIdaho Falls

STL - IDA

STLIDA

Lambert-St Louis

Sat 8/15

5:00 pm-10:32 pm

1 stop6h 32m

Idaho Falls Fanning Field

Mon 8/17

7:00 pm-12:41 am

1 stop4h 41m

$319

St. LouisIdaho Falls

STL - IDA

STLIDA

Lambert-St Louis

Sat 11/14

7:00 am-3:17 pm

1 stop9h 17m

Idaho Falls Fanning Field

Wed 11/18

6:04 am-2:15 pm

1 stop7h 11m

$319

ChicagoIdaho Falls

ORD - IDA

ORDIDA

Chicago O'Hare Intl

Fri 10/23

7:30 am-12:27 pm

1 stop5h 57m

Idaho Falls Fanning Field

Mon 10/26

1:10 pm-9:53 pm

1 stop7h 43m

$349

ChicagoIdaho Falls

ORD - IDA

ORDIDA

Chicago O'Hare Intl

Wed 8/12

5:00 am-9:51 am

1 stop5h 51m

Idaho Falls Fanning Field

Sat 8/15

4:04 pm-10:46 pm

1 stop5h 42m

$354

ChicagoIdaho Falls

ORD - IDA

ORDIDA

Chicago O'Hare Intl

Sat 8/15

3:43 pm-10:39 pm

1 stop7h 56m

Idaho Falls Fanning Field

Tue 8/18

1:43 pm-11:59 pm

1 stop9h 16m

$355

PeoriaIdaho Falls

PIA - IDA

PIAIDA

Greater Peoria

Sun 8/9

9:15 pm-8:59 am

1 stop12h 44m

Idaho Falls Fanning Field

Fri 8/14

9:49 am-4:00 pm

1 stop29h 11m

$356

St. LouisIdaho Falls

STL - IDA

STLIDA

Lambert-St Louis

Mon 8/17

7:56 pm-3:37 pm

1 stop20h 41m

Idaho Falls Fanning Field

Thu 8/20

3:57 pm-5:10 pm

1 stop24h 13m

$369

ChicagoIdaho Falls

ORD - IDA

ORDIDA

Chicago O'Hare Intl

Wed 7/15

7:20 am-1:06 pm

1 stop6h 46m

Idaho Falls Fanning Field

Sat 7/25

1:43 pm-11:59 pm

1 stop9h 16m

$374

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/5

Showing 1-10 of 60 resultsSorted by cheapest first
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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 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 June 9, 2026.

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.

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, Alaska Airlines, and Delta fly from Illinois to Idaho Falls in about 3h 38m. The time it takes to get you to your destination can typically vary by up to 3h 57m. Airlines will cover a distance of 1225 mi. This flight may include one or multiple stops.

  • 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.

  • What are the most reliable airlines from Illinois to Idaho Falls?

    Before booking your flight to Idaho Falls from Illinois, check out the most reliable airlines to get you to your destination on time: United Airlines (100%), SkyWest Airlines (92%), American Airlines( 83%).

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

    Looking for the cheapest flight from Illinois to Idaho Falls? While on average our users pay $460, our data indicates the cheapest price to be $319. The most popular route (Chicago O'Hare Intl - Idaho Falls Fanning Field), is priced around $281.

  • 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.

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 June 9, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$319Average$431FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$371Average$451FlexibilityNo cancel feeOn-time71%

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