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Idaho Falls

$103+ 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 11/27. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — IDA
nov. 29 — dic. 61
sáb. 11/29
sáb. 12/6
1 adult, Economy
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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 octubre 30, 2025.

This Kiwi.com deal was found by Cheapflights users on 10/29. 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.
jue. 11/139:22 pmORD - IDA
2 stops19h 46mMultiple Airlines
lun. 11/177:56 pmIDA - ORD
1 stop8h 36mMultiple Airlines
Deal found 10/29$281
This United Airlines deal was found by Cheapflights users on 10/29. 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.
mié. 12/171:51 pmORD - IDA
1 stop21h 07mUnited Airlines
vie. 12/264:05 pmIDA - ORD
1 stop6h 54mUnited Airlines
Deal found 10/29$448
This Alaska Airlines deal was found by Cheapflights users on 10/29. 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.
mié. 11/128:00 amORD - IDA
1 stop8h 13mAlaska Airlines
mié. 11/193:50 pmIDA - ORD
1 stop7h 34mAlaska Airlines
Deal found 10/29$457
This United Airlines deal was found by Cheapflights users on 10/29. 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.
mar. 12/233:42 pmORD - IDA
1 stop8h 17mUnited Airlines
lun. 12/295:00 amIDA - ORD
1 stop5h 25mUnited Airlines
Deal found 10/29$461
This United Airlines deal was found by Cheapflights users on 10/28. 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.
mié. 11/128:43 amPIA - IDA
1 stop5h 52mUnited Airlines
dom. 11/162:45 pmIDA - PIA
1 stop5h 11mUnited Airlines
Deal found 10/28$469
This Delta deal was found by Cheapflights users on 10/28. 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. 11/111:38 pmORD - IDA
1 stop5h 39mDelta
sáb. 11/151:15 pmIDA - ORD
1 stop7h 10mDelta
Deal found 10/28$471
This Delta deal was found by Cheapflights users on 10/28. 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. 11/1110:47 amMDW - IDA
2 stops12h 32mDelta
sáb. 11/151:15 pmIDA - MDW
2 stops9h 25mDelta
Deal found 10/28$481
This Alaska Airlines deal was found by Cheapflights users on 10/30. 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. 12/306:00 amORD - IDA
1 stop19h 07mAlaska Airlines
vie. 1/26:00 amIDA - ORD
1 stop10h 12mAlaska Airlines
Deal found 10/30$511
This United Airlines deal was found by Cheapflights users on 10/30. 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.
mar. 12/308:45 amORD - IDA
1 stop7h 37mUnited Airlines
sáb. 1/35:00 amIDA - ORD
1 stop5h 25mUnited Airlines
Deal found 10/30$521
This Kiwi.com deal was found by Cheapflights users on 10/28. 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.
sáb. 12/209:15 amMDW - IDA
2 stops33h 27mMultiple Airlines
sáb. 1/39:30 pmIDA - MDW
1 stop24h 51mMultiple Airlines
Deal found 10/28$545
This United Airlines deal was found by Cheapflights users on 10/29. 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.
jue. 11/138:52 amMLI - IDA
1 stop5h 43mUnited Airlines
lun. 11/175:00 amIDA - MLI
2 stops15h 17mUnited Airlines
Deal found 10/29$548
This Kiwi.com deal was found by Cheapflights users on 10/28. 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.
dom. 12/213:01 pmMDW - IDA
1 stop18h 00mMultiple Airlines
dom. 1/46:21 pmIDA - MDW
2 stops26h 51mMultiple Airlines
Deal found 10/28$582

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 octubre 30, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$281
(Kiwi.com)

One-way from

$103
(Kiwi.com)

Popular in

January

Cheapest in

March

Average price

$359
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. 30% potential increase in price ($205 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
Average for round-trip flights in October 2025
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 octubre 30, 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

jue. 11/13

2:31 pm-4:08 pm

3 stops26h 37m

Idaho Falls Fanning Field

lun. 11/17

7:56 pm-5:32 am

1 stop8h 36m

$322

St. LouisIdaho Falls

STL - IDA

STLIDA

Lambert-St Louis

mar. 3/3

2:55 pm-10:38 pm

1 stop8h 43m

Idaho Falls Fanning Field

mié. 3/4

4:00 pm-11:56 pm

1 stop6h 56m

$371

St. LouisIdaho Falls

STL - IDA

STLIDA

Lambert-St Louis

mar. 3/3

7:00 am-12:31 pm

1 stop6h 31m

Idaho Falls Fanning Field

mié. 3/4

6:45 pm-9:04 am

2 stops13h 19m

$416

St. LouisIdaho Falls

STL - IDA

STLIDA

Lambert-St Louis

jue. 2/5

8:45 am-1:30 pm

1 stop5h 45m

Idaho Falls Fanning Field

mar. 2/10

10:51 am-10:58 pm

2 stops11h 07m

$426

ChicagoIdaho Falls

ORD - IDA

ORDIDA

Chicago O'Hare Intl

mié. 12/17

1:51 pm-9:58 am

1 stop21h 07m

Idaho Falls Fanning Field

vie. 12/26

4:05 pm-11:59 pm

1 stop6h 54m

$448

ChicagoIdaho Falls

ORD - IDA

ORDIDA

Chicago O'Hare Intl

mié. 11/12

8:00 am-3:13 pm

1 stop8h 13m

Idaho Falls Fanning Field

mié. 11/19

3:50 pm-12:24 am

1 stop7h 34m

$457

ChicagoIdaho Falls

ORD - IDA

ORDIDA

Chicago O'Hare Intl

mar. 12/23

3:42 pm-10:59 pm

1 stop8h 17m

Idaho Falls Fanning Field

lun. 12/29

5:00 am-11:25 am

1 stop5h 25m

$461

St. LouisIdaho Falls

STL - IDA

STLIDA

Lambert-St Louis

mié. 1/14

2:45 pm-9:14 pm

1 stop7h 29m

Idaho Falls Fanning Field

lun. 1/19

2:40 pm-8:58 pm

1 stop5h 18m

$461

PeoriaIdaho Falls

PIA - IDA

PIAIDA

Greater Peoria

mié. 11/12

8:43 am-1:35 pm

1 stop5h 52m

Idaho Falls Fanning Field

dom. 11/16

2:45 pm-8:56 pm

1 stop5h 11m

$469

ChicagoIdaho Falls

ORD - IDA

ORDIDA

Chicago O'Hare Intl

mar. 11/11

1:38 pm-6:17 pm

1 stop5h 39m

Idaho Falls Fanning Field

sáb. 11/15

1:15 pm-9:25 pm

1 stop7h 10m

$471

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/28

Showing 1-10 of 48 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 $229). Flying from Illinois to Idaho Falls in February is currently the most expensive (average of $384). 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 octubre 30, 2025.

When flying from Illinois to Idaho Falls, the time of day you fly usually plays a role in the price. Save by searching for a flight in the evening, which can drop the price by up to 35% versus a flight in the morning.

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 Hawaiian Airlines, Delta, and United Airlines fly from Illinois to Idaho Falls in about 6h 31m. The time it takes to get you to your destination can typically vary by up to 14h 36m. Airlines will cover a distance of 1171 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 Lambert-St Louis - Idaho Falls Fanning Field, Chicago O'Hare Intl - 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 $229). Flying from Illinois to Idaho Falls in February is currently the most expensive (average of $384). 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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Alternative routes for Illinois to Idaho Falls

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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 octubre 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$323Average$506FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$406Average$620FlexibilityNo cancel feeOn-time69%

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