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Idaho Falls

$139+ 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 5/21. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — IDA
Apr 27 — May 41
Sun 4/27
Sun 5/4
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 April 22, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$333
(American Airlines)

One-way from

$139
(Trip.com)

Popular in

January

Cheapest in

September

Average price

$393
Provider with most accurate pricing for Chicago (CHI)-Idaho Falls Fanning Field flight deals.
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Provider most trusted by Cheapflights users for Chicago (CHI)-Idaho Falls Fanning Field flights.
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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. 19% potential increase in price ($126 potential increase over avg. RT price).
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Cheapest flight prices on average. 6% potential price decrease ($30 potential savings vs. average RT price).
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Average for round-trip flights in April 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 April 22, 2025.

This American Airlines deal was found by Cheapflights users on 4/21. 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.
Fri 8/153:07 pmORD - IDA
1 stop6h 54mAmerican Airlines
Tue 8/1912:30 pmIDA - ORD
Nonstop3h 25mAmerican Airlines
Deal found 4/21$333
This United Airlines deal was found by Cheapflights users on 4/22. 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 8/269:00 amMLI - IDA
1 stop7h 11mUnited Airlines
Wed 9/32:35 pmIDA - MLI
1 stop5h 33mUnited Airlines
Deal found 4/22$339
This United Airlines deal was found by Cheapflights users on 4/22. 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 8/268:45 amPIA - IDA
1 stop7h 26mUnited Airlines
Wed 9/32:35 pmIDA - PIA
1 stop5h 22mUnited Airlines
Deal found 4/22$339
This Delta deal was found by Cheapflights users on 4/21. 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.
Thu 5/291:40 pmORD - IDA
1 stop5h 30mDelta
Sun 6/112:30 pmIDA - ORD
1 stop8h 10mDelta
Deal found 4/21$343
This United Airlines deal was found by Cheapflights users on 4/21. 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 6/105:20 amSTL - IDA
1 stop5h 24mUnited Airlines
Fri 7/410:45 amIDA - STL
1 stop4h 46mUnited Airlines
Deal found 4/21$356
This Alaska Airlines deal was found by Cheapflights users on 4/21. 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.
Tue 8/268:42 pmORD - IDA
1 stop26h 57mAlaska Airlines
Wed 9/34:03 pmIDA - ORD
1 stop6h 56mAlaska Airlines
Deal found 4/21$369
This Delta deal was found by Cheapflights users on 4/21. 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.
Wed 7/97:30 amSTL - IDA
1 stop7h 53mDelta
Tue 7/157:00 pmIDA - STL
2 stops12h 06mDelta
Deal found 4/21$390
This Delta deal was found by Cheapflights users on 4/22. 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.
Wed 6/49:20 amMDW - IDA
2 stops9h 50mDelta
Wed 6/116:52 pmIDA - MDW
2 stops12h 49mDelta
Deal found 4/22$411
This United Airlines deal was found by Cheapflights users on 4/22. 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 7/125:00 amORD - IDA
1 stop5h 44mUnited Airlines
Sat 7/196:03 pmIDA - ORD
1 stop5h 27mUnited Airlines
Deal found 4/22$423
This Hawaiian Airlines deal was found by Cheapflights users on 4/21. 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.
Mon 5/53:44 pmORD - IDA
1 stop7h 52mHawaiian Airlines
Wed 5/76:00 amIDA - ORD
1 stop10h 00mHawaiian Airlines
Deal found 4/21$460
This American Airlines deal was found by Cheapflights users on 4/22. 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.
Sat 5/107:00 amSTL - IDA
1 stop6h 29mAmerican Airlines
Fri 5/161:02 pmIDA - STL
1 stop5h 27mAmerican Airlines
Deal found 4/22$473
This Alaska Airlines deal was found by Cheapflights users on 4/20. 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 5/236:22 pmSTL - IDA
1 stop22h 18mAlaska Airlines
Mon 5/266:00 amIDA - STL
1 stop7h 07mAlaska Airlines
Deal found 4/20$547

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 April 22, 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

Fri 8/15

3:07 pm-9:01 pm

1 stop6h 54m

Idaho Falls Fanning Field

Tue 8/19

12:30 pm-4:55 pm

Nonstop3h 25m

$333

MolineIdaho Falls

MLI - IDA

MLIIDA

Moline Quad-City

Tue 8/26

9:00 am-3:11 pm

1 stop7h 11m

Idaho Falls Fanning Field

Wed 9/3

2:35 pm-9:08 pm

1 stop5h 33m

$339

PeoriaIdaho Falls

PIA - IDA

PIAIDA

Greater Peoria

Tue 8/26

8:45 am-3:11 pm

1 stop7h 26m

Idaho Falls Fanning Field

Wed 9/3

2:35 pm-8:57 pm

1 stop5h 22m

$339

ChicagoIdaho Falls

ORD - IDA

ORDIDA

Chicago O'Hare Intl

Thu 5/29

1:40 pm-6:10 pm

1 stop5h 30m

Idaho Falls Fanning Field

Sun 6/1

12:30 pm-9:40 pm

1 stop8h 10m

$343

St. LouisIdaho Falls

STL - IDA

STLIDA

Lambert-St Louis

Tue 6/10

5:20 am-9:44 am

1 stop5h 24m

Idaho Falls Fanning Field

Fri 7/4

10:45 am-4:31 pm

1 stop4h 46m

$356

ChicagoIdaho Falls

ORD - IDA

ORDIDA

Chicago O'Hare Intl

Tue 8/26

8:42 pm-10:39 pm

1 stop26h 57m

Idaho Falls Fanning Field

Wed 9/3

4:03 pm-11:59 pm

1 stop6h 56m

$369

St. LouisIdaho Falls

STL - IDA

STLIDA

Lambert-St Louis

Wed 7/9

7:30 am-2:23 pm

1 stop7h 53m

Idaho Falls Fanning Field

Wed 7/16

7:00 pm-9:29 am

2 stops13h 29m

$390

ChicagoIdaho Falls

MDW - IDA

MDWIDA

Chicago Midway

Wed 6/4

9:20 am-6:10 pm

2 stops9h 50m

Idaho Falls Fanning Field

Wed 6/11

6:52 pm-8:41 am

2 stops12h 49m

$411

ChicagoIdaho Falls

ORD - IDA

ORDIDA

Chicago O'Hare Intl

Sat 7/12

5:00 am-9:44 am

1 stop5h 44m

Idaho Falls Fanning Field

Sat 7/19

6:03 pm-12:30 am

1 stop5h 27m

$423

ChicagoIdaho Falls

ORD - IDA

ORDIDA

Chicago O'Hare Intl

Mon 5/5

3:44 pm-10:36 pm

1 stop7h 52m

Idaho Falls Fanning Field

Wed 5/7

6:00 am-5:00 pm

1 stop10h 00m

$460

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/22

Showing 1-10 of 27 results
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2
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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 July is currently the most expensive (average of $628). 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 April 22, 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.

Rainfall in Idaho Falls by month

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

In terms of precipitation, rainfall in Idaho Falls ranges from 0.6 - 2.0 inches per month. May is typically the wettest month, when rainfall can reach 2.0 in. July is typically the driest time to visit Idaho Falls when rainfall is around 0.6 in.

Temperature in Idaho Falls by month

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

If weather is an important factor for your trip to Idaho Falls, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 69.8 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 23.0 F).

Reviews of airlines servicing Idaho Falls

Get insights into the airlines that provide service to Idaho Falls. 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 Idaho Falls. Reviews last updated April 22, 2025.
Read reviews from past customers who have flown Alaska Airlines, Delta and Hawaiian Airlines from Illinois to Idaho Falls. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
9,906 reviews

Entertainment

7.1

Food

7.1

Boarding

8.2

Overall

8.0

Crew

8.5

Comfort

7.9

Reviews

1 / 20
4.0
Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >
Alaska Airlines
8.0
Very good
9,906 reviews
Alaska Airlines
8.0
Very good
9,906 reviews

Entertainment

7.1

Food

7.1

Boarding

8.2

Overall

8.0

Crew

8.5

Comfort

7.9

Reviews

1 / 20
4.0
Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >
Delta
8.0
Very good
7,920 reviews
Alaska Airlines
8.0
Very good
9,906 reviews

Entertainment

7.1

Food

7.1

Boarding

8.2

Overall

8.0

Crew

8.5

Comfort

7.9

Reviews

1 / 20
4.0
Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >
Hawaiian Airlines
7.9
Good
2,392 reviews
Alaska Airlines
8.0
Very good
9,906 reviews

Entertainment

7.1

Food

7.1

Boarding

8.2

Overall

8.0

Crew

8.5

Comfort

7.9

Reviews

1 / 20
4.0
Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >
United Airlines
7.4
Good
8,683 reviews
Alaska Airlines
8.0
Very good
9,906 reviews

Entertainment

7.1

Food

7.1

Boarding

8.2

Overall

8.0

Crew

8.5

Comfort

7.9

Reviews

1 / 20
4.0
Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >
American Airlines
7.2
Good
10,000 reviews
Alaska Airlines
8.0
Very good
9,906 reviews

Entertainment

7.1

Food

7.1

Boarding

8.2

Overall

8.0

Crew

8.5

Comfort

7.9

Reviews

1 / 20
4.0
Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >

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.

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

    For one-way options, check prices for Delta. According to our data, you can fly for as low as $164. Users have also found prices from $171 and $200 on Alaska Airlines and American 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, Chicago Midway - Idaho Falls Fanning Field or Lambert-St Louis - 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 July is currently the most expensive (average of $628). 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 Illinois?

Book flights to Illinois 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 airline flying from Illinois to Idaho Falls

Discover the top airline 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 April 22, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$363Average$620FlexibilityNo cancel feeOn-time69%

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