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Idaho Falls

$171+ 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 5/28. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — IDA
May 6 — May 131
Tue 5/6
Tue 5/13
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 May 1, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$339
(United Airlines)

One-way from

$171
(Alaska Airlines)

Popular in

January

Cheapest in

September

Average price

$593

Good round-trip deal

$323 or less
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 May 2025
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Price to beat on a round-trip flight from Illinois to Idaho Falls Fanning Field.
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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 May 1, 2025.

This United Airlines deal was found by Cheapflights users on 4/30. 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.
Tue 8/269:00 amMLI - IDA
1 stop5h 30mUnited Airlines
Wed 9/32:35 pmIDA - MLI
1 stop5h 33mUnited Airlines
Deal found 4/30$339
This Hawaiian Airlines deal was found by Cheapflights users on 4/29. 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 Hawaiian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/212:00 pmORD - IDA
1 stop9h 38mHawaiian Airlines
Sat 10/254:00 pmIDA - ORD
1 stop6h 59mHawaiian Airlines
Deal found 4/29$342
This Delta deal was found by Cheapflights users on 4/30. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/74:30 pmORD - IDA
1 stop7h 25mDelta
Fri 6/136:00 amIDA - ORD
1 stop4h 52mDelta
Deal found 4/30$343
This United Airlines deal was found by Cheapflights users on 4/30. 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.
Mon 8/253:55 pmPIA - IDA
2 stops7h 53mUnited Airlines
Sat 8/302:35 pmIDA - PIA
1 stop5h 22mUnited Airlines
Deal found 4/30$344
This Alaska Airlines deal was found by Cheapflights users on 4/30. 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.
Sat 9/66:20 amORD - IDA
1 stop17h 19mAlaska Airlines
Tue 9/94:03 pmIDA - ORD
1 stop6h 56mAlaska Airlines
Deal found 4/30$369
This American Airlines deal was found by Cheapflights users on 4/30. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/69:45 amORD - IDA
Nonstop3h 15mAmerican Airlines
Tue 9/912:30 pmIDA - ORD
Nonstop3h 25mAmerican Airlines
Deal found 4/30$371
This Delta deal was found by Cheapflights users on 4/30. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/61:00 pmMDW - IDA
2 stops10h 15mDelta
Tue 9/96:10 amIDA - MDW
2 stops11h 26mDelta
Deal found 4/30$377
This United Airlines deal was found by Cheapflights users on 4/30. 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.
Sun 7/135:00 amORD - IDA
1 stop5h 44mUnited Airlines
Tue 7/224:13 pmIDA - ORD
1 stop5h 21mUnited Airlines
Deal found 4/30$423
This Delta deal was found by Cheapflights users on 4/30. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/77:15 amSTL - IDA
1 stop8h 04mDelta
Sun 7/136:52 pmIDA - STL
1 stop4h 46mDelta
Deal found 4/30$481
This United Airlines deal was found by Cheapflights users on 4/30. 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.
Thu 6/54:32 pmSTL - IDA
1 stop7h 19mUnited Airlines
Mon 6/95:55 pmIDA - STL
1 stop17h 51mUnited Airlines
Deal found 4/30$499
This American Airlines deal was found by Cheapflights users on 4/30. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/223:53 pmBMI - IDA
1 stop6h 26mAmerican Airlines
Tue 9/27:00 amIDA - BMI
1 stop7h 21mAmerican Airlines
Deal found 4/30$514
This American Airlines deal was found by Cheapflights users on 4/30. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/45:26 amSTL - IDA
1 stop8h 03mAmerican Airlines
Tue 5/61:02 pmIDA - STL
1 stop5h 27mAmerican Airlines
Deal found 4/30$711

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 May 1, 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

MolineIdaho Falls

MLI - IDA

MLIIDA

Moline Quad-City

Tue 8/26

9:00 am-1:30 pm

1 stop5h 30m

Idaho Falls Fanning Field

Wed 9/3

2:35 pm-9:08 pm

1 stop5h 33m

$339

ChicagoIdaho Falls

ORD - IDA

ORDIDA

Chicago O'Hare Intl

Tue 10/21

2:00 pm-10:38 pm

1 stop9h 38m

Idaho Falls Fanning Field

Sat 10/25

4:00 pm-11:59 pm

1 stop6h 59m

$342

ChicagoIdaho Falls

ORD - IDA

ORDIDA

Chicago O'Hare Intl

Sat 6/7

4:30 pm-10:55 pm

1 stop7h 25m

Idaho Falls Fanning Field

Fri 6/13

6:00 am-11:52 am

1 stop4h 52m

$343

PeoriaIdaho Falls

PIA - IDA

PIAIDA

Greater Peoria

Mon 8/25

3:55 pm-10:48 pm

2 stops7h 53m

Idaho Falls Fanning Field

Sat 8/30

2:35 pm-8:57 pm

1 stop5h 22m

$344

ChicagoIdaho Falls

ORD - IDA

ORDIDA

Chicago O'Hare Intl

Sat 9/6

6:20 am-10:39 pm

1 stop17h 19m

Idaho Falls Fanning Field

Tue 9/9

4:03 pm-11:59 pm

1 stop6h 56m

$369

ChicagoIdaho Falls

ORD - IDA

ORDIDA

Chicago O'Hare Intl

Sat 9/6

9:45 am-12:00 pm

Nonstop3h 15m

Idaho Falls Fanning Field

Tue 9/9

12:30 pm-4:55 pm

Nonstop3h 25m

$371

ChicagoIdaho Falls

MDW - IDA

MDWIDA

Chicago Midway

Sat 9/6

1:00 pm-10:15 pm

2 stops10h 15m

Idaho Falls Fanning Field

Tue 9/9

6:10 am-6:36 pm

2 stops11h 26m

$377

ChicagoIdaho Falls

ORD - IDA

ORDIDA

Chicago O'Hare Intl

Sun 7/13

5:00 am-9:44 am

1 stop5h 44m

Idaho Falls Fanning Field

Wed 7/23

4:13 pm-12:30 am

1 stop7h 17m

$423

St. LouisIdaho Falls

STL - IDA

STLIDA

Lambert-St Louis

Mon 7/7

7:15 am-2:19 pm

1 stop8h 04m

Idaho Falls Fanning Field

Sun 7/13

6:52 pm-12:38 am

1 stop4h 46m

$481

St. LouisIdaho Falls

STL - IDA

STLIDA

Lambert-St Louis

Thu 6/5

4:32 pm-10:51 pm

1 stop7h 19m

Idaho Falls Fanning Field

Mon 6/9

5:55 pm-12:46 pm

1 stop17h 51m

$499

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/29

Showing 1-10 of 20 results
1
2

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 May 1, 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 May 1, 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
9,972 reviews

Food

7.1

Boarding

8.1

Crew

8.5

Comfort

7.9

Overall

8.0

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Alaska Airlines
8.0
Very good
9,972 reviews
Alaska Airlines
8.0
Very good
9,972 reviews

Food

7.1

Boarding

8.1

Crew

8.5

Comfort

7.9

Overall

8.0

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Delta
8.0
Very good
7,934 reviews
Alaska Airlines
8.0
Very good
9,972 reviews

Food

7.1

Boarding

8.1

Crew

8.5

Comfort

7.9

Overall

8.0

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Hawaiian Airlines
7.9
Good
2,409 reviews
Alaska Airlines
8.0
Very good
9,972 reviews

Food

7.1

Boarding

8.1

Crew

8.5

Comfort

7.9

Overall

8.0

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
United Airlines
7.4
Good
8,696 reviews
Alaska Airlines
8.0
Very good
9,972 reviews

Food

7.1

Boarding

8.1

Crew

8.5

Comfort

7.9

Overall

8.0

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
American Airlines
7.2
Good
10,000 reviews
Alaska Airlines
8.0
Very good
9,972 reviews

Food

7.1

Boarding

8.1

Crew

8.5

Comfort

7.9

Overall

8.0

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

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 Alaska Airlines. According to our data, you can fly for as low as $171. Users have also found prices from $172 and $212 on Delta 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, Chicago Midway - Idaho Falls Fanning Field or Moline Quad-City - Idaho Falls Fanning Field as they are the most popular.

  • 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 $323, our data indicates the cheapest price to be $323. The most popular route (Chicago O'Hare Intl - Idaho Falls Fanning Field), is priced around $342.

  • 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

See prices for flight routes from nearby airports that may be better suited for you.
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Top 3 airlines flying from Illinois to Idaho Falls

Discover the top 3 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 May 1, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$237Average$464FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$314Average$323FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$363Average$620FlexibilityNo cancel feeOn-time69%

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