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Idaho Falls

$172+ 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 7/28. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — IDA
Apr 6 — Apr 131
Sun 4/6
Sun 4/13
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 April 1, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$331
(Trip.com)

One-way from

$230
(Hawaiian Airlines)

Popular in

March

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 ($142 potential increase over avg. RT price).
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Cheapest flight prices on average. 12% potential price decrease ($64 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 1, 2025.

This Trip.com deal was found by Cheapflights users on 3/31. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/136:00 amORD - IDA
1 stop17h 36mAlaska Airlines
Tue 5/204:20 pmIDA - ORD
1 stop6h 39mAlaska Airlines
Deal found 3/31$331
This Delta deal was found by Cheapflights users on 3/30. 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.
Tue 5/131:45 pmORD - IDA
2 stops10h 06mDelta
Tue 5/2012:30 pmIDA - ORD
1 stop8h 10mDelta
Deal found 3/30$348
This Delta deal was found by Cheapflights users on 3/31. 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 4/281:46 pmSTL - IDA
2 stops10h 10mDelta
Mon 5/56:55 pmIDA - STL
1 stop4h 47mDelta
Deal found 3/31$352
This American Airlines deal was found by Cheapflights users on 3/30. 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 5/21:17 pmORD - IDA
1 stop9h 53mAmerican Airlines
Sun 5/412:59 pmIDA - ORD
1 stop7h 16mAmerican Airlines
Deal found 3/30$381
This American Airlines deal was found by Cheapflights users on 3/31. 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 5/25:26 amSTL - IDA
1 stop8h 03mAmerican Airlines
Fri 5/91:02 pmIDA - STL
1 stop5h 27mAmerican Airlines
Deal found 3/31$383
This United Airlines deal was found by Cheapflights users on 3/31. 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 8/266:30 amMLI - IDA
2 stops11h 52mUnited Airlines
Wed 9/35:00 amIDA - MLI
2 stops10h 54mUnited Airlines
Deal found 3/31$395
This Alaska Airlines deal was found by Cheapflights users on 3/31. 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.
Mon 4/286:30 amSTL - IDA
1 stop10h 28mAlaska Airlines
Mon 5/54:35 pmIDA - STL
1 stop20h 33mAlaska Airlines
Deal found 3/31$422
This United Airlines deal was found by Cheapflights users on 3/31. 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 6/305:00 amORD - IDA
1 stop5h 44mUnited Airlines
Fri 7/410:45 amIDA - ORD
1 stop5h 20mUnited Airlines
Deal found 3/31$423
This Delta deal was found by Cheapflights users on 3/30. 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.
Tue 5/131:55 pmMDW - IDA
2 stops9h 56mDelta
Tue 5/206:00 amIDA - MDW
2 stops10h 45mDelta
Deal found 3/30$440
This Hawaiian Airlines deal was found by Cheapflights users on 3/31. 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 4/156:44 amSTL - IDA
1 stop9h 50mHawaiian Airlines
Sat 4/194:11 pmIDA - STL
1 stop6h 48mHawaiian Airlines
Deal found 3/31$460
This United Airlines deal was found by Cheapflights users on 3/31. 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 4/159:39 amSTL - IDA
2 stops12h 28mUnited Airlines
Sat 4/192:20 pmIDA - STL
1 stop6h 30mUnited Airlines
Deal found 3/31$466
This United Airlines deal was found by Cheapflights users on 3/31. 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 8/256:55 amPIA - IDA
2 stops11h 27mUnited Airlines
Wed 9/32:35 pmIDA - PIA
1 stop5h 12mUnited Airlines
Deal found 3/31$466

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 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

ChicagoIdaho Falls

ORD - IDA

ORDIDA

Chicago O'Hare Intl

Tue 5/13

6:00 am-10:36 pm

1 stop17h 36m

Idaho Falls Fanning Field

Tue 5/20

4:20 pm-11:59 pm

1 stop6h 39m

$331

ChicagoIdaho Falls

ORD - IDA

ORDIDA

Chicago O'Hare Intl

Tue 5/13

1:45 pm-10:51 pm

2 stops10h 06m

Idaho Falls Fanning Field

Tue 5/20

12:30 pm-9:40 pm

1 stop8h 10m

$348

St. LouisIdaho Falls

STL - IDA

STLIDA

Lambert-St Louis

Mon 4/28

1:46 pm-10:56 pm

2 stops10h 10m

Idaho Falls Fanning Field

Mon 5/5

6:55 pm-12:42 am

1 stop4h 47m

$352

ChicagoIdaho Falls

ORD - IDA

ORDIDA

Chicago O'Hare Intl

Fri 5/2

1:17 pm-10:10 pm

1 stop9h 53m

Idaho Falls Fanning Field

Sun 5/4

12:59 pm-9:15 pm

1 stop7h 16m

$381

St. LouisIdaho Falls

STL - IDA

STLIDA

Lambert-St Louis

Fri 5/2

5:26 am-12:29 pm

1 stop8h 03m

Idaho Falls Fanning Field

Fri 5/9

1:02 pm-7:29 pm

1 stop5h 27m

$383

MolineIdaho Falls

MLI - IDA

MLIIDA

Moline Quad-City

Tue 8/26

6:30 am-5:22 pm

2 stops11h 52m

Idaho Falls Fanning Field

Wed 9/3

5:00 am-4:54 pm

2 stops10h 54m

$395

St. LouisIdaho Falls

STL - IDA

STLIDA

Lambert-St Louis

Mon 4/28

6:30 am-3:58 pm

1 stop10h 28m

Idaho Falls Fanning Field

Mon 5/5

4:35 pm-2:08 pm

1 stop20h 33m

$422

ChicagoIdaho Falls

ORD - IDA

ORDIDA

Chicago O'Hare Intl

Mon 6/30

5:00 am-9:44 am

1 stop5h 44m

Idaho Falls Fanning Field

Fri 7/4

10:45 am-5:05 pm

1 stop5h 20m

$423

ChicagoIdaho Falls

MDW - IDA

MDWIDA

Chicago Midway

Tue 5/13

1:55 pm-10:51 pm

2 stops9h 56m

Idaho Falls Fanning Field

Tue 5/20

6:00 am-5:45 pm

2 stops10h 45m

$440

St. LouisIdaho Falls

STL - IDA

STLIDA

Lambert-St Louis

Tue 4/15

6:44 am-3:34 pm

1 stop9h 50m

Idaho Falls Fanning Field

Sat 4/19

4:11 pm-11:59 pm

1 stop6h 48m

$460

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/30

Showing 1-10 of 24 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 $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 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 April 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
9,818 reviews

Comfort

7.9

Overall

8.0

Crew

8.5

Food

7.1

Boarding

8.2

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
Alaska Airlines
8.0
Very good
9,818 reviews
Alaska Airlines
8.0
Very good
9,818 reviews

Comfort

7.9

Overall

8.0

Crew

8.5

Food

7.1

Boarding

8.2

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
Delta
8.0
Very good
7,899 reviews
Alaska Airlines
8.0
Very good
9,818 reviews

Comfort

7.9

Overall

8.0

Crew

8.5

Food

7.1

Boarding

8.2

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
Hawaiian Airlines
7.9
Good
2,342 reviews
Alaska Airlines
8.0
Very good
9,818 reviews

Comfort

7.9

Overall

8.0

Crew

8.5

Food

7.1

Boarding

8.2

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
United Airlines
7.4
Good
8,614 reviews
Alaska Airlines
8.0
Very good
9,818 reviews

Comfort

7.9

Overall

8.0

Crew

8.5

Food

7.1

Boarding

8.2

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
American Airlines
7.2
Good
10,000 reviews
Alaska Airlines
8.0
Very good
9,818 reviews

Comfort

7.9

Overall

8.0

Crew

8.5

Food

7.1

Boarding

8.2

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

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 Hawaiian Airlines. According to our data, you can fly for as low as $230. Users have also found prices from $233 and $246 on United Airlines and Delta, 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

See prices for flight routes from nearby airports that may be better suited for you.
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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 1, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$363Average$618FlexibilityNo cancel feeOn-time69%
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