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$242+ Cheap flights from Idaho Falls (IDA) to Illinois

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 1/6. Fares are subject to change and may not be available on all flights or dates of travel.
IDA — ORD
Nov 25 — Dec 21
Mon 11/25
Mon 12/2
1 adult, Economy
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Cheap flight deals from Idaho Falls to Illinois

Discover tips and strategies to find the most affordable flight options for your journey from Idaho Falls (IDA) to Illinois (USIL). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated November 20, 2024.

Find flight deals from Idaho Falls to Illinois

Cheapest flights from Idaho Falls to Illinois
Explore the most affordable flight options available from Idaho Falls to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on November 20, 2024.

This Delta deal was found by Cheapflights users on 11/20. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/116:55 pmIDA - ORD
2 stops12h 24mDelta
Fri 12/131:45 pmORD - IDA
2 stops10h 10mDelta
Deal found 11/20$334
This United deal was found by Cheapflights users on 11/20. 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 United is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/116:05 pmIDA - ORD
1 stop5h 17mUnited Airlines
Fri 12/139:36 pmORD - IDA
1 stop16h 53mUnited Airlines
Deal found 11/20$416
This Delta deal was found by Cheapflights users on 11/20. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/56:10 amIDA - STL
1 stop6h 20mDelta
Mon 12/96:30 pmSTL - IDA
1 stop5h 25mDelta
Deal found 11/20$574
This American Airlines deal was found by Cheapflights users on 11/19. 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 11/305:30 amIDA - STL
1 stop7h 20mAmerican Airlines
Thu 12/122:29 pmSTL - IDA
1 stop8h 54mAmerican Airlines
Deal found 11/19$584
This United Airlines deal was found by Cheapflights users on 11/19. 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 11/307:00 amIDA - STL
1 stop4h 43mUnited Airlines
Thu 12/125:40 pmSTL - IDA
2 stops17h 13mUnited Airlines
Deal found 11/19$635
This American Airlines deal was found by Cheapflights users on 11/19. 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 12/48:15 amIDA - ORD
1 stop8h 27mAmerican Airlines
Fri 12/61:16 pmORD - IDA
1 stop10h 07mAmerican Airlines
Deal found 11/19$684
This Mytrip deal was found by Cheapflights users on 11/19. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/227:53 pmIDA - STL
3 stops19h 33mMultiple Airlines
Sun 11/245:21 pmSTL - IDA
2 stops18h 32mMultiple Airlines
Deal found 11/19$717
This Alaska Airlines deal was found by Cheapflights users on 11/20. 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.
Mon 12/236:00 amIDA - ORD
2 stops22h 30mAlaska Airlines
Wed 1/17:00 amORD - IDA
2 stops17h 59mAlaska Airlines
Deal found 11/20$858
This United Airlines deal was found by Cheapflights users on 11/19. 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 12/46:05 pmIDA - MLI
2 stops26h 10mUnited Airlines
Sun 12/88:57 amMLI - IDA
1 stop9h 27mUnited Airlines
Deal found 11/19$872
This Delta deal was found by Cheapflights users on 11/20. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/116:00 amIDA - MDW
2 stops11h 32mDelta
Fri 12/132:15 pmMDW - IDA
2 stops9h 40mDelta
Deal found 11/20$908

Find flights from Idaho Falls to Illinois within your budget

Customize your flight search to find flights from Idaho Falls to Illinois 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 2,629,791 searches. Data last updated November 20, 2024.

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Depart

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Idaho FallsChicago

IDA - ORD

IDAORD

Idaho Falls Fanning Field

Wed 12/11

6:55 pm-8:19 am

2 stops12h 24m

Chicago O'Hare Intl

Fri 12/13

1:45 pm-10:55 pm

2 stops10h 10m

$334

Idaho FallsChicago

IDA - ORD

IDAORD

Idaho Falls Fanning Field

Wed 12/11

6:05 pm-12:22 am

1 stop5h 17m

Chicago O'Hare Intl

Fri 12/13

9:36 pm-1:29 pm

1 stop16h 53m

$416

Idaho FallsChicago

IDA - ORD

IDAORD

Idaho Falls Fanning Field

Thu 4/17

8:00 am-11:59 pm

1 stop14h 59m

Chicago O'Hare Intl

Tue 4/22

7:45 am-3:23 pm

1 stop8h 38m

$445

Idaho FallsSt. Louis

IDA - STL

IDASTL

Idaho Falls Fanning Field

Thu 12/5

6:10 am-1:30 pm

1 stop6h 20m

Lambert-St Louis

Mon 12/9

6:30 pm-10:55 pm

1 stop5h 25m

$574

Idaho FallsSt. Louis

IDA - STL

IDASTL

Idaho Falls Fanning Field

Sat 11/30

5:30 am-1:50 pm

1 stop7h 20m

Lambert-St Louis

Thu 12/12

2:29 pm-10:23 pm

1 stop8h 54m

$584

Idaho FallsSt. Louis

IDA - STL

IDASTL

Idaho Falls Fanning Field

Sat 11/30

7:00 am-12:43 pm

1 stop4h 43m

Lambert-St Louis

Thu 12/12

5:40 pm-9:53 am

2 stops17h 13m

$635

Idaho FallsChicago

IDA - ORD

IDAORD

Idaho Falls Fanning Field

Wed 12/4

8:15 am-5:42 pm

1 stop8h 27m

Chicago O'Hare Intl

Fri 12/6

1:16 pm-10:23 pm

1 stop10h 07m

$684

Idaho FallsChicago

IDA - MDW

IDAMDW

Idaho Falls Fanning Field

Thu 4/24

6:10 am-6:04 pm

2 stops10h 54m

Chicago Midway

Tue 4/29

10:10 am-10:14 pm

2 stops13h 04m

$858

Idaho FallsMoline

IDA - MLI

IDAMLI

Idaho Falls Fanning Field

Wed 12/4

6:05 pm-9:15 pm

2 stops26h 10m

Moline Quad-City

Sun 12/8

8:57 am-5:24 pm

1 stop9h 27m

$872

Idaho FallsChicago

IDA - ORD

IDAORD

Idaho Falls Fanning Field

Mon 1/6

4:04 pm-11:59 pm

1 stop6h 55m

$242

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/19

Showing 1-10 of 13 results
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Best time to book a flight from Idaho Falls to Illinois

Have a flexible travel schedule? Discover the best time to fly to Illinois from Idaho Falls 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.

Travel insights for flights from Idaho Falls to Illinois

Get recent, data-driven insights about flights from Idaho Falls to Illinois including ideal travel times, pricing trends, and more.

What is the cheapest month to book a flight from Idaho Falls to Illinois?

Currently, September is the cheapest month in which you can book a flight from Idaho Falls to Illinois (average of $232). Flying from Idaho Falls to Illinois in June is currently the most expensive (average of $308). 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 IDA to IL?

Find hourly flight availability from Idaho Falls to Illinois. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated November 20, 2024.

When flying from Idaho Falls to Illinois, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Rainfall in Illinois by month

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

In terms of precipitation, rainfall in Illinois ranges from 1.7 - 4.9 inches per month. August is typically the wettest month, when rainfall can reach 4.9 in. January is typically the driest time to visit Illinois when rainfall is around 1.7 in.

Temperature in Illinois by month

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

If weather is an important factor for your trip to Illinois, 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 73.4 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 Illinois

Get insights into the airlines that provide service to Illinois. 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 Illinois. Reviews last updated November 20, 2024.
See what other customers who have flown with American Airlines, Delta and United Airlines from Idaho Falls to Illinois have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
9,461 reviews

Crew

8.5

Comfort

7.9

Overall

8.0

Entertainment

7.1

Food

7.2

Boarding

8.2

Reviews

1 / 10

Service was good. We pre-ordered a snack but never made it to us.

Alaska Airlines
8.0
Very good
9,461 reviews
Alaska Airlines
8.0
Very good
9,461 reviews

Crew

8.5

Comfort

7.9

Overall

8.0

Entertainment

7.1

Food

7.2

Boarding

8.2

Reviews

1 / 10

Service was good. We pre-ordered a snack but never made it to us.

Delta
8.0
Very good
8,756 reviews
Alaska Airlines
8.0
Very good
9,461 reviews

Crew

8.5

Comfort

7.9

Overall

8.0

Entertainment

7.1

Food

7.2

Boarding

8.2

Reviews

1 / 10

Service was good. We pre-ordered a snack but never made it to us.

United Airlines
7.4
Good
9,171 reviews
Alaska Airlines
8.0
Very good
9,461 reviews

Crew

8.5

Comfort

7.9

Overall

8.0

Entertainment

7.1

Food

7.2

Boarding

8.2

Reviews

1 / 10

Service was good. We pre-ordered a snack but never made it to us.

American Airlines
7.2
Good
10,000 reviews
Alaska Airlines
8.0
Very good
9,461 reviews

Crew

8.5

Comfort

7.9

Overall

8.0

Entertainment

7.1

Food

7.2

Boarding

8.2

Reviews

1 / 10

Service was good. We pre-ordered a snack but never made it to us.

Related info for your journey

Find useful and relevant information for your journey from Idaho Falls to Illinois. 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 from for flights from Idaho Falls to 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 Illinois from Idaho Falls.

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

    $242 is the cheapest one-way deal found within the past few days, from Alaska Airlines. You may also be able to find cheap deals on United Airlines and Delta, with prices starting from $272 and $394, respectively.

  • What are the most popular routes from Idaho Falls to Illinois?

    The most popular flight routes from Idaho Falls to Illinois are Idaho Falls Fanning Field - Lambert-St Louis, Idaho Falls Fanning Field - Chicago O'Hare Intl and Idaho Falls Fanning Field - Chicago Midway.

  • Can I find deals for flights from Idaho Falls to Illinois that include hotel bookings?

    Yes. In addition to deals on Idaho Falls to Illinois flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Idaho Falls to Illinois?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Idaho Falls to Illinois.

  • Can I find deals for business class flights from Idaho Falls to Illinois?

    Yes. Cheapflights offers flight deals from Idaho Falls to Illinois 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 Idaho Falls to Illinois?

    Currently, September is the cheapest month in which you can book a flight from Idaho Falls to Illinois (average of $232). Flying from Idaho Falls to Illinois in June is currently the most expensive (average of $308). 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

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Top airline flying from Idaho Falls to Illinois

Discover the top airline that operate flights from Idaho Falls to Illinois. 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 2,629,791 searches. Data last updated November 20, 2024.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$420Average$670FlexibilityNo cancel feeOn-time69%
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