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$190+ 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 4/12. Fares are subject to change and may not be available on all flights or dates of travel.
IDA — ORD
feb. 25 — mar. 41
mar. 2/25
mar. 3/4
1 adult, Economy
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Cheap flight deals from Idaho Falls to Illinois

Keep the following information in mind while searching for Idaho Falls to Illinois flight deals. Data was last updated febrero 20, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$315
(Delta)

One-way from

$190
(American Airlines)
Provider with most accurate pricing for Idaho Falls Fanning Field-Chicago (CHI) flight deals.
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Provider most trusted by Cheapflights users for Idaho Falls Fanning Field-Chicago (CHI) flights.
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From Idaho Falls Fanning Field to Illinois
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One-way flight from Idaho Falls Fanning Field to Illinois
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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 febrero 20, 2025.

This Delta deal was found by Cheapflights users on 2/20. 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.
jue. 4/36:00 amIDA - ORD
1 stop5h 38mDelta
mar. 4/81:45 pmORD - IDA
1 stop5h 30mDelta
Deal found 2/20$315
This Alaska Airlines deal was found by Cheapflights users on 2/20. 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.
mié. 4/28:00 amIDA - ORD
1 stop20h 40mAlaska Airlines
mar. 4/87:40 amORD - IDA
1 stop15h 55mAlaska Airlines
Deal found 2/20$348
This United Airlines deal was found by Cheapflights users on 2/20. 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 Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 4/44:15 pmIDA - ORD
1 stop5h 47mUnited Airlines
lun. 4/75:00 amORD - IDA
1 stop5h 32mUnited Airlines
Deal found 2/20$406
This Delta deal was found by Cheapflights users on 2/20. 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.
dom. 3/96:55 pmIDA - MDW
2 stops13h 14mDelta
jue. 3/132:55 pmMDW - IDA
2 stops8h 38mDelta
Deal found 2/20$592
This Hawaiian Airlines deal was found by Cheapflights users on 2/19. 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 Hawaiian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 7/94:00 pmIDA - ORD
1 stop6h 59mHawaiian Airlines
mié. 7/162:00 pmORD - IDA
1 stop9h 38mHawaiian Airlines
Deal found 2/19$598
This Hawaiian Airlines deal was found by Cheapflights users on 2/20. 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 Hawaiian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 3/144:07 pmIDA - STL
1 stop6h 52mHawaiian Airlines
dom. 3/167:00 amSTL - IDA
1 stop9h 30mHawaiian Airlines
Deal found 2/20$604
This United Airlines deal was found by Cheapflights users on 2/20. 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 Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 3/145:48 pmIDA - STL
2 stops20h 43mUnited Airlines
dom. 3/165:33 pmSTL - IDA
2 stops17h 01mUnited Airlines
Deal found 2/20$614
This Alaska Airlines deal was found by Cheapflights users on 2/20. 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.
lun. 3/34:07 pmIDA - STL
1 stop6h 52mAlaska Airlines
mié. 3/57:00 amSTL - IDA
1 stop9h 30mAlaska Airlines
Deal found 2/20$724
This Delta deal was found by Cheapflights users on 2/20. 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.
lun. 3/36:00 amIDA - STL
1 stop6h 18mDelta
mié. 3/510:26 amSTL - IDA
2 stops13h 18mDelta
Deal found 2/20$730

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 2,558,603 searches. Data last updated febrero 20, 2025.

Fly from

Idaho Falls

Fly to

Illinois

Route

Depart

Return

Price

Idaho FallsChicago

IDA - ORD

IDAORD

Idaho Falls Fanning Field

jue. 4/3

6:00 am-12:38 pm

1 stop5h 38m

Chicago O'Hare Intl

mar. 4/8

1:45 pm-6:15 pm

1 stop5h 30m

$315

Idaho FallsChicago

IDA - ORD

IDAORD

Idaho Falls Fanning Field

mié. 4/2

8:00 am-5:40 am

1 stop20h 40m

Chicago O'Hare Intl

mar. 4/8

7:40 am-10:35 pm

1 stop15h 55m

$348

Idaho FallsChicago

IDA - ORD

IDAORD

Idaho Falls Fanning Field

vie. 4/4

4:15 pm-11:02 pm

1 stop5h 47m

Chicago O'Hare Intl

lun. 4/7

5:00 am-9:32 am

1 stop5h 32m

$406

Idaho FallsChicago

IDA - MDW

IDAMDW

Idaho Falls Fanning Field

dom. 3/9

6:55 pm-9:09 am

2 stops13h 14m

Chicago Midway

jue. 3/13

2:55 pm-10:33 pm

2 stops8h 38m

$592

Idaho FallsChicago

IDA - ORD

IDAORD

Idaho Falls Fanning Field

mié. 7/9

4:00 pm-11:59 pm

1 stop6h 59m

Chicago O'Hare Intl

mié. 7/16

2:00 pm-10:38 pm

1 stop9h 38m

$598

Idaho FallsSt. Louis

IDA - STL

IDASTL

Idaho Falls Fanning Field

vie. 3/14

4:07 pm-11:59 pm

1 stop6h 52m

Lambert-St Louis

dom. 3/16

7:00 am-3:30 pm

1 stop9h 30m

$604

Idaho FallsSt. Louis

IDA - STL

IDASTL

Idaho Falls Fanning Field

vie. 3/14

5:48 pm-3:31 pm

2 stops20h 43m

Lambert-St Louis

dom. 3/16

5:33 pm-9:34 am

2 stops17h 01m

$614

Idaho FallsSt. Louis

IDA - STL

IDASTL

Idaho Falls Fanning Field

lun. 3/3

4:07 pm-11:59 pm

1 stop6h 52m

Lambert-St Louis

mié. 3/5

7:00 am-3:30 pm

1 stop9h 30m

$724

Idaho FallsSt. Louis

IDA - STL

IDASTL

Idaho Falls Fanning Field

lun. 3/3

6:00 am-1:18 pm

1 stop6h 18m

Lambert-St Louis

mié. 3/5

10:26 am-10:44 pm

2 stops13h 18m

$730

Idaho FallsChicago

IDA - ORD

IDAORD

Idaho Falls Fanning Field

sáb. 4/12

7:43 am-4:02 pm

1 stop7h 19m

$190

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/19

Showing 1-10 of 17 results
1
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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, August is the cheapest month in which you can book a flight from Idaho Falls to Illinois (average of $245). Flying from Idaho Falls to Illinois in March is currently the most expensive (average of $321). 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 febrero 20, 2025.

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 febrero 20, 2025.
See what other customers who have flown with Alaska Airlines, Delta and Hawaiian 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
9,692 reviews

Food

7.1

Overall

8.0

Comfort

7.9

Crew

8.5

Entertainment

7.1

Boarding

8.2

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
9,692 reviews
Alaska Airlines
8.0
Very good
9,692 reviews

Food

7.1

Overall

8.0

Comfort

7.9

Crew

8.5

Entertainment

7.1

Boarding

8.2

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
8,220 reviews
Alaska Airlines
8.0
Very good
9,692 reviews

Food

7.1

Overall

8.0

Comfort

7.9

Crew

8.5

Entertainment

7.1

Boarding

8.2

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
2,317 reviews
Alaska Airlines
8.0
Very good
9,692 reviews

Food

7.1

Overall

8.0

Comfort

7.9

Crew

8.5

Entertainment

7.1

Boarding

8.2

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
8,766 reviews
Alaska Airlines
8.0
Very good
9,692 reviews

Food

7.1

Overall

8.0

Comfort

7.9

Crew

8.5

Entertainment

7.1

Boarding

8.2

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
9,692 reviews

Food

7.1

Overall

8.0

Comfort

7.9

Crew

8.5

Entertainment

7.1

Boarding

8.2

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 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?

    $190 is the cheapest one-way deal found within the past few days, from American Airlines. You may also be able to find cheap deals on United Airlines and Alaska Airlines, with prices starting from $212 and $299, 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 - Chicago O'Hare Intl, Idaho Falls Fanning Field - Lambert-St Louis 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, August is the cheapest month in which you can book a flight from Idaho Falls to Illinois (average of $245). Flying from Idaho Falls to Illinois in March is currently the most expensive (average of $321). 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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Alternative routes for Idaho Falls to Illinois

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Top 2 airlines flying from Idaho Falls to Illinois

Discover the top 2 airlines 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 2,558,603 searches. Data last updated febrero 20, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$326Average$483FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$402Average$669FlexibilityNo cancel feeOn-time69%
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