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Illinois

$72+ Cheap flights from Indiana 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 10/24. Fares are subject to change and may not be available on all flights or dates of travel.
IND — ORD
Aug 30 — Sep 61
Sat 8/30
Sat 9/6
1 adult, Economy
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Cheap flight deals from Indiana to Illinois

Keep the following information in mind while searching for Indiana to Illinois flight deals. Data was last updated August 25, 2025.

Round-trip from

$143
(Priceline)

One-way from

$72
(Priceline)

Popular in

March

Cheapest in

August

Average price

$212

Good round-trip deal

$256 or less

Good one-way deal

$119 or less
From Indiana to Illinois
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One-way flight from Indiana to Illinois
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Highest demand for flights based on searches. 8% potential increase in price ($25 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($5 potential savings vs. average RT price).
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Average for round-trip flights in August 2025
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Price to beat on a round-trip flight from Indiana to Illinois.
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Price to beat on a one-way flight from Indiana to Illinois.
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Find flight deals from Indiana to Illinois

Cheapest flights from Indiana to Illinois
Explore the most affordable flight options available from Indiana to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 25, 2025.

This Priceline deal was found by Cheapflights users on 8/24. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/186:20 amMDW - STL
1 stop8h 44mFrontier
Mon 9/224:00 pmSTL - MDW
1 stop7h 20mFrontier
Deal found 8/24$143
This Priceline deal was found by Cheapflights users on 8/24. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/185:10 amORD - STL
1 stop9h 54mFrontier
Mon 9/224:00 pmSTL - ORD
1 stop8h 10mFrontier
Deal found 8/24$143
This Priceline deal was found by Cheapflights users on 8/24. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/259:29 amIND - ORD
1 stop8h 28mFrontier
Fri 9/55:10 amORD - IND
1 stop5h 01mFrontier
Deal found 8/24$144
This Priceline deal was found by Cheapflights users on 8/24. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/65:11 amORD - STL
1 stop5h 01mFrontier
Sun 11/97:02 pmSTL - ORD
1 stop5h 57mFrontier
Deal found 8/24$144
This Frontier deal was found by Cheapflights users on 8/24. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/225:24 pmIND - ORD
1 stop7h 29mFrontier
Sun 10/265:25 amORD - IND
1 stop7h 26mFrontier
Deal found 8/24$148
This Frontier deal was found by Cheapflights users on 8/23. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/84:20 pmIND - ORD
1 stop8h 52mFrontier
Mon 11/105:11 amORD - IND
1 stop5h 11mFrontier
Deal found 8/23$150
This Frontier deal was found by Cheapflights users on 8/23. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/256:20 amMDW - STL
1 stop8h 44mFrontier
Mon 9/294:00 pmSTL - MDW
1 stop7h 20mFrontier
Deal found 8/23$150
This Frontier deal was found by Cheapflights users on 8/23. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/215:10 amORD - STL
1 stop9h 54mFrontier
Thu 9/254:00 pmSTL - ORD
1 stop8h 10mFrontier
Deal found 8/23$150
This FlightHub deal was found by Cheapflights users on 8/24. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/205:01 pmIND - ORD
1 stop17h 36mFrontier
Sat 9/278:00 amORD - IND
1 stop8h 26mFrontier
Deal found 8/24$151
This FlightHub deal was found by Cheapflights users on 8/25. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/193:48 pmMDW - STL
1 stop17h 18mFrontier
Sun 9/211:52 pmSTL - MDW
1 stop17h 31mFrontier
Deal found 8/25$151
This Frontier deal was found by Cheapflights users on 8/23. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/225:10 amORD - STL
1 stop9h 54mFrontier
Mon 9/294:00 pmSTL - ORD
1 stop8h 10mFrontier
Deal found 8/23$151
This Frontier deal was found by Cheapflights users on 8/23. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/1610:06 pmIND - ORD
1 stop10h 28mFrontier
Sun 10/195:25 amORD - IND
1 stop7h 26mFrontier
Deal found 8/23$154

Cheapflights Fare Finder

 
Customize your flight search to find flights from Indiana 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 August 25, 2025.
Use the filters below to find and compare flights from Indiana to Illinois that are best for you.

Fly from

Indiana

Fly to

Illinois

Route

Depart

Return

Price

ChicagoSt. Louis

MDW - STL

MDWSTL

Chicago Midway

Thu 9/18

6:20 am-3:04 pm

1 stop8h 44m

Lambert-St Louis

Mon 9/22

4:00 pm-11:20 pm

1 stop7h 20m

$143

ChicagoSt. Louis

MDW - STL

MDWSTL

Chicago Midway

Thu 9/25

6:20 am-3:04 pm

1 stop8h 44m

Lambert-St Louis

Mon 9/29

4:00 pm-11:20 pm

1 stop7h 20m

$143

ChicagoSt. Louis

MDW - STL

MDWSTL

Chicago Midway

Sun 9/21

6:20 am-3:04 pm

1 stop8h 44m

Lambert-St Louis

Sun 9/28

4:00 pm-11:20 pm

1 stop7h 20m

$143

ChicagoSt. Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

Thu 9/25

5:10 am-3:04 pm

1 stop9h 54m

Lambert-St Louis

Mon 9/29

4:00 pm-12:10 am

1 stop8h 10m

$143

ChicagoSt. Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

Thu 10/2

5:10 am-3:04 pm

1 stop9h 54m

Lambert-St Louis

Mon 10/6

4:00 pm-11:39 pm

1 stop7h 39m

$143

ChicagoSt. Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

Thu 9/18

5:10 am-3:04 pm

1 stop9h 54m

Lambert-St Louis

Mon 9/22

4:00 pm-12:10 am

1 stop8h 10m

$143

IndianapolisChicago

IND - ORD

INDORD

Indianapolis

Sat 11/8

4:20 pm-12:12 am

1 stop8h 52m

Chicago O'Hare Intl

Mon 11/10

5:11 am-11:22 am

1 stop5h 11m

$144

IndianapolisChicago

IND - ORD

INDORD

Indianapolis

Sun 10/26

7:36 pm-7:10 am

1 stop12h 34m

Chicago O'Hare Intl

Thu 11/13

6:00 am-7:44 pm

1 stop12h 44m

$144

LouisvilleChicago

SDF - ORD

SDFORD

Louisville Intl

Tue 11/11

7:39 am-8:19 am

Nonstop1h 40m

Chicago O'Hare Intl

Tue 11/11

8:29 pm-10:59 pm

Nonstop1h 30m

$155

LouisvilleChicago

SDF - ORD

SDFORD

Louisville Intl

Wed 9/24

10:55 am-11:33 am

Nonstop1h 38m

Chicago O'Hare Intl

Tue 9/30

4:00 pm-6:33 pm

Nonstop1h 33m

$155

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/24

Showing 1-10 of 60 results
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Best time to book a flight from Indiana to Illinois

Have a flexible travel schedule? Discover the best time to fly to Illinois from Indiana 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 Indiana to Illinois

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

Currently, August is the cheapest month in which you can book a flight from Indiana to Illinois (average of $245). Flying from Indiana 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 IN to IL?

Find hourly flight availability from Indiana 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 August 25, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Indiana to Illinois as you normally would.

Weekly flight availability from Indiana to Illinois

Explore weekly flight availability from Indiana to Illinois. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated August 25, 2025.

The most flights from USIN to USIL are scheduled on a Friday (72 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (43 on average).

How much does it cost to fly round-trip from Indiana to Illinois?

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 August 25, 2025.
Peruse reviews from past customers who have flown with United Airlines and American Airlines from Indiana to Illinois to help guide your decision. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
8,940 reviews

Overall

7.4

Entertainment

7.1

Food

6.6

Crew

8.1

Boarding

7.7

Comfort

7.3

Reviews

1 / 20
2.0
Mediocre

Deb,Jan 2025

MKE - ORD

It was terrible! So much to say, but in a nutshell we used vouchers from United because our last trip with them was awful with many mishaps and errors made. Unfortunately, this trip was even worse!
United Airlines
7.4
Good
8,940 reviews
United Airlines
7.4
Good
8,940 reviews

Overall

7.4

Entertainment

7.1

Food

6.6

Crew

8.1

Boarding

7.7

Comfort

7.3

Reviews

1 / 20
2.0
Mediocre

Deb,Jan 2025

MKE - ORD

It was terrible! So much to say, but in a nutshell we used vouchers from United because our last trip with them was awful with many mishaps and errors made. Unfortunately, this trip was even worse!
American Airlines
7.2
Good
10,000 reviews
United Airlines
7.4
Good
8,940 reviews

Overall

7.4

Entertainment

7.1

Food

6.6

Crew

8.1

Boarding

7.7

Comfort

7.3

Reviews

1 / 20
2.0
Mediocre

Deb,Jan 2025

MKE - ORD

It was terrible! So much to say, but in a nutshell we used vouchers from United because our last trip with them was awful with many mishaps and errors made. Unfortunately, this trip was even worse!

Related info for your journey

Find useful and relevant information for your journey from Indiana to Illinois. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Indiana to Illinois?

    For as low as $155, Frontier can have you in Illinois from Indiana in 1h 20m. The distance from Indiana to Illinois is about 271 mi. Both multi-stop and nonstop flights can be found to your destination and back.

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

    $72 is the cheapest one-way deal found within the past few days, from Frontier. You may also be able to find cheap deals on American Airlines and United Airlines, with prices starting from $78 and $78, respectively.

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

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

  • How can I find direct flights from Indiana to Illinois?

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

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

    Yes. Cheapflights offers flight deals from Indiana 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 Indiana to Illinois?

    Currently, August is the cheapest month in which you can book a flight from Indiana to Illinois (average of $245). Flying from Indiana 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 Indiana to Illinois

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

Discover the top 3 airlines that operate flights from Indiana 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 August 25, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$156Average$312FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$179Average$302FlexibilityNo cancel feeOn-time69%
Southern / MokuleleCheapest$189Average$302FlexibilityNo cancel feeOn-timeN/A

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