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$46+ Cheap flights from Illinois to Indiana

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 9/16. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — IND
Aug 5 — Aug 121
Tue 8/5
Tue 8/12
1 adult, Economy
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Cheap flight deals from Illinois to Indiana

Keep the following information in mind while searching for Illinois to Indiana flight deals. Data was last updated July 31, 2025.

Round-trip from

$91
(Southwest)

One-way from

$46
(Southwest)

Popular in

April

Cheapest in

December

Average price

$305

Good round-trip deal

$257 or less

Good one-way deal

$99 or less
From Illinois to Indiana
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One-way flight from Illinois to Indiana
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Highest demand for flights based on searches. 10% potential increase in price ($31 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 July 2025
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Price to beat on a round-trip flight from Illinois to Indiana.
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Price to beat on a one-way flight from Illinois to Indiana.
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Find flight deals from Illinois to Indiana

Cheapest flights from Illinois to Indiana
Explore the most affordable flight options available from Illinois to Indiana. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 31, 2025.

This Southwest deal was found by Cheapflights users on 7/29. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/267:10 amSTL - MDW
Nonstop1h 10mSouthwest
Wed 8/2711:25 amMDW - STL
Nonstop1h 10mSouthwest
Deal found 7/29$91
This American Airlines deal was found by Cheapflights users on 7/30. 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 9/137:23 amSTL - ORD
Nonstop1h 22mAmerican Airlines
Sat 9/207:10 pmORD - STL
Nonstop1h 22mAmerican Airlines
Deal found 7/30$91
This Southwest deal was found by Cheapflights users on 7/31. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/2312:50 pmMDW - SDF
Nonstop1h 15mSouthwest
Mon 8/256:25 amSDF - MDW
Nonstop1h 15mSouthwest
Deal found 7/31$97
This United Airlines deal was found by Cheapflights users on 7/31. 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.
Thu 8/217:44 pmORD - SDF
Nonstop1h 40mUnited Airlines
Thu 8/287:00 amSDF - ORD
Nonstop1h 38mUnited Airlines
Deal found 7/31$97
This Southwest deal was found by Cheapflights users on 7/30. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/264:50 pmSTL - ORD
1 stop6h 15mSouthwest
Wed 8/2711:25 amORD - STL
1 stop8h 35mSouthwest
Deal found 7/30$111
This American Airlines deal was found by Cheapflights users on 7/30. 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 8/233:17 pmORD - SDF
Nonstop1h 26mAmerican Airlines
Mon 8/256:44 amSDF - ORD
Nonstop1h 46mAmerican Airlines
Deal found 7/30$124
This United Airlines deal was found by Cheapflights users on 7/31. 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.
Thu 9/255:00 amSTL - ORD
Nonstop1h 30mUnited Airlines
Sun 9/281:03 pmORD - STL
Nonstop1h 24mUnited Airlines
Deal found 7/31$147
This Southwest deal was found by Cheapflights users on 7/30. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/281:50 pmORD - SDF
1 stop8h 40mSouthwest
Mon 9/15:30 amSDF - ORD
1 stop8h 15mSouthwest
Deal found 7/30$155
This Jettzy deal was found by Cheapflights users on 7/29. 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 Jettzy is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/121:00 pmSTL - ORD
1 stop3h 19mSouthern / Mokulele
Fri 9/198:15 amORD - STL
1 stop3h 45mSouthern / Mokulele
Deal found 7/29$166
This Frontier deal was found by Cheapflights users on 7/29. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/237:00 amORD - IND
1 stop7h 40mFrontier
Mon 8/259:29 amIND - ORD
1 stop8h 28mFrontier
Deal found 7/29$168
This American Airlines deal was found by Cheapflights users on 7/30. 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 9/208:05 amORD - IND
Nonstop1h 15mAmerican Airlines
Sat 9/277:08 amIND - ORD
Nonstop1h 17mAmerican Airlines
Deal found 7/30$176
This Southwest deal was found by Cheapflights users on 7/31. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/216:45 pmMDW - CVG
Nonstop1h 10mSouthwest
Mon 8/256:40 amCVG - MDW
Nonstop1h 10mSouthwest
Deal found 7/31$177

Cheapflights Fare Finder

 
Customize your flight search to find flights from Illinois to Indiana 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 July 31, 2025.
Use the filters below to find and compare flights from Illinois to Indiana that are best for you.

Fly from

Illinois

Fly to

Indiana

Route

Depart

Return

Price

St. LouisChicago

STL - MDW

STLMDW

Lambert-St Louis

Tue 8/26

7:10 am-8:20 am

Nonstop1h 10m

Chicago Midway

Wed 8/27

11:25 am-12:35 pm

Nonstop1h 10m

$91

St. LouisChicago

STL - ORD

STLORD

Lambert-St Louis

Sat 9/13

7:23 am-8:45 am

Nonstop1h 22m

Chicago O'Hare Intl

Sat 9/20

7:10 pm-8:32 pm

Nonstop1h 22m

$91

ChicagoLouisville

ORD - SDF

ORDSDF

Chicago O'Hare Intl

Thu 8/21

7:44 pm-10:24 pm

Nonstop1h 40m

Louisville Intl

Thu 8/28

7:00 am-7:38 am

Nonstop1h 38m

$97

ChicagoLouisville

MDW - SDF

MDWSDF

Chicago Midway

Sat 8/23

12:50 pm-3:05 pm

Nonstop1h 15m

Louisville Intl

Mon 8/25

6:25 am-6:40 am

Nonstop1h 15m

$97

St. LouisChicago

STL - ORD

STLORD

Lambert-St Louis

Tue 8/26

4:50 pm-11:05 pm

1 stop6h 15m

Chicago O'Hare Intl

Wed 8/27

11:25 am-8:00 pm

1 stop8h 35m

$111

ChicagoLouisville

ORD - SDF

ORDSDF

Chicago O'Hare Intl

Sat 8/23

11:52 am-2:19 pm

Nonstop1h 27m

Louisville Intl

Mon 8/25

6:08 pm-6:48 pm

Nonstop1h 40m

$124

St. LouisChicago

STL - ORD

STLORD

Lambert-St Louis

Thu 9/25

5:00 am-6:30 am

Nonstop1h 30m

Chicago O'Hare Intl

Sun 9/28

1:03 pm-2:27 pm

Nonstop1h 24m

$147

ChicagoLouisville

ORD - SDF

ORDSDF

Chicago O'Hare Intl

Thu 8/28

1:50 pm-11:30 pm

1 stop8h 40m

Louisville Intl

Mon 9/1

5:30 am-12:45 pm

1 stop8h 15m

$155

St. LouisChicago

STL - ORD

STLORD

Lambert-St Louis

Fri 9/12

1:00 pm-4:19 pm

1 stop3h 19m

Chicago O'Hare Intl

Fri 9/19

8:15 am-12:00 pm

1 stop3h 45m

$166

ChicagoIndianapolis

ORD - IND

ORDIND

Chicago O'Hare Intl

Sat 8/23

7:00 am-3:40 pm

1 stop7h 40m

Indianapolis

Mon 8/25

9:29 am-4:57 pm

1 stop8h 28m

$168

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/29

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

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

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

Currently, August is the cheapest month in which you can book a flight from Illinois to Indiana (average of $297). Flying from Illinois to Indiana in March is currently the most expensive (average of $361). 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 IN?

Find hourly flight availability from Illinois to Indiana. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated July 31, 2025.

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

Weekly flight availability from Illinois to Indiana

Explore weekly flight availability from Illinois to Indiana. 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 July 31, 2025.

The most flights from USIL to USIN are scheduled on a Thursday (67 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (28 on average).

Reviews of airlines servicing Indiana

Get insights into the airlines that provide service to Indiana. 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 Indiana. Reviews last updated July 31, 2025.
Read reviews from past customers who have flown Southwest, Delta, and United Airlines from Illinois to Indiana. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,246 reviews

Entertainment

7.5

Boarding

8.1

Food

7.0

Overall

8.0

Crew

8.6

Comfort

8.0

Reviews

1 / 20
8.0
Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.
Southwest
8.0
Very good
4,246 reviews
Southwest
8.0
Very good
4,246 reviews

Entertainment

7.5

Boarding

8.1

Food

7.0

Overall

8.0

Crew

8.6

Comfort

8.0

Reviews

1 / 20
8.0
Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.
Delta
8.0
Very good
7,981 reviews
Southwest
8.0
Very good
4,246 reviews

Entertainment

7.5

Boarding

8.1

Food

7.0

Overall

8.0

Crew

8.6

Comfort

8.0

Reviews

1 / 20
8.0
Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.
United Airlines
7.4
Good
8,900 reviews
Southwest
8.0
Very good
4,246 reviews

Entertainment

7.5

Boarding

8.1

Food

7.0

Overall

8.0

Crew

8.6

Comfort

8.0

Reviews

1 / 20
8.0
Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.
American Airlines
7.2
Good
10,000 reviews
Southwest
8.0
Very good
4,246 reviews

Entertainment

7.5

Boarding

8.1

Food

7.0

Overall

8.0

Crew

8.6

Comfort

8.0

Reviews

1 / 20
8.0
Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.
Allegiant Air
7.2
Good
702 reviews
Southwest
8.0
Very good
4,246 reviews

Entertainment

7.5

Boarding

8.1

Food

7.0

Overall

8.0

Crew

8.6

Comfort

8.0

Reviews

1 / 20
8.0
Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.

Related info for your journey

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

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

    One-way options have recently been found by users for as low as $46 on Southwest. Other airlines that offer cheap prices include American Airlines from $46 and United Airlines from $49 one-way.

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

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

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

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

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

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

    Currently, August is the cheapest month in which you can book a flight from Illinois to Indiana (average of $297). Flying from Illinois to Indiana in March is currently the most expensive (average of $361). 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 Illinois to Indiana

See prices for flight routes from nearby airports that may be better suited for you.
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Dallas/Fort Worth to LaGuardia flights
John F Kennedy Intl to Los Angeles flights
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Top 3 airlines flying from Illinois to Indiana

Discover the top 3 airlines that operate flights from Illinois to Indiana. 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 July 31, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$174Average$327FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$179Average$311FlexibilityNo cancel feeOn-time71%
Southern / MokuleleCheapest$189Average$233FlexibilityNo cancel feeOn-timeN/A

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