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Illinois

$46+ 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 9/13. Fares are subject to change and may not be available on all flights or dates of travel.
IND — ORD
Jul 8 — Jul 151
Tue 7/8
Tue 7/15
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 July 3, 2025.

Round-trip from

$91
(Southwest)

One-way from

$46
(Southwest)

Popular in

March

Cheapest in

December

Average price

$298

Good round-trip deal

$250 or less

Good one-way deal

$99 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. 7% potential increase in price ($21 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 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 July 3, 2025.

This Southwest deal was found by Cheapflights users on 7/2. 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 8/511:25 amMDW - STL
Nonstop1h 10mSouthwest
Wed 8/68:40 amSTL - MDW
Nonstop1h 10mSouthwest
Deal found 7/2$91
This United Airlines deal was found by Cheapflights users on 7/2. 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 8/129:20 pmORD - STL
Nonstop1h 25mUnited Airlines
Tue 8/195:30 pmSTL - ORD
Nonstop1h 25mUnited Airlines
Deal found 7/2$91
This American Airlines deal was found by Cheapflights users on 7/2. 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 8/1610:08 pmORD - STL
Nonstop1h 16mAmerican Airlines
Sat 8/234:19 pmSTL - ORD
Nonstop1h 26mAmerican Airlines
Deal found 7/2$92
This United Airlines deal was found by Cheapflights users on 7/3. 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 8/46:08 pmSDF - ORD
Nonstop1h 42mUnited Airlines
Tue 8/510:55 amORD - SDF
Nonstop1h 29mUnited Airlines
Deal found 7/3$97
This Southwest deal was found by Cheapflights users on 7/1. 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 8/71:15 pmSDF - MDW
Nonstop1h 15mSouthwest
Mon 8/118:35 pmMDW - SDF
Nonstop1h 15mSouthwest
Deal found 7/1$97
This American Airlines deal was found by Cheapflights users on 7/1. 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.
Thu 8/76:08 pmSDF - ORD
Nonstop1h 40mAmerican Airlines
Mon 8/116:49 amORD - SDF
Nonstop1h 24mAmerican Airlines
Deal found 7/1$98
This Southwest deal was found by Cheapflights users on 7/1. 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 8/162:55 pmORD - STL
1 stop5h 35mSouthwest
Mon 8/187:15 amSTL - ORD
1 stop8h 05mSouthwest
Deal found 7/1$114
This Southwest deal was found by Cheapflights users on 7/1. 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 10/145:30 amSDF - ORD
1 stop7h 20mSouthwest
Wed 10/151:50 pmORD - SDF
1 stop6h 50mSouthwest
Deal found 7/1$117
This Priceline deal was found by Cheapflights users on 7/2. 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.
Fri 8/13:30 pmIND - ORD
1 stop9h 52mFrontier
Fri 8/85:01 amORD - IND
1 stop8h 43mFrontier
Deal found 7/2$122
This American Airlines deal was found by Cheapflights users on 7/1. 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.
Tue 11/45:47 pmIND - ORD
Nonstop1h 13mAmerican Airlines
Wed 11/198:00 amORD - IND
Nonstop1h 09mAmerican Airlines
Deal found 7/1$137
This Southwest deal was found by Cheapflights users on 7/1. 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 8/75:15 pmIND - MDW
Nonstop1h 05mSouthwest
Mon 8/118:55 pmMDW - IND
Nonstop1h 00mSouthwest
Deal found 7/1$137
This Southwest deal was found by Cheapflights users on 7/2. 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 8/266:20 amIND - ORD
1 stop5h 25mSouthwest
Wed 8/271:30 pmORD - IND
1 stop7h 10mSouthwest
Deal found 7/2$157

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 July 3, 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

Tue 8/5

11:25 am-12:35 pm

Nonstop1h 10m

Lambert-St Louis

Wed 8/6

8:40 am-9:50 am

Nonstop1h 10m

$91

ChicagoSt. Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

Tue 8/12

9:20 pm-10:45 pm

Nonstop1h 25m

Lambert-St Louis

Tue 8/19

5:30 pm-6:55 pm

Nonstop1h 25m

$91

ChicagoSt. Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

Sat 8/16

10:08 pm-11:24 pm

Nonstop1h 16m

Lambert-St Louis

Sat 8/23

4:19 pm-5:45 pm

Nonstop1h 26m

$92

LouisvilleChicago

SDF - ORD

SDFORD

Louisville Intl

Mon 8/4

6:08 pm-6:50 pm

Nonstop1h 42m

Chicago O'Hare Intl

Tue 8/5

10:55 am-1:24 pm

Nonstop1h 29m

$97

LouisvilleChicago

SDF - MDW

SDFMDW

Louisville Intl

Thu 8/7

7:10 pm-7:30 pm

Nonstop1h 20m

Chicago Midway

Mon 8/11

10:00 am-12:20 pm

Nonstop1h 20m

$97

LouisvilleChicago

SDF - ORD

SDFORD

Louisville Intl

Thu 8/7

6:08 pm-6:48 pm

Nonstop1h 40m

Chicago O'Hare Intl

Mon 8/11

6:49 am-9:13 am

Nonstop1h 24m

$98

ChicagoSt. Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

Sat 8/16

2:55 pm-8:30 pm

1 stop5h 35m

Lambert-St Louis

Mon 8/18

7:15 am-3:20 pm

1 stop8h 05m

$114

IndianapolisChicago

IND - ORD

INDORD

Indianapolis

Fri 8/1

3:30 pm-12:22 am

1 stop9h 52m

Chicago O'Hare Intl

Fri 8/8

5:01 am-2:44 pm

1 stop8h 43m

$122

LouisvilleChicago

SDF - ORD

SDFORD

Louisville Intl

Thu 9/4

11:50 am-4:25 pm

1 stop5h 35m

Chicago O'Hare Intl

Thu 9/11

1:50 pm-11:30 pm

1 stop8h 40m

$122

IndianapolisChicago

IND - ORD

INDORD

Indianapolis

Tue 11/4

5:47 pm-6:00 pm

Nonstop1h 13m

Chicago O'Hare Intl

Wed 11/19

8:00 am-10:09 am

Nonstop1h 09m

$137

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/2

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 July 3, 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 July 3, 2025.

The most flights from USIN to USIL are scheduled on a Wednesday (62 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (7 on average).

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 July 3, 2025.
Peruse reviews from past customers who have flown with Southwest, Delta, and United 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.
Southwest
8.0
Very good
4,266 reviews

Comfort

8.0

Crew

8.6

Boarding

8.2

Overall

8.0

Entertainment

7.6

Food

7.0

Reviews

1 / 20
8.0
Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.
Southwest
8.0
Very good
4,266 reviews
Southwest
8.0
Very good
4,266 reviews

Comfort

8.0

Crew

8.6

Boarding

8.2

Overall

8.0

Entertainment

7.6

Food

7.0

Reviews

1 / 20
8.0
Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.
Delta
8.0
Very good
7,982 reviews
Southwest
8.0
Very good
4,266 reviews

Comfort

8.0

Crew

8.6

Boarding

8.2

Overall

8.0

Entertainment

7.6

Food

7.0

Reviews

1 / 20
8.0
Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.
United Airlines
7.4
Good
8,861 reviews
Southwest
8.0
Very good
4,266 reviews

Comfort

8.0

Crew

8.6

Boarding

8.2

Overall

8.0

Entertainment

7.6

Food

7.0

Reviews

1 / 20
8.0
Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.
Allegiant Air
7.3
Good
708 reviews
Southwest
8.0
Very good
4,266 reviews

Comfort

8.0

Crew

8.6

Boarding

8.2

Overall

8.0

Entertainment

7.6

Food

7.0

Reviews

1 / 20
8.0
Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.
American Airlines
7.2
Good
10,000 reviews
Southwest
8.0
Very good
4,266 reviews

Comfort

8.0

Crew

8.6

Boarding

8.2

Overall

8.0

Entertainment

7.6

Food

7.0

Reviews

1 / 20
8.0
Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.

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.

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

    $46 is the cheapest one-way deal found within the past few days, from Southwest. You may also be able to find cheap deals on United Airlines and American Airlines, with prices starting from $46 and $49, 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 July 3, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$179Average$305FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$179Average$302FlexibilityNo cancel feeOn-time69%
Southern / MokuleleCheapest$189Average$229FlexibilityNo cancel feeOn-timeN/A

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