HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Illinois

$49+ 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 12/31. Fares are subject to change and may not be available on all flights or dates of travel.
IND — ORD
Dec 10 — Dec 171
Wed 12/10
Wed 12/17
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Indiana to Illinois with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

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 November 10, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$97
(United Airlines)

One-way from

$49
(Southwest)

Popular in

November

Cheapest in

August

Average price

$327

Good round-trip deal

$282 or less

Good one-way deal

$161 or less
Provider with most accurate pricing for Indianapolis-Chicago (CHI) flight deals.
Search Deals
Provider most trusted by Cheapflights users for Indianapolis-Chicago (CHI) flights.
Search Deals
From Indiana to Illinois
Search Deals
One-way flight from Indiana to Illinois
Search Deals
Highest demand for flights based on searches. 0% potential increase in price ($0 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($6 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in November 2025
Search Deals
Price to beat on a round-trip flight from Indiana to Illinois.
Search Deals
Price to beat on a one-way flight from Indiana to Illinois.
Search Deals

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 November 10, 2025.

This United Airlines deal was found by Cheapflights users on 11/10. 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 12/245:40 amSDF - ORD
Nonstop1h 44mUnited Airlines
Wed 12/3110:35 amORD - SDF
Nonstop1h 38mUnited Airlines
Deal found 11/10$97
This American Airlines deal was found by Cheapflights users on 11/10. 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 12/258:05 amSDF - ORD
Nonstop1h 40mAmerican Airlines
Thu 1/18:53 pmORD - SDF
Nonstop1h 37mAmerican Airlines
Deal found 11/10$109
This American Airlines deal was found by Cheapflights users on 11/9. 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 12/91:02 pmSDF - ORD
Nonstop1h 42mAmerican Airlines
Tue 12/168:20 pmORD - SDF
Nonstop1h 36mAmerican Airlines
Deal found 11/9$117
This Southwest deal was found by Cheapflights users on 11/8. 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.
Wed 12/36:45 amSDF - MDW
Nonstop1h 15mSouthwest
Tue 12/98:50 pmMDW - SDF
Nonstop1h 15mSouthwest
Deal found 11/8$117
This American Airlines deal was found by Cheapflights users on 11/10. 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 12/31:02 pmSDF - ORD
Nonstop1h 42mAmerican Airlines
Tue 12/98:20 pmORD - SDF
Nonstop1h 36mAmerican Airlines
Deal found 11/10$118
This Expedia deal was found by Cheapflights users on 11/9. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/811:57 amCVG - STL
1 stop11h 36mFrontier
Mon 12/159:54 amSTL - CVG
1 stop8h 51mFrontier
Deal found 11/9$130
This Frontier deal was found by Cheapflights users on 11/10. 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 12/113:10 pmMDW - STL
1 stop7h 23mFrontier
Sat 12/137:43 pmSTL - MDW
1 stop15h 25mFrontier
Deal found 11/10$132
This Southwest deal was found by Cheapflights users on 11/8. 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 12/67:10 amSDF - MDW
Nonstop1h 20mSouthwest
Tue 12/910:05 amMDW - SDF
Nonstop1h 25mSouthwest
Deal found 11/8$144
This United Airlines deal was found by Cheapflights users on 11/10. 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 12/69:23 pmORD - STL
Nonstop1h 22mUnited Airlines
Tue 12/910:00 amSTL - ORD
Nonstop1h 29mUnited Airlines
Deal found 11/10$144
This American Airlines deal was found by Cheapflights users on 11/9. 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 12/31:02 pmSDF - ORD
Nonstop1h 42mAmerican Airlines
Mon 12/87:26 pmORD - SDF
Nonstop1h 34mAmerican Airlines
Deal found 11/9$146
This Delta deal was found by Cheapflights users on 11/9. 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 12/245:59 pmMDW - STL
1 stop4h 17mDelta
Wed 12/315:13 pmSTL - MDW
1 stop5h 09mDelta
Deal found 11/9$157
This Delta deal was found by Cheapflights users on 11/10. 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 12/312:37 pmSDF - ORD
1 stop5h 20mDelta
Tue 12/94:20 pmORD - SDF
1 stop4h 11mDelta
Deal found 11/10$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 November 10, 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

LouisvilleChicago

SDF - MDW

SDFMDW

Louisville Intl

Wed 12/3

6:45 am-7:00 am

Nonstop1h 15m

Chicago Midway

Tue 12/9

8:50 pm-11:05 pm

Nonstop1h 15m

$117

ChicagoSt. Louis

MDW - STL

MDWSTL

Chicago Midway

Thu 1/1

8:25 am-9:40 am

Nonstop1h 15m

Lambert-St Louis

Mon 1/5

2:30 pm-3:40 pm

Nonstop1h 10m

$134

LouisvilleChicago

SDF - MDW

SDFMDW

Louisville Intl

Thu 1/1

6:45 am-7:00 am

Nonstop1h 15m

Chicago Midway

Mon 1/5

9:30 am-11:45 am

Nonstop1h 15m

$134

ChicagoSt. Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

Sat 12/6

9:23 pm-10:45 pm

Nonstop1h 22m

Lambert-St Louis

Tue 12/9

10:00 am-11:29 am

Nonstop1h 29m

$144

ChicagoSt. Louis

MDW - STL

MDWSTL

Chicago Midway

Thu 12/25

5:59 pm-10:16 pm

1 stop4h 17m

Lambert-St Louis

Thu 1/1

6:05 am-11:06 am

1 stop5h 01m

$157

LouisvilleChicago

SDF - ORD

SDFORD

Louisville Intl

Wed 12/3

12:37 pm-4:57 pm

1 stop5h 20m

Chicago O'Hare Intl

Tue 12/9

6:10 pm-11:59 pm

1 stop4h 49m

$157

ChicagoSt. Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

Wed 12/24

9:10 pm-10:43 pm

Nonstop1h 33m

Lambert-St Louis

Wed 12/31

11:05 am-12:40 pm

Nonstop1h 35m

$157

LouisvilleChicago

SDF - ORD

SDFORD

Louisville Intl

Wed 1/14

4:56 pm-9:42 pm

1 stop5h 46m

Chicago O'Hare Intl

Sat 1/17

5:55 pm-11:55 pm

1 stop5h 00m

$157

LouisvilleChicago

SDF - MDW

SDFMDW

Louisville Intl

Tue 4/14

2:15 pm-6:31 pm

1 stop5h 16m

Chicago Midway

Wed 4/15

9:30 am-1:38 pm

1 stop3h 08m

$157

ChicagoSt. Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

Wed 12/31

5:31 pm-11:38 pm

1 stop6h 07m

Lambert-St Louis

Tue 1/13

6:35 am-1:07 pm

1 stop6h 32m

$157

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/9

Showing 1-10 of 60 results
1
2
3
...
6

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 $135). Flying from Indiana to Illinois in April is currently the most expensive (average of $191). 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 November 10, 2025.

Unlike in the evening, when flights are generally more expensive, you can save up to 20% on flights from Indiana to Illinois by exploring options for tickets in the morning.

What is the cheapest day to fly from Indiana to Illinois?

Use this chart to determine the cheapest time to fly round-trip from Indiana to Illinois. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their Indiana to Illinois flight should consider departing on Tuesday afternoons when fares are most often at their lowest. Monday evenings flights should be avoided if possible as fares are typically the most expensive at this time.

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 November 10, 2025.

The most flights from USIN to USIL are scheduled on a Monday (67 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (50 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 November 10, 2025.
Peruse reviews from past customers who have flown with Southwest, 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.
Southwest
8.0
Very good
4,236 reviews

Overall

8.0

Comfort

8.0

Boarding

8.1

Crew

8.6

Entertainment

7.5

Food

7.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
Southwest
8.0
Very good
4,236 reviews
Southwest
8.0
Very good
4,236 reviews

Overall

8.0

Comfort

8.0

Boarding

8.1

Crew

8.6

Entertainment

7.5

Food

7.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
United Airlines
7.4
Good
9,012 reviews
Southwest
8.0
Very good
4,236 reviews

Overall

8.0

Comfort

8.0

Boarding

8.1

Crew

8.6

Entertainment

7.5

Food

7.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
American Airlines
7.2
Good
11,045 reviews
Southwest
8.0
Very good
4,236 reviews

Overall

8.0

Comfort

8.0

Boarding

8.1

Crew

8.6

Entertainment

7.5

Food

7.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
Southern / Mokulele
6.3
Okay
26 reviews
Southwest
8.0
Very good
4,236 reviews

Overall

8.0

Comfort

8.0

Boarding

8.1

Crew

8.6

Entertainment

7.5

Food

7.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines

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 $117, Southwest can have you in Illinois from Indiana in 1h 15m. 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?

    $49 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 Frontier, with prices starting from $49 and $61, 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 $135). Flying from Indiana to Illinois in April is currently the most expensive (average of $191). 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Indiana to Illinois

See prices for flight routes from nearby airports that may be better suited for you.
Los Angeles to John F Kennedy Intl flights
John F Kennedy Intl to Miami flights
John F Kennedy Intl to Fort Lauderdale flights
John F Kennedy Intl to Los Angeles flights
Newark to Fort Lauderdale flights
Los Angeles to Newark flights
LaGuardia to Fort Lauderdale flights
Dallas/Fort Worth to LaGuardia flights
John F Kennedy Intl to Orlando flights
Dallas/Fort Worth to John F Kennedy Intl flights
San Francisco to John F Kennedy Intl flights
Newark to Miami flights
John F Kennedy Intl to Las Vegas flights
LaGuardia to Dallas/Fort Worth flights
John F Kennedy Intl to Dallas/Fort Worth flights
Dallas/Fort Worth to Newark flights
LaGuardia to Miami flights
Newark to Dallas/Fort Worth flights
Newark to Los Angeles flights
Dallas/Fort Worth to Las Vegas flights
San Francisco to Newark flights
Newark to Orlando flights
Atlanta to John F Kennedy Intl flights
Newark to West Palm Beach flights
San Francisco to Las Vegas flights
Newark to Las Vegas flights
O'Hare Intl to Las Vegas flights
John F Kennedy Intl to San Francisco flights
LaGuardia to Orlando flights
Los Angeles to Honolulu flights
Hobby to LaGuardia flights
Atlanta to LaGuardia flights
Fort Lauderdale to Newark flights
Los Angeles to Seattle flights
John F Kennedy Intl to Atlanta flights
Seattle to Los Angeles flights
Los Angeles to LaGuardia flights
Hobby to John F Kennedy Intl flights
John F Kennedy Intl to West Palm Beach flights
Boston to Fort Lauderdale flights
Hobby to Newark flights
LaGuardia to Hobby flights
Los Angeles to Dallas/Fort Worth flights
John F Kennedy Intl to Tampa flights
Fort Lauderdale to John F Kennedy Intl flights
Newark to Hobby flights
Seattle to Las Vegas flights
Dallas/Fort Worth to Los Angeles flights
Orlando to John F Kennedy Intl flights
Dallas/Fort Worth to Orlando flights

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 November 10, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$141Average$301FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$160Average$274FlexibilityNo cancel feeOn-time69%
Southern / MokuleleCheapest$189Average$302FlexibilityNo cancel feeOn-timeN/A

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.