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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 8/5. Fares are subject to change and may not be available on all flights or dates of travel.
IND — ORD
Jun 17 — Jun 241
Tue 6/17
Tue 6/24
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 June 12, 2025.

Round-trip from

$97
(American Airlines)

One-way from

$49
(Southwest)

Popular in

March

Cheapest in

December

Average price

$277

Good round-trip deal

$316 or less

Good one-way deal

$94 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 ($6 potential savings vs. average RT price).
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Average for round-trip flights in June 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 June 12, 2025.

This American Airlines deal was found by Cheapflights users on 6/12. 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.
Mon 8/46:50 pmSDF - ORD
Nonstop1h 35mAmerican Airlines
Wed 8/273:13 pmORD - SDF
Nonstop1h 25mAmerican Airlines
Deal found 6/12$97
This Southwest deal was found by Cheapflights users on 6/10. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/43:55 pmSDF - MDW
Nonstop1h 15mSouthwest
Wed 8/2710:05 amMDW - SDF
Nonstop1h 20mSouthwest
Deal found 6/10$97
This Southwest deal was found by Cheapflights users on 6/12. 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 8/72:35 pmMDW - STL
Nonstop1h 10mSouthwest
Mon 8/113:55 pmSTL - MDW
1 stop4h 55mSouthwest
Deal found 6/12$107
This American Airlines deal was found by Cheapflights users on 6/10. 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.
Mon 8/183:55 pmIND - ORD
Nonstop1h 23mAmerican Airlines
Mon 8/1810:07 pmORD - IND
Nonstop1h 13mAmerican Airlines
Deal found 6/10$109
This Southwest deal was found by Cheapflights users on 6/10. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/186:35 amIND - MDW
Nonstop1h 05mSouthwest
Mon 8/188:55 pmMDW - IND
Nonstop1h 00mSouthwest
Deal found 6/10$109
This United Airlines deal was found by Cheapflights users on 6/11. 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 9/2910:55 amSDF - ORD
Nonstop1h 38mUnited Airlines
Mon 9/297:50 pmORD - SDF
Nonstop1h 40mUnited Airlines
Deal found 6/11$116
This Southwest deal was found by Cheapflights users on 6/11. 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 9/25:30 amSDF - ORD
1 stop7h 20mSouthwest
Tue 9/97:30 amORD - SDF
1 stop6h 05mSouthwest
Deal found 6/11$117
This Southwest deal was found by Cheapflights users on 6/12. 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 8/75:45 pmORD - STL
1 stop4h 50mSouthwest
Mon 8/117:15 amSTL - ORD
1 stop8h 05mSouthwest
Deal found 6/12$117
This American Airlines deal was found by Cheapflights users on 6/11. 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 8/96:55 amORD - STL
Nonstop1h 25mAmerican Airlines
Mon 8/116:00 amSTL - ORD
Nonstop1h 24mAmerican Airlines
Deal found 6/11$124
This Southwest deal was found by Cheapflights users on 6/11. 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 8/276:20 amIND - ORD
1 stop5h 25mSouthwest
Wed 9/33:10 pmORD - IND
1 stop4h 50mSouthwest
Deal found 6/11$129
This United Airlines deal was found by Cheapflights users on 6/12. 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 8/282:20 pmORD - STL
Nonstop1h 24mUnited Airlines
Mon 9/15:30 pmSTL - ORD
Nonstop1h 25mUnited Airlines
Deal found 6/12$157
This Jettzy deal was found by Cheapflights users on 6/12. 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.
Sun 7/278:15 amORD - STL
1 stop8h 30mSouthern / Mokulele
Sun 8/35:15 pmSTL - ORD
1 stop3h 37mSouthern / Mokulele
Deal found 6/12$165

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 June 12, 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 - ORD

SDFORD

Louisville Intl

Mon 8/4

6:50 pm-7:25 pm

Nonstop1h 35m

Chicago O'Hare Intl

Wed 8/27

3:13 pm-5:38 pm

Nonstop1h 25m

$97

LouisvilleChicago

SDF - MDW

SDFMDW

Louisville Intl

Mon 8/4

3:55 pm-4:10 pm

Nonstop1h 15m

Chicago Midway

Wed 8/27

10:05 am-12:25 pm

Nonstop1h 20m

$97

ChicagoSt. Louis

MDW - STL

MDWSTL

Chicago Midway

Thu 8/7

2:35 pm-3:45 pm

Nonstop1h 10m

Lambert-St Louis

Mon 8/11

3:55 pm-8:50 pm

1 stop4h 55m

$107

IndianapolisChicago

IND - ORD

INDORD

Indianapolis

Mon 8/18

3:55 pm-4:18 pm

Nonstop1h 23m

Chicago O'Hare Intl

Mon 8/18

10:07 pm-12:20 am

Nonstop1h 13m

$109

IndianapolisChicago

IND - MDW

INDMDW

Indianapolis

Mon 8/18

6:35 am-6:40 am

Nonstop1h 05m

Chicago Midway

Mon 8/18

8:55 pm-10:55 pm

Nonstop1h 00m

$109

LouisvilleChicago

SDF - ORD

SDFORD

Louisville Intl

Mon 9/29

10:55 am-11:33 am

Nonstop1h 38m

Chicago O'Hare Intl

Mon 9/29

7:50 pm-10:30 pm

Nonstop1h 40m

$116

LouisvilleChicago

SDF - ORD

SDFORD

Louisville Intl

Tue 9/2

5:30 am-11:50 am

1 stop7h 20m

Chicago O'Hare Intl

Tue 9/9

7:30 am-2:35 pm

1 stop6h 05m

$117

ChicagoSt. Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

Thu 8/7

5:45 pm-10:35 pm

1 stop4h 50m

Lambert-St Louis

Mon 8/11

5:10 am-10:45 am

1 stop5h 35m

$117

ChicagoSt. Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

Sat 8/9

6:55 am-8:20 am

Nonstop1h 25m

Lambert-St Louis

Mon 8/11

6:00 am-7:24 am

Nonstop1h 24m

$124

IndianapolisChicago

IND - ORD

INDORD

Indianapolis

Wed 8/27

6:20 am-10:45 am

1 stop5h 25m

Chicago O'Hare Intl

Wed 9/3

3:10 pm-9:00 pm

1 stop4h 50m

$129

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/10

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 June 12, 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 June 12, 2025.

The most flights from USIN to USIL are scheduled on a Wednesday (73 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (32 on average).

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 June 12, 2025.
To help decide which airline to fly from Indiana to Illinois, see what other customers have to say about Southwest, Delta and United Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,287 reviews

Food

7.1

Boarding

8.2

Comfort

8.0

Overall

8.0

Entertainment

7.6

Crew

8.6

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
4,287 reviews
Southwest
8.0
Very good
4,287 reviews

Food

7.1

Boarding

8.2

Comfort

8.0

Overall

8.0

Entertainment

7.6

Crew

8.6

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
7,950 reviews
Southwest
8.0
Very good
4,287 reviews

Food

7.1

Boarding

8.2

Comfort

8.0

Overall

8.0

Entertainment

7.6

Crew

8.6

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
8,790 reviews
Southwest
8.0
Very good
4,287 reviews

Food

7.1

Boarding

8.2

Comfort

8.0

Overall

8.0

Entertainment

7.6

Crew

8.6

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
725 reviews
Southwest
8.0
Very good
4,287 reviews

Food

7.1

Boarding

8.2

Comfort

8.0

Overall

8.0

Entertainment

7.6

Crew

8.6

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
4,287 reviews

Food

7.1

Boarding

8.2

Comfort

8.0

Overall

8.0

Entertainment

7.6

Crew

8.6

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?

    $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 American Airlines and United Airlines, with prices starting from $49 and $62, 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 June 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$179Average$278FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$179Average$307FlexibilityNo cancel feeOn-time71%
Southern / MokuleleCheapest$189Average$228FlexibilityNo cancel feeOn-timeN/A

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