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$57+ 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 2/19. Fares are subject to change and may not be available on all flights or dates of travel.
IND — ORD
Jan 8 — Jan 151
Thu 1/8
Thu 1/15
1 adult, Economy
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Cheap 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 December 9, 2025.

This United Airlines deal was found by Cheapflights users on 12/7. 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 12/316:28 amDAY - ORD
Nonstop1h 44mUnited Airlines
Sun 1/49:20 pmORD - DAY
Nonstop1h 24mUnited Airlines
Deal found 12/7$179
This Frontier deal was found by Cheapflights users on 12/8. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/1611:57 amCVG - STL
1 stop11h 36mFrontier
Thu 12/1810:42 amSTL - CVG
1 stop7h 36mFrontier
Deal found 12/8$187
This Frontier deal was found by Cheapflights users on 12/8. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/229:26 pmCVG - ORD
1 stop12h 36mFrontier
Fri 1/26:00 amORD - CVG
1 stop11h 14mFrontier
Deal found 12/8$187
This Frontier deal was found by Cheapflights users on 12/6. 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 12/313:10 pmMDW - STL
1 stop7h 23mFrontier
Thu 1/110:42 amSTL - MDW
1 stop11h 30mFrontier
Deal found 12/6$188
This American Airlines deal was found by Cheapflights users on 12/7. 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 12/238:59 amDAY - ORD
Nonstop1h 29mAmerican Airlines
Sun 12/288:02 pmORD - DAY
Nonstop1h 19mAmerican Airlines
Deal found 12/7$194
This American Airlines deal was found by Cheapflights users on 12/9. 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 12/3112:10 pmORD - STL
Nonstop1h 26mAmerican Airlines
Tue 1/136:00 amSTL - ORD
Nonstop1h 27mAmerican Airlines
Deal found 12/9$197
This Mytrip deal was found by Cheapflights users on 12/8. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/305:05 amCVG - MDW
1 stop17h 53mFrontier
Fri 1/26:12 amMDW - CVG
1 stop11h 02mFrontier
Deal found 12/8$198
This Mytrip deal was found by Cheapflights users on 12/8. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/305:05 amCVG - ORD
1 stop13h 46mFrontier
Fri 1/26:00 amORD - CVG
1 stop11h 14mFrontier
Deal found 12/8$198
This Delta deal was found by Cheapflights users on 12/9. 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 12/316:35 amORD - STL
1 stop4h 37mDelta
Tue 1/133:40 pmSTL - ORD
1 stop6h 03mDelta
Deal found 12/9$213
This Frontier deal was found by Cheapflights users on 12/8. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/226:00 amCVG - ORD
1 stop7h 34mFrontier
Thu 12/2512:39 pmORD - CVG
1 stop5h 39mFrontier
Deal found 12/8$213
This American Airlines deal was found by Cheapflights users on 12/7. 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 12/247:07 amORD - STL
Nonstop1h 28mAmerican Airlines
Thu 12/256:00 amSTL - ORD
Nonstop1h 30mAmerican Airlines
Deal found 12/7$215
This Kiwi.com deal was found by Cheapflights users on 12/8. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/168:05 pmCVG - ORD
1 stop19h 52mMultiple Airlines
Wed 12/244:55 pmORD - CVG
1 stop29h 56mMultiple Airlines
Deal found 12/8$215

Find flight deals from Indiana to Illinois

Keep the following information in mind while searching for Indiana to Illinois flight deals. Data was last updated December 9, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$117
(American Airlines)

One-way from

$57
(Trip.com)

Popular in

November

Cheapest in

August

Average price

$244

Good round-trip deal

$254 or less

Good one-way deal

$194 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 ($2 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 December 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

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 December 9, 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

CincinnatiSt. Louis

CVG - STL

CVGSTL

Cincinnati Cinci./N. Kentucky

Thu 1/22

5:39 pm-10:23 am

1 stop17h 44m

Lambert-St Louis

Fri 1/23

5:42 pm-3:03 pm

1 stop20h 21m

$137

CincinnatiChicago

CVG - ORD

CVGORD

Cincinnati Cinci./N. Kentucky

Tue 1/13

11:54 am-5:52 pm

1 stop6h 58m

Chicago O'Hare Intl

Wed 1/14

6:05 am-5:48 pm

1 stop10h 43m

$141

LouisvilleChicago

SDF - MDW

SDFMDW

Louisville Intl

Thu 1/8

6:45 am-7:10 am

Nonstop1h 25m

Chicago Midway

Tue 1/20

6:50 am-5:00 pm

2 stops9h 10m

$159

ChicagoSt. Louis

MDW - STL

MDWSTL

Chicago Midway

Thu 1/8

6:10 am-2:48 pm

1 stop8h 38m

Lambert-St Louis

Mon 1/12

8:50 am-11:09 pm

1 stop14h 19m

$162

IndianapolisChicago

IND - ORD

INDORD

Indianapolis

Sat 1/10

12:21 pm-7:17 pm

1 stop7h 56m

Chicago O'Hare Intl

Sat 1/17

12:44 pm-9:43 am

1 stop19h 59m

$165

LouisvilleChicago

SDF - ORD

SDFORD

Louisville Intl

Thu 1/8

5:35 am-6:19 am

Nonstop1h 44m

Chicago O'Hare Intl

Tue 1/20

7:52 pm-10:30 pm

Nonstop1h 38m

$171

ChicagoSt. Louis

MDW - STL

MDWSTL

Chicago Midway

Thu 1/8

9:55 am-11:15 am

Nonstop1h 20m

Lambert-St Louis

Mon 1/12

5:55 pm-7:05 pm

Nonstop1h 10m

$171

LouisvilleChicago

SDF - ORD

SDFORD

Louisville Intl

Sat 1/17

2:05 pm-2:48 pm

Nonstop1h 43m

Chicago O'Hare Intl

Sat 1/24

7:52 pm-10:30 pm

Nonstop1h 38m

$171

LouisvilleChicago

SDF - ORD

SDFORD

Louisville Intl

Thu 1/8

11:10 am-11:53 am

Nonstop1h 43m

Chicago O'Hare Intl

Mon 1/12

7:45 am-10:23 am

Nonstop1h 38m

$171

LouisvilleChicago

SDF - MDW

SDFMDW

Louisville Intl

Thu 1/8

6:45 am-7:10 am

Nonstop1h 25m

Chicago Midway

Mon 1/12

10:00 am-12:15 pm

Nonstop1h 15m

$171

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/9

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, February is the cheapest month in which you can book a flight from Indiana to Illinois (average of $127). Flying from Indiana to Illinois in November is currently the most expensive (average of $194). 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 December 9, 2025.

Unlike at noon, when flights are generally more expensive, you can save up to 24% 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. Wednesday at noon 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 December 9, 2025.

The most flights from USIN to USIL are scheduled on a Monday (68 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (44 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 December 9, 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
7.9
Good
4,252 reviews

Entertainment

7.5

Boarding

8.1

Comfort

8.0

Crew

8.6

Food

7.0

Overall

7.9

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am
Southwest
7.9
Good
4,252 reviews
Southwest
7.9
Good
4,252 reviews

Entertainment

7.5

Boarding

8.1

Comfort

8.0

Crew

8.6

Food

7.0

Overall

7.9

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am
United Airlines
7.4
Good
9,089 reviews
Southwest
7.9
Good
4,252 reviews

Entertainment

7.5

Boarding

8.1

Comfort

8.0

Crew

8.6

Food

7.0

Overall

7.9

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am
American Airlines
7.2
Good
11,043 reviews
Southwest
7.9
Good
4,252 reviews

Entertainment

7.5

Boarding

8.1

Comfort

8.0

Crew

8.6

Food

7.0

Overall

7.9

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am
Southern / Mokulele
6.8
Okay
30 reviews
Southwest
7.9
Good
4,252 reviews

Entertainment

7.5

Boarding

8.1

Comfort

8.0

Crew

8.6

Food

7.0

Overall

7.9

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am

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 $159, Frontier can have you in Illinois from Indiana in 1h 25m. 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?

    $476 is the cheapest one-way deal found within the past few days, from American Airlines. You may also be able to find cheap deals on Air Canada and Japan Airlines, with prices starting from $563 and $594, 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, February is the cheapest month in which you can book a flight from Indiana to Illinois (average of $127). Flying from Indiana to Illinois in November is currently the most expensive (average of $194). 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

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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 December 9, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$138Average$310FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$160Average$251FlexibilityNo cancel feeOn-time69%
Southern / MokuleleCheapest$189Average$302FlexibilityNo cancel feeOn-timeN/A

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