$64+ 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 1/27. Fares are subject to change and may not be available on all flights or dates of travel.
IND — ORD
Feb 4 — Feb 111
1 adult, Economy
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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
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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
Cheapest flights from Indiana to IllinoisExplore 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 January 5, 2026.
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 January 5, 2026.
This Frontier deal was found by Cheapflights users on 1/3. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 1/172:27 pmCVG - STL
1 stop9h 07mFrontier
Sat 1/2412:12 pmSTL - CVG
1 stop9h 08mFrontier
Deal found 1/3![Frontier logo]()
$144
This Mytrip deal was found by Cheapflights users on 1/3. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 1/319:00 amCVG - ORD
1 stop8h 40mFrontier
Sat 2/79:25 amORD - CVG
1 stop8h 02mFrontier
Deal found 1/3![Frontier logo]()
$144
This Kiwi.com deal was found by Cheapflights users on 1/3. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/171:31 pmCVG - ORD
1 stop22h 51mMultiple Airlines
Tue 2/248:30 amORD - CVG
1 stop11h 55mMultiple Airlines
Deal found 1/3![Multiple Airlines logo]()
$148
This Kiwi.com deal was found by Cheapflights users on 1/2. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/79:25 amORD - STL
1 stop14h 08mFrontier
Mon 2/95:42 pmSTL - ORD
1 stop22h 10mFrontier
Deal found 1/2![Frontier logo]()
$151
This Kiwi.com deal was found by Cheapflights users on 1/4. 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 2/312:44 pmORD - STL
1 stop10h 49mMultiple Airlines
Mon 2/95:42 pmSTL - ORD
1 stop22h 10mMultiple Airlines
Deal found 1/4![Multiple Airlines logo]()
$152
This Kiwi.com deal was found by Cheapflights users on 1/4. 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.
Wed 2/188:18 pmIND - ORD
1 stop28h 06mMultiple Airlines
Wed 2/258:16 pmORD - IND
1 stop22h 07mMultiple Airlines
Deal found 1/4![Multiple Airlines logo]()
$153
This Mytrip deal was found by Cheapflights users on 1/4. 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 2/35:10 amIND - ORD
1 stop16h 53mSpirit Airlines
Tue 2/107:20 amORD - IND
1 stop14h 28mSpirit Airlines
Deal found 1/4![Spirit Airlines logo]()
$156
This Southwest deal was found by Cheapflights users on 1/2. 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.
Sat 2/73:55 pmMDW - STL
Nonstop1h 15mSouthwest
Mon 2/94:30 pmSTL - MDW
Nonstop1h 10mSouthwest
Deal found 1/2![Southwest logo]()
$157
This Delta deal was found by Cheapflights users on 1/3. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/1810:46 amSDF - ORD
1 stop3h 34mDelta
Wed 2/252:05 pmORD - SDF
1 stop6h 13mDelta
Deal found 1/3![Delta logo]()
$157
This Delta deal was found by Cheapflights users on 1/3. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/188:55 amSDF - MDW
1 stop4h 04mDelta
Wed 2/2512:45 pmMDW - SDF
1 stop5h 17mDelta
Deal found 1/3![Delta logo]()
$157
This Kiwi.com deal was found by Cheapflights users on 1/4. 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.
Mon 2/27:33 pmIND - ORD
1 stop27h 11mMultiple Airlines
Mon 2/912:05 pmORD - IND
1 stop22h 21mMultiple Airlines
Deal found 1/4![Multiple Airlines logo]()
$158
This Expedia deal was found by Cheapflights users on 1/4. 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.
Thu 1/2212:38 pmIND - ORD
1 stop11h 08mFrontier
Mon 1/265:40 amORD - IND
1 stop5h 03mFrontier
Deal found 1/4![Frontier logo]()
$160
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 January 5, 2026.
Most accurate provider | eDreams 3 stars |
|---|---|
Most trusted provider | eDreams 3 stars |
Round-trip from | $144 (Frontier) |
One-way from | $64 (Expedia) |
Popular in | November |
Cheapest in | August |
Average price | $245 |
Good round-trip deal | $305 or less |
Good one-way deal | $148 or less |
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 January 5, 2026.
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
ORD - STL
ORDSTL
Chicago O'Hare Intl
Sat 2/7
9:25 am-11:33 pm
1 stop14h 08m
Lambert-St Louis
Mon 2/9
5:42 pm-3:52 pm
1 stop22h 10m
$151
LouisvilleChicago
SDF - ORD
SDFORD
Louisville Intl
Wed 2/18
10:46 am-1:20 pm
1 stop3h 34m
Chicago O'Hare Intl
Wed 2/25
2:05 pm-9:18 pm
1 stop6h 13m
$157
IndianapolisChicago
IND - ORD
INDORD
Indianapolis
Mon 2/2
7:33 pm-9:44 pm
1 stop27h 11m
Chicago O'Hare Intl
Mon 2/9
12:05 pm-11:26 am
1 stop22h 21m
$158
IndianapolisChicago
IND - ORD
INDORD
Indianapolis
Mon 2/2
12:38 pm-10:46 pm
1 stop11h 08m
Chicago O'Hare Intl
Mon 2/9
5:40 am-11:43 am
1 stop5h 03m
$160
IndianapolisChicago
IND - ORD
INDORD
Indianapolis
Thu 1/22
12:38 pm-10:46 pm
1 stop11h 08m
Chicago O'Hare Intl
Mon 1/26
5:40 am-11:43 am
1 stop5h 03m
$160
CincinnatiSt. Louis
CVG - STL
CVGSTL
Cincinnati Cinci./N. Kentucky
Thu 1/22
5:39 pm-11:33 pm
1 stop6h 54m
Lambert-St Louis
Mon 1/26
10:16 am-11:26 pm
1 stop12h 10m
$160
LouisvilleChicago
SDF - MDW
SDFMDW
Louisville Intl
Sat 1/17
6:30 am-6:55 am
Nonstop1h 25m
Chicago Midway
Sun 1/18
10:00 am-12:15 pm
Nonstop1h 15m
$161
LouisvilleChicago
SDF - MDW
SDFMDW
Louisville Intl
Wed 2/18
10:46 am-6:40 pm
2 stops8h 54m
Chicago Midway
Wed 2/25
9:34 am-8:28 pm
2 stops9h 54m
$168
IndianapolisChicago
IND - ORD
INDORD
Indianapolis
Tue 2/3
5:10 am-9:03 pm
1 stop16h 53m
Chicago O'Hare Intl
Sun 2/8
4:38 pm-12:18 am
1 stop6h 40m
$171
ChicagoSt. Louis
ORD - STL
ORDSTL
Chicago O'Hare Intl
Mon 2/2
4:19 pm-11:33 pm
2 stops31h 14m
Lambert-St Louis
Mon 2/9
5:42 pm-3:52 pm
1 stop22h 10m
$174
Showing 1-10 of 60 results
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 January 5, 2026.
Unlike at noon, when flights are generally more expensive, you can save up to 37% 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 January 3, 2026.
Travelers seeking maximum savings on their Indiana to Illinois flight should consider departing on Tuesday afternoons when fares are most often at their lowest. Sunday 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 January 5, 2026.
The most flights from USIN to USIL are scheduled on a Sunday (65 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (3 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 January 5, 2026.
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.
Food
7.0
Entertainment
7.5
Boarding
8.1
Comfort
8.0
Overall
8.0
Crew
8.6
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Food
7.0
Entertainment
7.5
Boarding
8.1
Comfort
8.0
Overall
8.0
Crew
8.6
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Food
7.0
Entertainment
7.5
Boarding
8.1
Comfort
8.0
Overall
8.0
Crew
8.6
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Food
7.0
Entertainment
7.5
Boarding
8.1
Comfort
8.0
Overall
8.0
Crew
8.6
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Food
7.0
Entertainment
7.5
Boarding
8.1
Comfort
8.0
Overall
8.0
Crew
8.6
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
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.
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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.
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 January 5, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$137 | Average$313 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$160 | Average$250 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$189 | Average$302 | FlexibilityNo cancel fee | On-timeN/A |