What airlines fly to Illinois?

United Airlines, American Airlines and Southern / Mokulele are the top three most popular airlines that fly to Illinois from Indiana according to our data. United Airlines is the first choice among our users, with 55% of people opting to fly with this airline when traveling to Illinois. Keep in mind that there are 3 different airlines that fly to Illinois on a routine basis, so you have a few additional options to choose from.

How many flights depart from Indiana to Illinois on average per week?

As of September 2025, 1,185 flights take off from Indiana and land in Illinois each week. The most common flight departure day for this route is Mon, with 23% of weekly flights taking off on this day.

How many flights depart from Indiana to Illinois on average per day?

169 flights are operational daily from Indiana to Illinois as of September 2025. The most popular departure time for this route is 7:00AM, with 46% of flights per day taking off at noon.

What is the cheapest airline that flies from Indiana to Illinois?

Southwest, United Airlines, and Frontier are the most popular carriers operating from Indiana to Illinois

How long is the flight from Indiana to Illinois?

The flight from Indiana to Illinois depends on which airports you’re departing and arriving from and whether or not you have a layover. If you fly from South Bend (a popular airport in Indiana) to Chicago O'Hare Intl Airport (the most popular airport in Illinois), then the flight time is 54m on average. If you fly from Fort Wayne (another popular airport in Indiana) to Chicago O'Hare Intl Airport, then the average flight time is 1h 11m.

When did momondo last update prices for flights from Indiana to Illinois?

Prices for flights from Indiana to Illinois are updated daily.

How many operators does momondo search for flights from Indiana to Illinois?

As of September 2025, there are 6 operators available to choose from for flights from Indiana to Illinois.

How old do you have to be to fly from Indiana to Illinois?

The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Indiana to Illinois.

What documentation or ID do you need to fly to Illinois?

The necessary travel and health documents for your Illinois trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

$49 Cheap Flights from Indiana to Illinois in 2025/26

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Find the cheapest flights from Indiana to Illinois

Round-trip

One-way

Last minute

Direct

Cheap round-trip flights

9:30 am - 2:15 pmMDW-STL

4h 45m2 stops

2:15 pm - 6:50 pmSTL-MDW

4h 35m1 stop

$102Southwest

Find Deal

lun., ene. 5 - mar., ene. 6

1:45 pm - 9:30 pmORD-STL

7h 45m2 stops

8:15 am - 12:15 pmSTL-ORD

4h 00m1 stop

$102Southwest

Find Deal

lun., ene. 5 - mar., ene. 6

10:55 am - 11:33 amSDF-ORD

1h 38mnonstop

4:00 pm - 6:33 pmORD-SDF

1h 33mnonstop

$134United Airlines

Find Deal

jue., oct. 23 - sáb., oct. 25

11:01 am - 12:28 pmORD-STL

1h 27mnonstop

11:10 am - 12:40 pmSTL-ORD

1h 30mnonstop

$137United Airlines

Find Deal

jue., oct. 16 - mar., oct. 21

12:43 pm - 1:21 pmSDF-ORD

1h 38mnonstop

8:25 pm - 10:55 pmORD-SDF

1h 30mnonstop

$137American Airlines

Find Deal

mar., nov. 11 - mar., nov. 11

11:40 am - 1:05 pmORD-STL

1h 25mnonstop

5:40 pm - 7:20 pmSTL-ORD

1h 40mnonstop

$138American Airlines

Find Deal

mié., nov. 5 - mié., nov. 12

5:05 am - 10:16 amORD-STL

5h 11m1 stop

4:52 pm - 11:39 pmSTL-ORD

6h 47m1 stop

$143Frontier

Find Deal

vie., oct. 24 - vie., oct. 31

3:34 pm - 1:31 amIND-ORD

10h 57m1 stop

6:50 am - 7:24 pmORD-IND

11h 34m1 stop

$144Frontier

Find Deal

lun., oct. 20 - jue., oct. 23

1:10 pm - 4:35 pmORD-STL

3h 25m1 stop

1:00 pm - 4:19 pmSTL-ORD

3h 19m1 stop

$168Southern / Mokulele

Find Deal

mar., oct. 21 - lun., oct. 27

8:15 am - 4:35 pmORD-STL

8h 20m1 stop

1:00 pm - 7:24 amSTL-ORD

18h 24m1 stop

$183Southern / Mokulele

Find Deal

dom., oct. 19 - mar., oct. 21

United Airlines flights from Indiana to Illinois

Our best United Airlines deals on Indiana to Illinois flight tickets

United Airlines

Oct 23

SDF10:55 amLouisville Intl

1h 38m

ORD11:33 amChicago O'Hare Intl

Oct 25

ORD4:00 pmChicago O'Hare Intl

1h 33m

SDF6:33 pmLouisville Intl

$134

Find similar

United Airlines

Oct 16

ORD11:01 amChicago O'Hare Intl

1h 27m

STL12:28 pmLambert-St Louis

Oct 21

STL11:10 amLambert-St Louis

1h 30m

ORD12:40 pmChicago O'Hare Intl

$137

Find similar

United Airlines

Oct 23

SDF10:55 amLouisville Intl

1h 38m

ORD11:33 amChicago O'Hare Intl

Oct 25

ORD7:50 pmChicago O'Hare Intl

1h 40m

SDF10:30 pmLouisville Intl

$154

Find similar

American Airlines flights from Indiana to Illinois

Our best American Airlines deals on Indiana to Illinois flight tickets

American Airlines

Nov 11

SDF12:43 pmLouisville Intl

1h 38m

ORD1:21 pmChicago O'Hare Intl

Nov 11

ORD8:25 pmChicago O'Hare Intl

1h 30m

SDF10:55 pmLouisville Intl

$137

Find similar

American Airlines

Nov 5

ORD11:40 amChicago O'Hare Intl

1h 25m

STL1:05 pmLambert-St Louis

Nov 12

STL5:40 pmLambert-St Louis

1h 40m

ORD7:20 pmChicago O'Hare Intl

$138

Find similar

American Airlines

Oct 25

ORD12:12 pmChicago O'Hare Intl

1h 23m

STL1:35 pmLambert-St Louis

Oct 27

STL6:00 amLambert-St Louis

1h 23m

ORD7:23 amChicago O'Hare Intl

$154

Find similar

Fly from

Fly to

Route

Depart

Return

Price

ChicagoSt. Louis

MDW - STL

MDWSTL

Chicago Midway

lun. 1/5

9:30 am-2:15 pm

2 stops4h 45m

Lambert-St Louis

mar. 1/6

2:15 pm-6:50 pm

1 stop4h 35m

$102

ChicagoSt. Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

lun. 1/5

1:45 pm-9:30 pm

2 stops7h 45m

Lambert-St Louis

mar. 1/6

8:15 am-12:15 pm

1 stop4h 00m

$102

LouisvilleChicago

SDF - ORD

SDFORD

Louisville Intl

jue. 10/23

10:55 am-11:33 am

Nonstop1h 38m

Chicago O'Hare Intl

sáb. 10/25

4:00 pm-6:33 pm

Nonstop1h 33m

$134

ChicagoSt. Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

jue. 10/16

11:01 am-12:28 pm

Nonstop1h 27m

Lambert-St Louis

mar. 10/21

11:10 am-12:40 pm

Nonstop1h 30m

$137

LouisvilleChicago

SDF - ORD

SDFORD

Louisville Intl

mar. 11/11

12:43 pm-1:21 pm

Nonstop1h 38m

Chicago O'Hare Intl

mar. 11/11

8:25 pm-10:55 pm

Nonstop1h 30m

$137

ChicagoSt. Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

mié. 11/5

11:40 am-1:05 pm

Nonstop1h 25m

Lambert-St Louis

mié. 11/12

5:40 pm-7:20 pm

Nonstop1h 40m

$138

ChicagoSt. Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

vie. 10/24

5:05 am-10:16 am

1 stop5h 11m

Lambert-St Louis

vie. 10/31

4:52 pm-11:39 pm

1 stop6h 47m

$143

IndianapolisChicago

IND - ORD

INDORD

Indianapolis

lun. 10/20

3:34 pm-1:31 am

1 stop10h 57m

Chicago O'Hare Intl

jue. 10/23

6:50 am-7:24 pm

1 stop11h 34m

$144

ChicagoSt. Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

mar. 10/21

1:10 pm-4:35 pm

1 stop3h 25m

Lambert-St Louis

lun. 10/27

1:00 pm-4:19 pm

1 stop3h 19m

$168

ChicagoSt. Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

dom. 10/19

8:15 am-4:35 pm

1 stop8h 20m

Lambert-St Louis

mar. 10/21

1:00 pm-7:24 am

1 stop18h 24m

$183

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from Indiana to Illinois

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

Other information

What is the cheapest month to fly to Illinois?

The cheapest month to fly to Illinois from Indiana is in August. Flight prices, which tend to average around $196, are often lower during this time because this is during the off-season. If you aren’t able to travel to Illinois during the month of August, then flying in December is also cheap. Prices for this month can be found on momondo for an average of $229.

What is the cheapest day to depart on your flight to Illinois?

The cheapest day to depart from Indiana to Illinois is on a Thursday when prices can be found for as low as $599. Flights from Indiana to Illinois on a Sunday will generally be more expensive and average around $779. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

What is the cheapest time of day to depart on your flight to Illinois?

Our most recent data shows that the best time of day to fly to Illinois is in the morning. Flights from Indiana to Illinois during this time can be as low as $531. Flights at noon are often more expensive with an average ticket price of $1,065.

What is the cheapest Indiana to Illinois flight route?

Fly from Indianapolis to Chicago O'Hare Intl for the best Indiana - Illinois flight prices

How far in advance should I book a flight to Illinois?

You are more likely to see cheaper flights to Illinois from Indiana when booking weeks ahead of your departure date. In general, you can expect to find flights to Illinois for around $277 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Illinois from Indiana for as low as $139 on momondo.

What cabin class options are available on Indiana to Illinois flights?

There are 4 cabin classes available to choose from on Indiana to Illinois flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on Indiana to Illinois flights?

No. A direct flight is the cheapest option for a flight between Indiana to Illinois.

Cheap Indiana to Illinois flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Indiana to Illinois

Best Price Found	$150
Fastest flight time	1h 00m
Direct flights	Every day
Airports in Illinois	2 airports

The best one-way flight to Illinois from Indiana in the past 72 hours is $150. The best round-trip flight deal from Indiana to Illinois found on momondo in the last 72 hours is $281.

The fastest flight from Indiana to Illinois takes 1h 00m

Direct flights go from Indiana to Illinois every day.

There are 2 airports near Illinois: Chicago Midway (MDW), Lambert-St Louis (STL)

Search flight deals

When did momondo last update prices for flights from Indiana to Illinois?
Prices for flights from Indiana to Illinois are updated daily.
How many operators does momondo search for flights from Indiana to Illinois?
As of September 2025, there are 6 operators available to choose from for flights from Indiana to Illinois.
How old do you have to be to fly from Indiana to Illinois?
The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Indiana to Illinois.
What documentation or ID do you need to fly to Illinois?
The necessary travel and health documents for your Illinois trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.
What is the most popular plane model from Indiana to Illinois?
Based on momondo bookings for this flight route, the most popular plane model on flight routes from Indiana to Illinois is Embraer 175 (10.79% of total bookings). The next most popular plane models are Airbus A319 (9.57%), Embraer 175 (Enhanced Winglets) (8.78%), and Boeing 737 MAX 8 (8.21%).

Best airlines flying from Indiana to Illinois

Compare and see reviews for airlines that fly from Indiana to Illinois with momondo

Airline	Rating	Free Cancellation	Price
American Airlines	PriceFrom $145	Free Cancellation	Rating 7.2 10,000 reviews	Search American Airlines flights
United Airlines	PriceFrom $160	Free Cancellation	Rating 7.4 8,926 reviews	Search United Airlines flights
Southern / Mokulele	PriceFrom $189	Free Cancellation	Rating 6.3 25 reviews	Search Southern / Mokulele flights

Why use momondo?

Why should I use momondo to find a flight deal from Indiana to Illinois?

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Illinois from Indiana.

Can I find flights from Indiana to Illinois with flexible booking policies on momondo?

momondo does allow users to show only those flights to Illinois from Indiana which offer a flexible booking policy as well as other useful filters and features.

How can momondo help me find flights from Indiana to Illinois?

momondo helps you find the best flight between Indiana and Illinois by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

I’m not ready to book a flight from Indiana to Illinois right now. Can momondo alert me if prices change?

If you are not ready to book a flight from Indiana to Illinois now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Illinois and let you know when they change.

An easier way to manage your Illinois trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

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jue. 10/23

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Find better results for your trip to Illinois

Popular cities in Illinois

Flights to New Yorkfrom $50

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Flights to Orlandofrom $56

Flights to Las Vegasfrom $44

Flights to San Franciscofrom $60

Flights to Washington, D.C.from $56

Flights to Bostonfrom $67

Flights to Atlantafrom $51

Flights to Dallasfrom $59

Flights to Seattlefrom $102

Cheap flights from Indiana to Illinois from $49

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Indiana to Illinois departing on 10/14. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

Big names and deals

Big names and deals

Filter for what you want

Filter for what you want

Trusted and free

Trusted and free

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Find the cheapest flights from Indiana to Illinois

Cheap round-trip flights

Cheap one-way flights

Cheap last minute flights

Cheap direct flights

United Airlines flights from Indiana to Illinois

Our best United Airlines deals on Indiana to Illinois flight tickets

American Airlines flights from Indiana to Illinois

Our best American Airlines deals on Indiana to Illinois flight tickets

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Use the filters below to find and compare flights from Indiana to Illinois that are best for you.

See travel insights to Illinois from

How to get the cheapest flight ticket from Indiana to Illinois

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to Illinois?

What is the cheapest day to depart on your flight to Illinois?

What is the cheapest time of day to depart on your flight to Illinois?

Our most recent data shows that the best time of day to fly to Illinois is in the morning. Flights from Indiana to Illinois during this time can be as low as $531. Flights at noon are often more expensive with an average ticket price of $1,065.

What is the cheapest Indiana to Illinois flight route?

Fly from Indianapolis to Chicago O'Hare Intl for the best Indiana - Illinois flight prices

How far in advance should I book a flight to Illinois?

What cabin class options are available on Indiana to Illinois flights?

There are 4 cabin classes available to choose from on Indiana to Illinois flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on Indiana to Illinois flights?

No. A direct flight is the cheapest option for a flight between Indiana to Illinois.

What is the cheapest airline that flies from Indiana to Illinois?

Southwest, United Airlines, and Frontier are the most popular carriers operating from Indiana to Illinois

What airlines fly to Illinois?

How many flights depart from Indiana to Illinois on average per day?

169 flights are operational daily from Indiana to Illinois as of September 2025. The most popular departure time for this route is 7:00AM, with 46% of flights per day taking off at noon.

How many flights depart from Indiana to Illinois on average per week?

As of September 2025, 1,185 flights take off from Indiana and land in Illinois each week. The most common flight departure day for this route is Mon, with 23% of weekly flights taking off on this day.

How long is the flight from Indiana to Illinois?

Cheap Indiana to Illinois flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Indiana to Illinois

Best Price Found

Fastest flight time

Direct flights

Airports in Illinois

When did momondo last update prices for flights from Indiana to Illinois?

How many operators does momondo search for flights from Indiana to Illinois?

How old do you have to be to fly from Indiana to Illinois?

What documentation or ID do you need to fly to Illinois?

What is the most popular plane model from Indiana to Illinois?

Best airlines flying from Indiana to Illinois

Compare and see reviews for airlines that fly from Indiana to Illinois with momondo

Why use momondo?

Why should I use momondo to find a flight deal from Indiana to Illinois?

Can I find flights from Indiana to Illinois with flexible booking policies on momondo?

How can momondo help me find flights from Indiana to Illinois?

I’m not ready to book a flight from Indiana to Illinois right now. Can momondo alert me if prices change?

An easier way to manage your Illinois trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to Illinois

Popular cities in Illinois

Popular flights according to clicks in the last 7 days on momondo