What airlines fly to St. Louis?

American Airlines, United Airlines and Delta are the top three most popular airlines that fly to St. Louis from Indianapolis according to our data. American Airlines is the first choice among our users, with 55% of people opting to fly with this airline when traveling to St. Louis. Keep in mind that there are 5 different airlines that fly to St. Louis on a routine basis, so you have a few additional options to choose from.

What is the cheapest airline that flies from Indianapolis to Lambert-St Louis?

Frontier, Delta, and Southwest are the most popular carriers operating from Indianapolis to Lambert-St Louis

When did momondo last update prices for flights from Indianapolis Airport to Lambert-St Louis Airport?

Prices for flights from Indianapolis Airport to Lambert-St Louis Airport were last updated today.

How many operators does momondo search for flights from Indianapolis Airport to Lambert-St Louis Airport?

As of December 2025, there is 1 operator available to choose from for flights from Indianapolis Airport to Lambert-St Louis Airport.

How old do you have to be to fly from Indianapolis Airport to Lambert-St Louis Airport?

The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Indianapolis Airport to Lambert-St Louis Airport.

What documentation or ID do you need to fly to Lambert-St Louis Airport?

The required travel and health documents for your Lambert-St Louis Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Lambert-St Louis Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

$102 Cheap Flights from Indianapolis to St. Louis in 2025/26

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Find the cheapest flights from Indianapolis to St. Louis

Round-trip

One-way

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Cheap round-trip flights

Enter your travel dates to find the best prices.

2:12 pm - 11:33 pm

IND

STL

10h 21m1 stop

5:42 pm - 9:43 am

STL

IND

15h 01m1 stop

$184Multiple Airlines

Fri, Jan 23 - Sun, Jan 25

5:10 am - 11:33 pm

IND

STL

19h 23m2 stops

5:42 pm - 9:43 am

STL

IND

15h 01m1 stop

$205Multiple Airlines

Fri, Jan 23 - Sun, Jan 25

9:34 pm - 9:21 am

IND

STL

12h 47m1 stop

3:46 pm - 3:35 pm

STL

IND

22h 49m1 stop

$214Frontier

Sun, Feb 1 - Wed, Feb 4

4:04 pm - 7:54 am

IND

STL

16h 50m2 stops

5:42 pm - 6:23 pm

STL

IND

23h 41m1 stop

$217Multiple Airlines

Thu, Jan 15 - Tue, Jan 20

4:04 pm - 6:51 am

IND

STL

15h 47m1 stop

5:42 pm - 6:23 pm

STL

IND

23h 41m1 stop

$232Multiple Airlines

Thu, Jan 15 - Tue, Jan 20

9:34 pm - 9:21 am

IND

STL

12h 47m1 stop

8:22 pm - 7:31 pm

STL

IND

22h 09m2 stops

$237Multiple Airlines

Sun, Feb 1 - Wed, Feb 4

7:18 pm - 11:19 pm

IND

STL

29h 01m1 stop

4:51 pm - 8:39 am

STL

IND

14h 48m1 stop

$295Frontier

Mon, Mar 9 - Fri, Mar 13

12:40 pm - 10:40 pm

IND

STL

11h 00m2 stops

11:35 am - 8:10 pm

STL

IND

7h 35m2 stops

$303Southwest

Sun, Feb 1 - Wed, Feb 4

10:38 am - 8:05 am

IND

STL

22h 27m1 stop

5:11 pm - 5:46 pm

STL

IND

23h 35m1 stop

$333Multiple Airlines

Sun, Jan 11 - Thu, Jan 15

7:00 am - 12:45 pm

IND

STL

6h 45m2 stops

7:50 am - 5:45 pm

STL

IND

8h 55m2 stops

$337Southwest

Fri, Jan 23 - Sun, Jan 25

American Airlines flights from Indianapolis to St. Louis

Our best American Airlines deals on Indianapolis to St. Louis flight tickets

American Airlines

Feb 20

IND1:55 pmIndianapolis

5h 13m

1 stop

STL6:08 pmLambert-St Louis

Feb 22

STL10:04 amLambert-St Louis

4h 13m

1 stop

IND3:17 pmIndianapolis

$503

Find similar

American Airlines

Dec 29

IND9:44 amIndianapolis

4h 52m

1 stop

STL1:36 pmLambert-St Louis

Dec 29

STL4:53 pmLambert-St Louis

4h 36m

1 stop

IND10:29 pmIndianapolis

$679

Find similar

Southwest flights from Indianapolis to St. Louis

Our best Southwest deals on Indianapolis to St. Louis flight tickets

Southwest

Feb 1

IND12:40 pmIndianapolis

11h 00m

2 stops

STL10:40 pmLambert-St Louis

Feb 4

STL11:35 amLambert-St Louis

7h 35m

2 stops

IND8:10 pmIndianapolis

$303

Find similar

Southwest

Feb 20

IND6:55 amIndianapolis

3h 20m

1 stop

STL9:15 amLambert-St Louis

Feb 22

STL10:35 amLambert-St Louis

10h 50m

2 stops

IND10:25 pmIndianapolis

$322

Find similar

Southwest

Feb 20

IND2:00 pmIndianapolis

7h 15m

2 stops

STL8:15 pmLambert-St Louis

Feb 22

STL10:35 amLambert-St Louis

10h 50m

2 stops

IND10:25 pmIndianapolis

$327

Find similar

Fly from

Fly to

Route

Depart

Return

Price

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Fri 1/23

2:12 pm-11:33 pm

1 stop10h 21m

Lambert-St Louis

Sun 1/25

5:42 pm-9:43 am

1 stop15h 01m

$184

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Fri 1/23

5:10 am-11:33 pm

2 stops19h 23m

Lambert-St Louis

Sun 1/25

5:42 pm-9:43 am

1 stop15h 01m

$205

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Sun 2/1

9:34 pm-9:21 am

1 stop12h 47m

Lambert-St Louis

Wed 2/4

3:46 pm-3:35 pm

1 stop22h 49m

$214

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Thu 1/15

4:04 pm-7:54 am

2 stops16h 50m

Lambert-St Louis

Tue 1/20

5:42 pm-6:23 pm

1 stop23h 41m

$217

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Thu 1/15

4:04 pm-6:51 am

1 stop15h 47m

Lambert-St Louis

Tue 1/20

5:42 pm-6:23 pm

1 stop23h 41m

$232

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Sun 2/1

9:34 pm-9:21 am

1 stop12h 47m

Lambert-St Louis

Wed 2/4

8:22 pm-7:31 pm

2 stops22h 09m

$237

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Mon 3/9

7:18 pm-11:19 pm

1 stop29h 01m

Lambert-St Louis

Fri 3/13

4:51 pm-8:39 am

1 stop14h 48m

$295

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Sun 2/1

12:40 pm-10:40 pm

2 stops11h 00m

Lambert-St Louis

Wed 2/4

11:35 am-8:10 pm

2 stops7h 35m

$303

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Sun 1/11

10:38 am-8:05 am

1 stop22h 27m

Lambert-St Louis

Thu 1/15

5:11 pm-5:46 pm

1 stop23h 35m

$333

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Fri 1/23

7:00 am-12:45 pm

2 stops6h 45m

Lambert-St Louis

Sun 1/25

7:50 am-5:45 pm

2 stops8h 55m

$337

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 Indianapolis to St. Louis

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

What is the cheapest month to fly to St. Louis?

In general, November is the cheapest month to fly from Indianapolis to St. Louis. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $256. The month of April is another great option to travel to St. Louis, with average flight prices from Indianapolis averaging around $289.

What is the cheapest day to depart on your flight to St. Louis?

The cheapest day to depart on your flight to St. Louis is on a Tuesday when prices can be found for as low as $265. This is often the case because there is less demand to fly during this day of the week. If your travel schedule is flexible, try to avoid departing on a Monday because tickets tend to average around $392. These prices are subject to change though, so be sure to set up a Price Alert for flights to St. Louis.

What is the cheapest time of day to depart on your flight to St. Louis?

Flying to St. Louis from Indianapolis in the evening is the least expensive time of day to depart. momondo users have found prices as low as $291 when looking at flights departing in the evening. At noon is when there is more demand to fly to St. Louis, so prices are often more expensive at around $345 per ticket.

How have Indianapolis to St. Louis flight prices changed over time?

As of December 2025, prices for Indianapolis to St. Louis flights are approximately 15% cheaper when compared to flights at the same time last year.

When to book flights from Indianapolis to St. Louis

Are you open to changing your travel dates? Check out the ideal times to fly from Indianapolis to St. Louis according to our flight data. Find out which month and days have the cheapest flights.

Estimated round-trip price

Cheap Indianapolis to St. Louis (IND to STL) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Indianapolis to St. Louis

Fastest flight time	5h 37m
Direct flights	None

The fastest flight from Indianapolis to St. Louis takes 5h 37m

There are no direct flights from Indianapolis to St. Louis. There are no popular flight routes from Indianapolis to St. Louis.

Search flight deals

How far is Indianapolis to Lambert-St Louis by plane?
The distance between Indianapolis and Lambert-St Louis is about 230.0 mi. Typically, this will take 5h 37m by plane in normal conditions.
When did momondo last update prices for flights from Indianapolis Airport to Lambert-St Louis Airport?
Prices for flights from Indianapolis Airport to Lambert-St Louis Airport were last updated today.
How many operators does momondo search for flights from Indianapolis Airport to Lambert-St Louis Airport?
As of December 2025, there is 1 operator available to choose from for flights from Indianapolis Airport to Lambert-St Louis Airport.
How old do you have to be to fly from Indianapolis Airport to Lambert-St Louis Airport?
The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Indianapolis Airport to Lambert-St Louis Airport.
What documentation or ID do you need to fly to Lambert-St Louis Airport?
The required travel and health documents for your Lambert-St Louis Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Lambert-St Louis Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.
What is the most popular airline from Indianapolis to St. Louis?
momondo data reveals that the most frequently booked airline on the route from Indianapolis to St. Louis is American Airlines, representing 100% of all bookings.

Best airlines flying from Indianapolis to St. Louis

Compare and see reviews for airlines that fly from Indianapolis to St. Louis with momondo

Airline	Rating	Free Cancellation	Price
American Airlines	PriceFrom $196	Free Cancellation	Rating 7.2 11,072 reviews		Search American Airlines flights

St. Charles

Chesterfield

Hermann

Fairview Heights

Maryland Heights

O'Fallon

Florissant

Fenton

Collinsville

St. Peters

Wentzville

Alton

Farmington

Clayton

Glencoe

Eureka

Festus

Edwardsville

Litchfield

Shrewsbury

Why use momondo?

Why should I use momondo to find a flight deal from Indianapolis to St. Louis?

It is quick and easy to find Indianapolis to St. Louis flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to St. Louis that suits you.

Can I find flights from Indianapolis to St. Louis with flexible booking policies on momondo?

Yes. momondo enables you to select and highlight flights to St. Louis from Indianapolis with this policy.

How can momondo help me find flights from Indianapolis to St. Louis?

momondo helps you find the best flight between Indianapolis and St. Louis 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 Indianapolis to St. Louis right now. Can momondo alert me if prices change?

Of course. momondo tracks the price of Indianapolis to St. Louis flights. All you need is a valid email address and we will do the rest; it is that quick and easy.