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 47% 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 is the most popular carrier 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 January 2026, 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.

$60 Cheap Flights from Indianapolis to St. Louis in 2026

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Find the cheapest flights from Indianapolis to St. Louis

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

9:13 pm - 10:27 pm

IND

STL

26h 14m

1 stop

3:49 pm - 12:28 pm

STL

IND

19h 39m

1 stop

$152Frontier

Tue, Feb 24 - Tue, Mar 3

9:13 pm - 10:27 pm

IND

STL

26h 14m

1 stop

3:49 pm - 8:32 am

STL

IND

15h 43m

1 stop

$156Multiple Airlines

Tue, Feb 24 - Tue, Mar 3

6:00 am - 6:51 am

IND

STL

25h 51m

2 stops

3:49 pm - 8:32 am

STL

IND

15h 43m

1 stop

$172Multiple Airlines

Tue, Feb 24 - Tue, Mar 3

7:27 pm - 6:51 am

IND

STL

12h 24m

1 stop

8:17 pm - 3:54 pm

STL

IND

18h 37m

2 stops

$173Frontier

Thu, Feb 26 - Sat, Feb 28

7:27 pm - 6:51 am

IND

STL

12h 24m

1 stop

12:36 pm - 8:32 am

STL

IND

18h 56m

1 stop

$192Multiple Airlines

Thu, Feb 26 - Sat, Feb 28

10:30 am - 6:45 pm

IND

STL

9h 15m

2 stops

11:35 am - 8:10 pm

STL

IND

7h 35m

2 stops

$265Southwest

Tue, Feb 24 - Tue, Mar 3

9:55 am - 5:15 pm

IND

STL

8h 20m

2 stops

2:50 pm - 11:35 pm

STL

IND

7h 45m

2 stops

$289Southwest

Thu, Feb 26 - Sat, Feb 28

12:21 pm - 10:27 pm

IND

STL

11h 06m

1 stop

3:49 pm - 8:32 am

STL

IND

15h 43m

1 stop

$290Multiple Airlines

Wed, Feb 11 - Sun, Feb 15

9:00 am - 2:42 pm

IND

STL

6h 42m

1 stop

7:00 pm - 11:26 pm

STL

IND

3h 26m

1 stop

$307United Airlines

Thu, Mar 12 - Sat, Mar 14

8:25 am - 2:37 pm

IND

STL

7h 12m

1 stop

5:30 pm - 12:34 am

STL

IND

6h 04m

1 stop

$317Delta

Thu, Jun 18 - Sun, Jun 21

Delta flights from Indianapolis to St. Louis

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

Delta

Jun 18

IND8:25 amIndianapolis

7h 12m

1 stop

STL2:37 pmLambert-St Louis

Jun 21

STL5:30 pmLambert-St Louis

6h 04m

1 stop

IND12:34 amIndianapolis

$317

Delta

Feb 9

IND6:55 pmIndianapolis

5h 42m

1 stop

STL11:37 pmLambert-St Louis

Feb 12

STL6:35 amLambert-St Louis

3h 53m

1 stop

IND11:28 amIndianapolis

$417

Delta

Mar 6

IND7:55 pmIndianapolis

4h 28m

1 stop

STL11:23 pmLambert-St Louis

Mar 15

STL6:32 amLambert-St Louis

3h 42m

1 stop

IND11:14 amIndianapolis

$438

Southwest flights from Indianapolis to St. Louis

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

Southwest

Feb 24

IND10:30 amIndianapolis

9h 15m

2 stops

STL6:45 pmLambert-St Louis

Mar 3

STL11:35 amLambert-St Louis

7h 35m

2 stops

IND8:10 pmIndianapolis

$265

Southwest

Feb 26

IND9:55 amIndianapolis

8h 20m

2 stops

STL5:15 pmLambert-St Louis

Feb 28

STL2:50 pmLambert-St Louis

7h 45m

2 stops

IND11:35 pmIndianapolis

$289

Southwest

Mar 29

IND5:50 pmIndianapolis

6h 30m

1 stop

STL11:20 pmLambert-St Louis

Apr 3

STL3:20 pmLambert-St Louis

0h 55m

IND5:15 pmIndianapolis

$374

Fly from

Fly to

Route

Depart

Return

Price

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Tue 2/24

9:13 pm-10:27 pm

1 stop26h 14m

Lambert-St Louis

Tue 3/3

3:49 pm-12:28 pm

1 stop19h 39m

$152

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Tue 2/24

9:13 pm-10:27 pm

1 stop26h 14m

Lambert-St Louis

Tue 3/3

3:49 pm-8:32 am

1 stop15h 43m

$156

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Tue 2/24

6:00 am-6:51 am

2 stops25h 51m

Lambert-St Louis

Tue 3/3

3:49 pm-8:32 am

1 stop15h 43m

$172

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Thu 2/26

7:27 pm-6:51 am

1 stop12h 24m

Lambert-St Louis

Sat 2/28

8:17 pm-3:54 pm

2 stops18h 37m

$173

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Thu 2/26

7:27 pm-6:51 am

1 stop12h 24m

Lambert-St Louis

Sat 2/28

12:36 pm-8:32 am

1 stop18h 56m

$192

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Tue 2/24

10:30 am-6:45 pm

2 stops9h 15m

Lambert-St Louis

Tue 3/3

11:35 am-8:10 pm

2 stops7h 35m

$265

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Thu 2/26

9:55 am-5:15 pm

2 stops8h 20m

Lambert-St Louis

Sat 2/28

2:50 pm-11:35 pm

2 stops7h 45m

$289

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Wed 2/11

12:21 pm-10:27 pm

1 stop11h 06m

Lambert-St Louis

Sun 2/15

3:49 pm-8:32 am

1 stop15h 43m

$290

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Thu 3/12

9:00 am-2:42 pm

1 stop6h 42m

Lambert-St Louis

Sat 3/14

7:00 pm-11:26 pm

1 stop3h 26m

$307

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Thu 6/18

8:25 am-2:37 pm

1 stop7h 12m

Lambert-St Louis

Sun 6/21

5:30 pm-12:34 am

1 stop6h 04m

$317

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.

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

As of January 2026, prices for Indianapolis to St. Louis flights are approximately 11% 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	6h 42m
Direct flights	None

The fastest flight from Indianapolis to St. Louis takes 6h 42m

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 6h 42m 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 January 2026, 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 11,201 reviews		Search American Airlines flights

St. Charles

Chesterfield

Hermann

Fairview Heights

Maryland Heights

Florissant

O'Fallon

Collinsville

Fenton

St. Peters

Wentzville

Alton

Farmington

Clayton

Edwardsville

Eureka

Festus

Glencoe

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.