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 and American Airlines 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

1 adult

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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 - 10:33 pm

IND

STL

9h 21m1 stop

5:11 pm - 10:48 pm

STL

IND

28h 37m2 stops

$182Multiple Airlines

Thu, Jan 8 - Mon, Jan 12

10:38 am - 10:33 pm

IND

STL

12h 55m1 stop

5:11 pm - 6:23 pm

STL

IND

24h 12m1 stop

$188Multiple Airlines

Thu, Jan 8 - Mon, Jan 12

6:10 pm - 11:59 pm

IND

STL

6h 49m1 stop

10:11 pm - 5:47 pm

STL

IND

18h 36m1 stop

$211Multiple Airlines

Mon, Feb 23 - Thu, Feb 26

6:10 pm - 11:59 pm

IND

STL

6h 49m1 stop

10:11 pm - 7:47 pm

STL

IND

20h 36m2 stops

$230Frontier

Mon, Feb 23 - Thu, Feb 26

7:51 pm - 11:25 pm

IND

STL

4h 34m1 stop

9:59 am - 5:50 pm

STL

IND

6h 51m1 stop

$287Delta

Wed, Jan 21 - Fri, Jan 23

12:25 pm - 10:40 pm

IND

STL

11h 15m2 stops

10:35 am - 10:25 pm

STL

IND

10h 50m2 stops

$314Southwest

Mon, Feb 23 - Thu, Feb 26

7:15 am - 12:29 pm

IND

STL

6h 14m1 stop

3:11 pm - 10:14 pm

STL

IND

6h 03m1 stop

$328United Airlines

Wed, Jan 28 - Mon, Feb 2

6:34 pm - 11:59 pm

IND

STL

6h 25m1 stop

8:30 am - 2:46 pm

STL

IND

5h 16m1 stop

$339United Airlines

Thu, Jan 22 - Mon, Jan 26

12:38 pm - 10:56 am

IND

STL

23h 18m1 stop

7:43 pm - 9:43 am

STL

IND

13h 00m2 stops

$346Multiple Airlines

Mon, Jan 5 - Fri, Jan 9

5:06 pm - 9:45 am

IND

STL

17h 39m1 stop

3:43 pm - 12:46 pm

STL

IND

20h 03m2 stops

$356Frontier

Sun, Jan 4 - Thu, Jan 8

Delta flights from Indianapolis to St. Louis

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

Delta

Jan 21

IND7:51 pmIndianapolis

4h 34m

1 stop

STL11:25 pmLambert-St Louis

Jan 23

STL9:59 amLambert-St Louis

6h 51m

1 stop

IND5:50 pmIndianapolis

$287

Find similar

Delta

Mar 18

IND12:25 pmIndianapolis

5h 07m

1 stop

STL4:32 pmLambert-St Louis

Mar 20

STL5:25 pmLambert-St Louis

5h 22m

1 stop

IND11:47 pmIndianapolis

$317

Find similar

Delta

Dec 25

IND5:45 pmIndianapolis

3h 56m

1 stop

STL8:41 pmLambert-St Louis

Dec 30

STL6:00 amLambert-St Louis

4h 41m

1 stop

IND11:41 amIndianapolis

$636

Find similar

Southwest flights from Indianapolis to St. Louis

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

Southwest

Jan 21

IND7:00 amIndianapolis

6h 45m

2 stops

STL12:45 pmLambert-St Louis

Jan 28

STL10:15 amLambert-St Louis

6h 45m

2 stops

IND6:00 pmIndianapolis

$278

Find similar

Southwest

Feb 23

IND12:25 pmIndianapolis

11h 15m

2 stops

STL10:40 pmLambert-St Louis

Feb 26

STL10:35 amLambert-St Louis

10h 50m

2 stops

IND10:25 pmIndianapolis

$314

Find similar

Southwest

Mar 19

IND6:40 amIndianapolis

3h 20m

1 stop

STL9:00 amLambert-St Louis

Mar 19

STL4:45 pmLambert-St Louis

5h 45m

1 stop

IND11:30 pmIndianapolis

$327

Find similar

Fly from

Fly to

Route

Depart

Return

Price

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Thu 1/8

2:12 pm-10:33 pm

1 stop9h 21m

Lambert-St Louis

Mon 1/12

5:11 pm-10:48 pm

2 stops28h 37m

$182

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Thu 1/8

10:38 am-10:33 pm

1 stop12h 55m

Lambert-St Louis

Mon 1/12

5:11 pm-6:23 pm

1 stop24h 12m

$188

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Mon 2/23

6:10 pm-11:59 pm

1 stop6h 49m

Lambert-St Louis

Thu 2/26

10:11 pm-5:47 pm

1 stop18h 36m

$211

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Mon 2/23

6:10 pm-11:59 pm

1 stop6h 49m

Lambert-St Louis

Thu 2/26

10:11 pm-7:47 pm

2 stops20h 36m

$230

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Wed 1/21

7:51 pm-11:25 pm

1 stop4h 34m

Lambert-St Louis

Fri 1/23

9:59 am-5:50 pm

1 stop6h 51m

$287

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Mon 2/23

12:25 pm-10:40 pm

2 stops11h 15m

Lambert-St Louis

Thu 2/26

10:35 am-10:25 pm

2 stops10h 50m

$314

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Wed 1/28

7:15 am-12:29 pm

1 stop6h 14m

Lambert-St Louis

Mon 2/2

3:11 pm-10:14 pm

1 stop6h 03m

$328

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Thu 1/22

6:34 pm-11:59 pm

1 stop6h 25m

Lambert-St Louis

Mon 1/26

8:30 am-2:46 pm

1 stop5h 16m

$339

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Mon 1/5

12:38 pm-10:56 am

1 stop23h 18m

Lambert-St Louis

Fri 1/9

7:43 pm-9:43 am

2 stops13h 00m

$346

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Sun 1/4

5:06 pm-9:45 am

1 stop17h 39m

Lambert-St Louis

Thu 1/8

3:43 pm-12:46 pm

2 stops20h 03m

$356

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	4h 11m
Direct flights	None

The fastest flight from Indianapolis to St. Louis takes 4h 11m

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 4h 11m 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 11,054 reviews		Search American Airlines flights

St. Charles

Chesterfield

Hermann

Fairview Heights

Maryland Heights

O'Fallon

Florissant

Fenton

St. Peters

Wentzville

Collinsville

Alton

Farmington

Clayton

Festus

Glencoe

Eureka

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.