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

American Airlines and Southwest are the most popular carriers operating from Indianapolis to Lambert-St Louis

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.

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.

$98 Cheap Flights from Indianapolis to St. Louis in 2025/26

1 adult

0 bags

Discover deals from 900+ travel sites with momondo.

Save money when you book flights with momondo

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Not ready to book? to track prices.

Search flight deals

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.

5:15 am - 10:33 pm

IND

STL

18h 18m1 stop

5:11 pm - 9:43 am

STL

IND

15h 32m1 stop

$166Multiple Airlines

Tue, Jan 6 - Wed, Jan 7

2:12 pm - 11:33 pm

IND

STL

10h 21m1 stop

10:16 am - 6:38 pm

STL

IND

7h 22m1 stop

$180Multiple Airlines

Thu, Jan 22 - Mon, Jan 26

2:12 pm - 11:33 pm

IND

STL

10h 21m1 stop

8:22 pm - 6:23 pm

STL

IND

21h 01m2 stops

$185Multiple Airlines

Thu, Jan 22 - Mon, Jan 26

5:15 am - 10:33 pm

IND

STL

18h 18m1 stop

7:43 pm - 1:15 pm

STL

IND

16h 32m2 stops

$189Multiple Airlines

Tue, Jan 6 - Wed, Jan 7

3:12 pm - 10:27 pm

IND

STL

8h 15m1 stop

1:59 pm - 8:47 pm

STL

IND

29h 48m2 stops

$210Multiple Airlines

Tue, Feb 24 - Fri, Feb 27

3:12 pm - 10:27 pm

IND

STL

8h 15m1 stop

3:49 pm - 12:40 pm

STL

IND

19h 51m1 stop

$247Multiple Airlines

Tue, Feb 24 - Fri, Feb 27

7:01 am - 10:20 am

IND

STL

4h 19m1 stop

3:54 pm - 11:27 pm

STL

IND

6h 33m1 stop

$257American Airlines

Wed, Jan 14 - Wed, Jan 14

5:15 am - 10:33 pm

IND

STL

18h 18m1 stop

5:42 pm - 9:43 am

STL

IND

15h 01m1 stop

$263Multiple Airlines

Tue, Jan 6 - Thu, Jan 29

7:00 am - 11:15 am

IND

STL

5h 15m1 stop

2:15 pm - 10:05 pm

STL

IND

6h 50m2 stops

$273Southwest

Tue, Jan 6 - Thu, Jan 29

10:30 am - 6:45 pm

IND

STL

9h 15m2 stops

2:15 pm - 10:05 pm

STL

IND

6h 50m2 stops

$278Southwest

Tue, Jan 6 - Thu, Jan 29

United Airlines flights from Indianapolis to St. Louis

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

United Airlines

Jan 8

IND7:15 amIndianapolis

4h 47m

1 stop

STL11:02 amLambert-St Louis

Jan 12

STL6:40 pmLambert-St Louis

3h 50m

1 stop

IND11:30 pmIndianapolis

$331

Find similar

United Airlines

Jan 5

IND7:45 pmIndianapolis

3h 58m

1 stop

STL10:43 pmLambert-St Louis

Jan 6

STL9:57 amLambert-St Louis

5h 40m

1 stop

IND4:37 pmIndianapolis

$334

Find similar

United Airlines

Jan 8

IND9:05 amIndianapolis

4h 24m

1 stop

STL12:29 pmLambert-St Louis

Jan 12

STL6:40 pmLambert-St Louis

3h 50m

1 stop

IND11:30 pmIndianapolis

$339

Find similar

Southwest flights from Indianapolis to St. Louis

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

Southwest

Jan 14

IND11:25 amIndianapolis

8h 20m

2 stops

STL6:45 pmLambert-St Louis

Jan 15

STL7:50 amLambert-St Louis

4h 20m

1 stop

IND1:10 pmIndianapolis

$266

Find similar

Southwest

Jan 14

IND5:35 amIndianapolis

8h 10m

2 stops

STL12:45 pmLambert-St Louis

Jan 15

STL2:55 pmLambert-St Louis

7h 10m

2 stops

IND11:05 pmIndianapolis

$271

Find similar

Southwest

Jan 6

IND7:00 amIndianapolis

5h 15m

1 stop

STL11:15 amLambert-St Louis

Jan 29

STL2:15 pmLambert-St Louis

6h 50m

2 stops

IND10:05 pmIndianapolis

$273

Find similar

Fly from

Fly to

Route

Depart

Return

Price

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Tue 1/6

5:15 am-10:33 pm

1 stop18h 18m

Lambert-St Louis

Wed 1/7

5:11 pm-9:43 am

1 stop15h 32m

$166

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Thu 1/22

2:12 pm-11:33 pm

1 stop10h 21m

Lambert-St Louis

Mon 1/26

10:16 am-6:38 pm

1 stop7h 22m

$180

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Thu 1/22

2:12 pm-11:33 pm

1 stop10h 21m

Lambert-St Louis

Mon 1/26

8:22 pm-6:23 pm

2 stops21h 01m

$185

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Tue 1/6

5:15 am-10:33 pm

1 stop18h 18m

Lambert-St Louis

Wed 1/7

7:43 pm-1:15 pm

2 stops16h 32m

$189

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Tue 2/24

3:12 pm-10:27 pm

1 stop8h 15m

Lambert-St Louis

Fri 2/27

1:59 pm-8:47 pm

2 stops29h 48m

$210

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Tue 2/24

3:12 pm-10:27 pm

1 stop8h 15m

Lambert-St Louis

Fri 2/27

3:49 pm-12:40 pm

1 stop19h 51m

$247

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Wed 1/14

7:01 am-10:20 am

1 stop4h 19m

Lambert-St Louis

Wed 1/14

3:54 pm-11:27 pm

1 stop6h 33m

$257

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Tue 1/6

5:15 am-10:33 pm

1 stop18h 18m

Lambert-St Louis

Thu 1/29

5:42 pm-9:43 am

1 stop15h 01m

$263

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Tue 1/6

7:00 am-11:15 am

1 stop5h 15m

Lambert-St Louis

Thu 1/29

2:15 pm-10:05 pm

2 stops6h 50m

$273

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Tue 1/6

10:30 am-6:45 pm

2 stops9h 15m

Lambert-St Louis

Thu 1/29

2:15 pm-10:05 pm

2 stops6h 50m

$278

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 19 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	3h 58m
Direct flights	None

The fastest flight from Indianapolis to St. Louis takes 3h 58m

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 3h 58m 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 11,049 reviews		Search American Airlines flights

St. Charles

Chesterfield

Hermann

Fairview Heights

Maryland Heights

O'Fallon

Florissant

Fenton

Wentzville

St. Peters

Collinsville

Alton

Clayton

Festus

Glencoe

Farmington

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.