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

How many flights depart from Indianapolis to St. Louis on average per week?

3 flights are operational weekly from Indianapolis to St. Louis as of January 2026. The most popular departure day for this route is Mon, with 33% of flights per week taking off on this day.

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 49% 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 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.

$79 Cheap Flights from Indianapolis to St. Louis in 2026

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.

12:38 pm - 6:51 am

IND

STL

19h 13m

1 stop

8:22 pm - 11:43 am

STL

IND

14h 21m

1 stop

$232Frontier

vie., ene. 30 - sáb., ene. 31

12:38 pm - 6:51 am

IND

STL

19h 13m

1 stop

8:22 pm - 11:26 am

STL

IND

38h 04m

2 stops

$243Multiple Airlines

jue., ene. 29 - lun., feb. 2

2:12 pm - 6:51 am

IND

STL

17h 39m

2 stops

8:22 pm - 11:43 am

STL

IND

14h 21m

1 stop

$255Multiple Airlines

vie., ene. 30 - sáb., ene. 31

10:20 am - 4:40 pm

IND

STL

7h 20m

1 stop

5:55 am - 12:50 pm

STL

IND

5h 55m

1 stop

$279Southwest

lun., feb. 9 - jue., feb. 12

7:45 pm - 9:45 pm

IND

STL

3h 00m

1 stop

12:50 pm - 9:15 pm

STL

IND

7h 25m

2 stops

$284Southwest

lun., feb. 9 - jue., feb. 12

5:05 am - 2:10 pm

IND

STL

10h 05m

2 stops

5:55 am - 12:50 pm

STL

IND

5h 55m

1 stop

$290Southwest

lun., feb. 9 - jue., feb. 12

5:05 am - 2:10 pm

IND

STL

10h 05m

2 stops

12:50 pm - 9:15 pm

STL

IND

7h 25m

2 stops

$295Southwest

lun., feb. 9 - jue., feb. 12

8:18 pm - 12:27 am

IND

STL

29h 09m

2 stops

3:49 pm - 8:32 am

STL

IND

15h 43m

1 stop

$309Multiple Airlines

jue., feb. 12 - jue., feb. 19

5:05 am - 2:10 pm

IND

STL

10h 05m

2 stops

5:50 am - 2:30 pm

STL

IND

7h 40m

2 stops

$314Southwest

lun., feb. 9 - jue., feb. 12

9:55 am - 5:15 pm

IND

STL

8h 20m

2 stops

2:55 pm - 11:05 pm

STL

IND

7h 10m

2 stops

$319Southwest

jue., feb. 12 - jue., feb. 19

Delta flights from Indianapolis to St. Louis

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

Delta

Feb 9

IND3:43 pmIndianapolis

6h 00m

1 stop

STL8:43 pmLambert-St Louis

Feb 12

STL6:00 amLambert-St Louis

5h 38m

1 stop

IND12:38 pmIndianapolis

$279

Delta

May 27

IND7:50 pmIndianapolis

4h 11m

1 stop

STL11:01 pmLambert-St Louis

Jun 24

STL6:45 amLambert-St Louis

5h 43m

1 stop

IND1:28 pmIndianapolis

$315

Delta

Jun 18

IND8:25 amIndianapolis

5h 29m

1 stop

STL12:54 pmLambert-St Louis

Jun 21

STL7:05 pmLambert-St Louis

4h 29m

1 stop

IND12:34 amIndianapolis

$317

United Airlines flights from Indianapolis to St. Louis

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

United Airlines

Mar 27

IND6:12 pmIndianapolis

3h 55m

1 stop

STL9:07 pmLambert-St Louis

Apr 3

STL11:15 amLambert-St Louis

6h 38m

1 stop

IND6:53 pmIndianapolis

$351

United Airlines

Apr 3

IND6:00 amIndianapolis

3h 35m

1 stop

STL8:35 amLambert-St Louis

Apr 5

STL7:45 amLambert-St Louis

6h 23m

1 stop

IND3:08 pmIndianapolis

$377

United Airlines

Jan 28

IND3:38 pmIndianapolis

6h 35m

1 stop

STL9:13 pmLambert-St Louis

Feb 1

STL8:05 amLambert-St Louis

4h 13m

1 stop

IND1:18 pmIndianapolis

$417

Fly from

Fly to

Route

Depart

Return

Price

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

vie. 1/30

12:38 pm-6:51 am

1 stop19h 13m

Lambert-St Louis

sáb. 1/31

8:22 pm-11:43 am

1 stop14h 21m

$232

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

jue. 1/29

12:38 pm-6:51 am

1 stop19h 13m

Lambert-St Louis

lun. 2/2

8:22 pm-11:26 am

2 stops38h 04m

$243

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

vie. 1/30

2:12 pm-6:51 am

2 stops17h 39m

Lambert-St Louis

sáb. 1/31

8:22 pm-11:43 am

1 stop14h 21m

$255

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

lun. 2/9

10:20 am-4:40 pm

1 stop7h 20m

Lambert-St Louis

jue. 2/12

5:55 am-12:50 pm

1 stop5h 55m

$279

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

lun. 2/9

7:45 pm-9:45 pm

1 stop3h 00m

Lambert-St Louis

jue. 2/12

12:50 pm-9:15 pm

2 stops7h 25m

$284

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

lun. 2/9

5:05 am-2:10 pm

2 stops10h 05m

Lambert-St Louis

jue. 2/12

5:55 am-12:50 pm

1 stop5h 55m

$290

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

lun. 2/9

5:05 am-2:10 pm

2 stops10h 05m

Lambert-St Louis

jue. 2/12

12:50 pm-9:15 pm

2 stops7h 25m

$295

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

jue. 2/12

8:18 pm-12:27 am

2 stops29h 09m

Lambert-St Louis

jue. 2/19

3:49 pm-8:32 am

1 stop15h 43m

$309

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

lun. 2/9

5:05 am-2:10 pm

2 stops10h 05m

Lambert-St Louis

jue. 2/12

5:50 am-2:30 pm

2 stops7h 40m

$314

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

jue. 2/12

9:55 am-5:15 pm

2 stops8h 20m

Lambert-St Louis

jue. 2/19

2:55 pm-11:05 pm

2 stops7h 10m

$319

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

Other information

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	3h 35m
Direct flights	None

The fastest flight from Indianapolis to St. Louis takes 3h 35m

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 35m 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 11,129 reviews		Search American Airlines flights

St. Charles

Chesterfield

Hermann

Fairview Heights

Florissant

Maryland Heights

O'Fallon

Fenton

Collinsville

St. Peters

Wentzville

Alton

Farmington

Clayton

Eureka

Edwardsville

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.