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?

American Airlines, Frontier, and Delta 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 October 2025, there are 2 operators 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.

$119 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.

8:59 pm - 3:38 pmIND-STL

19h 39m1 stop

7:45 pm - 8:04 pmSTL-IND

23h 19m2 stops

$222Multiple Airlines

Find Deal

Fri, Nov 14 - Tue, Nov 18

9:03 am - 11:57 pmIND-STL

15h 54m1 stop

12:04 pm - 3:10 pmSTL-IND

26h 06m1 stop

$227Multiple Airlines

Find Deal

Thu, Nov 27 - Thu, Dec 4

3:34 pm - 9:07 amIND-STL

18h 33m2 stops

4:13 pm - 8:47 amSTL-IND

15h 34m1 stop

$237Frontier

Find Deal

Mon, Nov 17 - Thu, Nov 20

7:26 pm - 3:08 pmIND-STL

20h 42m2 stops

12:04 pm - 3:10 pmSTL-IND

26h 06m1 stop

$242Frontier

Find Deal

Thu, Nov 27 - Thu, Dec 4

5:34 pm - 11:42 pmIND-STL

7h 08m1 stop

12:49 pm - 7:00 pmSTL-IND

5h 11m1 stop

$257Delta

Find Deal

Mon, Dec 8 - Tue, Dec 9

6:20 pm - 10:00 pmIND-STL

4h 40m1 stop

1:20 pm - 10:35 pmSTL-IND

8h 15m2 stops

$262Southwest

Find Deal

Mon, Dec 8 - Tue, Dec 9

8:10 am - 1:17 pmIND-STL

6h 07m1 stop

3:43 pm - 8:50 pmSTL-IND

4h 07m1 stop

$287American Airlines

Find Deal

Fri, Nov 21 - Mon, Nov 24

5:55 am - 12:10 pmIND-STL

7h 15m1 stop

8:25 am - 5:00 pmSTL-IND

7h 35m2 stops

$292Southwest

Find Deal

Sun, Dec 7 - Mon, Dec 8

8:10 am - 1:17 pmIND-STL

6h 07m1 stop

7:12 am - 1:13 pmSTL-IND

5h 01m1 stop

$297American Airlines

Find Deal

Thu, Nov 27 - Thu, Dec 4

10:04 am - 3:01 pmIND-STL

5h 57m1 stop

5:45 pm - 12:04 amSTL-IND

5h 19m1 stop

$317Delta

Find Deal

Tue, Mar 10 - Wed, Mar 11

Frontier flights from Indianapolis to St. Louis

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

Frontier

Nov 17

IND3:34 pmIndianapolis

18h 33m

2 stops

STL9:07 amLambert-St Louis

Nov 20

STL4:13 pmLambert-St Louis

15h 34m

1 stop

IND8:47 amIndianapolis

$237

Find similar

Frontier

Nov 27

IND7:26 pmIndianapolis

20h 42m

2 stops

STL3:08 pmLambert-St Louis

Dec 4

STL12:04 pmLambert-St Louis

26h 06m

1 stop

IND3:10 pmIndianapolis

$242

Find similar

Frontier

Nov 17

IND7:39 pmIndianapolis

14h 28m

1 stop

STL9:07 amLambert-St Louis

Nov 20

STL4:13 pmLambert-St Louis

15h 34m

1 stop

IND8:47 amIndianapolis

$269

Find similar

Delta flights from Indianapolis to St. Louis

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

Delta

Dec 8

IND5:34 pmIndianapolis

7h 08m

1 stop

STL11:42 pmLambert-St Louis

Dec 9

STL12:49 pmLambert-St Louis

5h 11m

1 stop

IND7:00 pmIndianapolis

$257

Find similar

Delta

Mar 10

IND10:04 amIndianapolis

5h 57m

1 stop

STL3:01 pmLambert-St Louis

Mar 11

STL5:45 pmLambert-St Louis

5h 19m

1 stop

IND12:04 amIndianapolis

$317

Find similar

Delta

Nov 14

IND7:57 pmIndianapolis

4h 47m

1 stop

STL11:44 pmLambert-St Louis

Nov 18

STL5:34 pmLambert-St Louis

5h 10m

1 stop

IND11:44 pmIndianapolis

$417

Find similar

Fly from

Fly to

Route

Depart

Return

Price

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Fri 11/14

8:59 pm-3:38 pm

1 stop19h 39m

Lambert-St Louis

Tue 11/18

7:45 pm-8:04 pm

2 stops23h 19m

$222

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Thu 11/27

9:03 am-11:57 pm

1 stop15h 54m

Lambert-St Louis

Thu 12/4

12:04 pm-3:10 pm

1 stop26h 06m

$227

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Mon 11/17

3:34 pm-9:07 am

2 stops18h 33m

Lambert-St Louis

Thu 11/20

4:13 pm-8:47 am

1 stop15h 34m

$237

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Thu 11/27

7:26 pm-3:08 pm

2 stops20h 42m

Lambert-St Louis

Thu 12/4

12:04 pm-3:10 pm

1 stop26h 06m

$242

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Mon 12/8

5:34 pm-11:42 pm

1 stop7h 08m

Lambert-St Louis

Tue 12/9

12:49 pm-7:00 pm

1 stop5h 11m

$257

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Mon 12/8

6:20 pm-10:00 pm

1 stop4h 40m

Lambert-St Louis

Tue 12/9

1:20 pm-10:35 pm

2 stops8h 15m

$262

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Fri 11/21

8:10 am-1:17 pm

1 stop6h 07m

Lambert-St Louis

Mon 11/24

3:43 pm-8:50 pm

1 stop4h 07m

$287

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Sun 12/7

5:55 am-12:10 pm

1 stop7h 15m

Lambert-St Louis

Mon 12/8

8:25 am-5:00 pm

2 stops7h 35m

$292

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Thu 11/27

8:10 am-1:17 pm

1 stop6h 07m

Lambert-St Louis

Thu 12/4

7:12 am-1:13 pm

1 stop5h 01m

$297

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Tue 3/10

10:04 am-3:01 pm

1 stop5h 57m

Lambert-St Louis

Wed 3/11

5:45 pm-12:04 am

1 stop5h 19m

$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 $266. 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 October 2025, prices for Indianapolis to St. Louis flights are approximately 203% more expensive 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

Direct flights	None

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

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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 17m 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 October 2025, there are 2 operators 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 63% of all bookings. The subsequent popular airline is Delta at 37%.

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 11,035 reviews		Search American Airlines flights
Delta	PriceFrom $266	Free Cancellation	Rating 7.9 7,998 reviews		Search Delta flights

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O'Fallon

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St. Peters

Alton

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Glencoe

Edwardsville

Clayton

Eureka

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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.