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

Delta, United Airlines, and American Airlines 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 November 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.

$113 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

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

7:33 pm - 11:33 pmIND-STL

29h 00m1 stop

4:45 pm - 9:43 amSTL-IND

15h 58m1 stop

$162Multiple Airlines

Find Deal

Mon, Jan 26 - Thu, Jan 29

7:19 pm - 10:14 amIND-STL

15h 55m1 stop

10:47 am - 6:50 pmSTL-IND

7h 03m1 stop

$163Frontier

Find Deal

Thu, Dec 11 - Mon, Dec 15

7:19 pm - 10:14 amIND-STL

15h 55m1 stop

10:47 am - 6:50 pmSTL-IND

7h 03m1 stop

$183Frontier

Find Deal

Thu, Dec 11 - Mon, Dec 15

12:22 pm - 9:47 amIND-STL

22h 25m2 stops

10:47 am - 6:50 pmSTL-IND

7h 03m1 stop

$184Frontier

Find Deal

Sat, Dec 6 - Mon, Dec 8

7:19 pm - 10:14 amIND-STL

15h 55m1 stop

10:47 am - 7:43 amSTL-IND

19h 56m2 stops

$185Multiple Airlines

Find Deal

Thu, Dec 11 - Mon, Dec 15

12:22 pm - 10:33 pmIND-STL

11h 11m1 stop

10:47 am - 6:50 pmSTL-IND

7h 03m1 stop

$192Frontier

Find Deal

Sat, Dec 6 - Mon, Dec 8

12:03 pm - 10:33 pmIND-STL

11h 30m2 stops

10:47 am - 6:50 pmSTL-IND

7h 03m1 stop

$201Multiple Airlines

Find Deal

Thu, Dec 11 - Mon, Dec 15

8:00 am - 8:55 pmIND-STL

13h 55m1 stop

4:45 pm - 11:43 amSTL-IND

17h 58m2 stops

$225Multiple Airlines

Find Deal

Mon, Jan 26 - Thu, Jan 29

12:03 pm - 8:59 amIND-STL

21h 56m2 stops

10:47 am - 6:50 pmSTL-IND

7h 03m1 stop

$229Multiple Airlines

Find Deal

Thu, Dec 11 - Mon, Dec 15

1:37 pm - 5:50 pmIND-STL

5h 13m1 stop

5:25 pm - 10:30 pmSTL-IND

4h 05m1 stop

$235Delta

Find Deal

Thu, Jan 8 - Mon, Jan 12

Frontier flights from Indianapolis to St. Louis

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

Frontier

Dec 11

IND7:19 pmIndianapolis

15h 55m

1 stop

STL10:14 amLambert-St Louis

Dec 15

STL10:47 amLambert-St Louis

7h 03m

1 stop

IND6:50 pmIndianapolis

$163

Find similar

Frontier

Dec 11

IND7:19 pmIndianapolis

15h 55m

1 stop

STL10:14 amLambert-St Louis

Dec 15

STL10:47 amLambert-St Louis

7h 03m

1 stop

IND6:50 pmIndianapolis

$183

Find similar

Frontier

Dec 6

IND12:22 pmIndianapolis

22h 25m

2 stops

STL9:47 amLambert-St Louis

Dec 8

STL10:47 amLambert-St Louis

7h 03m

1 stop

IND6:50 pmIndianapolis

$184

Find similar

United Airlines flights from Indianapolis to St. Louis

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

United Airlines

Dec 3

IND11:15 amIndianapolis

6h 48m

1 stop

STL5:03 pmLambert-St Louis

Dec 7

STL1:00 pmLambert-St Louis

6h 00m

1 stop

IND8:00 pmIndianapolis

$337

Find similar

United Airlines

Dec 16

IND9:35 amIndianapolis

3h 40m

1 stop

STL12:15 pmLambert-St Louis

Dec 23

STL9:55 amLambert-St Louis

4h 27m

1 stop

IND3:22 pmIndianapolis

$347

Find similar

United Airlines

Dec 1

IND2:20 pmIndianapolis

4h 19m

1 stop

STL5:39 pmLambert-St Louis

Dec 4

STL5:27 pmLambert-St Louis

5h 11m

1 stop

IND11:38 pmIndianapolis

$471

Find similar

Fly from

Fly to

Route

Depart

Return

Price

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Mon 1/26

7:33 pm-11:33 pm

1 stop29h 00m

Lambert-St Louis

Thu 1/29

4:45 pm-9:43 am

1 stop15h 58m

$162

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Thu 12/11

7:19 pm-10:14 am

1 stop15h 55m

Lambert-St Louis

Mon 12/15

10:47 am-6:50 pm

1 stop7h 03m

$163

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Thu 12/11

7:19 pm-10:14 am

1 stop15h 55m

Lambert-St Louis

Mon 12/15

10:47 am-6:50 pm

1 stop7h 03m

$183

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Sat 12/6

12:22 pm-9:47 am

2 stops22h 25m

Lambert-St Louis

Mon 12/8

10:47 am-6:50 pm

1 stop7h 03m

$184

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Thu 12/11

7:19 pm-10:14 am

1 stop15h 55m

Lambert-St Louis

Mon 12/15

10:47 am-7:43 am

2 stops19h 56m

$185

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Sat 12/6

12:22 pm-10:33 pm

1 stop11h 11m

Lambert-St Louis

Mon 12/8

10:47 am-6:50 pm

1 stop7h 03m

$192

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Thu 12/11

12:03 pm-10:33 pm

2 stops11h 30m

Lambert-St Louis

Mon 12/15

10:47 am-6:50 pm

1 stop7h 03m

$201

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Mon 1/26

8:00 am-8:55 pm

1 stop13h 55m

Lambert-St Louis

Thu 1/29

4:45 pm-11:43 am

2 stops17h 58m

$225

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Thu 12/11

12:03 pm-8:59 am

2 stops21h 56m

Lambert-St Louis

Mon 12/15

10:47 am-6:50 pm

1 stop7h 03m

$229

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Thu 1/8

1:37 pm-5:50 pm

1 stop5h 13m

Lambert-St Louis

Mon 1/12

5:25 pm-10:30 pm

1 stop4h 05m

$235

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 17 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 November 2025, prices for Indianapolis to St. Louis flights are approximately 41% 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

Direct flights	None

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 40m 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 November 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 11,047 reviews		Search American Airlines flights
Delta	PriceFrom $266	Free Cancellation	Rating 7.9 8,002 reviews		Search Delta flights

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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.