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

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

What airlines fly to Indianapolis?

American Airlines, Delta and United Airlines are the top three most popular airlines that fly to Indianapolis from St. Louis according to our data. American Airlines is the first choice among our users, with 63% of people opting to fly with this airline when traveling to Indianapolis. Keep in mind that there are 5 different airlines that fly to Indianapolis on a routine basis, so you have a few additional options to choose from.

When did momondo last update prices for flights from Lambert-St Louis Airport to Indianapolis Airport?

Prices for flights from Lambert-St Louis Airport to Indianapolis Airport are refreshed on a daily basis.

How many operators does momondo search for flights from Lambert-St Louis Airport to Indianapolis Airport?

The number of operators available for flights from Lambert-St Louis Airport to Indianapolis Airport is 3 as of July 2025.

How old do you have to be to fly from Lambert-St Louis Airport to Indianapolis Airport?

Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Lambert-St Louis Airport to Indianapolis Airport.

What documentation or ID do you need to fly to Indianapolis Airport?

The travel and health documents required for your trip to Indianapolis Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Indianapolis Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

$99 Cheap Flights from St. Louis to Indianapolis in 2025

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Find the cheapest flights from St. Louis to Indianapolis

Round-trip

One-way

Last minute

Cheap round-trip flights

6:33 am - 1:07 pmSTL-IND

5h 34m1 stop

12:14 pm - 3:44 pmIND-STL

4h 30m1 stop

$197United Airlines

Find Deal

Tue, Aug 12 - Tue, Aug 19

3:55 pm - 11:45 pmSTL-IND

6h 50m1 stop

7:35 am - 1:35 pmIND-STL

7h 00m2 stops

$202Southwest

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Thu, Aug 14 - Thu, Aug 21

3:43 pm - 11:25 pmSTL-IND

6h 42m1 stop

6:05 am - 9:29 amIND-STL

4h 24m1 stop

$214American Airlines

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Wed, Aug 6 - Fri, Aug 8

6:10 am - 10:20 amSTL-IND

3h 10m1 stop

4:07 pm - 8:32 pmIND-STL

5h 25m1 stop

$231American Airlines

Find Deal

Fri, Sep 5 - Fri, Sep 5

2:30 pm - 12:53 pmSTL-IND

21h 23m2 stops

7:50 pm - 1:32 pmIND-STL

18h 42m2 stops

$273Spirit Airlines

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Thu, Aug 14 - Thu, Aug 21

7:29 pm - 12:15 pmSTL-IND

15h 46m1 stop

1:00 pm - 9:11 amIND-STL

21h 11m1 stop

$281Frontier

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Sat, Jul 26 - Thu, Jul 31

2:30 pm - 12:53 pmSTL-IND

21h 23m2 stops

12:25 pm - 1:32 pmIND-STL

26h 07m3 stops

$303Spirit Airlines

Find Deal

Thu, Aug 14 - Thu, Aug 21

5:26 pm - 11:30 amSTL-IND

17h 04m1 stop

6:15 am - 12:10 pmIND-STL

30h 55m3 stops

$319

Find Deal

Tue, Aug 12 - Tue, Aug 19

5:26 pm - 3:24 pmSTL-IND

20h 58m2 stops

6:00 am - 2:39 pmIND-STL

9h 39m1 stop

$333

Find Deal

Tue, Jul 29 - Sat, Aug 2

7:29 pm - 11:11 amSTL-IND

14h 42m2 stops

6:48 pm - 11:47 pmIND-STL

5h 59m1 stop

$337Frontier

Find Deal

Fri, Aug 1 - Sun, Aug 3

United Airlines flights from St. Louis to Indianapolis

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

United Airlines

Aug 12

STL6:33 amLambert-St Louis

5h 34m

1 stop

IND1:07 pmIndianapolis

Aug 19

IND12:14 pmIndianapolis

4h 30m

1 stop

STL3:44 pmLambert-St Louis

$197

Find similar

United Airlines

Jul 29

STL8:00 amLambert-St Louis

4h 07m

1 stop

IND1:07 pmIndianapolis

Aug 2

IND1:50 pmIndianapolis

6h 41m

1 stop

STL7:31 pmLambert-St Louis

$377

Find similar

United Airlines

Jul 22

STL11:25 amLambert-St Louis

5h 28m

1 stop

IND5:53 pmIndianapolis

Aug 19

IND12:14 pmIndianapolis

4h 30m

1 stop

STL3:44 pmLambert-St Louis

$397

Find similar

Southwest flights from St. Louis to Indianapolis

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

Southwest

Aug 14

STL3:55 pmLambert-St Louis

6h 50m

1 stop

IND11:45 pmIndianapolis

Aug 21

IND7:35 amIndianapolis

7h 00m

2 stops

STL1:35 pmLambert-St Louis

$202

Find similar

Southwest

Aug 6

STL2:25 pmLambert-St Louis

7h 00m

2 stops

IND10:25 pmIndianapolis

Aug 8

IND3:40 pmIndianapolis

5h 25m

1 stop

STL8:05 pmLambert-St Louis

$219

Find similar

Southwest

Sep 5

STL1:10 pmLambert-St Louis

8h 15m

2 stops

IND10:25 pmIndianapolis

Sep 6

IND7:05 amIndianapolis

8h 40m

2 stops

STL2:45 pmLambert-St Louis

$224

Find similar

How to get the cheapest flight ticket from St. Louis to Indianapolis

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 Indianapolis?

In general, April is the cheapest month to fly from St. Louis to Indianapolis. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $226. If you are unable to visit Indianapolis during the month of April, then departing from St. Louis during the month December is also very affordable. Most momondo users find prices during this month for around $256.

What is the cheapest day to depart on your flight to Indianapolis?

Our data shows that Thursday is the least expensive day to fly to Indianapolis. Tickets to fly out on this day can be as low as $1,178. Be sure to avoid booking your departure on a Friday as prices are generally higher than usual. According to our data, the average ticket price to Indianapolis on Friday is $1,331.

What is the cheapest time of day to depart on your flight to Indianapolis?

Flying to Indianapolis from St. Louis at noon is the least expensive time of day to depart. momondo users have found prices as low as $256 when looking at flights departing at noon. If you have a flexible travel schedule, then try to avoid flying in the morning when prices are $1,297 on average. Flights to Indianapolis from St. Louis in the morning are generally more expensive because this time of day is more convenient for travelers’ schedules.

How have St. Louis to Indianapolis flight prices changed over time?

As of July 2025, prices for St. Louis to Indianapolis flights are approximately 2% cheaper when compared to flights at the same time last year.

When to book flights from St. Louis to Indianapolis

Are you open to changing your travel dates? Check out the ideal times to fly from St. Louis to Indianapolis according to our flight data. Find out which month and days have the cheapest flights.

Estimated round-trip price

Cheap St. Louis to Indianapolis (STL to IND) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from St. Louis to Indianapolis

Best Price Found	$99
Fastest flight time	3h 10m
Direct flights	None
Airports in Indianapolis	1 airport

The best one-way flight to Indianapolis from St. Louis in the past 72 hours is $99. The best round-trip flight deal from St. Louis to Indianapolis found on momondo in the last 72 hours is $197.

The fastest flight from St. Louis to Indianapolis takes 3h 10m

There are no direct flights from St. Louis to Indianapolis. Popular non-direct route for this connection is Lambert-St Louis Airport - Indianapolis Airport.

There is 1 airport near Indianapolis: Indianapolis (IND)

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How far is Lambert-St Louis to Indianapolis by plane?
A flight from Lambert-St Louis to Indianapolis will travel around 230.0 mi. Flights usually cover this in 3h 10m, depending on flying conditions and air traffic around both airports.
When did momondo last update prices for flights from Lambert-St Louis Airport to Indianapolis Airport?
Prices for flights from Lambert-St Louis Airport to Indianapolis Airport are refreshed on a daily basis.
How many operators does momondo search for flights from Lambert-St Louis Airport to Indianapolis Airport?
The number of operators available for flights from Lambert-St Louis Airport to Indianapolis Airport is 3 as of July 2025.
How old do you have to be to fly from Lambert-St Louis Airport to Indianapolis Airport?
Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Lambert-St Louis Airport to Indianapolis Airport.
What documentation or ID do you need to fly to Indianapolis Airport?
The travel and health documents required for your trip to Indianapolis Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Indianapolis Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.
What is the most popular airline from St. Louis to Indianapolis?
Based on momondo bookings for flights between St. Louis and Indianapolis, the leading airline is American Airlines, making up 53% of the total bookings. Other popular airlines include Delta with 28% and United Airlines with 19%.

Best airlines flying from St. Louis to Indianapolis

Compare and see reviews for airlines that fly from St. Louis to Indianapolis with momondo

Airline	Rating	Free Cancellation	Price
Delta	PriceFrom $216	Free Cancellation	Rating 8.0 7,959 reviews	Search Delta flights
American Airlines	PriceFrom $226	Free Cancellation	Rating 7.2 10,000 reviews	Search American Airlines flights
United Airlines	PriceFrom $234	Free Cancellation	Rating 7.4 8,863 reviews	Search United Airlines flights

Terre Haute

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Kokomo

Anderson

Muncie

Greenwood

Plainfield

Fishers

Noblesville

Carmel

West Lafayette

Seymour

Shelbyville

Franklin

Crawfordsville

Brownsburg

Greenfield

Speedway

Westfield

Mooresville

Why use momondo?

Why should I use momondo to find a flight deal from St. Louis to Indianapolis?

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from St. Louis to Indianapolis for you.

Can I find flights from St. Louis to Indianapolis with flexible booking policies on momondo?

Flights from St. Louis to Indianapolis with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

How can momondo help me find flights from St. Louis to Indianapolis?

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Indianapolis from St. Louis.

I’m not ready to book a flight from St. Louis to Indianapolis right now. Can momondo alert me if prices change?

Price alerts on flights to Indianapolis from St. Louis are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.