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

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

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 1 as of January 2026.

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.

$126 Cheap Flights from St. Louis to Indianapolis in 2026

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Find the cheapest flights from St. Louis to Indianapolis

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

8:16 pm - 7:32 pm

STL

IND

22h 16m

1 stop

8:33 pm - 9:48 am

IND

STL

14h 15m

1 stop

$222Frontier

Sat, Apr 4 - Tue, Apr 7

8:22 pm - 1:15 pm

STL

IND

15h 53m

2 stops

12:38 pm - 6:51 am

IND

STL

19h 13m

1 stop

$236Multiple Airlines

Wed, Feb 4 - Sun, Feb 8

8:17 pm - 6:31 pm

STL

IND

21h 14m

1 stop

9:28 am - 11:19 pm

IND

STL

14h 51m

1 stop

$252Multiple Airlines

Wed, Mar 4 - Wed, Mar 11

8:22 pm - 11:43 am

STL

IND

14h 21m

1 stop

12:38 pm - 6:51 am

IND

STL

19h 13m

1 stop

$255Frontier

Wed, Feb 4 - Sun, Feb 8

8:17 pm - 6:31 pm

STL

IND

21h 14m

1 stop

8:33 pm - 11:19 pm

IND

STL

27h 46m

2 stops

$272Frontier

Wed, Mar 4 - Wed, Mar 11

8:22 pm - 9:43 am

STL

IND

36h 21m

2 stops

12:38 pm - 6:51 am

IND

STL

19h 13m

1 stop

$279Multiple Airlines

Mon, Feb 2 - Fri, Feb 6

7:50 am - 5:45 pm

STL

IND

8h 55m

2 stops

7:45 pm - 9:45 pm

IND

STL

3h 00m

1 stop

$284Southwest

Mon, Feb 9 - Mon, Feb 9

11:32 am - 11:16 am

STL

IND

22h 44m

1 stop

5:08 pm - 10:31 am

IND

STL

18h 23m

2 stops

$290Multiple Airlines

Wed, Mar 18 - Mon, Mar 23

11:32 am - 11:16 am

STL

IND

22h 44m

1 stop

7:18 pm - 11:19 pm

IND

STL

29h 01m

1 stop

$297Frontier

Wed, Mar 18 - Mon, Mar 23

1:39 pm - 9:10 pm

STL

IND

6h 31m

1 stop

7:59 pm - 11:25 pm

IND

STL

4h 26m

1 stop

$298Delta

Wed, Mar 18 - Fri, Mar 27

Frontier flights from St. Louis to Indianapolis

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

Frontier

Apr 4

STL8:16 pmLambert-St Louis

22h 16m

1 stop

IND7:32 pmIndianapolis

Apr 7

IND8:33 pmIndianapolis

14h 15m

1 stop

STL9:48 amLambert-St Louis

$222

Frontier

Feb 4

STL8:22 pmLambert-St Louis

14h 21m

1 stop

IND11:43 amIndianapolis

Feb 8

IND12:38 pmIndianapolis

19h 13m

1 stop

STL6:51 amLambert-St Louis

$255

Frontier

Mar 4

STL8:17 pmLambert-St Louis

21h 14m

1 stop

IND6:31 pmIndianapolis

Mar 11

IND8:33 pmIndianapolis

27h 46m

2 stops

STL11:19 pmLambert-St Louis

$272

Delta flights from St. Louis to Indianapolis

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

Delta

Mar 18

STL1:39 pmLambert-St Louis

6h 31m

1 stop

IND9:10 pmIndianapolis

Mar 27

IND7:59 pmIndianapolis

4h 26m

1 stop

STL11:25 pmLambert-St Louis

$298

Delta

Feb 20

STL5:50 pmLambert-St Louis

5h 17m

1 stop

IND12:07 amIndianapolis

Feb 22

IND7:00 amIndianapolis

4h 43m

1 stop

STL10:43 amLambert-St Louis

$317

Delta

Mar 20

STL5:25 pmLambert-St Louis

5h 22m

1 stop

IND11:47 pmIndianapolis

Mar 23

IND12:25 pmIndianapolis

5h 07m

1 stop

STL4:32 pmLambert-St Louis

$336

Fly from

Fly to

Route

Depart

Return

Price

St. LouisIndianapolis

STL - IND

STLIND

Lambert-St Louis

Sat 4/4

8:16 pm-7:32 pm

1 stop22h 16m

Indianapolis

Tue 4/7

8:33 pm-9:48 am

1 stop14h 15m

$222

St. LouisIndianapolis

STL - IND

STLIND

Lambert-St Louis

Wed 2/4

8:22 pm-1:15 pm

2 stops15h 53m

Indianapolis

Sun 2/8

12:38 pm-6:51 am

1 stop19h 13m

$236

St. LouisIndianapolis

STL - IND

STLIND

Lambert-St Louis

Wed 3/4

8:17 pm-6:31 pm

1 stop21h 14m

Indianapolis

Wed 3/11

9:28 am-11:19 pm

1 stop14h 51m

$252

St. LouisIndianapolis

STL - IND

STLIND

Lambert-St Louis

Wed 2/4

8:22 pm-11:43 am

1 stop14h 21m

Indianapolis

Sun 2/8

12:38 pm-6:51 am

1 stop19h 13m

$255

St. LouisIndianapolis

STL - IND

STLIND

Lambert-St Louis

Wed 3/4

8:17 pm-6:31 pm

1 stop21h 14m

Indianapolis

Wed 3/11

8:33 pm-11:19 pm

2 stops27h 46m

$272

St. LouisIndianapolis

STL - IND

STLIND

Lambert-St Louis

Mon 2/2

8:22 pm-9:43 am

2 stops36h 21m

Indianapolis

Fri 2/6

12:38 pm-6:51 am

1 stop19h 13m

$279

St. LouisIndianapolis

STL - IND

STLIND

Lambert-St Louis

Mon 2/9

7:50 am-5:45 pm

2 stops8h 55m

Indianapolis

Mon 2/9

7:45 pm-9:45 pm

1 stop3h 00m

$284

St. LouisIndianapolis

STL - IND

STLIND

Lambert-St Louis

Wed 3/18

11:32 am-11:16 am

1 stop22h 44m

Indianapolis

Mon 3/23

5:08 pm-10:31 am

2 stops18h 23m

$290

St. LouisIndianapolis

STL - IND

STLIND

Lambert-St Louis

Wed 3/18

11:32 am-11:16 am

1 stop22h 44m

Indianapolis

Mon 3/23

7:18 pm-11:19 pm

1 stop29h 01m

$297

St. LouisIndianapolis

STL - IND

STLIND

Lambert-St Louis

Wed 3/18

1:39 pm-9:10 pm

1 stop6h 31m

Indianapolis

Fri 3/27

7:59 pm-11:25 pm

1 stop4h 26m

$298

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 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 August is also very affordable. Most momondo users find prices during this month for around $234.

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.

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

As of January 2026, prices for St. Louis to Indianapolis flights are approximately 36% 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

Fastest flight time	6h 24m
Direct flights	None

The fastest flight from St. Louis to Indianapolis takes 6h 24m

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

Search flight deals

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 6h 24m, 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 1 as of January 2026.
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 100% of the total bookings.

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
American Airlines	PriceFrom $185	Free Cancellation	Rating 7.2 11,164 reviews		Search American Airlines flights

Terre Haute

Bloomington

Kokomo

Muncie

Plainfield

Anderson

Greenwood

Noblesville

Fishers

Carmel

Shelbyville

Franklin

West Lafayette

Brownsburg

Seymour

Speedway

Crawfordsville

Greenfield

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.