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Cheap flights from St. Louis to Indianapolis from $65

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from St. Louis to Indianapolis departing on 4/29. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Find the cheapest flights from St. Louis to Indianapolis

Cheap round-trip flights

Enter your travel dates to find the best prices.
Frontier Logo
8:39 am - 3:22 pm
STL
-
IND
5h 43m
1 stop
Frontier Logo
1:20 pm - 11:19 pm
IND
-
STL
10h 59m
1 stop
$160Frontier
Fri, Apr 24 - Sun, Apr 26
Frontier Logo
8:39 am - 3:22 pm
STL
-
IND
5h 43m
1 stop
Frontier Logo
12:07 pm - 11:19 pm
IND
-
STL
12h 12m
1 stop
$180Frontier
Fri, Apr 17 - Tue, Apr 21
Frontier Logo
8:23 pm - 11:17 am
STL
-
IND
13h 54m
1 stop
Frontier Logo
6:01 pm - 6:50 am
IND
-
STL
13h 49m
2 stops
$182Frontier
Sat, May 2 - Sun, May 3
Frontier Logo
11:25 am - 10:32 am
STL
-
IND
22h 07m
1 stop
Frontier Logo
7:14 pm - 6:50 am
IND
-
STL
36h 36m
2 stops
$210Frontier
Thu, Apr 16 - Mon, Apr 20
Frontier Logo
6:33 pm - 11:23 am
STL
-
IND
15h 50m
1 stop
Frontier Logo
12:14 pm - 8:55 am
IND
-
STL
21h 41m
1 stop
$214Frontier
Tue, May 19 - Fri, May 29
Multiple Airlines Logo
11:21 am - 10:32 am
STL
-
IND
22h 11m
1 stop
Multiple Airlines Logo
8:36 pm - 8:55 am
IND
-
STL
37h 19m
2 stops
$219Multiple Airlines
Thu, Apr 30 - Thu, May 7
Frontier Logo
6:33 pm - 11:23 am
STL
-
IND
15h 50m
1 stop
Frontier Logo
8:39 pm - 5:33 pm
IND
-
STL
21h 54m
2 stops
$226Frontier
Tue, May 19 - Wed, May 27
Frontier Logo
6:33 pm - 11:23 am
STL
-
IND
15h 50m
1 stop
Frontier Logo
12:14 pm - 12:21 am
IND
-
STL
13h 07m
2 stops
$232Frontier
Tue, May 19 - Fri, May 29
Frontier Logo
11:25 am - 10:32 am
STL
-
IND
22h 07m
1 stop
Frontier Logo
7:14 pm - 11:19 pm
IND
-
STL
29h 05m
1 stop
$240Frontier
Thu, Apr 16 - Mon, Apr 20
Multiple Airlines Logo
6:33 pm - 11:23 am
STL
-
IND
15h 50m
1 stop
Multiple Airlines Logo
12:26 pm - 8:55 am
IND
-
STL
21h 29m
2 stops
$244Multiple Airlines
Tue, May 19 - Tue, May 26

momondo Fare Finder

 
Customize your flight search to find flights from St. Louis to Indianapolis that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated April 4, 2026.
Use the filters below to find and compare flights from St. Louis to Indianapolis that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip
Quickest round-trip

St. LouisIndianapolis

STL - IND

STLIND

Lambert-St Louis

Fri 4/24

8:39 am-3:22 pm

1 stop5h 43m

Indianapolis

Sun 4/26

1:20 pm-11:19 pm

1 stop10h 59m

$160

St. LouisIndianapolis

STL - IND

STLIND

Lambert-St Louis

Fri 4/17

8:39 am-3:22 pm

1 stop5h 43m

Indianapolis

Tue 4/21

12:07 pm-11:19 pm

1 stop12h 12m

$180

St. LouisIndianapolis

STL - IND

STLIND

Lambert-St Louis

Sat 5/2

8:23 pm-11:17 am

1 stop13h 54m

Indianapolis

Sun 5/3

6:01 pm-6:50 am

2 stops13h 49m

$182

St. LouisIndianapolis

STL - IND

STLIND

Lambert-St Louis

Thu 4/16

11:25 am-10:32 am

1 stop22h 07m

Indianapolis

Mon 4/20

7:14 pm-6:50 am

2 stops36h 36m

$210

St. LouisIndianapolis

STL - IND

STLIND

Lambert-St Louis

Tue 5/19

6:33 pm-11:23 am

1 stop15h 50m

Indianapolis

Fri 5/29

12:14 pm-8:55 am

1 stop21h 41m

$214

St. LouisIndianapolis

STL - IND

STLIND

Lambert-St Louis

Thu 4/30

11:21 am-10:32 am

1 stop22h 11m

Indianapolis

Thu 5/7

8:36 pm-8:55 am

2 stops37h 19m

$219

St. LouisIndianapolis

STL - IND

STLIND

Lambert-St Louis

Tue 5/19

6:33 pm-11:23 am

1 stop15h 50m

Indianapolis

Wed 5/27

8:39 pm-5:33 pm

2 stops21h 54m

$226

St. LouisIndianapolis

STL - IND

STLIND

Lambert-St Louis

Tue 5/19

6:33 pm-11:23 am

1 stop15h 50m

Indianapolis

Fri 5/29

12:14 pm-12:21 am

2 stops13h 07m

$232

St. LouisIndianapolis

STL - IND

STLIND

Lambert-St Louis

Thu 4/16

11:25 am-10:32 am

1 stop22h 07m

Indianapolis

Mon 4/20

7:14 pm-11:19 pm

1 stop29h 05m

$240

St. LouisIndianapolis

STL - IND

STLIND

Lambert-St Louis

Tue 5/19

6:33 pm-11:23 am

1 stop15h 50m

Indianapolis

Tue 5/26

12:26 pm-8:55 am

2 stops21h 29m

$244

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Indianapolis from

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

What is the typical price of a round-trip flight between St. Louis and Indianapolis?

What is the cheapest month to fly to Indianapolis?

In general, August 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 $234. If you are unable to visit Indianapolis during the month of August, then departing from St. Louis during the month September is also very affordable. Most momondo users find prices during this month for around $235.

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 April 2026, prices for St. Louis to Indianapolis flights are approximately 181% more expensive 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

Frequently asked questions about flying from St. Louis to Indianapolis

  • 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 5h 43m, 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?

  • 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 plane model from St. Louis to Indianapolis?

  • What is the most popular airline from St. Louis to Indianapolis?

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 AirlinesPriceFrom $185Free CancellationRating
7.1
11,559 reviews
Search American Airlines flights

Traveling to a place near Indianapolis?

Book flights to Indianapolis if you plan to visit one of these locations
Terre Haute
Bloomington
Kokomo
Muncie
Plainfield
Anderson
Greenwood
Noblesville
Carmel
Fishers
Shelbyville
Franklin
Speedway
West Lafayette
Seymour
Brownsburg
Crawfordsville
Westfield
Greenfield
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.

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