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Cheap flights from St. Louis to Indianapolis from $116

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 8/12. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

Find the cheapest flights from St. Louis to Indianapolis

Cheap round-trip flights

Enter your travel dates to find the best prices.
Frontier Logo
6:34 pm - 11:25 am
STL
-
IND
15h 51m
1 stop
Frontier Logo
10:53 am - 11:59 pm
IND
-
STL
14h 06m
1 stop
$182Frontier
Thu, Jul 23 - Sat, Jul 25
Multiple Airlines Logo
6:34 pm - 11:25 am
STL
-
IND
15h 51m
1 stop
Multiple Airlines Logo
8:00 am - 8:57 am
IND
-
STL
25h 57m
2 stops
$197Multiple Airlines
Thu, Aug 6 - Thu, Aug 13
Frontier Logo
6:34 pm - 11:25 am
STL
-
IND
15h 51m
1 stop
Frontier Logo
11:00 am - 8:57 am
IND
-
STL
22h 57m
2 stops
$229Frontier
Tue, Aug 11 - Thu, Aug 13
United Airlines Logo
12:59 pm - 5:54 pm
STL
-
IND
3h 55m
1 stop
United Airlines Logo
7:31 pm - 10:59 pm
IND
-
STL
4h 28m
1 stop
$233United Airlines
Sat, Aug 15 - Sat, Aug 22
Multiple Airlines Logo
6:34 pm - 11:25 am
STL
-
IND
15h 51m
1 stop
Multiple Airlines Logo
9:21 pm - 8:57 am
IND
-
STL
36h 36m
2 stops
$234Multiple Airlines
Thu, Jul 30 - Thu, Aug 6
Multiple Airlines Logo
6:34 pm - 11:25 am
STL
-
IND
15h 51m
1 stop
Multiple Airlines Logo
7:30 am - 5:37 pm
IND
-
STL
11h 07m
2 stops
$238Multiple Airlines
Tue, Aug 11 - Thu, Aug 13
Frontier Logo
6:34 pm - 11:25 am
STL
-
IND
15h 51m
1 stop
Frontier Logo
11:00 am - 11:59 pm
IND
-
STL
13h 59m
1 stop
$240Frontier
Tue, Aug 11 - Thu, Aug 13
Frontier Logo
4:09 pm - 9:48 am
STL
-
IND
16h 39m
1 stop
Frontier Logo
11:00 am - 11:59 pm
IND
-
STL
13h 59m
1 stop
$241Frontier
Tue, Aug 11 - Thu, Aug 13
Frontier Logo
6:34 pm - 11:25 am
STL
-
IND
15h 51m
1 stop
Frontier Logo
8:53 pm - 8:57 am
IND
-
STL
13h 04m
2 stops
$243Frontier
Tue, Aug 11 - Thu, Aug 13
Multiple Airlines Logo
6:34 pm - 11:25 am
STL
-
IND
15h 51m
1 stop
Multiple Airlines Logo
8:00 am - 8:57 am
IND
-
STL
25h 57m
2 stops
$245Multiple Airlines
Sun, Aug 2 - Sun, Aug 9

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Frontier flights from St. Louis to Indianapolis

Our best Frontier deals on St. Louis to Indianapolis flight tickets
Frontier
Jul 23
STL6:34 pmLambert-St Louis
15h 51m
1 stop
IND11:25 amIndianapolis
Jul 25
IND10:53 amIndianapolis
14h 06m
1 stop
STL11:59 pmLambert-St Louis
$182
Frontier
Aug 11
STL6:34 pmLambert-St Louis
15h 51m
1 stop
IND11:25 amIndianapolis
Aug 13
IND11:00 amIndianapolis
22h 57m
2 stops
STL8:57 amLambert-St Louis
$229
Frontier
Aug 11
STL6:34 pmLambert-St Louis
15h 51m
1 stop
IND11:25 amIndianapolis
Aug 13
IND11:00 amIndianapolis
13h 59m
1 stop
STL11:59 pmLambert-St Louis
$240

United Airlines flights from St. Louis to Indianapolis

Our best United Airlines deals on St. Louis to Indianapolis flight tickets
United Airlines
Aug 15
STL12:59 pmLambert-St Louis
3h 55m
1 stop
IND5:54 pmIndianapolis
Aug 22
IND7:31 pmIndianapolis
4h 28m
1 stop
STL10:59 pmLambert-St Louis
$233
United Airlines
Aug 11
STL8:50 amLambert-St Louis
6h 43m
1 stop
IND4:33 pmIndianapolis
Aug 12
IND7:30 pmIndianapolis
4h 29m
1 stop
STL10:59 pmLambert-St Louis
$303
United Airlines
Aug 11
STL8:50 amLambert-St Louis
6h 43m
1 stop
IND4:33 pmIndianapolis
Aug 12
IND7:30 pmIndianapolis
4h 29m
1 stop
STL10:59 pmLambert-St Louis
$329

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 July 7, 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

St. LouisIndianapolis

STL - IND

STLIND

Lambert-St Louis

Thu 7/23

6:34 pm-11:25 am

1 stop15h 51m

Indianapolis

Sat 7/25

10:53 am-11:59 pm

1 stop14h 06m

$182

St. LouisIndianapolis

STL - IND

STLIND

Lambert-St Louis

Thu 8/6

6:34 pm-11:25 am

1 stop15h 51m

Indianapolis

Thu 8/13

8:00 am-8:57 am

2 stops25h 57m

$197

St. LouisIndianapolis

STL - IND

STLIND

Lambert-St Louis

Tue 8/11

6:34 pm-11:25 am

1 stop15h 51m

Indianapolis

Thu 8/13

11:00 am-8:57 am

2 stops22h 57m

$229
Quickest round-trip

St. LouisIndianapolis

STL - IND

STLIND

Lambert-St Louis

Sat 8/15

12:59 pm-5:54 pm

1 stop3h 55m

Indianapolis

Sat 8/22

7:31 pm-10:59 pm

1 stop4h 28m

$233

St. LouisIndianapolis

STL - IND

STLIND

Lambert-St Louis

Thu 7/30

6:34 pm-11:25 am

1 stop15h 51m

Indianapolis

Thu 8/6

9:21 pm-8:57 am

2 stops36h 36m

$234

St. LouisIndianapolis

STL - IND

STLIND

Lambert-St Louis

Tue 8/11

6:34 pm-11:25 am

1 stop15h 51m

Indianapolis

Thu 8/13

7:30 am-5:37 pm

2 stops11h 07m

$238

St. LouisIndianapolis

STL - IND

STLIND

Lambert-St Louis

Tue 8/11

6:34 pm-11:25 am

1 stop15h 51m

Indianapolis

Thu 8/13

11:00 am-11:59 pm

1 stop13h 59m

$240

St. LouisIndianapolis

STL - IND

STLIND

Lambert-St Louis

Tue 8/11

4:09 pm-9:48 am

1 stop16h 39m

Indianapolis

Thu 8/13

11:00 am-11:59 pm

1 stop13h 59m

$241

St. LouisIndianapolis

STL - IND

STLIND

Lambert-St Louis

Tue 8/11

6:34 pm-11:25 am

1 stop15h 51m

Indianapolis

Thu 8/13

8:53 pm-8:57 am

2 stops13h 04m

$243

St. LouisIndianapolis

STL - IND

STLIND

Lambert-St Louis

Sun 8/2

6:34 pm-11:25 am

1 stop15h 51m

Indianapolis

Sun 8/9

8:00 am-8:57 am

2 stops25h 57m

$245

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, May 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 $0. If you are unable to visit Indianapolis during the month of May, 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 Lambert-St Louis to Indianapolis flight route?

Fly from Lambert-St Louis to Indianapolis for the best Lambert-St Louis - Indianapolis flight prices

What cabin class options are available on St. Louis to Indianapolis flights?

There is only 1 cabin class available to choose from on St. Louis to Indianapolis flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

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

As of July 2026, prices for St. Louis to Indianapolis flights are approximately 3% 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

4h 22m

Direct flights

None
The fastest flight from St. Louis to Indianapolis takes 4h 22m
There are no direct flights from St. Louis to Indianapolis. There are no popular flight routes from St. Louis to Indianapolis.
Search flight deals

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 4h 22m, 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 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?

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
Shelbyville
Franklin
Fishers
Speedway
Seymour
Westfield
Brownsburg
West Lafayette
Crawfordsville
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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