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Cheap flights from St. Louis to Indianapolis from $87

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 7/23. 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
12:20 pm - 8:57 am
IND
-
STL
21h 37m
1 stop
$170Frontier
Tue, Aug 4 - Fri, Aug 7
Frontier Logo
6:34 pm - 11:25 am
STL
-
IND
15h 51m
1 stop
Frontier Logo
6:32 pm - 5:37 pm
IND
-
STL
24h 05m
2 stops
$231Frontier
Thu, Jul 16 - Mon, Jul 20
Frontier Logo
4:09 pm - 6:53 pm
STL
-
IND
25h 44m
1 stop
Frontier Logo
10:53 am - 11:59 pm
IND
-
STL
14h 06m
1 stop
$235Frontier
Wed, Aug 5 - Wed, Aug 12
Frontier Logo
7:03 pm - 9:48 am
STL
-
IND
13h 45m
2 stops
Frontier Logo
12:20 pm - 8:57 am
IND
-
STL
21h 37m
1 stop
$240Frontier
Tue, Aug 4 - Fri, Aug 7
Frontier Logo
4:09 pm - 9:48 am
STL
-
IND
16h 39m
1 stop
Frontier Logo
8:53 pm - 7:23 pm
IND
-
STL
23h 30m
1 stop
$242Frontier
Tue, Jul 14 - Wed, Jul 15
Frontier Logo
4:09 pm - 10:03 am
STL
-
IND
16h 54m
1 stop
Frontier Logo
8:53 pm - 7:23 pm
IND
-
STL
23h 30m
1 stop
$247Frontier
Sat, Jul 18 - Wed, Jul 22
Frontier Logo
4:09 pm - 10:03 am
STL
-
IND
16h 54m
1 stop
Frontier Logo
7:10 pm - 11:59 pm
IND
-
STL
29h 49m
1 stop
$254Frontier
Wed, Aug 5 - Wed, Aug 12
Frontier Logo
4:09 pm - 10:03 am
STL
-
IND
16h 54m
1 stop
Frontier Logo
7:10 pm - 5:37 pm
IND
-
STL
23h 27m
2 stops
$257Frontier
Wed, Aug 5 - Wed, Aug 12
Frontier Logo
4:09 pm - 10:03 am
STL
-
IND
16h 54m
1 stop
Frontier Logo
7:10 pm - 5:37 pm
IND
-
STL
23h 27m
2 stops
$261Frontier
Wed, Jul 22 - Wed, Jul 29
American Airlines Logo
6:55 am - 3:03 pm
STL
-
IND
7h 08m
1 stop
American Airlines Logo
12:20 pm - 12:16 am
IND
-
STL
12h 56m
1 stop
$263American Airlines
Wed, Jul 22 - Wed, Jul 29

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United Airlines flights from St. Louis to Indianapolis

Our best United Airlines deals on St. Louis to Indianapolis flight tickets
United Airlines
Aug 11
STL12:27 pmLambert-St Louis
8h 32m
1 stop
IND9:59 pmIndianapolis
Aug 12
IND12:34 pmIndianapolis
4h 04m
1 stop
STL3:38 pmLambert-St Louis
$335
United Airlines
Jul 4
STL3:22 pmLambert-St Louis
3h 51m
1 stop
IND8:13 pmIndianapolis
Jul 7
IND3:19 pmIndianapolis
3h 54m
1 stop
STL6:13 pmLambert-St Louis
$437
United Airlines
Jul 7
STL1:13 pmLambert-St Louis
3h 39m
1 stop
IND5:52 pmIndianapolis
Jul 11
IND4:25 pmIndianapolis
3h 58m
1 stop
STL7:23 pmLambert-St Louis
$507

Frontier flights from St. Louis to Indianapolis

Our best Frontier deals on St. Louis to Indianapolis flight tickets
Frontier
Jul 16
STL6:34 pmLambert-St Louis
15h 51m
1 stop
IND11:25 amIndianapolis
Jul 20
IND6:32 pmIndianapolis
24h 05m
2 stops
STL5:37 pmLambert-St Louis
$231
Frontier
Aug 5
STL4:09 pmLambert-St Louis
25h 44m
1 stop
IND6:53 pmIndianapolis
Aug 12
IND10:53 amIndianapolis
14h 06m
1 stop
STL11:59 pmLambert-St Louis
$235
Frontier
Aug 8
STL4:09 pmLambert-St Louis
16h 54m
1 stop
IND10:03 amIndianapolis
Aug 10
IND10:53 amIndianapolis
14h 06m
1 stop
STL11:59 pmLambert-St Louis
$241

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 June 24, 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

Tue 8/4

6:34 pm-11:25 am

1 stop15h 51m

Indianapolis

Fri 8/7

12:20 pm-8:57 am

1 stop21h 37m

$170

St. LouisIndianapolis

STL - IND

STLIND

Lambert-St Louis

Thu 7/16

6:34 pm-11:25 am

1 stop15h 51m

Indianapolis

Mon 7/20

6:32 pm-5:37 pm

2 stops24h 05m

$231

St. LouisIndianapolis

STL - IND

STLIND

Lambert-St Louis

Wed 8/5

4:09 pm-6:53 pm

1 stop25h 44m

Indianapolis

Wed 8/12

10:53 am-11:59 pm

1 stop14h 06m

$235

St. LouisIndianapolis

STL - IND

STLIND

Lambert-St Louis

Tue 8/4

7:03 pm-9:48 am

2 stops13h 45m

Indianapolis

Fri 8/7

12:20 pm-8:57 am

1 stop21h 37m

$240

St. LouisIndianapolis

STL - IND

STLIND

Lambert-St Louis

Tue 7/14

4:09 pm-9:48 am

1 stop16h 39m

Indianapolis

Wed 7/15

8:53 pm-7:23 pm

1 stop23h 30m

$242

St. LouisIndianapolis

STL - IND

STLIND

Lambert-St Louis

Sat 7/18

4:09 pm-10:03 am

1 stop16h 54m

Indianapolis

Wed 7/22

8:53 pm-7:23 pm

1 stop23h 30m

$247

St. LouisIndianapolis

STL - IND

STLIND

Lambert-St Louis

Wed 8/5

4:09 pm-10:03 am

1 stop16h 54m

Indianapolis

Wed 8/12

7:10 pm-11:59 pm

1 stop29h 49m

$254

St. LouisIndianapolis

STL - IND

STLIND

Lambert-St Louis

Wed 8/5

4:09 pm-10:03 am

1 stop16h 54m

Indianapolis

Wed 8/12

7:10 pm-5:37 pm

2 stops23h 27m

$257

St. LouisIndianapolis

STL - IND

STLIND

Lambert-St Louis

Wed 7/22

4:09 pm-10:03 am

1 stop16h 54m

Indianapolis

Wed 7/29

7:10 pm-5:37 pm

2 stops23h 27m

$261
Quickest round-trip

St. LouisIndianapolis

STL - IND

STLIND

Lambert-St Louis

Wed 7/22

6:55 am-3:03 pm

1 stop7h 08m

Indianapolis

Wed 7/29

12:20 pm-12:16 am

1 stop12h 56m

$263

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.

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

As of June 2026, prices for St. Louis to Indianapolis flights are approximately 4% 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 46m

Direct flights

None
The fastest flight from St. Louis to Indianapolis takes 4h 46m
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 46m, 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
West Lafayette
Crawfordsville
Brownsburg
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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