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Cheap flights from St. Louis to Indianapolis from $59

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 8/20. 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.
American Airlines Logo
5:13 pm - 11:59 pm-
5h 46m
American Airlines Logo
12:19 pm - 4:20 pm-
5h 01m
$233American Airlines
Sat, Sep 5 - Sun, Sep 6
Frontier Logo
2:29 pm - 10:25 am-
18h 56m
Frontier Logo
4:12 pm - 7:17 pm-
28h 05m
$236Frontier
Mon, Sep 21 - Fri, Sep 25
Southwest Logo
8:25 am - 4:35 pm-
7h 10m
Southwest Logo
7:50 am - 2:55 pm-
8h 05m
$238Southwest
Sat, Sep 5 - Sun, Sep 6
Frontier Logo
6:17 pm - 5:26 pm-
22h 09m
Frontier Logo
9:59 pm - 4:31 pm-
19h 32m
$240Frontier
Thu, Sep 3 - Mon, Sep 7
Southwest Logo
1:40 pm - 9:40 pm-
7h 00m
Southwest Logo
7:50 am - 2:55 pm-
8h 05m
$243Southwest
Sat, Sep 5 - Sun, Sep 6
American Airlines Logo
9:32 am - 3:26 pm-
4h 54m
American Airlines Logo
5:04 am - 8:24 am-
4h 20m
$251American Airlines
Wed, Sep 2 - Mon, Sep 7
Frontier Logo
1:02 pm - 3:17 pm-
25h 15m
Frontier Logo
4:12 pm - 1:10 pm-
21h 58m
$254Frontier
Sun, Sep 13 - Tue, Sep 15
Frontier Logo
8:10 pm - 6:53 pm-
45h 43m
Frontier Logo
6:27 pm - 4:34 pm-
23h 07m
$259Frontier
Sat, Sep 12 - Sat, Sep 19
American Airlines Logo
6:00 am - 11:32 am-
4h 32m
American Airlines Logo
8:52 pm - 12:27 am-
4h 35m
$269American Airlines
Tue, Sep 8 - Thu, Sep 10
United Airlines Logo
5:30 pm - 10:00 pm-
3h 30m
United Airlines Logo
11:38 am - 3:38 pm-
5h 00m
$271United Airlines
Fri, Sep 4 - Sun, Sep 6

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American Airlines flights from St. Louis to Indianapolis

Our best American Airlines deals on St. Louis to Indianapolis flight tickets
American Airlines
Sep 5
STL5:13 pmLambert-St Louis
5h 46m
1 stop
IND11:59 pmIndianapolis
Sep 6
IND12:19 pmIndianapolis
5h 01m
1 stop
STL4:20 pmLambert-St Louis
$233
American Airlines
Sep 2
STL9:32 amLambert-St Louis
4h 54m
1 stop
IND3:26 pmIndianapolis
Sep 7
IND5:04 amIndianapolis
4h 20m
1 stop
STL8:24 amLambert-St Louis
$251
American Airlines
Sep 8
STL6:00 amLambert-St Louis
4h 32m
1 stop
IND11:32 amIndianapolis
Sep 10
IND8:52 pmIndianapolis
4h 35m
1 stop
STL12:27 amLambert-St Louis
$269

United Airlines flights from St. Louis to Indianapolis

Our best United Airlines deals on St. Louis to Indianapolis flight tickets
United Airlines
Sep 4
STL5:30 pmLambert-St Louis
3h 30m
1 stop
IND10:00 pmIndianapolis
Sep 6
IND11:38 amIndianapolis
5h 00m
1 stop
STL3:38 pmLambert-St Louis
$271
United Airlines
Sep 4
STL9:30 amLambert-St Louis
6h 03m
1 stop
IND4:33 pmIndianapolis
Sep 7
IND6:00 amIndianapolis
3h 39m
1 stop
STL8:39 amLambert-St Louis
$289
United Airlines
Aug 18
STL10:53 amLambert-St Louis
4h 40m
1 stop
IND4:33 pmIndianapolis
Aug 22
IND2:00 pmIndianapolis
6h 16m
1 stop
STL7:16 pmLambert-St Louis
$303

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 August 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

St. LouisIndianapolis

STL - IND

STLIND

Lambert-St Louis

Sat 9/5

5:13 pm-11:59 pm

1 stop5h 46m

Indianapolis

Sun 9/6

12:19 pm-4:20 pm

1 stop5h 01m

$233

St. LouisIndianapolis

STL - IND

STLIND

Lambert-St Louis

Mon 9/21

2:29 pm-10:25 am

2 stops18h 56m

Indianapolis

Fri 9/25

4:12 pm-7:17 pm

1 stop28h 05m

$236

St. LouisIndianapolis

STL - IND

STLIND

Lambert-St Louis

Sat 9/5

8:25 am-4:35 pm

1 stop7h 10m

Indianapolis

Sun 9/6

7:50 am-2:55 pm

2 stops8h 05m

$238

St. LouisIndianapolis

STL - IND

STLIND

Lambert-St Louis

Thu 9/3

6:17 pm-5:26 pm

1 stop22h 09m

Indianapolis

Mon 9/7

9:59 pm-4:31 pm

1 stop19h 32m

$240

St. LouisIndianapolis

STL - IND

STLIND

Lambert-St Louis

Sat 9/5

1:40 pm-9:40 pm

2 stops7h 00m

Indianapolis

Sun 9/6

7:50 am-2:55 pm

2 stops8h 05m

$243

St. LouisIndianapolis

STL - IND

STLIND

Lambert-St Louis

Wed 9/2

9:32 am-3:26 pm

1 stop4h 54m

Indianapolis

Mon 9/7

5:04 am-8:24 am

1 stop4h 20m

$251

St. LouisIndianapolis

STL - IND

STLIND

Lambert-St Louis

Sun 9/13

1:02 pm-3:17 pm

1 stop25h 15m

Indianapolis

Tue 9/15

4:12 pm-1:10 pm

2 stops21h 58m

$254

St. LouisIndianapolis

STL - IND

STLIND

Lambert-St Louis

Sat 9/12

8:10 pm-6:53 pm

2 stops45h 43m

Indianapolis

Sat 9/19

6:27 pm-4:34 pm

1 stop23h 07m

$259

St. LouisIndianapolis

STL - IND

STLIND

Lambert-St Louis

Tue 9/8

6:00 am-11:32 am

1 stop4h 32m

Indianapolis

Thu 9/10

8:52 pm-12:27 am

1 stop4h 35m

$269
Quickest round-trip

St. LouisIndianapolis

STL - IND

STLIND

Lambert-St Louis

Fri 9/4

5:30 pm-10:00 pm

1 stop3h 30m

Indianapolis

Sun 9/6

11:38 am-3:38 pm

1 stop5h 00m

$271

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 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 August 2026, prices for St. Louis to Indianapolis flights are approximately 14% 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

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

3h 55m

Direct flights

None
The fastest flight from St. Louis to Indianapolis takes 3h 55m
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 3h 55m, 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
Anderson
Plainfield
Greenwood
Noblesville
Carmel
West Lafayette
Speedway
Fishers
Franklin
Westfield
Seymour
Shelbyville
Brownsburg
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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