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Cheap flights from St. Louis to Indianapolis from $70

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 4/22. 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
0 bags

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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
8:16 pm - 7:32 pm
STL
-
IND
22h 16m
1 stop
Frontier Logo
8:46 pm - 7:32 pm
IND
-
STL
23h 46m
1 stop
$209Frontier
Fri, Apr 10 - Fri, Apr 17
American Airlines Logo
6:00 am - 4:53 pm
STL
-
IND
9h 53m
1 stop
American Airlines Logo
5:55 am - 11:47 am
IND
-
STL
6h 52m
1 stop
$237American Airlines
Tue, Apr 7 - Thu, Apr 9
United Airlines Logo
8:21 am - 3:08 pm
STL
-
IND
5h 47m
1 stop
United Airlines Logo
4:10 pm - 9:47 pm
IND
-
STL
6h 37m
1 stop
$250United Airlines
Wed, Apr 8 - Sat, Apr 11
Frontier Logo
4:59 pm - 10:32 am
STL
-
IND
16h 33m
2 stops
Frontier Logo
12:12 pm - 6:50 am
IND
-
STL
19h 38m
1 stop
$254Frontier
Thu, Apr 16 - Sun, Apr 19
United Airlines Logo
7:40 am - 1:06 pm
STL
-
IND
4h 26m
1 stop
United Airlines Logo
6:05 pm - 9:08 pm
IND
-
STL
4h 03m
1 stop
$255United Airlines
Wed, Mar 25 - Wed, Apr 1
Frontier Logo
4:59 pm - 7:38 am
STL
-
IND
13h 39m
1 stop
Frontier Logo
12:12 pm - 6:50 am
IND
-
STL
19h 38m
1 stop
$265Frontier
Thu, Apr 16 - Sun, Apr 19
Southwest Logo
9:50 am - 11:45 am
STL
-
IND
0h 55mnonstop
Southwest Logo
5:30 am - 12:30 pm
IND
-
STL
8h 00m
1 stop
$267Southwest
Tue, Apr 7 - Thu, Apr 9
Frontier Logo
11:32 am - 11:16 am
STL
-
IND
22h 44m
1 stop
Frontier Logo
12:16 pm - 1:34 pm
IND
-
STL
26h 18m
1 stop
$272Frontier
Wed, Mar 18 - Sun, Mar 22
Frontier Logo
8:16 pm - 7:32 pm
STL
-
IND
22h 16m
1 stop
Frontier Logo
4:07 pm - 6:50 am
IND
-
STL
15h 43m
2 stops
$274Frontier
Fri, Apr 10 - Fri, Apr 17
Multiple Airlines Logo
8:12 pm - 7:38 pm
STL
-
IND
22h 26m
1 stop
Multiple Airlines Logo
5:08 pm - 5:34 pm
IND
-
STL
25h 26m
2 stops
$276Multiple Airlines
Wed, Mar 25 - Wed, Apr 1

American Airlines flights from St. Louis to Indianapolis

Our best American Airlines deals on St. Louis to Indianapolis flight tickets
American Airlines
Apr 7
STL6:00 amLambert-St Louis
9h 53m
1 stop
IND4:53 pmIndianapolis
Apr 9
IND5:55 amIndianapolis
6h 52m
1 stop
STL11:47 amLambert-St Louis
$237
American Airlines
May 1
STL7:05 amLambert-St Louis
8h 48m
1 stop
IND4:53 pmIndianapolis
May 3
IND7:43 pmIndianapolis
3h 36m
1 stop
STL10:19 pmLambert-St Louis
$282
American Airlines
May 24
STL6:00 amLambert-St Louis
4h 30m
1 stop
IND11:30 amIndianapolis
May 24
IND8:50 pmIndianapolis
4h 04m
1 stop
STL11:54 pmLambert-St Louis
$317

Southwest flights from St. Louis to Indianapolis

Our best Southwest deals on St. Louis to Indianapolis flight tickets
Southwest
Apr 7
STL9:50 amLambert-St Louis
0h 55m
IND11:45 amIndianapolis
Apr 9
IND5:30 amIndianapolis
8h 00m
1 stop
STL12:30 pmLambert-St Louis
$267
Southwest
May 18
STL8:25 amLambert-St Louis
8h 30m
1 stop
IND5:55 pmIndianapolis
May 19
IND5:10 pmIndianapolis
6h 00m
1 stop
STL10:10 pmLambert-St Louis
$286
Southwest
Apr 8
STL3:10 pmLambert-St Louis
6h 40m
2 stops
IND10:50 pmIndianapolis
Apr 11
IND2:55 pmIndianapolis
5h 50m
2 stops
STL7:45 pmLambert-St Louis
$287

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 February 27, 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

St. LouisIndianapolis

STL - IND

STLIND

Lambert-St Louis

Fri 4/10

8:16 pm-7:32 pm

1 stop22h 16m

Indianapolis

Fri 4/17

8:46 pm-7:32 pm

1 stop23h 46m

$209

St. LouisIndianapolis

STL - IND

STLIND

Lambert-St Louis

Tue 4/7

6:00 am-4:53 pm

1 stop9h 53m

Indianapolis

Thu 4/9

5:55 am-11:47 am

1 stop6h 52m

$237

St. LouisIndianapolis

STL - IND

STLIND

Lambert-St Louis

Wed 4/8

8:21 am-3:08 pm

1 stop5h 47m

Indianapolis

Sat 4/11

4:10 pm-9:47 pm

1 stop6h 37m

$250

St. LouisIndianapolis

STL - IND

STLIND

Lambert-St Louis

Thu 4/16

4:59 pm-10:32 am

2 stops16h 33m

Indianapolis

Sun 4/19

12:12 pm-6:50 am

1 stop19h 38m

$254

St. LouisIndianapolis

STL - IND

STLIND

Lambert-St Louis

Wed 3/25

7:40 am-1:06 pm

1 stop4h 26m

Indianapolis

Wed 4/1

6:05 pm-9:08 pm

1 stop4h 03m

$255

St. LouisIndianapolis

STL - IND

STLIND

Lambert-St Louis

Thu 4/16

4:59 pm-7:38 am

1 stop13h 39m

Indianapolis

Sun 4/19

12:12 pm-6:50 am

1 stop19h 38m

$265

St. LouisIndianapolis

STL - IND

STLIND

Lambert-St Louis

Tue 4/7

9:50 am-11:45 am

Nonstop0h 55m

Indianapolis

Thu 4/9

5:30 am-12:30 pm

1 stop8h 00m

$267

St. LouisIndianapolis

STL - IND

STLIND

Lambert-St Louis

Wed 3/18

11:32 am-11:16 am

1 stop22h 44m

Indianapolis

Sun 3/22

12:16 pm-1:34 pm

1 stop26h 18m

$272

St. LouisIndianapolis

STL - IND

STLIND

Lambert-St Louis

Fri 4/10

8:16 pm-7:32 pm

1 stop22h 16m

Indianapolis

Fri 4/17

4:07 pm-6:50 am

2 stops15h 43m

$274

St. LouisIndianapolis

STL - IND

STLIND

Lambert-St Louis

Wed 3/25

8:12 pm-7:38 pm

1 stop22h 26m

Indianapolis

Wed 4/1

5:08 pm-5:34 pm

2 stops25h 26m

$276

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, 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 February 2026, prices for St. Louis to Indianapolis flights are approximately 52% 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

0h 55m

Direct flights

Fri and Sat

Airports in Indianapolis

1 airport
The fastest flight from St. Louis to Indianapolis takes 0h 55m
Direct flights go from St. Louis to Indianapolis on Friday and Saturday. There are no airlines offering direct flights.
There is 1 airport in Indianapolis. From St. Louis there are direct flights to Indianapolis (IND).
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 0h 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 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 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
7.2
11,357 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
Fishers
Carmel
Shelbyville
Franklin
West Lafayette
Seymour
Brownsburg
Speedway
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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