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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 5/12. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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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
8:13 pm - 11:17 am
STL
-
IND
14h 04m
1 stop
Frontier Logo
12:12 pm - 6:50 am
IND
-
STL
19h 38m
1 stop
$181Frontier
Wed, May 13 - Fri, May 15
Frontier Logo
8:13 pm - 11:17 am
STL
-
IND
14h 04m
1 stop
Frontier Logo
6:11 pm - 6:50 am
IND
-
STL
13h 39m
2 stops
$219Frontier
Wed, May 13 - Fri, May 15
Frontier Logo
8:12 pm - 7:38 pm
STL
-
IND
22h 26m
1 stop
Frontier Logo
8:33 pm - 9:48 am
IND
-
STL
14h 15m
1 stop
$234Frontier
Fri, Mar 27 - Tue, Mar 31
Frontier Logo
4:59 pm - 9:49 am
STL
-
IND
15h 50m
1 stop
Frontier Logo
8:46 pm - 7:32 pm
IND
-
STL
23h 46m
1 stop
$245Frontier
Fri, Apr 24 - Fri, May 1
Frontier Logo
4:59 pm - 7:38 am
STL
-
IND
13h 39m
1 stop
Frontier Logo
10:44 am - 11:19 pm
IND
-
STL
13h 35m
1 stop
$247Frontier
Sat, Apr 25 - Sat, May 2
Frontier Logo
4:16 pm - 2:27 pm
STL
-
IND
21h 11m
1 stop
Frontier Logo
10:44 am - 11:19 pm
IND
-
STL
13h 35m
1 stop
$248Frontier
Sat, Apr 25 - Sat, May 2
Frontier Logo
6:29 pm - 11:23 am
STL
-
IND
15h 54m
1 stop
Frontier Logo
7:09 pm - 7:51 am
IND
-
STL
13h 42m
1 stop
$250Frontier
Thu, Apr 9 - Sun, Apr 12
Frontier Logo
8:12 pm - 7:38 pm
STL
-
IND
22h 26m
1 stop
Frontier Logo
7:03 pm - 7:02 am
IND
-
STL
12h 59m
1 stop
$254Frontier
Wed, Mar 25 - Sun, Mar 29
Frontier Logo
8:23 pm - 7:38 am
STL
-
IND
34h 15m
2 stops
Frontier Logo
8:46 pm - 7:32 pm
IND
-
STL
23h 46m
1 stop
$256Frontier
Fri, Apr 24 - Fri, May 1
Delta Logo
6:32 am - 11:11 am
STL
-
IND
3h 39m
1 stop
Delta Logo
8:00 am - 1:05 pm
IND
-
STL
6h 05m
1 stop
$263Delta
Wed, Apr 8 - Wed, Apr 15

Delta flights from St. Louis to Indianapolis

Our best Delta deals on St. Louis to Indianapolis flight tickets
Delta
Apr 8
STL6:32 amLambert-St Louis
3h 39m
1 stop
IND11:11 amIndianapolis
Apr 15
IND8:00 amIndianapolis
6h 05m
1 stop
STL1:05 pmLambert-St Louis
$263
Delta
Apr 14
STL10:50 amLambert-St Louis
3h 26m
1 stop
IND3:16 pmIndianapolis
Apr 16
IND6:13 amIndianapolis
4h 29m
1 stop
STL9:42 amLambert-St Louis
$277
Delta
Mar 30
STL5:59 pmLambert-St Louis
5h 03m
1 stop
IND12:02 amIndianapolis
Apr 2
IND8:00 amIndianapolis
5h 58m
1 stop
STL12:58 pmLambert-St Louis
$333

Southwest flights from St. Louis to Indianapolis

Our best Southwest deals on St. Louis to Indianapolis flight tickets
Southwest
Apr 8
STL5:35 amLambert-St Louis
5h 30m
1 stop
IND12:05 pmIndianapolis
Apr 15
IND5:30 amIndianapolis
8h 55m
2 stops
STL1:25 pmLambert-St Louis
$268
Southwest
Apr 8
STL5:35 amLambert-St Louis
6h 05m
2 stops
IND12:40 pmIndianapolis
Apr 15
IND6:10 amIndianapolis
7h 40m
2 stops
STL12:50 pmLambert-St Louis
$273
Southwest
Apr 25
STL2:05 pmLambert-St Louis
5h 55m
2 stops
IND9:00 pmIndianapolis
May 2
IND6:35 amIndianapolis
4h 55m
1 stop
STL10:30 amLambert-St Louis
$284

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 March 13, 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

Wed 5/13

8:13 pm-11:17 am

1 stop14h 04m

Indianapolis

Fri 5/15

12:12 pm-6:50 am

1 stop19h 38m

$181

St. LouisIndianapolis

STL - IND

STLIND

Lambert-St Louis

Wed 5/13

8:13 pm-11:17 am

1 stop14h 04m

Indianapolis

Fri 5/15

6:11 pm-6:50 am

2 stops13h 39m

$219

St. LouisIndianapolis

STL - IND

STLIND

Lambert-St Louis

Fri 3/27

8:12 pm-7:38 pm

1 stop22h 26m

Indianapolis

Tue 3/31

8:33 pm-9:48 am

1 stop14h 15m

$234

St. LouisIndianapolis

STL - IND

STLIND

Lambert-St Louis

Fri 4/24

4:59 pm-9:49 am

1 stop15h 50m

Indianapolis

Fri 5/1

8:46 pm-7:32 pm

1 stop23h 46m

$245

St. LouisIndianapolis

STL - IND

STLIND

Lambert-St Louis

Sat 4/25

4:59 pm-7:38 am

1 stop13h 39m

Indianapolis

Sat 5/2

10:44 am-11:19 pm

1 stop13h 35m

$247

St. LouisIndianapolis

STL - IND

STLIND

Lambert-St Louis

Sat 4/25

4:16 pm-2:27 pm

1 stop21h 11m

Indianapolis

Sat 5/2

10:44 am-11:19 pm

1 stop13h 35m

$248

St. LouisIndianapolis

STL - IND

STLIND

Lambert-St Louis

Thu 4/9

6:29 pm-11:23 am

1 stop15h 54m

Indianapolis

Sun 4/12

7:09 pm-7:51 am

1 stop13h 42m

$250

St. LouisIndianapolis

STL - IND

STLIND

Lambert-St Louis

Wed 3/25

8:12 pm-7:38 pm

1 stop22h 26m

Indianapolis

Sun 3/29

7:03 pm-7:02 am

1 stop12h 59m

$254

St. LouisIndianapolis

STL - IND

STLIND

Lambert-St Louis

Fri 4/24

8:23 pm-7:38 am

2 stops34h 15m

Indianapolis

Fri 5/1

8:46 pm-7:32 pm

1 stop23h 46m

$256
Quickest round-trip

St. LouisIndianapolis

STL - IND

STLIND

Lambert-St Louis

Wed 4/8

6:32 am-11:11 am

1 stop3h 39m

Indianapolis

Wed 4/15

8:00 am-1:05 pm

1 stop6h 05m

$263

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
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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 March 2026, prices for St. Louis to Indianapolis flights are approximately 72% 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

4h 50m

Direct flights

Sat

Airports in Indianapolis

1 airport
The fastest flight from St. Louis to Indianapolis takes 4h 50m
Direct flights go from St. Louis to Indianapolis on 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 4h 50m, 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
7.1
11,446 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
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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