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Cheap flights from St. Louis to Indianapolis from $129

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 12/13. 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
3:30 pm - 10:36 amSTL-IND
18h 06m1 stop
Frontier Logo
11:19 am - 10:33 pmIND-STL
12h 14m1 stop
$163Frontier
Find Deal
Thu, Dec 11 - Mon, Dec 15
Delta Logo
5:25 pm - 10:30 pmSTL-IND
4h 05m1 stop
Delta Logo
5:54 pm - 8:43 pmIND-STL
3h 49m1 stop
$235Delta
Find Deal
Thu, Jan 8 - Mon, Jan 12
Multiple Airlines Logo
8:45 am - 10:38 pmSTL-IND
12h 53m2 stops
Multiple Airlines Logo
8:56 pm - 10:02 amIND-STL
14h 06m1 stop
$270Multiple Airlines
Find Deal
Fri, Feb 27 - Sun, Mar 1
Delta Logo
5:25 pm - 10:30 pmSTL-IND
4h 05m1 stop
Delta Logo
7:25 pm - 11:39 pmIND-STL
5h 14m1 stop
$279Delta
Find Deal
Thu, Jan 8 - Mon, Jan 12
Delta Logo
5:59 pm - 10:54 pmSTL-IND
3h 55m1 stop
Delta Logo
7:38 pm - 11:42 pmIND-STL
5h 04m1 stop
$298Delta
Find Deal
Mon, Dec 22 - Mon, Dec 29
Frontier Logo
10:10 pm - 5:44 pmSTL-IND
18h 34m2 stops
Frontier Logo
1:09 pm - 9:40 amIND-STL
21h 31m1 stop
$302Frontier
Find Deal
Mon, Dec 22 - Mon, Dec 29
United Airlines Logo
6:35 pm - 11:44 pmSTL-IND
4h 09m1 stop
United Airlines Logo
9:00 am - 12:27 pmIND-STL
4h 27m1 stop
$317United Airlines
Find Deal
Fri, Dec 26 - Mon, Dec 29
American Airlines Logo
4:53 pm - 10:29 pmSTL-IND
4h 36m1 stop
American Airlines Logo
8:11 pm - 11:55 pmIND-STL
4h 44m1 stop
$322American Airlines
Find Deal
Fri, Dec 26 - Mon, Dec 29
American Airlines Logo
5:54 am - 1:37 pmSTL-IND
6h 43m1 stop
American Airlines Logo
8:11 pm - 11:55 pmIND-STL
4h 44m1 stop
$327American Airlines
Find Deal
Mon, Dec 22 - Mon, Dec 29
Multiple Airlines Logo
3:30 pm - 9:35 pmSTL-IND
29h 05m1 stop
Multiple Airlines Logo
8:48 pm - 9:52 amIND-STL
14h 04m2 stops
$328Multiple Airlines
Find Deal
Wed, Dec 10 - Sun, Dec 14

Frontier flights from St. Louis to Indianapolis

Our best Frontier deals on St. Louis to Indianapolis flight tickets
Frontier
Dec 11
STL3:30 pmLambert-St Louis
18h 06m
1 stop
IND10:36 amIndianapolis
Dec 15
IND11:19 amIndianapolis
12h 14m
1 stop
STL10:33 pmLambert-St Louis
$163
Find similar
Frontier
Dec 22
STL10:10 pmLambert-St Louis
18h 34m
2 stops
IND5:44 pmIndianapolis
Dec 29
IND1:09 pmIndianapolis
21h 31m
1 stop
STL9:40 amLambert-St Louis
$302
Find similar

United Airlines flights from St. Louis to Indianapolis

Our best United Airlines deals on St. Louis to Indianapolis flight tickets
United Airlines
Dec 26
STL6:35 pmLambert-St Louis
4h 09m
1 stop
IND11:44 pmIndianapolis
Dec 29
IND9:00 amIndianapolis
4h 27m
1 stop
STL12:27 pmLambert-St Louis
$317
Find similar
United Airlines
Dec 22
STL5:02 pmLambert-St Louis
3h 57m
1 stop
IND9:59 pmIndianapolis
Dec 29
IND11:20 amIndianapolis
4h 06m
1 stop
STL2:26 pmLambert-St Louis
$358
Find similar
United Airlines
Dec 10
STL11:50 amLambert-St Louis
7h 37m
1 stop
IND8:27 pmIndianapolis
Dec 14
IND9:35 amIndianapolis
3h 40m
1 stop
STL12:15 pmLambert-St Louis
$397
Find similar

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 November 26, 2025.
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

Thu 12/11

3:30 pm-10:36 am

1 stop18h 06m

Indianapolis

Mon 12/15

11:19 am-10:33 pm

1 stop12h 14m

$163

St. LouisIndianapolis

STL - IND

STLIND

Lambert-St Louis

Thu 1/8

5:25 pm-10:30 pm

1 stop4h 05m

Indianapolis

Mon 1/12

5:54 pm-8:43 pm

1 stop3h 49m

$235

St. LouisIndianapolis

STL - IND

STLIND

Lambert-St Louis

Fri 2/27

8:45 am-10:38 pm

2 stops12h 53m

Indianapolis

Sun 3/1

8:56 pm-10:02 am

1 stop14h 06m

$270

St. LouisIndianapolis

STL - IND

STLIND

Lambert-St Louis

Thu 1/8

5:25 pm-10:30 pm

1 stop4h 05m

Indianapolis

Mon 1/12

7:25 pm-11:39 pm

1 stop5h 14m

$279

St. LouisIndianapolis

STL - IND

STLIND

Lambert-St Louis

Mon 12/22

5:59 pm-10:54 pm

1 stop3h 55m

Indianapolis

Mon 12/29

7:38 pm-11:42 pm

1 stop5h 04m

$298

St. LouisIndianapolis

STL - IND

STLIND

Lambert-St Louis

Mon 12/22

10:10 pm-5:44 pm

2 stops18h 34m

Indianapolis

Mon 12/29

1:09 pm-9:40 am

1 stop21h 31m

$302

St. LouisIndianapolis

STL - IND

STLIND

Lambert-St Louis

Fri 12/26

6:35 pm-11:44 pm

1 stop4h 09m

Indianapolis

Mon 12/29

9:00 am-12:27 pm

1 stop4h 27m

$317

St. LouisIndianapolis

STL - IND

STLIND

Lambert-St Louis

Fri 12/26

4:53 pm-10:29 pm

1 stop4h 36m

Indianapolis

Mon 12/29

8:11 pm-11:55 pm

1 stop4h 44m

$322

St. LouisIndianapolis

STL - IND

STLIND

Lambert-St Louis

Mon 12/22

5:54 am-1:37 pm

1 stop6h 43m

Indianapolis

Mon 12/29

8:11 pm-11:55 pm

1 stop4h 44m

$327

St. LouisIndianapolis

STL - IND

STLIND

Lambert-St Louis

Wed 12/10

3:30 pm-9:35 pm

1 stop29h 05m

Indianapolis

Sun 12/14

8:48 pm-9:52 am

2 stops14h 04m

$328

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 19 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, April 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 $226. If you are unable to visit Indianapolis during the month of April, 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 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.

What is the cheapest time of day to depart on your flight to Indianapolis?

Flying to Indianapolis from St. Louis at noon is the least expensive time of day to depart. momondo users have found prices as low as $256 when looking at flights departing at noon. If you have a flexible travel schedule, then try to avoid flying in the morning when prices are $1,297 on average. Flights to Indianapolis from St. Louis in the morning are generally more expensive because this time of day is more convenient for travelers’ schedules.

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

As of November 2025, prices for St. Louis to Indianapolis flights are approximately 56% 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 43m

Direct flights

None
The fastest flight from St. Louis to Indianapolis takes 3h 43m
There are no direct flights from St. Louis to Indianapolis. There are no popular flight routes from St. Louis to Indianapolis.
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 3h 20m, 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 $226Free CancellationRating
7.2
11,038 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
Anderson
Plainfield
Greenwood
Noblesville
Fishers
Carmel
Shelbyville
West Lafayette
Seymour
Franklin
Speedway
Crawfordsville
Brownsburg
Greenfield
Westfield
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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