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Cheap flights from St. Louis to Indianapolis from $121

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 12/5. 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.
Multiple Airlines Logo
10:42 am - 9:43 amSTL-IND
22h 01m2 stops
Multiple Airlines Logo
3:12 pm - 10:33 pmIND-STL
8h 21m1 stop
$184Multiple Airlines
Find Deal
Thu, Jan 29 - Fri, Jan 30
Multiple Airlines Logo
3:30 pm - 9:35 pmSTL-IND
29h 05m1 stop
Multiple Airlines Logo
12:22 pm - 10:33 pmIND-STL
11h 11m1 stop
$237Multiple Airlines
Find Deal
Tue, Dec 9 - Sat, Dec 13
Multiple Airlines Logo
4:13 pm - 8:08 amSTL-IND
14h 55m1 stop
Multiple Airlines Logo
11:44 am - 11:57 pmIND-STL
37h 13m2 stops
$246Multiple Airlines
Find Deal
Wed, Nov 26 - Sun, Nov 30
Delta Logo
7:10 am - 1:23 pmSTL-IND
5h 13m1 stop
Delta Logo
12:10 pm - 4:39 pmIND-STL
5h 29m1 stop
$257Delta
Find Deal
Tue, Jan 27 - Wed, Feb 4
Southwest Logo
8:25 am - 5:00 pmSTL-IND
7h 35m2 stops
Southwest Logo
3:40 pm - 7:40 pmIND-STL
5h 00m1 stop
$262Southwest
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Tue, Dec 9 - Sat, Dec 13
Delta Logo
6:35 am - 11:30 amSTL-IND
3h 55m1 stop
Delta Logo
6:30 pm - 11:39 pmIND-STL
6h 09m1 stop
$268Delta
Find Deal
Thu, Jan 29 - Tue, Feb 3
Frontier Logo
7:03 pm - 6:26 pmSTL-IND
22h 23m1 stop
Frontier Logo
12:59 pm - 11:57 pmIND-STL
11h 58m1 stop
$277Frontier
Find Deal
Wed, Nov 26 - Sun, Nov 30
Delta Logo
6:35 am - 11:30 amSTL-IND
3h 55m1 stop
Delta Logo
6:55 pm - 11:39 pmIND-STL
5h 44m1 stop
$279Delta
Find Deal
Thu, Jan 29 - Mon, Feb 2
Southwest Logo
8:15 am - 3:05 pmSTL-IND
5h 50m1 stop
Southwest Logo
5:35 am - 12:45 pmIND-STL
8h 10m2 stops
$284Southwest
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Thu, Jan 29 - Mon, Feb 2
Multiple Airlines Logo
12:01 pm - 9:09 pmSTL-IND
32h 08m2 stops
Multiple Airlines Logo
9:03 am - 11:57 pmIND-STL
15h 54m1 stop
$285Multiple Airlines
Find Deal
Fri, Nov 28 - Mon, Dec 1

Southwest flights from St. Louis to Indianapolis

Our best Southwest deals on St. Louis to Indianapolis flight tickets
Southwest
Dec 9
STL8:25 amLambert-St Louis
7h 35m
2 stops
IND5:00 pmIndianapolis
Dec 13
IND3:40 pmIndianapolis
5h 00m
1 stop
STL7:40 pmLambert-St Louis
$262
Find similar
Southwest
Jan 29
STL8:15 amLambert-St Louis
5h 50m
1 stop
IND3:05 pmIndianapolis
Feb 2
IND5:35 amIndianapolis
8h 10m
2 stops
STL12:45 pmLambert-St Louis
$284
Find similar
Southwest
Jan 29
STL2:15 pmLambert-St Louis
6h 50m
2 stops
IND10:05 pmIndianapolis
Feb 2
IND7:00 amIndianapolis
7h 35m
2 stops
STL1:35 pmLambert-St Louis
$289
Find similar

Frontier flights from St. Louis to Indianapolis

Our best Frontier deals on St. Louis to Indianapolis flight tickets
Frontier
Dec 15
STL10:47 amLambert-St Louis
7h 03m
1 stop
IND6:50 pmIndianapolis
Jan 9
IND8:55 pmIndianapolis
14h 07m
1 stop
STL10:02 amLambert-St Louis
$145
Find similar
Frontier
Nov 26
STL7:03 pmLambert-St Louis
22h 23m
1 stop
IND6:26 pmIndianapolis
Nov 30
IND12:59 pmIndianapolis
11h 58m
1 stop
STL11:57 pmLambert-St Louis
$277
Find similar
Frontier
Dec 29
STL4:27 pmLambert-St Louis
24h 17m
2 stops
IND5:44 pmIndianapolis
Jan 2
IND8:48 pmIndianapolis
14h 14m
1 stop
STL10:02 amLambert-St Louis
$307
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 13, 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 1/29

10:42 am-9:43 am

2 stops22h 01m

Indianapolis

Fri 1/30

3:12 pm-10:33 pm

1 stop8h 21m

$184

St. LouisIndianapolis

STL - IND

STLIND

Lambert-St Louis

Tue 12/9

3:30 pm-9:35 pm

1 stop29h 05m

Indianapolis

Sat 12/13

12:22 pm-10:33 pm

1 stop11h 11m

$237

St. LouisIndianapolis

STL - IND

STLIND

Lambert-St Louis

Wed 11/26

4:13 pm-8:08 am

1 stop14h 55m

Indianapolis

Sun 11/30

11:44 am-11:57 pm

2 stops37h 13m

$246

St. LouisIndianapolis

STL - IND

STLIND

Lambert-St Louis

Tue 1/27

7:10 am-1:23 pm

1 stop5h 13m

Indianapolis

Wed 2/4

12:10 pm-4:39 pm

1 stop5h 29m

$257

St. LouisIndianapolis

STL - IND

STLIND

Lambert-St Louis

Tue 12/9

8:25 am-5:00 pm

2 stops7h 35m

Indianapolis

Sat 12/13

3:40 pm-7:40 pm

1 stop5h 00m

$262

St. LouisIndianapolis

STL - IND

STLIND

Lambert-St Louis

Thu 1/29

6:35 am-11:30 am

1 stop3h 55m

Indianapolis

Tue 2/3

6:30 pm-11:39 pm

1 stop6h 09m

$268

St. LouisIndianapolis

STL - IND

STLIND

Lambert-St Louis

Wed 11/26

7:03 pm-6:26 pm

1 stop22h 23m

Indianapolis

Sun 11/30

12:59 pm-11:57 pm

1 stop11h 58m

$277

St. LouisIndianapolis

STL - IND

STLIND

Lambert-St Louis

Thu 1/29

6:35 am-11:30 am

1 stop3h 55m

Indianapolis

Mon 2/2

6:55 pm-11:39 pm

1 stop5h 44m

$279

St. LouisIndianapolis

STL - IND

STLIND

Lambert-St Louis

Thu 1/29

8:15 am-3:05 pm

1 stop5h 50m

Indianapolis

Mon 2/2

5:35 am-12:45 pm

2 stops8h 10m

$284

St. LouisIndianapolis

STL - IND

STLIND

Lambert-St Louis

Fri 11/28

12:01 pm-9:09 pm

2 stops32h 08m

Indianapolis

Mon 12/1

9:03 am-11:57 pm

1 stop15h 54m

$285

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, 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

Direct flights

None
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 35m, 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
11,050 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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