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Cheap flights from St. Louis to Indianapolis from $85

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 12/10. 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.
Delta Logo
7:30 am - 3:11 pmSTL-IND
6h 41m1 stop
Delta Logo
7:50 pm - 11:10 pmIND-STL
4h 20m1 stop
$209Delta
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Sat, Feb 28 - Tue, Mar 3
Southwest Logo
6:55 am - 11:55 amSTL-IND
4h 00m1 stop
Southwest Logo
7:40 pm - 11:15 pmIND-STL
4h 35m1 stop
$237Southwest
Find Deal
Sat, Nov 22 - Mon, Nov 24
Multiple Airlines Logo
7:45 pm - 7:44 pmSTL-IND
22h 59m1 stop
Multiple Airlines Logo
7:00 am - 5:16 pmIND-STL
11h 16m1 stop
$243Multiple Airlines
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Wed, Nov 5 - Sun, Nov 9
Southwest Logo
9:40 am - 4:25 pmSTL-IND
5h 45m1 stop
Southwest Logo
6:15 pm - 11:50 pmIND-STL
6h 35m1 stop
$256Southwest
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Wed, Dec 17 - Sat, Dec 20
Frontier Logo
7:45 pm - 7:44 pmSTL-IND
22h 59m1 stop
Frontier Logo
9:49 am - 9:07 amIND-STL
24h 18m2 stops
$257Frontier
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Wed, Nov 5 - Sun, Nov 9
Frontier Logo
7:43 pm - 7:53 pmSTL-IND
23h 10m1 stop
Frontier Logo
6:47 pm - 10:33 pmIND-STL
28h 46m2 stops
$268Frontier
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Fri, Dec 19 - Mon, Jan 5
Multiple Airlines Logo
9:52 am - 11:19 pmSTL-IND
12h 27m1 stop
Multiple Airlines Logo
5:00 am - 6:19 pmIND-STL
14h 19m2 stops
$278Multiple Airlines
Find Deal
Sat, Nov 22 - Mon, Nov 24
American Airlines Logo
5:00 am - 1:11 pmSTL-IND
7h 11m1 stop
American Airlines Logo
7:00 pm - 11:07 pmIND-STL
5h 07m1 stop
$327American Airlines
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Sat, Nov 8 - Tue, Nov 11
United Airlines Logo
11:05 am - 3:43 pmSTL-IND
3h 38m1 stop
United Airlines Logo
9:28 am - 12:28 pmIND-STL
4h 00m1 stop
$397United Airlines
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Wed, Nov 5 - Thu, Nov 6
United Airlines Logo
6:30 am - 11:13 amSTL-IND
3h 43m1 stop
United Airlines Logo
6:32 pm - 11:44 pmIND-STL
6h 12m1 stop
$457United Airlines
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Thu, Nov 6 - Mon, Nov 10

Frontier flights from St. Louis to Indianapolis

Our best Frontier deals on St. Louis to Indianapolis flight tickets
Frontier
Nov 5
STL7:45 pmLambert-St Louis
22h 59m
1 stop
IND7:44 pmIndianapolis
Nov 9
IND9:49 amIndianapolis
24h 18m
2 stops
STL9:07 amLambert-St Louis
$257
Find similar
Frontier
Dec 19
STL7:43 pmLambert-St Louis
23h 10m
1 stop
IND7:53 pmIndianapolis
Jan 5
IND6:47 pmIndianapolis
28h 46m
2 stops
STL10:33 pmLambert-St Louis
$268
Find similar
Frontier
Nov 19
STL7:45 pmLambert-St Louis
21h 41m
2 stops
IND6:26 pmIndianapolis
Nov 23
IND9:55 pmIndianapolis
21h 24m
1 stop
STL6:19 pmLambert-St Louis
$271
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Southwest flights from St. Louis to Indianapolis

Our best Southwest deals on St. Louis to Indianapolis flight tickets
Southwest
Nov 22
STL6:55 amLambert-St Louis
4h 00m
1 stop
IND11:55 amIndianapolis
Nov 24
IND7:40 pmIndianapolis
4h 35m
1 stop
STL11:15 pmLambert-St Louis
$237
Find similar
Southwest
Dec 17
STL9:40 amLambert-St Louis
5h 45m
1 stop
IND4:25 pmIndianapolis
Dec 20
IND6:15 pmIndianapolis
6h 35m
1 stop
STL11:50 pmLambert-St Louis
$256
Find similar
Southwest
Dec 17
STL8:25 amLambert-St Louis
7h 35m
2 stops
IND5:00 pmIndianapolis
Dec 20
IND12:20 pmIndianapolis
8h 50m
2 stops
STL8:10 pmLambert-St Louis
$375
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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 October 23, 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

Sat 2/28

7:30 am-3:11 pm

1 stop6h 41m

Indianapolis

Tue 3/3

7:50 pm-11:10 pm

1 stop4h 20m

$209

St. LouisIndianapolis

STL - IND

STLIND

Lambert-St Louis

Sat 11/22

6:55 am-11:55 am

1 stop4h 00m

Indianapolis

Mon 11/24

7:40 pm-11:15 pm

1 stop4h 35m

$237

St. LouisIndianapolis

STL - IND

STLIND

Lambert-St Louis

Wed 11/5

7:45 pm-7:44 pm

1 stop22h 59m

Indianapolis

Sun 11/9

7:00 am-5:16 pm

1 stop11h 16m

$243

St. LouisIndianapolis

STL - IND

STLIND

Lambert-St Louis

Wed 12/17

9:40 am-4:25 pm

1 stop5h 45m

Indianapolis

Sat 12/20

6:15 pm-11:50 pm

1 stop6h 35m

$256

St. LouisIndianapolis

STL - IND

STLIND

Lambert-St Louis

Wed 11/5

7:45 pm-7:44 pm

1 stop22h 59m

Indianapolis

Sun 11/9

9:49 am-9:07 am

2 stops24h 18m

$257

St. LouisIndianapolis

STL - IND

STLIND

Lambert-St Louis

Fri 12/19

7:43 pm-7:53 pm

1 stop23h 10m

Indianapolis

Mon 1/5

6:47 pm-10:33 pm

2 stops28h 46m

$268

St. LouisIndianapolis

STL - IND

STLIND

Lambert-St Louis

Sat 11/22

9:52 am-11:19 pm

1 stop12h 27m

Indianapolis

Mon 11/24

5:00 am-6:19 pm

2 stops14h 19m

$278

St. LouisIndianapolis

STL - IND

STLIND

Lambert-St Louis

Sat 11/8

5:00 am-1:11 pm

1 stop7h 11m

Indianapolis

Tue 11/11

7:00 pm-11:07 pm

1 stop5h 07m

$327

St. LouisIndianapolis

STL - IND

STLIND

Lambert-St Louis

Wed 11/5

11:05 am-3:43 pm

1 stop3h 38m

Indianapolis

Thu 11/6

9:28 am-12:28 pm

1 stop4h 00m

$397

St. LouisIndianapolis

STL - IND

STLIND

Lambert-St Louis

Thu 11/6

6:30 am-11:13 am

1 stop3h 43m

Indianapolis

Mon 11/10

6:32 pm-11:44 pm

1 stop6h 12m

$457

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 October 2025, prices for St. Louis to Indianapolis flights are approximately 63% 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 38m, 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
11,032 reviews
Search American Airlines flights
DeltaPriceFrom $234Free CancellationRating
7.9
7,982 reviews
Search Delta 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
Crawfordsville
Brownsburg
Speedway
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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