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Cheap flights from Indianapolis to St. Louis from $82

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Indianapolis to St. Louis departing on 4/16. 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 Indianapolis to St. Louis

Cheap round-trip flights

Enter your travel dates to find the best prices.
Frontier Logo
12:07 pm - 11:19 pm
IND
-
STL
12h 12m
1 stop
Frontier Logo
8:39 am - 3:22 pm
STL
-
IND
5h 43m
1 stop
$180Frontier
Tue, Apr 21 - Fri, Apr 24
Frontier Logo
8:46 pm - 7:32 pm
IND
-
STL
23h 46m
1 stop
Frontier Logo
9:55 pm - 12:57 pm
STL
-
IND
14h 02m
1 stop
$191Frontier
Fri, Apr 17 - Sun, Apr 19
Frontier Logo
8:23 am - 11:19 pm
IND
-
STL
15h 56m
1 stop
Frontier Logo
4:16 pm - 12:57 pm
STL
-
IND
19h 41m
1 stop
$236Frontier
Fri, Apr 17 - Sat, Apr 18
Frontier Logo
1:46 pm - 12:21 am
IND
-
STL
11h 35m
1 stop
Frontier Logo
8:08 pm - 7:54 pm
STL
-
IND
22h 46m
1 stop
$239Frontier
Thu, May 21 - Tue, May 26
Frontier Logo
12:34 pm - 6:50 am
IND
-
STL
19h 16m
1 stop
Frontier Logo
8:23 pm - 7:54 pm
STL
-
IND
22h 31m
2 stops
$254Frontier
Fri, May 1 - Mon, May 4
Frontier Logo
12:34 pm - 6:50 am
IND
-
STL
19h 16m
1 stop
Frontier Logo
8:23 pm - 7:54 pm
STL
-
IND
22h 31m
2 stops
$257Frontier
Fri, May 1 - Mon, May 4
Frontier Logo
7:03 pm - 7:02 am
IND
-
STL
12h 59m
1 stop
Frontier Logo
12:14 pm - 12:54 pm
STL
-
IND
23h 40m
1 stop
$261Frontier
Sun, Mar 29 - Mon, Mar 30
Multiple Airlines Logo
6:40 pm - 6:50 am
IND
-
STL
37h 10m
2 stops
Multiple Airlines Logo
8:23 pm - 11:17 am
STL
-
IND
13h 54m
1 stop
$263Multiple Airlines
Mon, Apr 20 - Sat, Apr 25
Frontier Logo
12:07 pm - 6:50 am
IND
-
STL
19h 43m
2 stops
Frontier Logo
8:23 pm - 11:17 am
STL
-
IND
13h 54m
1 stop
$270Frontier
Tue, Apr 21 - Sat, Apr 25
Frontier Logo
10:44 am - 10:31 am
IND
-
STL
24h 47m
2 stops
Frontier Logo
8:23 pm - 11:32 am
STL
-
IND
14h 09m
1 stop
$273Frontier
Sat, Apr 18 - Wed, Apr 22

Southwest flights from Indianapolis to St. Louis

Our best Southwest deals on Indianapolis to St. Louis flight tickets
Southwest
Apr 3
IND2:40 pmIndianapolis
1h 00m
STL2:40 pmLambert-St Louis
Apr 7
STL9:50 amLambert-St Louis
0h 55m
IND11:45 amIndianapolis
$275
Southwest
Apr 18
IND2:55 pmIndianapolis
5h 15m
1 stop
STL7:10 pmLambert-St Louis
Apr 21
STL5:35 amLambert-St Louis
6h 05m
2 stops
IND12:40 pmIndianapolis
$280
Southwest
Apr 2
IND2:40 pmIndianapolis
1h 00m
STL2:40 pmLambert-St Louis
Apr 6
STL4:55 pmLambert-St Louis
4h 40m
1 stop
IND10:35 pmIndianapolis
$285

American Airlines flights from Indianapolis to St. Louis

Our best American Airlines deals on Indianapolis to St. Louis flight tickets
American Airlines
Apr 11
IND9:40 amIndianapolis
5h 23m
1 stop
STL2:03 pmLambert-St Louis
Apr 15
STL7:05 amLambert-St Louis
8h 48m
1 stop
IND4:53 pmIndianapolis
$281
American Airlines
Apr 13
IND5:33 pmIndianapolis
5h 44m
1 stop
STL10:17 pmLambert-St Louis
Apr 15
STL7:05 amLambert-St Louis
3h 41m
1 stop
IND11:46 amIndianapolis
$287
American Airlines
Apr 6
IND6:00 amIndianapolis
7h 43m
1 stop
STL12:43 pmLambert-St Louis
Apr 13
STL5:51 amLambert-St Louis
3h 28m
1 stop
IND10:19 amIndianapolis
$325

momondo Fare Finder

 
Customize your flight search to find flights from Indianapolis to St. Louis 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 20, 2026.
Use the filters below to find and compare flights from Indianapolis to St. Louis that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip
Quickest round-trip

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Tue 4/21

12:07 pm-11:19 pm

1 stop12h 12m

Lambert-St Louis

Fri 4/24

8:39 am-3:22 pm

1 stop5h 43m

$180

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Fri 4/17

8:46 pm-7:32 pm

1 stop23h 46m

Lambert-St Louis

Sun 4/19

9:55 pm-12:57 pm

1 stop14h 02m

$191

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Fri 4/17

8:23 am-11:19 pm

1 stop15h 56m

Lambert-St Louis

Sat 4/18

4:16 pm-12:57 pm

1 stop19h 41m

$236

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Thu 5/21

1:46 pm-12:21 am

1 stop11h 35m

Lambert-St Louis

Tue 5/26

8:08 pm-7:54 pm

1 stop22h 46m

$239

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Fri 5/1

12:34 pm-6:50 am

1 stop19h 16m

Lambert-St Louis

Mon 5/4

8:23 pm-7:54 pm

2 stops22h 31m

$254

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Fri 5/1

12:34 pm-6:50 am

1 stop19h 16m

Lambert-St Louis

Mon 5/4

8:23 pm-7:54 pm

2 stops22h 31m

$257

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Sun 3/29

7:03 pm-7:02 am

1 stop12h 59m

Lambert-St Louis

Mon 3/30

12:14 pm-12:54 pm

1 stop23h 40m

$261

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Mon 4/20

6:40 pm-6:50 am

2 stops37h 10m

Lambert-St Louis

Sat 4/25

8:23 pm-11:17 am

1 stop13h 54m

$263

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Tue 4/21

12:07 pm-6:50 am

2 stops19h 43m

Lambert-St Louis

Sat 4/25

8:23 pm-11:17 am

1 stop13h 54m

$270

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Sat 4/18

10:44 am-10:31 am

2 stops24h 47m

Lambert-St Louis

Wed 4/22

8:23 pm-11:32 am

1 stop14h 09m

$273

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 St. Louis from

How to get the cheapest flight ticket from Indianapolis to St. Louis

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 St. Louis?

In general, November is the cheapest month to fly from Indianapolis to St. Louis. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $256. The month of April is another great option to travel to St. Louis, with average flight prices from Indianapolis averaging around $264.

What is the cheapest Indianapolis to Lambert-St Louis flight route?

Fly from Indianapolis to Lambert-St Louis for the best Indianapolis - Lambert-St Louis flight prices

What cabin class options are available on Indianapolis to Lambert-St Louis flights?

There is only 1 cabin class available to choose from on Indianapolis to Lambert-St Louis flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

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

As of March 2026, prices for Indianapolis to St. Louis flights are approximately 35% more expensive when compared to flights at the same time last year.

When to book flights from Indianapolis to St. Louis

Are you open to changing your travel dates? Check out the ideal times to fly from Indianapolis to St. Louis according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Indianapolis to St. Louis (IND to STL) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Indianapolis to St. Louis

Fastest flight time

3h 46m

Direct flights

Sat

Airports in St. Louis

1 airport
The fastest flight from Indianapolis to St. Louis takes 3h 46m
Direct flights go from Indianapolis to St. Louis on Saturday. There are no airlines offering direct flights.
There is 1 airport in St. Louis. From Indianapolis there are direct flights to Lambert-St Louis (STL).
Search flight deals

  • How far is Indianapolis to Lambert-St Louis by plane?

    The distance between Indianapolis and Lambert-St Louis is about 230.0 mi. Typically, this will take 3h 46m by plane in normal conditions.

  • When did momondo last update prices for flights from Indianapolis Airport to Lambert-St Louis Airport?

    Prices for flights from Indianapolis Airport to Lambert-St Louis Airport were last updated today.

  • How many operators does momondo search for flights from Indianapolis Airport to Lambert-St Louis Airport?

  • How old do you have to be to fly from Indianapolis Airport to Lambert-St Louis Airport?

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Indianapolis Airport to Lambert-St Louis Airport.

  • What documentation or ID do you need to fly to Lambert-St Louis Airport?

    The required travel and health documents for your Lambert-St Louis Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Lambert-St Louis Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

  • What is the most popular plane model from Indianapolis to St. Louis?

  • What is the most popular airline from Indianapolis to St. Louis?

Best airlines flying from Indianapolis to St. Louis

Compare and see reviews for airlines that fly from Indianapolis to St. Louis with momondo
Airline
Rating
Free Cancellation
Price
American AirlinesPriceFrom $196Free CancellationRating
7.1
11,480 reviews
Search American Airlines flights

Traveling to a place near St. Louis?

Book flights to St. Louis if you plan to visit one of these locations
St. Charles
Chesterfield
Hermann
Fairview Heights
Florissant
Maryland Heights
O'Fallon
Collinsville
Alton
St. Peters
Wentzville
Fenton
Farmington
Clayton
Edwardsville
Festus
Eureka
Litchfield
Shrewsbury
Grafton

Why use momondo?

Why should I use momondo to find a flight deal from Indianapolis to St. Louis?

It is quick and easy to find Indianapolis to St. Louis flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to St. Louis that suits you.

Can I find flights from Indianapolis to St. Louis with flexible booking policies on momondo?

Yes. momondo enables you to select and highlight flights to St. Louis from Indianapolis with this policy.

How can momondo help me find flights from Indianapolis to St. Louis?

momondo helps you find the best flight between Indianapolis and St. Louis by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

I’m not ready to book a flight from Indianapolis to St. Louis right now. Can momondo alert me if prices change?

Of course. momondo tracks the price of Indianapolis to St. Louis flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

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