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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
8:46 pm - 7:32 pm
IND
-
STL
23h 46m
1 stop
Frontier Logo
11:25 am - 10:32 am
STL
-
IND
22h 07m
1 stop
$188Frontier
Fri, Apr 17 - Thu, Apr 23
Frontier Logo
8:27 pm - 9:48 am
IND
-
STL
14h 21m
1 stop
Frontier Logo
9:55 pm - 12:57 pm
STL
-
IND
14h 02m
1 stop
$189Frontier
Thu, Apr 9 - Thu, Apr 16
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 - Thu, Apr 23
Multiple Airlines Logo
8:46 pm - 7:32 pm
IND
-
STL
23h 46m
1 stop
Multiple Airlines Logo
11:25 am - 7:38 am
STL
-
IND
19h 13m
2 stops
$238Multiple Airlines
Fri, Apr 17 - Thu, Apr 23
Frontier Logo
8:38 am - 11:19 pm
IND
-
STL
15h 41m
1 stop
Frontier Logo
8:39 am - 3:22 pm
STL
-
IND
5h 43m
1 stop
$244Frontier
Mon, Apr 20 - Fri, Apr 24
Frontier Logo
11:12 am - 11:19 pm
IND
-
STL
13h 07m
1 stop
Frontier Logo
9:55 pm - 12:57 pm
STL
-
IND
14h 02m
1 stop
$246Frontier
Thu, Apr 16 - Sun, Apr 19
Frontier Logo
8:27 pm - 9:48 am
IND
-
STL
14h 21m
1 stop
Frontier Logo
8:16 pm - 7:32 pm
STL
-
IND
22h 16m
1 stop
$264Frontier
Thu, Apr 9 - Fri, Apr 10
Multiple Airlines Logo
5:08 pm - 11:25 pm
IND
-
STL
7h 17m
1 stop
Multiple Airlines Logo
8:23 pm - 11:17 am
STL
-
IND
13h 54m
1 stop
$274Multiple Airlines
Sat, Apr 11 - Sat, Apr 18
Southwest Logo
6:35 pm - 11:15 pm
IND
-
STL
5h 40m
1 stop
Southwest Logo
8:50 am - 4:40 pm
STL
-
IND
6h 50m
1 stop
$277Southwest
Thu, May 14 - Sat, May 16
Frontier Logo
8:27 pm - 7:51 am
IND
-
STL
36h 24m
2 stops
Frontier Logo
8:23 pm - 11:17 am
STL
-
IND
13h 54m
1 stop
$278Frontier
Sat, Apr 11 - Sat, Apr 18

Delta flights from Indianapolis to St. Louis

Our best Delta deals on Indianapolis to St. Louis flight tickets
Delta
Apr 18
IND6:13 amIndianapolis
4h 35m
1 stop
STL9:48 amLambert-St Louis
Apr 20
STL5:59 pmLambert-St Louis
5h 08m
1 stop
IND12:07 amIndianapolis
$307
Delta
Jun 18
IND8:00 amIndianapolis
6h 17m
1 stop
STL1:17 pmLambert-St Louis
Jun 21
STL6:45 amLambert-St Louis
5h 43m
1 stop
IND1:28 pmIndianapolis
$337
Delta
Apr 30
IND6:13 amIndianapolis
4h 29m
1 stop
STL9:42 amLambert-St Louis
Jun 14
STL6:45 amLambert-St Louis
5h 43m
1 stop
IND1:28 pmIndianapolis
$338

Frontier flights from Indianapolis to St. Louis

Our best Frontier deals on Indianapolis to St. Louis flight tickets
Frontier
Apr 17
IND8:46 pmIndianapolis
23h 46m
1 stop
STL7:32 pmLambert-St Louis
Apr 23
STL11:25 amLambert-St Louis
22h 07m
1 stop
IND10:32 amIndianapolis
$188
Frontier
Apr 9
IND8:27 pmIndianapolis
14h 21m
1 stop
STL9:48 amLambert-St Louis
Apr 16
STL9:55 pmLambert-St Louis
14h 02m
1 stop
IND12:57 pmIndianapolis
$189
Frontier
Apr 17
IND8:46 pmIndianapolis
23h 46m
1 stop
STL7:32 pmLambert-St Louis
Apr 23
STL9:55 pmLambert-St Louis
14h 02m
1 stop
IND12:57 pmIndianapolis
$191

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 15, 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

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Fri 4/17

8:46 pm-7:32 pm

1 stop23h 46m

Lambert-St Louis

Thu 4/23

11:25 am-10:32 am

1 stop22h 07m

$188

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Thu 4/9

8:27 pm-9:48 am

1 stop14h 21m

Lambert-St Louis

Thu 4/16

9:55 pm-12:57 pm

1 stop14h 02m

$189

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Fri 4/17

8:46 pm-7:32 pm

1 stop23h 46m

Lambert-St Louis

Thu 4/23

9:55 pm-12:57 pm

1 stop14h 02m

$191

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Fri 4/17

8:46 pm-7:32 pm

1 stop23h 46m

Lambert-St Louis

Thu 4/23

11:25 am-7:38 am

2 stops19h 13m

$238

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Mon 4/20

8:38 am-11:19 pm

1 stop15h 41m

Lambert-St Louis

Fri 4/24

8:39 am-3:22 pm

1 stop5h 43m

$244

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Thu 4/16

11:12 am-11:19 pm

1 stop13h 07m

Lambert-St Louis

Sun 4/19

9:55 pm-12:57 pm

1 stop14h 02m

$246

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Thu 4/9

8:27 pm-9:48 am

1 stop14h 21m

Lambert-St Louis

Fri 4/10

8:16 pm-7:32 pm

1 stop22h 16m

$264

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Sat 4/11

5:08 pm-11:25 pm

1 stop7h 17m

Lambert-St Louis

Sat 4/18

8:23 pm-11:17 am

1 stop13h 54m

$274
Quickest round-trip

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Thu 5/14

6:35 pm-11:15 pm

1 stop5h 40m

Lambert-St Louis

Sat 5/16

8:50 am-4:40 pm

1 stop6h 50m

$277

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Sat 4/11

8:27 pm-7:51 am

2 stops36h 24m

Lambert-St Louis

Sat 4/18

8:23 pm-11:17 am

1 stop13h 54m

$278

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

1h 00m

Direct flights

Fri and Sat

Airports in St. Louis

1 airport
The fastest flight from Indianapolis to St. Louis takes 1h 00m
Direct flights go from Indianapolis to St. Louis on Friday and 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 1h 00m 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
11,466 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
St. Peters
Fenton
Alton
Wentzville
Farmington
Edwardsville
Festus
Clayton
Eureka
Litchfield
Glencoe
Shrewsbury

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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