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Cheap flights from Indianapolis to St. Louis from $67

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 3/1. 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.
Multiple Airlines Logo
3:12 pm - 6:51 am
IND
-
STL
16h 39m
2 stops
Multiple Airlines Logo
3:49 pm - 9:21 am
STL
-
IND
16h 32m
1 stop
$220Multiple Airlines
Tue, Mar 3 - Thu, Mar 5
Frontier Logo
9:13 pm - 10:27 pm
IND
-
STL
26h 14m
1 stop
Frontier Logo
8:17 pm - 6:34 pm
STL
-
IND
21h 17m
1 stop
$239Frontier
Tue, Feb 17 - Sat, Feb 21
Multiple Airlines Logo
3:12 pm - 6:51 am
IND
-
STL
16h 39m
2 stops
Multiple Airlines Logo
8:17 pm - 6:34 pm
STL
-
IND
21h 17m
1 stop
$246Multiple Airlines
Tue, Feb 17 - Sat, Feb 21
Frontier Logo
12:16 pm - 1:34 pm
IND
-
STL
26h 18m
1 stop
Frontier Logo
11:21 am - 11:22 am
STL
-
IND
23h 01m
1 stop
$251Frontier
Thu, Mar 19 - Thu, Mar 26
Multiple Airlines Logo
8:33 pm - 9:49 am
IND
-
STL
14h 16m
1 stop
Multiple Airlines Logo
7:52 am - 10:48 pm
STL
-
IND
13h 56m
2 stops
$274Multiple Airlines
Fri, Mar 6 - Sun, Mar 8
Multiple Airlines Logo
8:33 pm - 9:49 am
IND
-
STL
14h 16m
1 stop
Multiple Airlines Logo
4:51 pm - 8:32 am
STL
-
IND
14h 41m
1 stop
$283Multiple Airlines
Fri, Mar 6 - Sun, Mar 8
United Airlines Logo
4:05 pm - 9:05 pm
IND
-
STL
6h 00m
1 stop
United Airlines Logo
7:41 am - 3:06 pm
STL
-
IND
6h 25m
1 stop
$286United Airlines
Tue, Mar 3 - Thu, Mar 5
Frontier Logo
12:16 pm - 7:22 am
IND
-
STL
20h 06m
2 stops
Frontier Logo
11:21 am - 11:22 am
STL
-
IND
23h 01m
1 stop
$302Frontier
Thu, Mar 19 - Thu, Mar 26
Southwest Logo
8:30 am - 5:30 pm
IND
-
STL
10h 00m
2 stops
Southwest Logo
2:15 pm - 10:35 pm
STL
-
IND
7h 20m
2 stops
$306Southwest
Tue, Mar 3 - Thu, Mar 5
Delta Logo
7:10 am - 12:54 pm
IND
-
STL
6h 44m
1 stop
Delta Logo
5:30 pm - 12:34 am
STL
-
IND
6h 04m
1 stop
$316Delta
Tue, Jul 28 - Fri, Jul 31

Frontier flights from Indianapolis to St. Louis

Our best Frontier deals on Indianapolis to St. Louis flight tickets
Frontier
Feb 13
IND7:41 pmIndianapolis
12h 10m
1 stop
STL6:51 amLambert-St Louis
Feb 14
STL8:17 pmLambert-St Louis
18h 37m
2 stops
IND3:54 pmIndianapolis
$217
Frontier
Feb 17
IND9:13 pmIndianapolis
26h 14m
1 stop
STL10:27 pmLambert-St Louis
Feb 21
STL8:17 pmLambert-St Louis
21h 17m
1 stop
IND6:34 pmIndianapolis
$239
Frontier
Feb 13
IND7:41 pmIndianapolis
12h 10m
1 stop
STL6:51 amLambert-St Louis
Feb 14
STL2:51 pmLambert-St Louis
28h 06m
1 stop
IND7:57 pmIndianapolis
$247

United Airlines flights from Indianapolis to St. Louis

Our best United Airlines deals on Indianapolis to St. Louis flight tickets
United Airlines
Mar 3
IND4:05 pmIndianapolis
6h 00m
1 stop
STL9:05 pmLambert-St Louis
Mar 5
STL7:41 amLambert-St Louis
6h 25m
1 stop
IND3:06 pmIndianapolis
$286
United Airlines
Mar 2
IND4:05 pmIndianapolis
6h 00m
1 stop
STL9:05 pmLambert-St Louis
Mar 4
STL6:25 amLambert-St Louis
4h 01m
1 stop
IND11:26 amIndianapolis
$356
United Airlines
Jul 28
IND10:10 amIndianapolis
12h 01m
2 stops
STL9:11 pmLambert-St Louis
Jul 31
STL1:13 pmLambert-St Louis
6h 00m
1 stop
IND8:13 pmIndianapolis
$469

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 February 4, 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

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Tue 3/3

3:12 pm-6:51 am

2 stops16h 39m

Lambert-St Louis

Thu 3/5

3:49 pm-9:21 am

1 stop16h 32m

$220

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Tue 2/17

9:13 pm-10:27 pm

1 stop26h 14m

Lambert-St Louis

Sat 2/21

8:17 pm-6:34 pm

1 stop21h 17m

$239

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Tue 2/17

3:12 pm-6:51 am

2 stops16h 39m

Lambert-St Louis

Sat 2/21

8:17 pm-6:34 pm

1 stop21h 17m

$246

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Thu 3/19

12:16 pm-1:34 pm

1 stop26h 18m

Lambert-St Louis

Thu 3/26

11:21 am-11:22 am

1 stop23h 01m

$251

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Fri 3/6

8:33 pm-9:49 am

1 stop14h 16m

Lambert-St Louis

Sun 3/8

7:52 am-10:48 pm

2 stops13h 56m

$274

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Fri 3/6

8:33 pm-9:49 am

1 stop14h 16m

Lambert-St Louis

Sun 3/8

4:51 pm-8:32 am

1 stop14h 41m

$283

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Tue 3/3

4:05 pm-9:05 pm

1 stop6h 00m

Lambert-St Louis

Thu 3/5

7:41 am-3:06 pm

1 stop6h 25m

$286

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Thu 3/19

12:16 pm-7:22 am

2 stops20h 06m

Lambert-St Louis

Thu 3/26

11:21 am-11:22 am

1 stop23h 01m

$302

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Tue 3/3

8:30 am-5:30 pm

2 stops10h 00m

Lambert-St Louis

Thu 3/5

2:15 pm-10:35 pm

2 stops7h 20m

$306

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Tue 7/28

7:10 am-12:54 pm

1 stop6h 44m

Lambert-St Louis

Fri 7/31

5:30 pm-12:34 am

1 stop6h 04m

$316

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 $289.

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

As of February 2026, prices for Indianapolis to St. Louis flights are approximately 4% cheaper 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

5h 06m

Direct flights

Fri

Airports in St. Louis

1 airport
The fastest flight from Indianapolis to St. Louis takes 5h 06m
Direct flights go from Indianapolis to St. Louis on Friday. 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 5h 06m 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 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
7.2
11,216 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
Maryland Heights
Florissant
O'Fallon
Collinsville
St. Peters
Fenton
Wentzville
Alton
Farmington
Clayton
Edwardsville
Eureka
Festus
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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