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Cheap flights from Indianapolis to St. Louis from $64

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 3/5. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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
7:31 pm - 6:51 am
IND
-
STL
12h 20m
1 stop
Frontier Logo
8:17 pm - 6:31 pm
STL
-
IND
21h 14m
1 stop
$139Frontier
Sun, Feb 22 - Wed, Feb 25
Frontier Logo
12:16 pm - 1:34 pm
IND
-
STL
26h 18m
1 stop
Frontier Logo
8:10 pm - 8:39 am
STL
-
IND
11h 29m
1 stop
$188Frontier
Thu, Mar 12 - Mon, Mar 16
Multiple Airlines Logo
7:41 pm - 6:51 am
IND
-
STL
12h 10m
1 stop
Multiple Airlines Logo
8:22 pm - 2:17 pm
STL
-
IND
16h 55m
2 stops
$197Multiple Airlines
Fri, Feb 20 - Mon, Feb 23
Multiple Airlines Logo
7:41 pm - 6:51 am
IND
-
STL
12h 10m
1 stop
Multiple Airlines Logo
8:22 pm - 2:17 pm
STL
-
IND
16h 55m
2 stops
$207Multiple Airlines
Fri, Feb 20 - Mon, Feb 23
Multiple Airlines Logo
7:31 pm - 6:51 am
IND
-
STL
12h 20m
1 stop
Multiple Airlines Logo
8:17 pm - 7:23 pm
STL
-
IND
22h 06m
2 stops
$210Multiple Airlines
Sun, Feb 22 - Wed, Feb 25
Frontier Logo
6:10 pm - 6:51 am
IND
-
STL
37h 41m
2 stops
Frontier Logo
8:17 pm - 6:31 pm
STL
-
IND
21h 14m
1 stop
$213Frontier
Mon, Feb 23 - Wed, Feb 25
Frontier Logo
7:27 pm - 6:51 am
IND
-
STL
12h 24m
1 stop
Frontier Logo
8:12 pm - 7:38 pm
STL
-
IND
22h 26m
1 stop
$233Frontier
Thu, Feb 19 - Fri, Mar 13
Frontier Logo
5:59 pm - 11:59 pm
IND
-
STL
7h 00m
1 stop
Frontier Logo
8:12 pm - 7:38 pm
STL
-
IND
22h 26m
1 stop
$234Frontier
Thu, Mar 5 - Fri, Mar 6
Frontier Logo
12:16 pm - 7:22 am
IND
-
STL
20h 06m
2 stops
Frontier Logo
8:10 pm - 8:39 am
STL
-
IND
11h 29m
1 stop
$236Frontier
Thu, Mar 12 - Mon, Mar 16
Multiple Airlines Logo
7:27 pm - 6:51 am
IND
-
STL
12h 24m
1 stop
Multiple Airlines Logo
8:22 pm - 12:14 pm
STL
-
IND
14h 52m
2 stops
$265Multiple Airlines
Thu, Feb 26 - Fri, Feb 27

Frontier flights from Indianapolis to St. Louis

Our best Frontier deals on Indianapolis to St. Louis flight tickets
Frontier
Feb 22
IND7:31 pmIndianapolis
12h 20m
1 stop
STL6:51 amLambert-St Louis
Feb 25
STL8:17 pmLambert-St Louis
21h 14m
1 stop
IND6:31 pmIndianapolis
$139
Frontier
Mar 12
IND12:16 pmIndianapolis
26h 18m
1 stop
STL1:34 pmLambert-St Louis
Mar 16
STL8:10 pmLambert-St Louis
11h 29m
1 stop
IND8:39 amIndianapolis
$188
Frontier
Feb 23
IND6:10 pmIndianapolis
37h 41m
2 stops
STL6:51 amLambert-St Louis
Feb 25
STL8:17 pmLambert-St Louis
21h 14m
1 stop
IND6:31 pmIndianapolis
$213

United Airlines flights from Indianapolis to St. Louis

Our best United Airlines deals on Indianapolis to St. Louis flight tickets
United Airlines
Mar 2
IND6:10 pmIndianapolis
5h 49m
1 stop
STL10:59 pmLambert-St Louis
Mar 4
STL7:41 amLambert-St Louis
4h 30m
1 stop
IND1:11 pmIndianapolis
$327
United Airlines
Apr 3
IND9:24 amIndianapolis
3h 58m
1 stop
STL12:22 pmLambert-St Louis
Apr 3
STL6:35 pmLambert-St Louis
5h 19m
1 stop
IND12:54 amIndianapolis
$334
United Airlines
Mar 29
IND7:45 pmIndianapolis
4h 11m
1 stop
STL10:56 pmLambert-St Louis
Apr 3
STL11:15 amLambert-St Louis
5h 33m
1 stop
IND5:48 pmIndianapolis
$346

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 9, 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

Sun 2/22

7:31 pm-6:51 am

1 stop12h 20m

Lambert-St Louis

Wed 2/25

8:17 pm-6:31 pm

1 stop21h 14m

$139

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Thu 3/12

12:16 pm-1:34 pm

1 stop26h 18m

Lambert-St Louis

Mon 3/16

8:10 pm-8:39 am

1 stop11h 29m

$188

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Fri 2/20

7:41 pm-6:51 am

1 stop12h 10m

Lambert-St Louis

Mon 2/23

8:22 pm-2:17 pm

2 stops16h 55m

$197

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Fri 2/20

7:41 pm-6:51 am

1 stop12h 10m

Lambert-St Louis

Mon 2/23

8:22 pm-2:17 pm

2 stops16h 55m

$207

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Sun 2/22

7:31 pm-6:51 am

1 stop12h 20m

Lambert-St Louis

Wed 2/25

8:17 pm-7:23 pm

2 stops22h 06m

$210

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Mon 2/23

6:10 pm-6:51 am

2 stops37h 41m

Lambert-St Louis

Wed 2/25

8:17 pm-6:31 pm

1 stop21h 14m

$213

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Thu 2/19

7:27 pm-6:51 am

1 stop12h 24m

Lambert-St Louis

Fri 3/13

8:12 pm-7:38 pm

1 stop22h 26m

$233

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Thu 3/5

5:59 pm-11:59 pm

1 stop7h 00m

Lambert-St Louis

Fri 3/6

8:12 pm-7:38 pm

1 stop22h 26m

$234

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Thu 3/12

12:16 pm-7:22 am

2 stops20h 06m

Lambert-St Louis

Mon 3/16

8:10 pm-8:39 am

1 stop11h 29m

$236

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Thu 2/26

7:27 pm-6:51 am

1 stop12h 24m

Lambert-St Louis

Fri 2/27

8:22 pm-12:14 pm

2 stops14h 52m

$265

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 January is another great option to travel to St. Louis, with average flight prices from Indianapolis averaging around $265.

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

As of February 2026, prices for Indianapolis to St. Louis flights are approximately 2% 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

Mon, Wed 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 Monday, Wednesday 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 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
11,254 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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