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Cheap flights from Indianapolis to St. Louis from $72

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 11/7. 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 Indianapolis to St. Louis

Cheap round-trip flights

Frontier Logo
8:51 pm - 9:07 amIND-STL
13h 16m1 stop
Frontier Logo
8:40 pm - 7:44 pmSTL-IND
22h 04m1 stop
$154Frontier
Find Deal
Thu, Oct 23 - Thu, Oct 30
Frontier Logo
12:17 pm - 3:57 pmIND-STL
4h 40m1 stop
Frontier Logo
2:12 pm - 9:19 pmSTL-IND
6h 07m1 stop
$155Frontier
Find Deal
Fri, Oct 31 - Mon, Nov 3
Multiple Airlines Logo
6:00 am - 10:16 amIND-STL
29h 16m2 stops
Multiple Airlines Logo
10:57 am - 9:48 amSTL-IND
21h 51m1 stop
$234Multiple Airlines
Find Deal
Thu, Oct 23 - Thu, Oct 30
Delta Logo
7:00 am - 10:26 amIND-STL
4h 26m1 stop
Delta Logo
3:30 pm - 11:29 pmSTL-IND
6h 59m1 stop
$237Delta
Find Deal
Tue, Oct 7 - Tue, Oct 14
Multiple Airlines Logo
6:20 pm - 10:02 amIND-STL
16h 42m1 stop
Multiple Airlines Logo
7:52 pm - 5:35 pmSTL-IND
20h 43m2 stops
$244Multiple Airlines
Find Deal
Wed, Oct 15 - Wed, Oct 22
Delta Logo
6:51 pm - 10:04 pmIND-STL
4h 13m1 stop
Delta Logo
6:00 am - 11:33 amSTL-IND
4h 33m1 stop
$257Delta
Find Deal
Sat, Oct 11 - Sat, Oct 18
Southwest Logo
6:10 am - 2:45 pmIND-STL
9h 35m2 stops
Southwest Logo
8:25 am - 4:25 pmSTL-IND
7h 00m2 stops
$318Southwest
Find Deal
Fri, Oct 31 - Mon, Nov 3
Southwest Logo
7:35 am - 2:20 pmIND-STL
7h 45m2 stops
Southwest Logo
3:50 pm - 12:05 amSTL-IND
7h 15m2 stops
$327Southwest
Find Deal
Thu, Oct 23 - Thu, Oct 30
United Airlines Logo
6:15 am - 10:48 amIND-STL
5h 33m1 stop
United Airlines Logo
6:00 am - 1:54 pmSTL-IND
6h 54m1 stop
$457United Airlines
Find Deal
Tue, Sep 30 - Sat, Oct 4
United Airlines Logo
6:15 am - 2:27 pmIND-STL
9h 12m2 stops
United Airlines Logo
6:30 am - 1:22 pmSTL-IND
5h 52m1 stop
$624United Airlines
Find Deal
Sat, Oct 11 - Sat, Oct 18

Frontier flights from Indianapolis to St. Louis

Our best Frontier deals on Indianapolis to St. Louis flight tickets
Frontier
Oct 23
IND8:51 pmIndianapolis
13h 16m
1 stop
STL9:07 amLambert-St Louis
Oct 30
STL8:40 pmLambert-St Louis
22h 04m
1 stop
IND7:44 pmIndianapolis
$154
Find similar
Frontier
Oct 31
IND12:17 pmIndianapolis
4h 40m
1 stop
STL3:57 pmLambert-St Louis
Nov 3
STL2:12 pmLambert-St Louis
6h 07m
1 stop
IND9:19 pmIndianapolis
$155
Find similar
Frontier
Oct 15
IND5:24 pmIndianapolis
16h 43m
1 stop
STL9:07 amLambert-St Louis
Oct 22
STL7:52 pmLambert-St Louis
22h 32m
1 stop
IND7:24 pmIndianapolis
$156
Find similar

Delta flights from Indianapolis to St. Louis

Our best Delta deals on Indianapolis to St. Louis flight tickets
Delta
Oct 7
IND7:00 amIndianapolis
4h 26m
1 stop
STL10:26 amLambert-St Louis
Oct 14
STL3:30 pmLambert-St Louis
6h 59m
1 stop
IND11:29 pmIndianapolis
$237
Find similar
Delta
Oct 11
IND6:51 pmIndianapolis
4h 13m
1 stop
STL10:04 pmLambert-St Louis
Oct 18
STL6:00 amLambert-St Louis
4h 33m
1 stop
IND11:33 amIndianapolis
$257
Find similar
Delta
Oct 17
IND8:08 pmIndianapolis
3h 59m
1 stop
STL11:07 pmLambert-St Louis
Oct 20
STL6:14 pmLambert-St Louis
4h 45m
1 stop
IND11:59 pmIndianapolis
$268
Find similar

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 September 17, 2025.
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

Thu 10/23

8:51 pm-9:07 am

1 stop13h 16m

Lambert-St Louis

Thu 10/30

8:40 pm-7:44 pm

1 stop22h 04m

$154

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Fri 10/31

12:17 pm-3:57 pm

1 stop4h 40m

Lambert-St Louis

Mon 11/3

2:12 pm-9:19 pm

1 stop6h 07m

$155

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Thu 10/23

6:00 am-10:16 am

2 stops29h 16m

Lambert-St Louis

Thu 10/30

10:57 am-9:48 am

1 stop21h 51m

$234

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Tue 10/7

7:00 am-10:26 am

1 stop4h 26m

Lambert-St Louis

Tue 10/14

3:30 pm-11:29 pm

1 stop6h 59m

$237

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Wed 10/15

6:20 pm-10:02 am

1 stop16h 42m

Lambert-St Louis

Wed 10/22

7:52 pm-5:35 pm

2 stops20h 43m

$244

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Sat 10/11

6:51 pm-10:04 pm

1 stop4h 13m

Lambert-St Louis

Sat 10/18

6:00 am-11:33 am

1 stop4h 33m

$257

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Fri 10/31

6:10 am-2:45 pm

2 stops9h 35m

Lambert-St Louis

Mon 11/3

8:25 am-4:25 pm

2 stops7h 00m

$318

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Thu 10/23

7:35 am-2:20 pm

2 stops7h 45m

Lambert-St Louis

Thu 10/30

3:50 pm-12:05 am

2 stops7h 15m

$327

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Tue 9/30

6:15 am-10:48 am

1 stop5h 33m

Lambert-St Louis

Sat 10/4

6:00 am-1:54 pm

1 stop6h 54m

$457

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Sat 10/11

6:15 am-2:27 pm

2 stops9h 12m

Lambert-St Louis

Sat 10/18

6:30 am-1:22 pm

1 stop5h 52m

$624

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 typical price of a round-trip flight between Indianapolis and St. Louis?

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 $266. The month of April is another great option to travel to St. Louis, with average flight prices from Indianapolis averaging around $289.

What is the cheapest day to depart on your flight to St. Louis?

The cheapest day to depart on your flight to St. Louis is on a Tuesday when prices can be found for as low as $265. This is often the case because there is less demand to fly during this day of the week. If your travel schedule is flexible, try to avoid departing on a Monday because tickets tend to average around $392. These prices are subject to change though, so be sure to set up a Price Alert for flights to St. Louis.

What is the cheapest time of day to depart on your flight to St. Louis?

Flying to St. Louis from Indianapolis in the evening is the least expensive time of day to depart. momondo users have found prices as low as $291 when looking at flights departing in the evening. At noon is when there is more demand to fly to St. Louis, so prices are often more expensive at around $345 per ticket.

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

As of September 2025, prices for Indianapolis to St. Louis flights are approximately 2% 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

Direct flights

None
There are no direct flights from Indianapolis to St. Louis. There are no popular flight routes from Indianapolis to St. Louis.
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 05m 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 $248Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
DeltaPriceFrom $266Free CancellationRating
7.9
7,961 reviews
Search Delta 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
Fenton
Collinsville
Wentzville
Alton
St. Peters
Farmington
Festus
Glencoe
Clayton
Edwardsville
Eureka
Litchfield
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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