What is the cheapest airline that flies from Indianapolis to Lambert-St Louis?

Frontier, American Airlines, and Southwest are the most popular carriers operating from Indianapolis to Lambert-St Louis

What airlines fly to St. Louis?

American Airlines, United Airlines and Delta are the top three most popular airlines that fly to St. Louis from Indianapolis according to our data. American Airlines is the first choice among our users, with 53% of people opting to fly with this airline when traveling to St. Louis. Keep in mind that there are 5 different airlines that fly to St. Louis on a routine basis, so you have a few additional options to choose from.

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?

As of August 2025, there are 3 operators available to choose from 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.

$88 Cheap Flights from Indianapolis to St. Louis in 2025

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Find the cheapest flights from Indianapolis to St. Louis

Round-trip

One-way

Last minute

Cheap round-trip flights

8:58 pm - 9:06 amIND-STL

13h 08m1 stop

10:39 am - 6:27 pmSTL-IND

6h 48m1 stop

$163Frontier

Find Deal

Fri, Sep 26 - Sun, Sep 28

9:36 am - 1:09 pmIND-STL

4h 33m1 stop

6:29 am - 12:23 pmSTL-IND

4h 54m1 stop

$175American Airlines

Find Deal

Wed, Sep 10 - Wed, Sep 17

6:51 pm - 10:00 pmIND-STL

4h 09m1 stop

5:11 pm - 10:04 pmSTL-IND

3h 53m1 stop

$197Delta

Find Deal

Sat, Sep 13 - Tue, Sep 16

6:00 pm - 10:35 pmIND-STL

5h 35m1 stop

1:35 pm - 10:25 pmSTL-IND

7h 50m2 stops

$202Southwest

Find Deal

Mon, Sep 8 - Wed, Sep 10

6:30 am - 9:33 amIND-STL

4h 03m1 stop

5:05 pm - 11:29 pmSTL-IND

5h 24m1 stop

$206Delta

Find Deal

Sun, Sep 14 - Sat, Sep 20

7:30 am - 1:10 pmIND-STL

6h 40m2 stops

11:10 am - 8:15 pmSTL-IND

8h 05m2 stops

$207Southwest

Find Deal

Wed, Sep 10 - Wed, Sep 17

6:35 pm - 10:02 amIND-STL

16h 27m1 stop

10:57 am - 9:20 amSTL-IND

21h 23m2 stops

$262Spirit Airlines

Find Deal

Mon, Oct 20 - Thu, Oct 23

6:35 pm - 10:02 amIND-STL

16h 27m1 stop

10:57 am - 9:20 amSTL-IND

21h 23m3 stops

$300Spirit Airlines

Find Deal

Mon, Oct 20 - Thu, Oct 23

9:00 am - 4:40 pmIND-STL

8h 40m1 stop

8:10 am - 1:17 pmSTL-IND

4h 07m1 stop

$367United Airlines

Find Deal

Wed, Aug 27 - Sun, Aug 31

7:15 am - 10:40 amIND-STL

4h 25m1 stop

5:30 pm - 9:51 pmSTL-IND

3h 21m1 stop

$377United Airlines

Find Deal

Thu, Aug 28 - Sun, Aug 31

Delta flights from Indianapolis to St. Louis

Our best Delta deals on Indianapolis to St. Louis flight tickets

Delta

Sep 13

IND6:51 pmIndianapolis

4h 09m

1 stop

STL10:00 pmLambert-St Louis

Sep 16

STL5:11 pmLambert-St Louis

3h 53m

1 stop

IND10:04 pmIndianapolis

$197

Find similar

Delta

Sep 14

IND6:30 amIndianapolis

4h 03m

1 stop

STL9:33 amLambert-St Louis

Sep 20

STL5:05 pmLambert-St Louis

5h 24m

1 stop

IND11:29 pmIndianapolis

$206

Find similar

Delta

Sep 5

IND6:30 amIndianapolis

4h 02m

1 stop

STL9:32 amLambert-St Louis

Sep 7

STL6:40 amLambert-St Louis

3h 38m

1 stop

IND11:18 amIndianapolis

$215

Find similar

Spirit Airlines flights from Indianapolis to St. Louis

Our best Spirit Airlines deals on Indianapolis to St. Louis flight tickets

Spirit Airlines

Oct 20

IND6:35 pmIndianapolis

16h 27m

1 stop

STL10:02 amLambert-St Louis

Oct 23

STL10:57 amLambert-St Louis

21h 23m

2 stops

IND9:20 amIndianapolis

$262

Find similar

Spirit Airlines

Oct 20

IND6:35 pmIndianapolis

16h 27m

1 stop

STL10:02 amLambert-St Louis

Oct 23

STL10:57 amLambert-St Louis

21h 23m

3 stops

IND9:20 amIndianapolis

$300

Find similar

Spirit Airlines

Aug 28

IND5:45 amIndianapolis

8h 47m

2 stops

STL1:32 pmLambert-St Louis

Sep 1

STL2:30 pmLambert-St Louis

20h 00m

3 stops

IND11:30 amIndianapolis

$413

Find similar

Fly from

Fly to

Route

Depart

Return

Price

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Fri 9/26

8:58 pm-9:06 am

1 stop13h 08m

Lambert-St Louis

Sun 9/28

10:39 am-6:27 pm

1 stop6h 48m

$163

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Wed 9/10

9:36 am-1:09 pm

1 stop4h 33m

Lambert-St Louis

Wed 9/17

6:29 am-12:23 pm

1 stop4h 54m

$175

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Sat 9/13

6:51 pm-10:00 pm

1 stop4h 09m

Lambert-St Louis

Tue 9/16

5:11 pm-10:04 pm

1 stop3h 53m

$197

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Mon 9/8

6:00 pm-10:35 pm

1 stop5h 35m

Lambert-St Louis

Wed 9/10

1:35 pm-10:25 pm

2 stops7h 50m

$202

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Sun 9/14

6:30 am-9:33 am

1 stop4h 03m

Lambert-St Louis

Sat 9/20

5:05 pm-11:29 pm

1 stop5h 24m

$206

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Wed 9/10

7:30 am-1:10 pm

2 stops6h 40m

Lambert-St Louis

Wed 9/17

11:10 am-8:15 pm

2 stops8h 05m

$207

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Mon 10/20

6:35 pm-10:02 am

1 stop16h 27m

Lambert-St Louis

Thu 10/23

10:57 am-9:20 am

2 stops21h 23m

$262

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Mon 10/20

6:35 pm-10:02 am

1 stop16h 27m

Lambert-St Louis

Thu 10/23

10:57 am-9:20 am

3 stops21h 23m

$300

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Wed 8/27

9:00 am-4:40 pm

1 stop8h 40m

Lambert-St Louis

Sun 8/31

8:10 am-1:17 pm

1 stop4h 07m

$367

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Thu 8/28

7:15 am-10:40 am

1 stop4h 25m

Lambert-St Louis

Sun 8/31

5:30 pm-9:51 pm

1 stop3h 21m

$377

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

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

Prices

Airlines

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 $276. 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 August 2025, prices for Indianapolis to St. Louis flights are approximately 31% 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

Best Price Found	$88
Fastest flight time	3h 05m
Direct flights	None
Airports in St. Louis	1 airport

The best one-way flight to St. Louis from Indianapolis in the past 72 hours is $88. The best round-trip flight deal from Indianapolis to St. Louis found on momondo in the last 72 hours is $163.

The fastest flight from Indianapolis to St. Louis takes 3h 05m

There are no direct flights from Indianapolis to St. Louis. Popular non-direct route for this connection is Indianapolis Airport - Lambert-St Louis Airport.

There is 1 airport near St. Louis: 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 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?
As of August 2025, there are 3 operators available to choose from 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?
momondo data reveals that the most frequently booked airline on the route from Indianapolis to St. Louis is American Airlines, representing 49% of all bookings. The subsequent popular airlines are Delta at 29% and United Airlines at 22%.

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
United Airlines	PriceFrom $216	Free Cancellation	Rating 7.4 8,916 reviews	Search United Airlines flights
Delta	PriceFrom $226	Free Cancellation	Rating 8.0 7,980 reviews	Search Delta flights
American Airlines	PriceFrom $248	Free Cancellation	Rating 7.2 10,000 reviews	Search American Airlines flights

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Alton

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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.