Cheap Flights from Indianapolis to St Louis

Compare Indianapolis to St Louis flight deals

Find the cheapest month or even day of the year to fly to St Louis

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Flight deals from Indianapolis Airport to St Louis Airport

Looking for a cheap last-minute deal or the best return flight from Indianapolis Airport to St Louis Airport? If you want to travel next month, return fares start from ج.م.‏ 9,549. Find the lowest prices on one-way and return tickets right here.

Find the cheapest month to fly from Indianapolis to St Louis

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Indianapolis to St Louis flights are currently cheapest in April.

Direct flights from Indianapolis to St Louis

Indianapolis to St Louis: Alternative routes

Compare routes from Indianapolis to St Louis below. You may find an airport to fly into that's cheaper, faster, or easier than St Louis.

Indianapolis to St Louis: Flight information

The things to know before you go.
Cheapest flight foundج.م.‏ 4,273
Cheapest month to flyApril
Average flight time1 hr
Most popular airlineSouthwest Airlines
Average flights per week2

Finding cheap flights from Indianapolis to St Louis: Frequently asked questions

The best price we found for a return flight from Indianapolis to St Louis is ج.م.‏ 9,549. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.
1 hour is the average flight time from Indianapolis to St Louis.
Southwest Airlines flies direct from Indianapolis to St Louis.
As of March 2026, there are 2 flights per week flying from Indianapolis to St Louis.
The cheapest month to fly from Indianapolis to St Louis is usually April.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from Indianapolis Airport to St Louis Airport on Thursday, 16 April 2026.
Yes – the average flight time is 1 hour.
We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to St Louis but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.
We crunched all the numbers in our flight calendar and it looks like the cheapest time to book a flight to St Louis is around 40 days in advance, so don’t leave your flight to the last minute.
Currently, Frontier Airlines offers the cheapest flight tickets to St Louis.

Travelling from Indianapolis International Airport (IND) to Lambert-St. Louis International Airport (STL): what you need to know

  • The timezone in St Louis is UTC-5, which is one hour behind Indianapolis.

  • Your IND to STL flight won't wait if you're late, so don't forget to check in on time. Arrive up to one hour in advance for domestic flights and two hours ahead for international travel.

  • Travelling during a peak month such as July? Public holidays and other popular periods can mean longer lines and delays at security. Be extra cautious and arrive up to four hours before an international flight and two hours before a domestic departure.

  • We make it a piece of cake to book a flight with a stopover. To see all your options for tickets from Indianapolis International Airport to Lambert-St. Louis International Airport, deselect 'Direct flights only.' Then, pick a flight offering a stop long enough to visit the city of your choice. Top stopovers between IND and STL include:

    • O'Hare International Airport

    • Detroit Metropolitan Wayne County Airport

    • Hartsfield-Jackson Atlanta International Airport

How to find the cheapest flights from Indianapolis International Airport (IND) to Lambert-St. Louis International Airport (STL)

  • Currently, ج.م.‏ 4,273 is the lowest price we've seen for a one-way Indianapolis International Airport to Lambert-St. Louis International Airport flight. The best price for a return ticket is ج.م.‏ 9,549. Keep in mind that fares could change due to demand at the time of booking.

  • To get your hands on cheap tickets from IND to STL, book as early as you can. Airlines tend to offer the most competitive fares when flights are first made available.

  • The 'Whole month' search function shows you the cheapest flights from Indianapolis International Airport to Lambert-St. Louis International Airport across each month. It's a great way to snap up a bargain if your plans are flexible.

  • Cut down on the time spent looking for cheap flights from IND to STL by creating a Price Alert. We'll send you an email or notification through the app when fares go down.

  • Pick your ideal arrival and departure times, airlines and number of stops with the filters. Alternatively, sort your results by 'Cheapest' to find the best deals on flights from Indianapolis International Airport to Lambert-St. Louis International Airport.

Handy information about Indianapolis International Airport (IND)

  • IND is located at 7800 Col. H. Weir Cook Memorial Drive.

  • 79.86% of flights that depart Indianapolis International Airport make it to their destination on time.

  • To reach Indianapolis International Airport from central Indianapolis, it takes about 25 minutes if you're going by car. Of course, this depends on traffic conditions. It's approximately 24 kilometres from the airport to the city centre.

  • Planning to catch public transport? Expect a journey time of around 1 hour.

  • Catching an early flight from Indianapolis International Airport to Lambert-St. Louis International Airport? Avoid the hassle of rushing to the terminal (and get some extra shut-eye) by picking one of these hotels near IND:

Arriving at Lambert-St. Louis International Airport (STL)

Getting from Lambert-St. Louis International Airport (STL) to central St Louis

  • You'll find STL at 10701 Lambert International Blvd..

  • Lambert-St. Louis International Airport to central St Louis has a drive time of about 20 minutes. It's approximately 26 kilometres away.

  • Getting to the centre on public transport takes around 35 minutes.

When to fly to Lambert-St. Louis International Airport (STL)

  • It's time to plan your travel dates for your flight from Indianapolis International Airport to Lambert-St. Louis International Airport. July is the busiest month to visit St Louis. If you prefer a more low-key vibe, go in April.

  • The warmest month in St Louis is July, with temperatures ranging between 17ºC and 33ºC. Book your flights from Indianapolis International Airport to Lambert-St. Louis International Airport in this month if this is the type of weather you like.

  • January has average temperatures of between -8ºC and 7ºC. Search for cheap tickets from IND to STL around that time if you like cooler conditions.

Explore more of United States

  • You've seen St Louis, now it's time to explore more of United States. Travel about 418 kilometres north-east to Chicago to tick off its leading attractions. From Millennium Park to Art Institute of Chicago and LandShark Beer Garden at Navy Pier, there's plenty to keep you busy.

  • If you're looking to explore another great destination in United States, consider Indianapolis, roughly 370 kilometres east of St Louis. The Children's Museum of Indianapolis, Indianapolis Museum of Art and Indianapolis Zoo are the start of reasons to visit.

Prices shown on this page are estimated lowest prices only. Found in the last 45 days.