Cheap flight tickets from St Louis to Indianapolis

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Flight deals from St Louis to Indianapolis

Looking for a cheap last-minute deal or the best return flight from St Louis to Indianapolis? Find the lowest prices on one-way and return tickets right here.

Find the cheapest month to fly from St Louis to Indianapolis

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

Direct flights from St Louis to Indianapolis

St Louis to Indianapolis: Alternative routes

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

St Louis to Indianapolis: Flight information

The things to know before you go.
Cheapest flight foundRM1,249
Cheapest month to flyMarch
Average flight time55 mins
Most popular airlineSouthwest Airlines
Average flights per week2

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

The best price we found for a return flight from St Louis to Indianapolis is RM1,249. 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.
55 minutes is the average flight time from St Louis to Indianapolis.
Southwest Airlines flies direct from St Louis to Indianapolis.
As of February 2026, there are 2 flights per week flying from St Louis to Indianapolis.
The cheapest month to fly from St Louis to Indianapolis is usually March.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from St Louis Airport to Indianapolis Airport on Saturday, 7 March 2026.
Yes – the average flight time is 55 minutes.
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 Indianapolis 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 Indianapolis is around 40 days in advance, so don’t leave your flight to the last minute.
Currently, United and Southwest Airlines offer the cheapest flight tickets to Indianapolis.

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

  • The timezone in Indianapolis is UTC-4, which is one hour ahead of St Louis.

  • For a stress-free journey, arrive at the airport two hours ahead of international flights and an hour before domestic departures. This will give you enough time to catch your STL to IND flight.

  • Travelling during a peak month such as July? Major public holidays and other high seasons can result in longer lines at security. Play it safe and get there up to four hours ahead of international flights and two hours before a domestic departure.

  • Think about adding a stopover when booking your ticket from Lambert-St. Louis International Airport to Indianapolis International Airport. Just deselect 'Direct flights only' to break up your trip, or visit a new city along the way. Check out these options between STL and IND:

    • O'Hare International Airport

    • Detroit Metropolitan Wayne County Airport

    • Hartsfield-Jackson Atlanta International Airport

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

  • The cheapest price we've found for a one-way Lambert-St. Louis International Airport to Indianapolis International Airport flight is RM322. A round-trip fare right now is RM1,249. Depending on the availability when you book, these fares may change.

  • Don't leave everything to the last minute. You're more likely to get cheap tickets from STL to IND if you book early. Airlines often offer some amazing early bird deals.

  • The 'Whole month' search function shows you the cheapest flights from Lambert-St. Louis International Airport to Indianapolis International Airport across the entire month. It's an easy way to snap up a bargain if your plans aren't set in stone.

  • You don't need to check every day to see if fares have gone down when you create a Price Alert. We'll update you as soon as a special offer becomes available on cheap flights from STL to IND.

  • Lock in the ideal flight for you with the help of the filters. To see the 'Best,' 'Fastest' or 'Cheapest' flights from Lambert-St. Louis International Airport to Indianapolis International Airport, use the 'Sort by' tool. You can also filter results by airline, departure and arrival times, and journey duration.

Handy information about Lambert-St. Louis International Airport (STL)

Arriving at Indianapolis International Airport (IND)

Getting from Indianapolis International Airport (IND) to central Indianapolis

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

  • From Indianapolis International Airport, Indianapolis is approximately 24 kilometres away. It takes around 25 minutes to reach the centre driving.

  • Getting there on public transport takes roughly 1 hour.

When to fly to Indianapolis International Airport (IND)

  • July is the most popular month for flights from Lambert-St. Louis International Airport to Indianapolis International Airport. To avoid the crowds, go to Indianapolis in April.

  • Lock in your flight from Lambert-St. Louis International Airport to Indianapolis International Airport for July if you want to explore Indianapolis during its warmest month. Expect temperatures of between 16ºC (61ºF) and 30ºC (86ºF).

  • January has average temperatures of between -12ºC (10ºF) and 5ºC (41ºF). Look for cheap tickets from STL to IND around that time if you like travelling in cooler conditions.

Explore more of United States

  • Chicago is just one of the many cities in United States waiting to be discovered once you've seen the sights of Indianapolis. Around 257 kilometres away to the north-west, popular attractions include Millennium Park, Art Institute of Chicago and LandShark Beer Garden at Navy Pier.

  • If there's time to check out another great destination in United States, head for Columbus, about 274 kilometres east of Indianapolis. Franklin Park Conservatory and Botanical Gardens, Ohio Statehouse and German Village are the start of reasons to visit.

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