STL - IND

$71 Find Cheap Flights from St. Louis to Indianapolis

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from St. Louis to Indianapolis departing on 4/15. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to Indianapolis

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from St. Louis to Indianapolis, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from St. Louis to Indianapolis, as well as popular online travel agencies
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41,299,237 searches in the past 7 days on KAYAK

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Everything you should know

Cheapest round-trip
$230
Overall average: $647
Frontier
Mon 3/16Mon 3/23
STL - IND • 1 stop
Cheapest non-stop
$439
Southwest
Thu 4/2Sun 4/5
STL - IND • Non-stop
Nonstop flights
4 days a week
Tue, Thu, Fri, Sun
You can fly direct with Southwest. Average duration is 0
Direct flights
Direct flights
+1
+1
Direct flights
Direct flights
+1
Top airlines
American Airlines
Cheapest • from $253 (round-trip)
American Airlines
Best reviews • 7.2 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Top layover airports
Charlotte (CLT)
Cheapest • Avg $316 (round-trip)
Detroit (DTW)
Shortest trip • 3h 26m (one-way)
Insights
Insights
Insights
Insights
When to travel
August
Cheapest • 46% price drop
July
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
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KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Indianapolis!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from St. Louis to Indianapolis (STL-IND)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from St. Louis to Indianapolis that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from St. Louis to Indianapolis

Mon, Mar 16 - Mon, Mar 23
Multiple Airlines Logo
8:12 pm - 7:38 pm
STL
-
IND
22h 26m
1 stop
Multiple Airlines Logo
5:08 pm - 10:32 am
IND
-
STL
18h 24m
2 stops
$230Multiple Airlines
Fri, Apr 17 - Sun, Apr 19
Frontier Logo
8:12 pm - 9:49 am
STL
-
IND
12h 37m
2 stops
Frontier Logo
12:12 pm - 6:50 am
IND
-
STL
19h 38m
1 stop
$253Frontier
Tue, Mar 10 - Wed, Mar 11
Delta Logo
5:21 pm - 11:44 pm
STL
-
IND
5h 23m
1 stop
Delta Logo
3:25 pm - 8:42 pm
IND
-
STL
6h 17m
1 stop
$255Delta
Wed, Apr 15 - Thu, Apr 16
Frontier Logo
8:13 pm - 11:17 am
STL
-
IND
14h 04m
1 stop
Frontier Logo
6:01 pm - 6:50 am
IND
-
STL
13h 49m
2 stops
$258Frontier
Wed, Apr 15 - Thu, Apr 16
American Airlines Logo
7:05 am - 4:51 pm
STL
-
IND
8h 46m
1 stop
American Airlines Logo
12:16 pm - 4:41 pm
IND
-
STL
5h 25m
1 stop
$261American Airlines
Wed, Mar 18 - Thu, Mar 19
Frontier Logo
11:32 am - 11:16 am
STL
-
IND
22h 44m
1 stop
Frontier Logo
8:33 pm - 9:49 am
IND
-
STL
14h 16m
1 stop
$263Frontier
Thu, Apr 9 - Sun, Apr 12
American Airlines Logo
7:05 am - 1:10 pm
STL
-
IND
5h 05m
1 stop
American Airlines Logo
7:13 am - 4:41 pm
IND
-
STL
10h 28m
1 stop
$271American Airlines
Wed, Mar 18 - Thu, Mar 19
Southwest Logo
6:10 am - 2:45 pm
STL
-
IND
7h 35m
2 stops
Southwest Logo
6:40 am - 9:00 am
IND
-
STL
3h 20m
1 stop
$272Southwest
Tue, Mar 3 - Fri, Mar 6
Multiple Airlines Logo
3:49 pm - 8:32 am
STL
-
IND
15h 43m
1 stop
Multiple Airlines Logo
8:33 pm - 9:49 am
IND
-
STL
14h 16m
1 stop
$274Multiple Airlines
Mon, Apr 6 - Fri, Apr 10
Frontier Logo
8:16 pm - 7:42 pm
STL
-
IND
22h 26m
1 stop
Frontier Logo
12:18 pm - 11:55 pm
IND
-
STL
12h 37m
2 stops
$276Frontier
Booking Insights

KAYAK's insights & trends for St. Louis to Indianapolis flights

Get data-powered insights and trends into flights from St. Louis to Indianapolis to help you find the cheapest flights, the best time to fly and much more.

What is the cheapest month to fly from St. Louis to Indianapolis?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from St. Louis to Indianapolis, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from St. Louis to Indianapolis is August, where tickets cost $234 (return) on average. On the other hand, the most expensive months are January and November, where the average cost of round-trip tickets is $685 and $684 respectively.

Find deals

Good to know

Low seasonJanuary
Cheapest flight$71
Best time to beat the crowds but there is an average 58% increase in price.
Most popular time to fly and prices are also 32% lower on average.
Flight from St. Louis to Indianapolis

When to book flights from St. Louis to Indianapolis

Are your dates flexible? Find out the best times to travel from St. Louis to Indianapolis based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from St. Louis to Indianapolis

  • What is the cheapest flight from St. Louis to Indianapolis?

    In the last 3 days, the lowest price for a flight from St. Louis to Indianapolis was $71 for a one-way ticket and $230 for a round-trip.

  • Do I need a passport to fly between St. Louis and Indianapolis?

    No

  • Which airports will I be using when flying from St. Louis to Indianapolis?

    When flying out of St. Louis you will be using Lambert-St Louis. You will be landing at Indianapolis, also known as Indianapolis.

  • Which aircraft models fly most regularly from St. Louis to Indianapolis?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from St. Louis to Indianapolis?

    oneworld is the only airline alliance operating flights between St. Louis and Indianapolis.

  • How does KAYAK find such low prices on flights from St. Louis to Indianapolis?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from St. Louis to Indianapolis.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from St. Louis to Indianapolis?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Indianapolis from St. Louis is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from St. Louis to Indianapolis?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Indianapolis with an airline and back to St. Louis with another airline. Booking your flights between St. Louis and IND can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from St. Louis to Indianapolis?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Indianapolis from St. Louis up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Prefer to fly direct from St. Louis to Indianapolis?

 
Direct data is based off flight results for the next 60 days. Find direct flights from all airlines flying direct from Lambert-St Louis to Indianapolis.
Find which airlines fly direct from Lambert-St Louis Airport to Indianapolis Airport, which days they fly and book direct flights.

Direct departures

Lambert-St Louis to Indianapolis

Tuesday

Southwest

Southwest

Thursday

Southwest

Southwest

Friday

Southwest

Southwest

Sunday

Southwest

Southwest

See more direct flights

Direct returns

Indianapolis to Lambert-St Louis

Tuesday

Southwest

Southwest

Thursday

Southwest

Southwest

Friday

Southwest

Southwest

Sunday

Southwest

Southwest

See more direct flights

Reviews of the top airline flying from St. Louis to Indianapolis

 
See real verified KAYAK customer reviews for airlines flying from St. Louis to Indianapolis. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from St. Louis to Indianapolis? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.2
American AirlinesOverall score based on 11313 reviews
7.5Boarding
7.2Comfort
8.0Crew
6.9Entertainment
6.4Food
Airline reviews

Waiting for gate in RDU for more than 20mins is crazy.

2.0 MediocreBalaji, Feb 2026
OMA - ORD
Read more American Airlines reviews

Waiting for gate in RDU for more than 20mins is crazy.

Flight was on time and there was an empty seat next to me. That makes for a good flight!

Maintenance took a very long time and then we were in a holding pattern. While a one-off maintenance issue is standard, there were delays on both of my flights for this trip based on maintenance issues with the planes, which delayed both flights over 45 minutes. Thankfully, I didn't have any connections but it wasn't an experience that would make me pick AA if I have other options.

I like that the flight attendant was very attentive and helpful. The meal menu could have more of an variety of food choices.

Everything was good. Flight was very full so crew was busy. After we boarded and plane pulled away from the gate, we were delayed about 40 minutes- sitting on the runway - due to weather en route or at the destination. While weather is not the fault of the airline- it’s terrible to sit on a plane and not moving.

We missed our flight and got stranded in Miami where we had to rent a hotel we could not afford. they would not work with us because they said it was weather related even though the gate attendant said it was not. I could go on but trying to get satisfaction has wore me down, which I believe is the intent. My only solution is to never fly AA again.

No Snacks or Entertainment. The flight was short, snacks should still be given.

We lost a day of our vacation because AA did not get the plane to the gate on time. Even though the gate attendant was very clear that it was not weather related, AA would do nothing because there was some snow that day. They basically said the gate attendant was wrong even though she was on the front line of the situation and they were not.

See prior comment about how Kayak mishandled my reservation and delayed my arrival by 6 hours.

American Airlines was great and worked very hard to change my ticket so I could get an earlier, direct flight back to Dallas. However, I was informed that Kayak made mistakes with my itinerary and classified my ticket as desiring to be on the earlier flight instead of taking the necessary step of calling AA to get me on the standby list. This ended up keeping me from being added to the standby list and delayed me getting home by 6 hours. I am happy to discuss this further with Kayak so they can correct their procedures so this won't happen again.

Everything you need to know for your flight from St. Louis to Indianapolis

Information on your arrival and departure airports

St. Louis (STL)
Indianapolis (IND)