St. Louis Lambert International Airport
St. Louis, United StatesSTL / KSTL
Major airport · 88 direct destinations · 4 runways · longest runway 11,020 ft
57 °F · Partly cloudySource: METAR observation via the NOAA Aviation Weather Center
Route
St. Louis → Louisville
STL
St. LouisSt. Louis Lambert International Airport
St. LouisSt. Louis Lambert International AirportSDFLouisvilleLouisville Muhammad Ali International Airport
LouisvilleLouisville Muhammad Ali International Airport- Distance
- 254 mi
- Estimated flight time
- ~1h
Louisville is currently 1 hour ahead of St. Louis.
Observed nonstop
How often does this route fly?
Frequency
Daily at most
On average around 1 flights a day, observed from October 2025 to September 2026.
- 1
- flights per day
- 1
- busiest month · Oct
- 45 min
- measured flight time
- 12 / 12
- months seen
Through the year
Per day, month by month
- 1Jan2026
- 1Feb
- 1Mar
- 1Apr
- 1May
- 1Jun
- 1Jul
- 1Aug
- 1Sep
- 1Oct2025
- 1Nov
- 1Dec
Airlines
Who flies it
UPS Airlinesall year
Arizona Express Airlineswinter
Republic Airwaysautumn
Sun Country Airlinesnow and then
Through the day
Departure times
Local time in St. Louis. Most departures between 21:00 and 00:00.
- 00:00
- 01:00
- 02:00
- 03:00
- 04:00
- 05:00
- 06:00
- 07:00
- 08:00
- 09:00
- 10:00
- 11:00
- 12:00
- 13:00
- 14:00
- 15:00
- 16:00
- 17:00
- 18:00
- 19:00
- 20:00
- 21:00
- 22:00
- 23:00
Through the week
By weekday
- 0.2Mon
- 1.2Tue
- 1.2Wed
- 1.1Thu
- 1.2Fri
- 1Sat
- 0.2Sun
Fleet
Aircraft observed
- Airbus A300-600A30649%
- Boeing 757-200B75222%
- Boeing 767-300B7635%
- G2804%
- Embraer Phenom 300E55P2%
All the numbers in a table
| Month | Per day | Seen | Airlines |
|---|---|---|---|
| January 2026 | 1 | 27 |
|
| February 2026 | 1 | 27 |
|
| March 2026 | 1 | 24 |
|
| April 2026 | 1 | 27 |
|
| May 2026 | 1 | 23 |
|
| June 2026 | 1 | 28 |
|
| July 2026 | 1 | 28 |
|
| August 2026 | 1 | 25 |
|
| September 2026 | 1 | 28 |
|
| October 2025 | 1 | 31 |
|
| November 2025 | 1 | 26 |
|
| December 2025 | 1 | 26 |
|
Airlines observed on this route
From observed callsign routes on STL-SDF - not a booking guarantee.
About this route
- Domestic route: both airports are in the same country.
- The opposite direction has also been observed as a direct connection.
- Direct destinations observed from St. Louis: 88.
- Direct destinations observed from Louisville: 142.
The airports on this route
Louisville Muhammad Ali International Airport
Louisville, United StatesSDF / KSDF
Regional airport · 142 direct destinations · 3 runways · longest runway 11,886 ft
55 °F · CloudySource: METAR observation via the NOAA Aviation Weather Center
Alternative airports for this journey
Same journey, a different airport nearby - with an observed direct connection.
About the route from St. Louis to Louisville
The observed direct connection between St. Louis Lambert International Airport (STL) and Louisville Muhammad Ali International Airport (SDF) covers approximately 254 mi. The estimated flight time is around 1h. Arizona Express Airlines, Republic Airways, Sun Country Airlines and UPS Airlines have been observed on this connection in the available route data.
Frequently asked questions about this route
- How far is St. Louis from Louisville by air?
- The great-circle distance between St. Louis Lambert International Airport and Louisville Muhammad Ali International Airport is approximately 254 mi.
- How long is the flight from St. Louis to Louisville?
- Based on the distance, the estimated flight time is about 1h. This is an estimate, not a schedule.
- Is there a direct connection from St. Louis to Louisville?
- Yes, a direct connection between STL and SDF has been observed in our route data.
- Which airlines have been observed on this route?
- In the available route data: Arizona Express Airlines, Republic Airways, Sun Country Airlines and UPS Airlines.
- How often is there a flight from St. Louis to Louisville?
- On average around 1 flights a day, measured over twelve months (October 2025 to September 2026) in the flight archive, with 320 observed flights. Mainly UPS Airlines, Arizona Express Airlines, Republic Airways. That is an observation, not a timetable.
- What is the current time difference between St. Louis and Louisville?
- Louisville is currently 1 hour ahead of St. Louis.
Where this data comes from
The route data comes from the flight archive (ADS-B, adsb.lol): which connections actually flew over the last twelve full months and who flew them, combined with our own airport, runway, and airline datasets. It is reference data about observed routes - not a current timetable and no claim about bookability.
The frequency and aircraft on this page come from the flight archive (ADS-B, 12 months, October 2025 to September 2026), summarized per route per month. We do not see every flight, so it is a floor, not a count.
Route data updated on October 11, 2026.