Denver International Airport
Denver, United StatesDEN / KDEN
International hub · 203 direct destinations · 6 runways · longest runway 16,001 ft
43 °F · ClearSource: METAR observation via the NOAA Aviation Weather Center
Route
Denver → Louisville
DEN
DenverDenver International Airport
DenverDenver International AirportSDFLouisvilleLouisville Muhammad Ali International Airport
LouisvilleLouisville Muhammad Ali International Airport- Distance
- 1,022 mi
- Estimated flight time
- ~2h 35m
Louisville is currently 2 hours ahead of Denver.
Observed nonstop
How often does this route fly?
Frequency
Several times a day
On average around 5 flights a day, observed from October 2025 to September 2026.
- 5
- flights per day
- 5
- busiest month · Oct
- 4
- quietest month · Aug
- 2 hr 3 min
- measured flight time
- 12 / 12
- months seen
Through the year
Per day, month by month
- 4.5Jan2026
- 5Feb
- 5Mar
- 5Apr
- 5May
- 5Jun
- 5Jul
- 4Aug
- 4Sep
- 5Oct2025
- 5Nov
- 5Dec
Airlines
Who flies it
United Airlinesall year
UPS Airlinesall year
Southwest Airlinesall year
Through the day
Departure times
Local time in Denver. Most departures between 07:00 and 10:00.
- 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
- 2.9Mon
- 4.9Tue
- 5.2Wed
- 5.6Thu
- 5Fri
- 4.6Sat
- 3.9Sun
Fleet
Aircraft observed
- Boeing 767-300B76328%
- Airbus A319A31924%
- Airbus A320A32012%
- Boeing 737 MAX 8B38M8%
- Boeing 737-800B7386%
All the numbers in a table
| Month | Per day | Seen | Airlines |
|---|---|---|---|
| January 2026 | 4.5 | 132 |
|
| February 2026 | 5 | 138 |
|
| March 2026 | 5 | 137 |
|
| April 2026 | 5 | 141 |
|
| May 2026 | 5 | 131 |
|
| June 2026 | 5 | 133 |
|
| July 2026 | 5 | 146 |
|
| August 2026 | 4 | 130 |
|
| September 2026 | 4 | 131 |
|
| October 2025 | 5 | 147 |
|
| November 2025 | 5 | 138 |
|
| December 2025 | 5 | 148 |
|
Airlines observed on this route
From observed callsign routes on DEN-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 Denver: 203.
- 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 Denver to Louisville
The observed direct connection between Denver International Airport (DEN) and Louisville Muhammad Ali International Airport (SDF) covers approximately 1,022 mi. The estimated flight time is around 2h 35m. Southwest Airlines, United Airlines and UPS Airlines have been observed on this connection in the available route data.
Frequently asked questions about this route
- How far is Denver from Louisville by air?
- The great-circle distance between Denver International Airport and Louisville Muhammad Ali International Airport is approximately 1,022 mi.
- How long is the flight from Denver to Louisville?
- Based on the distance, the estimated flight time is about 2h 35m. This is an estimate, not a schedule.
- Is there a direct connection from Denver to Louisville?
- Yes, a direct connection between DEN and SDF has been observed in our route data.
- Which airlines have been observed on this route?
- In the available route data: Southwest Airlines, United Airlines and UPS Airlines.
- How often is there a flight from Denver to Louisville?
- On average around 5 flights a day, measured over twelve months (October 2025 to September 2026) in the flight archive, with 1,652 observed flights. Mainly United Airlines, UPS Airlines, Southwest Airlines. That is an observation, not a timetable.
- What is the current time difference between Denver and Louisville?
- Louisville is currently 2 hours ahead of Denver.
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.