Denver (DEN) to Louisville (SDF)
Flight time
≈ 2h 51m
Bearing
90° E
Denver (DEN) to Louisville (SDF) is 1,021 miles (1,644 km) as the crow flies — the great-circle baseline most distance-based mileage programs credit.
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What actually flies DEN–SDF
Filed traffic dataIn May 2026, United Airlines operated the most departures, one of 2 carriers flying nonstop DEN–SDF; the Airbus A319 was the most common aircraft at 57% of departures; flights ran 80% full.
Departures
189
May 2026
Seats
26,493
both directions
Passengers
21,177
both directions
Load factor
79.9%
RPM ÷ ASM
Who flies DEN–SDF?
United Airlines operated the most nonstop DEN–SDF departures in May 2026 (126), one of 2 carriers on the route.
- UA
126 departures · 16,456 seats
Share of departures66.7%78.1%
Load
- WN
63 departures · 10,037 seats
Share of departures33.3%82.9%
Load
What plane flies DEN–SDF?
In May 2026, the Airbus A319 flew 57% of DEN–SDF departures — more than any other aircraft type.
- Airbus A319
108 departures · 80.7% load
57.1% - Boeing 737-700
26 departures · 83.6% load
13.8% - Boeing 737 MAX 8
26 departures · 81.8% load
13.8% - Boeing 737-800
13 departures · 82.3% load
6.9% - Airbus A320
12 departures · 69.4% load
6.3% - Boeing 737-900ER
4 departures · 54.9% load
2.1%
How has DEN–SDF traffic changed?
Nonstop DEN–SDF departures rose from 186 in June 2025 to 189 in May 2026.
Monthly nonstop DEN–SDF traffic, trailing 12 months through May 2026. Bars scale to the busiest month; months with no filed service show as zero.
June 2025
186 departures · 21,454 passengers
80.6%
Load
July 2025
195 departures · 22,816 passengers
78.3%
Load
August 2025
188 departures · 19,780 passengers
72.4%
Load
September 2025
180 departures · 22,495 passengers
83.6%
Load
October 2025
186 departures · 22,737 passengers
82.9%
Load
November 2025
175 departures · 17,512 passengers
68.4%
Load
December 2025
185 departures · 19,693 passengers
71.4%
Load
January 2026
176 departures · 16,225 passengers
65.8%
Load
February 2026
168 departures · 18,168 passengers
72.9%
Load
March 2026
184 departures · 19,875 passengers
75.8%
Load
April 2026
184 departures · 20,082 passengers
78.7%
Load
May 2026
189 departures · 21,177 passengers
79.9%
Load
By direction
Each direction is filed separately — they rarely match.
SDF → DEN
82.1% full
95 departures · 10,953 passengers
DEN → SDF
77.7% full
94 departures · 10,224 passengers
Nonstop DEN–SDF traffic has been filed since 2025.
Source: US DOT BTS Form 41 T-100 Segment (All Carriers). Data through May 2026; filings from 2025. Public domain (US Government work).
The airports
Louisville
US
Louisville Muhammad Ali International Airport
Coordinates
38.17°N, 85.74°W
Hemisphere
N · W
Frequently asked
How far is Denver (DEN) from Louisville (SDF)?
DEN to SDF is 1,021 miles (1,644 km / 888 nautical miles) measured great-circle — the shortest path over the surface of the Earth.
How long is the flight from DEN to SDF?
A nonstop covers the 1,021-mile great-circle distance in roughly 2h 51m of block time, before winds. Actual schedules vary a few percent by direction and aircraft.
What plane flies DEN–SDF?
In May 2026, the Airbus A319 flew the largest share of departures (57.1%), followed by the Boeing 737-700 (13.8%).
What mileage do I earn flying DEN–SDF?
Distance-based programs credit off the 1,021-mile great-circle figure, then apply your fare-class earning rate. Revenue-based programs credit off the fare instead.
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