Denver (DEN) to Louisville (SDF)

1,021mi
1,644 km888 nm

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.

Route map: DEN → SDFDENSDF

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What actually flies DENSDF

Filed traffic data

In June 2026, United Airlines operated the most departures, one of 3 carriers flying nonstop DEN–SDF; the Airbus A319 was the most common aircraft at 62% of departures; flights ran 88% full.

Departures

178

June 2026

Seats

25,032

both directions

Passengers

22,124

both directions

Load factor

88.4%

RPM ÷ ASM

Who flies DEN–SDF?

United Airlines operated the most nonstop DEN–SDF departures in June 2026 (119), one of 3 carriers on the route.

What plane flies DEN–SDF?

In June 2026, the Airbus A319 flew 62% of DEN–SDF departures — more than any other aircraft type.

How has DEN–SDF traffic changed?

Nonstop DEN–SDF departures fell from 195 in July 2025 to 178 in June 2026.

Monthly nonstop DENSDF traffic, trailing 12 months through June 2026. Bars scale to the busiest month; months with no filed service show as zero.

  • 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

  • June 2026

    178 departures · 22,124 passengers

    88.4%

    Load

By direction

Each direction is filed separately — they rarely match.

DENSDF

86.7% full

90 departures · 11,008 passengers

SDFDEN

90.1% full

88 departures · 11,116 passengers

Nonstop DEN–SDF traffic has been filed since 2025.

Source: US DOT BTS Form 41 T-100 Segment (All Carriers). Data through June 2026; filings from 2025. Public domain (US Government work).

The airports

DEN

US

Denver International Airport

Coordinates

39.86°N, 104.67°W

Hemisphere

N · W

SDF

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 June 2026, the Airbus A319 flew the largest share of departures (62.4%), followed by the Boeing 737 MAX 8 (12.9%).

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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