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Route Reliability

Denver → Louisville

DEN–SDF · 1,024 miles · Denver International Airport to Louisville Muhammad Ali International Airport

80
Pretty Reliable
WanderNerd Reliability Score
76%
Arrive within 15 minutes
12 min
Average arrival delay
0.7%
Cancelled
1,106
Flights in the data

Data through May 2026.

Who flies it best

Ranked by on-time arrivals. Historical results, not predictions.

  1. 1.United Airlines80%731 flights
  2. 2.Southwest Airlines67%375 flights

What the data says

Morning-you made the right choice.

DEN–SDF flights departing between 9 AM–12 PM arrived on time 88% of the time, versus 48% between 9 PM–12 AM.

Skip Thursday if you can.

DEN–SDF flights arrived on time 82% of the time on Saturdays. On Thursdays: 69%.

United Airlines runs this route best.

United Airlines arrived on time 80% of the time on this route; Southwest Airlines managed 67%.

Best historical flights

Ranked by on-time arrivals, minimum 100 flights. Past performance, not a promise.

Top flights by on-time rate

More flights on this route

The breakdown

On-time by weekday
  • Mon79%(155 flights)
  • Tue77%(154 flights)
  • Wed79%(156 flights)
  • Thu69%(157 flights)
  • Fri74%(156 flights)
  • Sat82%(153 flights)
  • Sun72%(167 flights)
On-time by departure window
  • 6–9 AM—(1 flights)
  • 9 AM–12 PM88%(425 flights)
  • 12–3 PM82%(82 flights)
  • 3–6 PM71%(443 flights)
  • 6–9 PM59%(97 flights)
  • 9 PM–12 AM48%(50 flights)
On-time trend by month
79%
May

Jun 61% → May 79% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202561%94
July 202553%96
August 202570%94
September 202578%90
October 202583%93
November 202581%87
December 202575%93
January 202687%89
February 202682%84
March 202676%92
April 202689%92
May 202679%94

Keep nerding

Based on 1,106 historical flights, because apparently we checked. Historical flight data: U.S. Bureau of Transportation Statistics, June 2025 – May 2026. Data through May 2026. How we calculate this.