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Route Reliability

Louisville → Philadelphia

SDF–PHL · 577 miles · Louisville Muhammad Ali International Airport to Philadelphia International Airport

83
Pretty Reliable
WanderNerd Reliability Score
85%
Arrive within 15 minutes
1 min
Average arrival delay
2.1%
Cancelled
989
Flights in the data

Data through May 2026.

American Airlines is the only airline in this data on this route, arriving on time 85% of the time across 989 flights. No comparison to make.

What the data says

Morning flights do better here.

SDF–PHL flights departing between 6–9 AM arrived on time 91% of the time, versus 73% between 3–6 PM.

Thursday is the weak spot.

SDF–PHL flights arrived on time 88% of the time on Wednesdays. On Thursdays: 75%.

Ticking up lately.

SDF–PHL flights arrived on time 88% of the time over the last three months in the data, compared with 84% in the three months before that.

Flights on this route

The breakdown

On-time by weekday
  • Mon86%(140 flights)
  • Tue86%(136 flights)
  • Wed88%(137 flights)
  • Thu75%(143 flights)
  • Fri85%(142 flights)
  • Sat87%(127 flights)
  • Sun87%(140 flights)
On-time by departure window
  • 3–6 AM—(2 flights)
  • 6–9 AM91%(351 flights)
  • 9 AM–12 PM86%(273 flights)
  • 12–3 PM85%(67 flights)
  • 3–6 PM73%(206 flights)
  • 6–9 PM80%(66 flights)
On-time trend by month
93%
May

Jun 74% → May 93% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202574%87
July 202582%84
August 202589%87
September 202590%97
October 202584%112
November 202588%64
December 202579%76
January 202691%58
February 202681%68
March 202680%92
April 202690%67
May 202693%73

Keep nerding

Based on 989 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.