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Route Reliability

Louisville → Baltimore

SDF–BWI · 495 miles · Louisville Muhammad Ali International Airport to Baltimore/Washington International Thurgood Marshall Airport

85
Pretty Reliable
WanderNerd Reliability Score
86%
Arrive within 15 minutes
2 min
Average arrival delay
2.4%
Cancelled
890
Flights in the data

Data through May 2026.

Southwest Airlines is the only airline in this data on this route, arriving on time 86% of the time across 890 flights. No comparison to make.

What the data says

Morning flights do better here.

SDF–BWI flights departing between 6–9 AM arrived on time 98% of the time, versus 54% between 6–9 PM.

Sunday scaries are real for this one.

SDF–BWI flights arrived on time 92% of the time on Mondays. On Sundays: 80%.

Slipping a little lately.

SDF–BWI flights arrived on time 85% of the time over the last three months in the data, compared with 92% in the three months before that.

Flights on this route

The breakdown

On-time by weekday
  • Mon92%(132 flights)
  • Tue90%(108 flights)
  • Wed92%(106 flights)
  • Thu83%(135 flights)
  • Fri82%(134 flights)
  • Sat87%(116 flights)
  • Sun80%(138 flights)
On-time by departure window
  • 3–6 AM96%(316 flights)
  • 6–9 AM98%(42 flights)
  • 9 AM–12 PM90%(122 flights)
  • 12–3 PM88%(66 flights)
  • 3–6 PM75%(297 flights)
  • 6–9 PM54%(26 flights)
On-time trend by month
90%
May

Jun 81% → May 90% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202581%79
July 202574%76
August 202586%79
September 202587%77
October 202587%95
November 202591%70
December 202586%65
January 202695%59
February 202694%54
March 202682%61
April 202684%74
May 202690%80

Same trip, other airports

Keep nerding

Based on 890 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.