Skip to content
WanderNerd
Check a flight

Route Reliability

Louisville → Chicago

SDF–MDW · 271 miles · Louisville Muhammad Ali International Airport to Chicago Midway International Airport

86
Pretty Reliable
WanderNerd Reliability Score
86%
Arrive within 15 minutes
1 min
Average arrival delay
1.6%
Cancelled
1,001
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 1,001 flights. No comparison to make.

What the data says

Morning flights do better here.

SDF–MDW flights departing between 6–9 AM arrived on time 92% of the time, versus 78% between 6–9 PM.

Thursday is the weak spot.

SDF–MDW flights arrived on time 90% of the time on Saturdays. On Thursdays: 80%.

Slipping a little lately.

SDF–MDW flights arrived on time 81% of the time over the last three months in the data, compared with 86% in the three months before that.

Flights on this route

The breakdown

On-time by weekday
  • Mon82%(148 flights)
  • Tue88%(142 flights)
  • Wed88%(144 flights)
  • Thu80%(153 flights)
  • Fri86%(149 flights)
  • Sat90%(104 flights)
  • Sun86%(142 flights)
On-time by departure window
  • 6–9 AM92%(354 flights)
  • 9 AM–12 PM86%(58 flights)
  • 12–3 PM88%(163 flights)
  • 3–6 PM80%(91 flights)
  • 6–9 PM78%(293 flights)
  • 9 PM–12 AM87%(23 flights)
On-time trend by month
84%
May

Jun 90% → May 84% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202590%102
July 202578%99
August 202591%89
September 202594%86
October 202585%87
November 202590%73
December 202578%78
January 202685%60
February 202695%56
March 202677%83
April 202681%86
May 202684%83

Same trip, other airports

Keep nerding

Based on 1,001 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.