Skip to content
WanderNerd
Check a flight

Route Reliability

Chicago → Louisville

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

82
Pretty Reliable
WanderNerd Reliability Score
80%
Arrive within 15 minutes
5 min
Average arrival delay
1.6%
Cancelled
1,002
Flights in the data

Data through May 2026.

Southwest Airlines is the only airline in this data on this route, arriving on time 80% of the time across 1,002 flights. No comparison to make.

What the data says

Morning flights do better here.

MDW–SDF flights departing between 6–9 AM arrived on time 92% of the time, versus 59% between 9 PM–12 AM.

Friday is doing you no favors.

MDW–SDF flights arrived on time 88% of the time on Wednesdays. On Fridays: 76%.

Ticking up lately.

MDW–SDF flights arrived on time 84% of the time over the last three months in the data, compared with 80% in the three months before that.

Flights on this route

The breakdown

On-time by weekday
  • Mon78%(153 flights)
  • Tue83%(143 flights)
  • Wed88%(145 flights)
  • Thu79%(154 flights)
  • Fri76%(148 flights)
  • Sat82%(102 flights)
  • Sun78%(141 flights)
On-time by departure window
  • 6–9 AM92%(112 flights)
  • 9 AM–12 PM91%(226 flights)
  • 12–3 PM81%(172 flights)
  • 3–6 PM73%(137 flights)
  • 6–9 PM76%(268 flights)
  • 9 PM–12 AM59%(71 flights)
On-time trend by month
84%
May

Jun 73% → May 84% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202573%102
July 202562%101
August 202582%89
September 202588%86
October 202585%89
November 202589%74
December 202573%78
January 202688%59
February 202678%55
March 202677%82
April 202691%85
May 202684%86

Same trip, other airports

Keep nerding

Based on 1,002 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.