BTS DATA COMPLETE THROUGH JUNE 2026HISTORICAL ODDS · NOT LIVE FLIGHT STATUS
DelayOddsKnow the route before you book
MDW→SDF

Chicago, IL (MDW) to Louisville, KY (SDF) flight delay odds

79.2% of 990 official scheduled MDW-to-SDF flights arrived on time; 12.0% arrived at least 30 minutes late and 1.7% were cancelled during July 2025–June 2026.

Source: U.S. Bureau of Transportation Statistics · Reporting window: July 2025–June 2026 · Updated September 16, 2026

HISTORICAL ROUTE SIGNALGenerally reliable
79.2%arrived on time
12.0%30+ min late
1.7%cancelled
990scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late6.1%all scheduled flights
120+ minutes late1.8%all scheduled flights
Diverted0.0%did not reach as scheduled
Average arrival+3.6 mincompleted flights

Which departure time was most reliable for MDW to SDF?

Among qualifying MDW-to-SDF departure window results, Early morning had the highest on-time rate: 90.2% of 132 flights. Night was lowest at 56.9% across 51 flights.

Departure windowFlightsOn time30+ minCancelled
Early morning13290.2%4.5%1.5%
Late morning21787.6%5.5%2.3%
Afternoon28279.8%11.7%0.7%
Evening30871.8%18.8%1.9%
Night5156.9%19.6%3.9%

Which weekday was most reliable for MDW to SDF?

Among qualifying MDW-to-SDF weekday results, Wednesday had the highest on-time rate: 85.6% of 146 flights. Monday was lowest at 75.8% across 149 flights.

DayFlightsOn time30+ minCancelled
Monday14975.8%14.8%0.0%
Tuesday14783.0%10.9%0.7%
Wednesday14685.6%6.8%1.4%
Thursday15178.1%13.9%0.7%
Friday14777.6%12.9%2.0%
Saturday10877.8%11.1%5.6%
Sunday14276.1%13.4%2.8%

Which airline was most reliable for MDW to SDF?

Only Southwest Airlines met the MDW-to-SDF airline threshold: 79.2% of 990 scheduled flights arrived on time during July 2025–June 2026.

AirlineFlightsOn time30+ minCancelled
Southwest Airlines99079.2%12.0%1.7%

Which month was most reliable for MDW to SDF?

Among qualifying MDW-to-SDF month results, April 2026 had the highest on-time rate: 89.5% of 86 flights. July 2025 was lowest at 60.6% across 104 flights.

MonthFlightsOn time30+ minCancelled
July 202510460.6%26.0%2.9%
August 20258982.0%12.4%0.0%
September 20258687.2%4.7%0.0%
October 20258984.3%7.9%0.0%
November 20257884.6%7.7%5.1%
December 20257873.1%20.5%0.0%
January 20266382.5%9.5%6.3%
February 20265676.8%7.1%1.8%
March 20268574.1%16.5%3.5%
April 20268689.5%5.8%1.2%
May 20268683.7%9.3%0.0%
June 20269075.6%12.2%1.1%

What drove MDW to SDF delay minutes?

Late aircraft was the largest recorded MDW-to-SDF delay category, accounting for 58.9% of 10,579 BTS-attributed delay minutes during July 2025–June 2026.

Airline28.7%
Late aircraft58.9%
National airspace10.8%
Weather1.6%
Security0.0%
This is historical evidence, not a forecast.

Weather, schedules and operations change. For a trip you have already booked, use the airline or airport for live status.