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

Detroit, MI (DTW) to Louisville, KY (SDF) flight delay odds

Historically, 76.2% of scheduled reportable flights on this direction arrived on time in July 2025–June 2026. The sample includes 1,190 flights.

HISTORICAL ROUTE SIGNALGenerally reliable
76.2%arrived on time
16.1%30+ min late
1.2%cancelled
1,190scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late9.2%all scheduled flights
120+ minutes late4.4%all scheduled flights
Diverted0.1%did not reach as scheduled
Average arrival+11.9 mincompleted flights

When is this route most reliable?

The same route can behave differently through the day. These are scheduled departure windows, not actual departure times. Small time windows with fewer than 40 flights are withheld.

Departure windowFlightsOn time30+ minCancelled
Early morning35080.0%12.9%1.4%
Afternoon42074.8%19.0%1.2%
Evening36572.9%17.0%1.1%
Night4290.5%4.8%0.0%

Weekday comparison

Day-of-week results use at least 30 scheduled flights per row. Look for broad patterns, not tiny percentage differences.

DayFlightsOn time30+ minCancelled
Monday18172.9%21.0%1.1%
Tuesday17377.5%12.1%0.6%
Wednesday16780.8%13.2%1.2%
Thursday17173.7%19.9%0.0%
Friday17471.8%19.0%1.7%
Saturday14983.2%8.7%2.0%
Sunday17574.9%17.7%1.7%

Airline comparison

Marketing-carrier results make codeshare flights easier to compare as travelers buy them. Dedicated route-airline reports require at least 160 flights.

AirlineFlightsOn time30+ minCancelled
SkyWest Airlines75374.9%17.8%1.5%
Republic Airways40879.2%13.0%0.7%
Spirit Airlines1883.3%11.1%0.0%
Delta Air Lines1145.5%27.3%0.0%

Monthly trend

Month-by-month results show whether a twelve-month average hides an unusual period.

MonthFlightsOn time30+ minCancelled
July 202512467.7%20.2%0.8%
August 202512383.7%7.3%0.0%
September 20257395.9%4.1%0.0%
October 202510590.5%6.7%0.0%
November 202510780.4%11.2%1.9%
December 20258860.2%28.4%2.3%
January 20268161.7%19.8%6.2%
February 20267672.4%21.1%0.0%
March 202610863.9%26.9%2.8%
April 202611679.3%14.7%0.9%
May 202611880.5%16.1%0.0%
June 20267177.5%19.7%0.0%

What drove reported delay minutes?

BTS cause minutes are reported for qualifying delayed flights. These shares describe recorded delay minutes—not the chance that a particular cause will affect your next flight.

Airline56.0%
Late aircraft15.9%
National airspace9.8%
Weather18.3%
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.