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

Denver, CO (DEN) to Louisville, KY (SDF) flight delay odds

75.2% of 1,102 official scheduled DEN-to-SDF flights arrived on time; 16.1% arrived at least 30 minutes late and 0.8% 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
75.2%arrived on time
16.1%30+ min late
0.8%cancelled
1,102scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late7.6%all scheduled flights
120+ minutes late3.2%all scheduled flights
Diverted0.0%did not reach as scheduled
Average arrival+9.9 mincompleted flights

Which departure time was most reliable for DEN to SDF?

Among qualifying DEN-to-SDF departure window results, Late morning had the highest on-time rate: 86.9% of 429 flights. Evening was lowest at 67.4% across 478 flights.

Departure windowFlightsOn time30+ minCancelled
Late morning42986.9%6.5%0.5%
Afternoon15973.6%12.6%0.6%
Evening47867.4%24.1%1.0%

Which weekday was most reliable for DEN to SDF?

Among qualifying DEN-to-SDF weekday results, Saturday had the highest on-time rate: 80.8% of 156 flights. Thursday was lowest at 67.5% across 157 flights.

DayFlightsOn time30+ minCancelled
Monday15676.3%10.9%0.6%
Tuesday15978.0%15.7%1.3%
Wednesday15676.9%14.7%0.6%
Thursday15767.5%22.3%0.0%
Friday15674.4%19.2%0.0%
Saturday15680.8%12.2%1.9%
Sunday16272.8%17.3%1.2%

Which airline was most reliable for DEN to SDF?

Among qualifying DEN-to-SDF airline results, United Airlines had the highest on-time rate: 80.4% of 731 flights. Southwest Airlines was lowest at 65.0% across 371 flights.

AirlineFlightsOn time30+ minCancelled
United Airlines73180.4%13.0%0.5%
Southwest Airlines37165.0%22.1%1.3%

Which month was most reliable for DEN to SDF?

Among qualifying DEN-to-SDF month results, April 2026 had the highest on-time rate: 88.0% of 92 flights. July 2025 was lowest at 51.5% across 97 flights.

MonthFlightsOn time30+ minCancelled
July 20259751.5%35.1%1.0%
August 20259469.1%24.5%0.0%
September 20259074.4%15.6%0.0%
October 20259381.7%7.5%0.0%
November 20258978.7%10.1%2.2%
December 20259375.3%21.5%0.0%
January 20269381.7%7.5%4.3%
February 20268481.0%11.9%0.0%
March 20269374.2%16.1%1.1%
April 20269288.0%5.4%0.0%
May 20269478.7%16.0%0.0%
June 20269070.0%20.0%1.1%

What drove DEN to SDF delay minutes?

Late aircraft was the largest recorded DEN-to-SDF delay category, accounting for 57.8% of 16,363 BTS-attributed delay minutes during July 2025–June 2026.

Airline26.2%
Late aircraft57.8%
National airspace14.5%
Weather1.5%
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.