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

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

82.0% of 1,103 official scheduled SDF-to-DEN flights arrived on time; 10.0% arrived at least 30 minutes late and 1.0% 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 SIGNALLower disruption
82.0%arrived on time
10.0%30+ min late
1.0%cancelled
1,103scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late5.3%all scheduled flights
120+ minutes late2.0%all scheduled flights
Diverted0.2%did not reach as scheduled
Average arrival+1.6 mincompleted flights

Which departure time was most reliable for SDF to DEN?

Among qualifying SDF-to-DEN departure window results, Early morning had the highest on-time rate: 92.6% of 299 flights. Evening was lowest at 64.8% across 71 flights.

Departure windowFlightsOn time30+ minCancelled
Early morning29992.6%4.3%1.0%
Late morning22788.5%7.0%0.4%
Afternoon50675.3%13.0%1.4%
Evening7164.8%21.1%0.0%

Which weekday was most reliable for SDF to DEN?

Among qualifying SDF-to-DEN weekday results, Wednesday had the highest on-time rate: 86.5% of 156 flights. Monday was lowest at 78.8% across 156 flights.

DayFlightsOn time30+ minCancelled
Monday15678.8%10.3%1.3%
Tuesday15985.5%10.1%0.0%
Wednesday15686.5%7.7%1.3%
Thursday15780.3%12.1%0.0%
Friday15679.5%11.5%0.0%
Saturday15684.0%9.6%1.9%
Sunday16379.8%8.6%2.5%

Which airline was most reliable for SDF to DEN?

Among qualifying SDF-to-DEN airline results, United Airlines had the highest on-time rate: 83.7% of 731 flights. Southwest Airlines was lowest at 78.8% across 372 flights.

AirlineFlightsOn time30+ minCancelled
United Airlines73183.7%9.2%1.0%
Southwest Airlines37278.8%11.6%1.1%

Which month was most reliable for SDF to DEN?

Among qualifying SDF-to-DEN month results, September 2025 had the highest on-time rate: 92.2% of 90 flights. December 2025 was lowest at 68.8% across 93 flights.

MonthFlightsOn time30+ minCancelled
July 20259781.4%12.4%0.0%
August 20259478.7%13.8%0.0%
September 20259092.2%3.3%0.0%
October 20259384.9%6.5%0.0%
November 20258989.9%3.4%2.2%
December 20259368.8%21.5%0.0%
January 20269382.8%8.6%6.5%
February 20268479.8%14.3%0.0%
March 20269380.6%15.1%1.1%
April 20269287.0%4.3%1.1%
May 20269584.2%4.2%0.0%
June 20269074.4%12.2%1.1%

What drove SDF to DEN delay minutes?

Airline was the largest recorded SDF-to-DEN delay category, accounting for 43.4% of 11,354 BTS-attributed delay minutes during July 2025–June 2026.

Airline43.4%
Late aircraft24.0%
National airspace29.9%
Weather2.8%
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.