Route
DEN → SDF
Denver International Airport Louisville Muhammad Ali International Airport
How punctual is this route?
- On-time arrivals
- 78.4%
- Less than 15 minutes late
- Cancelled
- 0.8%
- Of scheduled flights
- Average delay when late
- 64 min
- Flights arriving 15+ minutes late
- Flights tracked
- 1,095
- Scheduled flights in the period
What caused the delays
- Late-arriving aircraft 52%
- Airline (crew, maintenance, cleaning) 31%
- Air traffic control & airport 16%
- Extreme weather 1%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Show as table
| Month | On time | Flights |
|---|---|---|
| September 2025 | 74.4% | 90 |
| October 2025 | 81.7% | 93 |
| November 2025 | 80.5% | 89 |
| December 2025 | 75.3% | 93 |
| January 2026 | 85.4% | 93 |
| February 2026 | 81.0% | 84 |
| March 2026 | 75.0% | 93 |
| April 2026 | 88.0% | 92 |
| May 2026 | 78.7% | 94 |
| June 2026 | 70.8% | 90 |
| July 2026 | 76.9% | 91 |
| August 2026 | 72.8% | 93 |
Source: U.S. DOT Bureau of Transportation Statistics on-time data, September 2025 – August 2026. Covers flights operated by reporting U.S. carriers. About our data
Airlines on this route
| Airline | Flights | On time | Cancelled | Avg. delay when late |
|---|---|---|---|---|
| United Airlines | 730 | 83.0% | 0.7% | 73 min |
| Southwest Airlines | 365 | 69.0% | 1.1% | 55 min |
Delay odds by flight
How often each flight number arrived 15 or more minutes late over the last year.
-
UA1479
10% late · 365 flights
-
UA231
17% late · 126 flights
-
UA514
38% late · 77 flights
-
WN2413
18% late · 56 flights
-
UA2027
31% late · 46 flights
-
UA1847
17% late · 37 flights
-
WN1712
31% late · 35 flights
-
UA1293
12% late · 32 flights
-
WN2505
35% late · 31 flights
-
WN2105
14% late · 28 flights
-
WN3559
30% late · 28 flights
-
WN1664
41% late · 27 flights
-
UA421
29% late · 24 flights
-
UA1403
29% late · 21 flights
-
WN2755
20% late · 20 flights
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