United Airlines DEN to SDF on-time performance
United Airlines nonstop flights from Denver to Louisville · Aug 2025 – Jul 2026
On-time arrivals
83%
arrived < 15 min late
Cancelled
0.5%
4 flights
Avg arrival delay
12 min
61 min when late
Rank on route
#1 of 2
route average 78% on time
Key facts
- United Airlines flights on DEN to SDF arrived on time 83% of the time in Aug 2025 – Jul 2026.
- 0.5% were cancelled, and 6% arrived an hour or more late.
- That ranks #1 of 2 airlines on this route, which averaged 78% on time overall.
- The largest source of delay minutes was late-arriving aircraft (48%).
On-time trend by month
Why this airline's flights were late
- Late-arriving aircraft48%
- Airline (crew, maintenance, cleaning, fueling)29%
- Air traffic control & airport congestion22%
- Extreme weather0%
- Security0%
Other airlines on DEN to SDF
- Southwest Airlines69% on time · 19 min avg delay
Full DEN to SDF comparison →
United Airlines on-time record across all routes →
730 United Airlines flights tracked on this route; 4 cancelled, 0 diverted.
Data: U.S. DOT Bureau of Transportation Statistics, Aug 2025 – Jul 2026 (12 months). Latest month published by BTS: July 2026. How we calculate this.