United Airlines DEN to IAD on-time performance
United Airlines nonstop flights from Denver to Washington · Aug 2025 – Jul 2026
On-time arrivals
85%
arrived < 15 min late
Cancelled
0.4%
11 flights
Avg arrival delay
11 min
65 min when late
Rank on route
#1 of 2
route average 81% on time
Key facts
- United Airlines flights on DEN to IAD arrived on time 85% of the time in Aug 2025 – Jul 2026.
- 0.4% were cancelled, and 5% arrived an hour or more late.
- That ranks #1 of 2 airlines on this route, which averaged 81% on time overall.
- The largest source of delay minutes was late-arriving aircraft (44%).
On-time trend by month
Why this airline's flights were late
- Late-arriving aircraft44%
- Airline (crew, maintenance, cleaning, fueling)31%
- Air traffic control & airport congestion23%
- Security1%
- Extreme weather1%
Other airlines on DEN to IAD
- Southwest Airlines66% on time · 18 min avg delay
Full DEN to IAD comparison →
United Airlines on-time record across all routes →
2,786 United Airlines flights tracked on this route; 11 cancelled, 1 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.