DEN → IAD: cancellations & delays
Over Jan 2023 - Apr 2026, 1.1% of Denver International Airport (DEN) to Washington Dulles International Airport (IAD) flights were cancelled and 21.9% arrived at least 15 minutes late, across 10,674 flights, flown by UA, WN. Cancellations peak in January.
Check today's live DEN departures →Airport pages: Denver International Airport (DEN) · Washington Dulles International Airport (IAD)
Rates are historical averages from U.S. DOT (BTS) on-time records; a specific flight's live estimate can differ with weather and the day's disruptions.