IAD → DEN: cancellations & delays
Over Jan 2023 - Apr 2026, 0.9% of Washington Dulles International Airport (IAD) to Denver International Airport (DEN) flights were cancelled and 19.4% arrived at least 15 minutes late, across 10,705 flights, flown by UA, WN. Cancellations peak in January.
Check today's live IAD departures →Airport pages: Washington Dulles International Airport (IAD) · Denver International Airport (DEN)
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.