STT → IAD: cancellations & delays
Over Jan 2023 - Apr 2026, 1.1% of Cyril E. King Airport (STT) to Washington Dulles International Airport (IAD) flights were cancelled and 18.4% arrived at least 15 minutes late, across 1,046 flights, flown by UA. Cancellations peak in August.
Check today's live STT departures →Airport pages: Cyril E. King Airport (STT) · 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.