IAD → SMF: cancellations & delays
Over Jan 2023 - Apr 2026, 1.1% of Washington Dulles International Airport (IAD) to Sacramento International Airport (SMF) flights were cancelled and 22.2% arrived at least 15 minutes late, across 1,061 flights, flown by UA. Cancellations peak in July.
Check today's live IAD departures →Airport pages: Washington Dulles International Airport (IAD) · Sacramento International Airport (SMF)
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.