IAD → IAH: cancellations & delays
Over Jan 2023 - Apr 2026, 0.9% of Washington Dulles International Airport (IAD) to George Bush Intercontinental Airport (IAH) flights were cancelled and 19.6% arrived at least 15 minutes late, across 5,845 flights, flown by UA. Cancellations peak in January.
Check today's live IAD departures →Airport pages: Washington Dulles International Airport (IAD) · George Bush Intercontinental Airport (IAH)
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.