IAD → ORD: cancellations & delays
Over Jan 2023 - Apr 2026, 0.9% of Washington Dulles International Airport (IAD) to Chicago O'Hare International Airport (ORD) flights were cancelled and 21.5% arrived at least 15 minutes late, across 5,911 flights, flown by UA, YX. Cancellations peak in July.
Check today's live IAD departures →Airport pages: Washington Dulles International Airport (IAD) · Chicago O'Hare International Airport (ORD)
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.