IAD Today
Pick Your Window
Late Morning vs Evening is a 55-point swing at IAD. The late morning block runs at 83%. If you have any say in your departure time, this is the biggest thing you can control.
Through the Day
vs Last Week
Down 19 points from last week (45% vs 64%). Arrivals down 12 points too. Thu was the worst day, Sun the best.
The Bigger Picture
IAD has been bouncing between 27% and 82%. Best day was Feb 19 at 82%. Worst was Mar 17 at 27%. The norm is 67-73%, which is just how IAD runs.
About IAD Delays
Washington Dulles International Airport has averaged 45% on-time departures this week, making it frequently delayed. Performance varies by time of day and weather conditions.
Washington Dulles International Airport is one of 179 FAA-monitored US airports with real-time delay tracking. Data includes departure and arrival on-time percentages, updated every 5 minutes, with historical trends available for the past 90 days.
Nearby alternatives include DCA (Ronald Reagan Washington National Airport), BWI (Baltimore/Washington International Thurgood Marshall Airport), MDT (Harrisburg International Airport) and RIC (Richmond International Airport). When IAD is experiencing delays, these airports may offer better on-time performance.
Early morning departures from Washington Dulles International Airport typically have the highest on-time rates. Delays tend to accumulate throughout the day as cascading effects from earlier disruptions compound. Check the 24-hour trend chart above for today's pattern.