Flight delay is separated into reportable, non-reportable, and international delay.
Non-reportable is not recorded in the database. Delay is separated as departure, arrival, and en route. Such delays include delays due to weather conditions at airports and en route, FAA and non-FAA equipment malfunctions, the volume of traffic at an airport, reduction to runway capacity, and other factors. International delays are due to delay caused by initiatives imposed by facilities outside the United States. Delays are broadly categorized as terminal or en route delays.