The data dictionary for hflights is given below.

. Year, Month, DayofMonth: date of departure . DayOfWeek: day of week of departure (useful for removing weekend effects) . DepTime, ArrTime: departure and arrival times (in local time, hhmm) . UniqueCarrier: unique abbreviation for a carrier . FlightNum: flight number . TailNum: airplane tail number . ActualElapsedTime: elapsed time of flight, in minutes . AirTime: flight time, in minutes . ArrDelay, DepDelay: arrival and departure delays, in minutes . Origin, Dest origin and destination airport codes . Distance: distance of flight, in miles . TaxiIn, TaxiOut: taxi in and out times in minutes . Cancelled: cancelled indicator: 1 = Yes, 0 = No . CancellationCode: reason for cancellation: A = carrier, B = weather, C = national air system, D = security . Diverted: diverted indicator: 1 = Yes, 0 = No