John F. Kennedy International Airport (JFK) is one of the busiest airports in the world, and its listings include both ETAS and ETDS. ETAS stands for Estimated Time of Arrival and is the estimated time that a plane will arrive at the airport. ETDS stands for Estimated Time of Departure and is the estimated time that a plane will depart from the airport. Both ETAS and ETDS are important for travelers to know when planning their trips.