A flight plan is a document that outlines the intended route and details for an aircraft's journey. It includes information such as the departure and arrival airports, waypoints, altitude, and estimated flight time. Pilots submit flight plans to air traffic control to ensure safe navigation and coordination with other aircraft. Flight plans are essential for both commercial and private flights. They help air traffic controllers manage airspace and provide necessary information for emergency situations. Additionally, flight plans can include details about the aircraft, such as its type and registration, as well as the number of passengers on board.