High Quality Content by WIKIPEDIA articles! Flight planning is the process of producing a flight plan to describe a proposed aircraft flight. It involves two safety-critical aspects: fuel calculation, to ensure that the aircraft can safely reach the destination, and compliance with air traffic control requirements, to minimise the risk of mid-air collision. In addition, flight planners normally wish to minimise flight cost by appropriate choice of route, height, and speed, and by loading the minimum necessary fuel on board.