Better traffic management would help. Too many airlines want their planes traveling during peak times early morning and late afternoon leaving little margin for error. Also, too many small aircraft take up precious airspace. Higher landing fees would shift many smaller aircraft to nearby airports that are less crowded. Customers Before Cargo.
Rules regarding tickets are also too cumbersome.
As The Crow Flies. The current air traffic control system funnels planes into what are, in effect, narrow roads in the sky . Too many airplanes waste time and fuel to get to these roadways. As current radar systems lack pinpoint accuracy, aircraft must be separated by five miles horizontally and 1,000 feet vertically. Use the Global Positioning System to broadcast plane positions to other aircraft and to controllers on the ground.