While many could see fewer planes flying over them others could see more and that will prove highly controversial.
The move will lead to the current flight path map being ripped up and redrawn and should also see delays cut, less fuel burnt and emissions reduced.
It is part of a new directive from Europe to simplify and make airspace more efficient and cope with increasing demand. It is not connected with the current review of runways by Sir Howard Davies.
But the move could allow for half a million more planes over the south east a year in a thirty year period. That is the Government forecast to allow for passenger growth.
Some flight paths could be altered or moved altogether. At the moment flight paths are over a wide area.
Using new technology there could be more accurate routes with increased numbers of flights concentrated on them. That means fewer planes flying over a wider area and more on the new routes.
More top news
Heathrow Airport has revealed some of the most popular goods flying through the airport this Christmas.
A man has been arrested on suspicion of murder after a 25 year-old woman died in Thatcham this morning.
A number of schools remain closed in Oxfordshire on Tuesday due to icy conditions. The Met Office has issued a weather warning for ice.