South East England is the third largest region of England, with an area of 19,096 km2 (7,373 sq mi), and is also the most populous with a total population of over eight and a half million (2011). The region contains seven legally chartered cities: Brighton and Hove, Canterbury, Chichester, Oxford, Portsmouth, Southampton and Winchester. The region's close proximity to London and connections to several national motorways have led to South East England becoming a prosperous economic hub with the largest economy of any region in the UK, after London. The region is home to Gatwick Airport, the UK's second-busiest airport, and Heathrow Airport (the UK's busiest airport) is located adjacent to the region's boundary with Greater London. The coastline along the English Channel provides numerous ferry crossings to mainland Europe.