6 in London. Heathrow is a major hub for Europe and as such is at full capacity. Apart from London City which is small, the other London airports are a long way out. (Gatwick, could be as accurately called Brighton Airport as London,and Stanstead is as close to Cambridge as London). are a long way out. Birmingham, Manchester, Liverpool, Glasgow, Edinburgh are big cities but most of the others, (Blackpool, Bristol,, Aberdeen, Cardiff, Newquay, Southampton) have limited scheduled flights although may have lots of charter flights in the summer.