when you say "kent airport" which do you mean?
You have manston which is easy to find, its the only one with a tarmac runway, cant go wrong
then from their just head down the cliffs of dover, looking at the map head for hawkinge, their you will find another...aptly named...hawkinge!! which is a grass strip, but you will spot it easy enough, it has two runways crossing each other
just head further down the coast, though slighty more inland and you'll come to lympne