My vote has to go to Paris Beauvais (BVA). A few weeks ago I arrived at 7.30am for a 9.30am flight. By the time I had checked in, queued to get past the single passport control window in operation and then waited another while to get through security, I walked straight onto the plane from security. This airport was designed for a few flights a week, not the several dozen it now caters for every day.