Gatwick Airport has a frequent enough overnight service to be open all night with passengers waiting on the platforms. Manchester Airport doesn't. Southampton Airport Parkway platforms can't be closed off (although the station buildings (and the airport itself) are locked up).Are all major airport stations open 24-hours a day? The OP mentioned Manchester Airport which would be understandable seeing as it's the north's major airport hub even after the rise of more point-to-point flights, but what about the local Gatwick Airport station as well?