Originally Posted by
IAN-UK
In Athens I don't know what lounge MS uses, but I'd hazard a guess at Aegean's.
A3/LH lounnges are in the Schengen area (on the left hand side of the terminal building). I believe both TK and MS use the ONASIS LOUNGE (which is the old OA lounge) in the non-Schengen area (on the right).