Kosmar Greek Holidays had seen Tyrolean AW operate their Dash 7's into the greek Islands namely Paros and Naxos (next to mykonos) and talked to London City Airways in 1987 about a possible charter flight on a Friday night from LCY to PAS using a 50 seat Dash 7
the premium cost would have attracted the passengers wanting to go direct to Paros or Naxos by avoiding a LGW-ATH night flight then a 7 hour ferry from Piraeus port to the islands - there were no fast ferries then only the conventional car ferries of dubious origin
back then the Friday night ATH charters were often seriously delayed - the norm was 12 hours or more either ATC or Tech, or both! - many were op'd by KT TriStars or Dan Air and Amberair and their AOG reputation went before them especially at weekends in july and and august causing the pax to miss the 7am ferries to the islands and losing 2 days of their holiday
after much discussion with LCYairways we decided not to go ahead as fuel costs went up due Middle East issues and the operation was although exciting and quite doable it needed careful planning for ops and crewing
BA (CF) now successfully operate LCY to both mykonos and further down to santorini with the EMB jets (skiathos too i think)