Olympic Airlines (, Olympiakés Aerogrammés – OA), formerly named Olympic Airways for at least four decades, was the flag carrier airline of Greece with their head office in Athens. They operated services to 37 domestic destinations and to 32 destinations world-wide. Their main base was at Athens International Airport, with hubs at Thessaloniki International Airport, "Macedonia", Heraklion International Airport, "Nikos Kazantzakis"  and Rhodes International Airport, "Diagoras". Olympic Airlines also owned a base at London Heathrow International Airport. By December 2007, the airline employed about 8,500 staff.