TCX did do Santorini certainly for 1 year after Xl went bust, possibly two. The Greek routes were always popular but most of the specialist Greek tour operators (Kosmar, Priceright etc.) have also gone bust leaving only Olympic who aren't big enough on their own it needs TOM, TCX or LS to move in too, and in answer to the previous post the LS 737-300 doesn't have the legs for Greece so they would need to use the 757 which has worked for them on Corfu, Kos and Rhodes but it probably too big for these routes?