Smaller tour operators like Olympic tend not to charter a whole aircraft for themselves (similar to the likes of Libra, Kosmar etc). It does happen occasionally with more popular services like LCA/PFO, but these tour operators tend to share capacity to Greek Islands. Shame, I think a greater capacity and availability of such routes would prove popular - though Geordies can be a bit unadventurous and stick to ALC, PMI and AGP!?
On the note of Olympic, the flight details on their website have not been updated since S08 went on sale so poosibly ammendments will be made in due course.