I am interested in flying to santorie then to crete and back to athens. what airlines should i be looking at?

Olympic

Also Aegean Airlines

I know that your question is only about flying but I am going to mention this in hopes of being helpful.Some of the ferries that travel between these places do so at night and can include a room to sleep in. This can be cheaper and an efficient use of time.

I did this Last year ! Santorini and Crete are close to each other if the ferry runs when you go .This would be your best option . especially between Santorini & Crete. But if you go a little off season you may have to fly to from Athens and back to each Place . If you where to fly from Santorini you have to fly to Athens change planes then fly to Crete. It depends on time of the year I would also use Aegean Airlines newer Planes and better flight schedules . 100 times better than Olympic . I would Fly back to Athens from Crete

You should fly with Aegean Airlines. It's the best Greek airline, with good planes and employees; better than olympic.But i think that Olympic Airlines has just renovated its fleet because of the Olympic Games Athens 2004. Their websites are:
www.aegeanair.com for Aegean
www.olympic-airways.com for Olympic Airlines