We are traveling from Santorini to Crete on October 16 and would like to take a high speed ferry but we cannot find information on the schedule. I tried the Hellenic Seaways site and also called them but all I got was a machine that spoke only Greek.
There will be NO ferry between Santorini and Crete on October 16. You'll either have to make that trip on the 15th or the 17th. http://www.gtp.gr
You need to recognize that the island start to shut down around mid Oct because most tourists are gone. The schedules for ferries becomes very limited and many hotels will reduce or close for the season.