Hi Luigi!
Is about 95/98 miles short distance and 115/120 long.
If the weather is bad you take the long way (nearer to the islands).
Roughly it takes in reasonable weather (force 4 NNE or force 4 NNW about) 4 hours to travel a distance of about 95/98 miles.
Is nicer in the summer and with company.
Luigi something else stavo controllando le miglia e da Otranto a Kerkira sono di circa 56 miglia e a Kerkyra porto 60+ miglia.