How long and where to - all depends on how much time you can spare for your holiday and your preferred route.
Under normal circumstances, in a week you could cruise from:

* Fethiye to Kekova via Aegean islands
* From Fethiye to Marmaris and back
* From Bodrum to Fethiye
* From Fethiye to Antalya

 

Day 1 - Preboard evening prior to sailing in Fethiye. Breakfast on board with sailing to Gemiler Island and excursion to Ölüdeniz. Return to Gemiler Island for dinner and overnight.

Day 2 - Breakfast on board with sailing to Yediburun for lunch and continued sailing to Kalkan for dinner and overnight.

Day 3 - Breakfast on board followed by excursion to Xanthos ruins and Patara Beach. Lunch and return to Kalkan with continued sailing to Kas for dinner and overnight.

Day 4 - Breakfast on board with sailing to Golf of Kekova for lunch. Excursion to the Castle and Sunken City. Dinner and overnight in nearby Karalos Bay.

Day 5 - Breakfast on board with sailing to Demre and excursion to St. Nicholas's Church and Myra. Lunch and continued sailing to Finike for dinner and overnight.

Day 6 - Breakfast in Finike with sailing to Adrasan Bay for lunch. Exploration of small bays near Olympus with dinner and overnight near Olympus in the bay of Porta Ceneviz.

Day 7 - Breakfast on board followed by excursion to Olympus ruins. Sailing to Kemer for lunch and disembarkation. Optional disembarkation in Fethiye or Göcek. Transfer to Antalya or Dalaman Airport as needed.