I think they are about 150 miles apart.

Well Olu Deniz is 12 kilometres from Fethiye and from Gumbet, Fethiye is 265 kilometres (or 165 miles) and the travel time quoted is 4 hours. Hope that helps.

We were in Fethiye (nr Olu Deniz) last week and drove to Izmir which took 5 hours. We passed the turnoffs to Bodrum/Gumbet at about 4 hours or so. Long long drive and only the last half an hour was motorway. If you were driving Olu-Gumbet I think it would all be single/dual carriageway.