Do you mind if I ask what your problem with TK is? They're a rather good airline and, personally, I'd rather spend a couple of hours in the excellent lounge at IST than on a Flying Dolphin travelling to Kos. I'm a self-proclaimed expert of round-about routings, often just for fun, but even I wouldn't do that! Why not take a cheap flight Bodrum to IST (Pegasus, Atlas etc.) then the A3 (OA) Dash 8 from there?