|Quoting HAJ_OW (Reply 1):|
crossing the Balkan someway towards Turkey
|Quoting Usflysagain (Reply 3):|
Here Try this site. It might be able to give you an idea more then an actual flight route.
|Quoting TripleDelta (Reply 2):|
If you indeed do get routed down here (which isn't all that unlikely), you'll most probably be taking airway UB5, which goes all the way down to Bulgaria and is one of the major and frequently used trans-Balkan airways. In this case, you can expect to fly over Slovenia, Croatia, Bosnia and Herzegovina, Serbia and Montenegro and Bulgaria.
|Quoting Joshdean (Reply 9):|
The airline is BA, anyone know if they would allow them???