The problem with BOG is that TK would face severe payload restrictions on a nonstop BOG IST because of altitude. Hence the triangle route solution in conjunction with PTY. I cannot see TK operating a similar triangle with a nonstop return from LIM. TK could also opt to extend the CCS terminators to LIM and route IST CCS LIM CCS IST.

An IST BCN/MAD LIM would commercially undoubtedly be a winner, but I don't know whether TK would be granted sixth freedom traffic rights for BCN LIM or MAD LIM, unless they can set up some legal construction so it would on paper be an UX flight.