I need to know the closest airport to this location...more info in details. I hope you know spanish.?

(I hope you speak spanish) Ok, so my cousin lives in Mexico now and she wants my family and me to visit her. But there's a huge problem, we've never been there. All she told me is this "En Ajusco, la zona sur del Distrito Federal en la Ciudad de Mexico mas arriva del Pedregal" She hasn't been living in Mexico long so she doesn't know either. Can you help us by letting us know whats the closest airport there or what airport is right there? She wants us to visit early.