I have been to Lima airport twice (November last year), and that's enough for me! Thank God I allowed 3.5 hours transit at Lima for Scl-Lim-Cuz otherwise we may not have made it....we parked at some remote bay, and had to wait ages for a bus....when one finally did arrive, it looked like a mini bus
, and I kid you not, it was the only bus used to ferry a full 767 to the terminal...worse was to follow, after standing in an immigration queue for 1.5 hours, the crowd stated abusing (in Spanish) an official in a jacket and tie who opened up the diplomatic channel for us, and we finally got through immigration. Checking in for the domestic flight to Cusco was hellish til I found the premium checkin line as an OW emerald...we won't be rushing back to Lima airport or the city in a hurry (having now visited Machu Picchu)!!