<a href="//www.terminalsguides.com/united-airlines/united-airlines-mex-terminal-mexico-city-international-airport/”">United Airlines MEX Terminal United Airlines operates from Terminal 1 at Mexico City International Airport (MEX). Serving as a hub for various domestic and international flights Terminal 1 offers modern facilities duty-free shopping and dining options. Passengers flying with United can expect efficient check-in procedures and convenient access to onward connections within Mexico and beyond.