Étampes-Mondésir Airfield (ICAO: LFOX) is a general aviation aerodrome located near Guillerval in the Essonne department, south of Paris in the Île-de-France region. It serves primarily private pilots, gliders, and light aircraft operations, and is not a commercial passenger airport. The airfield has deep historical roots in French aviation, as the Étampes area was a significant center of early flight activity in the early twentieth century. Today it remains an active hub for local flying clubs and recreational aviation, maintaining the region's long association with aeronautics. No scheduled commercial airline services operate from LFOX, and facilities are modest, catering to the needs of the general aviation community including fuel, maintenance, and training operations.