The nearest airport is CGN - Cologne Koln Bonn, located 14.5 km south west of Clef.
Other airports nearby include DUS - Duesseldorf Dusseldorf (53.1 km north west), ESS - Essen Mulheim (56.4 km north west), MGL - Moenchengladbach Monchengladbach (63.9 km north west), DTM - Dortmund (66.9 km north),