Complex sentence: Despite its name, the airport is virtually equidistant between Frankfurt and Luxembourg--about to each city (by road); it is closer to Koblenz (about) and Mainz (about).
Split into simpler sentences: Despite its name, the airport is virtually equidistant between Frankfurt and Luxembourg-about to each city by road. It is closer to the German cities of Koblenz (about) and Mainz (about).