For all cities with a population greater than five hundred thousand, Adan is closest to Sana'A and farthest from Acapulco. The closest foreign city is Asmara and the farthest domestic city is Sana'A. See below for the top 5 closest and farthest cities (domestically, internationally and by continent) and to see which cities, if any, Adan is the closest and farthest to. Filter to include all cities over 100k, 500k or 1 million in population.