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