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