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