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