For all cities with a population greater than five hundred thousand, Perth is closest to Adelaide and farthest from Boston (MA). The closest foreign city is Denpasar and the farthest domestic city is Gold Coast-Tweed. See below for the top 5 closest and farthest cities (domestically, internationally and by continent) and to see which cities, if any, Perth is the closest and farthest to. Filter to include all cities over 100k, 500k or 1 million in population.