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