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