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