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