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