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