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