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