The calculated distance (air line) between Mariupol and Nyzhnia Krynka is approximately 76 miles respectively 122 kilometers.
By car or train, the actual journey to Nyzhnia Krynka is certainly longer, as only the direct route (as the crow flies) between Mariupol and Nyzhnia Krynka has been calculated here.
Air line (approximately)
122 kilometers
66 nautical miles