The calculated distance (air line) between Sievierodonetsk and Druzhkivka is approximately 49 miles respectively 79 kilometers.
By car or train, the actual journey to Druzhkivka is certainly longer, as only the direct route (as the crow flies) between Sievierodonetsk and Druzhkivka has been calculated here.
Air line (approximately)
79 kilometers
43 nautical miles