The calculated distance (air line) between Sępólno Krajeńskie and Szczecin is approximately 123 miles respectively 197 kilometers.
By car or train, the actual journey to Szczecin is certainly longer, as only the direct route (as the crow flies) between Sępólno Krajeńskie and Szczecin has been calculated here.
Air line (approximately)
197 kilometers
106 nautical miles