The calculated distance (air line) between Ostseebad Kühlungsborn and Marienthal is approximately 79 miles respectively 128 kilometers.
By car or train, the actual journey to Marienthal is certainly longer, as only the direct route (as the crow flies) between Ostseebad Kühlungsborn and Marienthal has been calculated here.
Air line (approximately)
128 kilometers
69 nautical miles