The calculated distance (air line) between Burg auf Fehmarn and Timmendorfer Strand is approximately 35 miles respectively 56 kilometers.
By car or train, the actual journey to Timmendorfer Strand is certainly longer, as only the direct route (as the crow flies) between Burg auf Fehmarn and Timmendorfer Strand has been calculated here.
Air line (approximately)
56 kilometers
30 nautical miles