The calculated distance (air line) between Timmendorfer Strand and Bargteheide is approximately 28 miles respectively 45 kilometers.
By car or train, the actual journey to Bargteheide is certainly longer, as only the direct route (as the crow flies) between Timmendorfer Strand and Bargteheide has been calculated here.
Air line (approximately)
45 kilometers
24 nautical miles