The calculated distance (air line) between Leinefelde-Worbis and Dortmund is approximately 123 miles respectively 199 kilometers.
By car or train, the actual journey to Dortmund is certainly longer, as only the direct route (as the crow flies) between Leinefelde-Worbis and Dortmund has been calculated here.
Air line (approximately)
199 kilometers
107 nautical miles