The calculated distance (air line) between Höchst im Odenwald and Dortmund is approximately 136 miles respectively 219 kilometers.
By car or train, the actual journey to Dortmund is certainly longer, as only the direct route (as the crow flies) between Höchst im Odenwald and Dortmund has been calculated here.
Air line (approximately)
219 kilometers
118 nautical miles