The calculated distance (air line) between Hannover and Marburg an der Lahn is approximately 116 miles respectively 186 kilometers.
By car or train, the actual journey to Marburg an der Lahn is certainly longer, as only the direct route (as the crow flies) between Hannover and Marburg an der Lahn has been calculated here.
Air line (approximately)
186 kilometers
100 nautical miles