The calculated distance (air line) between Rothwell and Melton Mowbray is approximately 24 miles respectively 39 kilometers.
By car or train, the actual journey to Melton Mowbray is certainly longer, as only the direct route (as the crow flies) between Rothwell and Melton Mowbray has been calculated here.
Air line (approximately)
39 kilometers
21 nautical miles