The calculated distance (air line) between Market Harborough and Melton Mowbray is approximately 20 miles respectively 32 kilometers.
By car or train, the actual journey to Melton Mowbray is certainly longer, as only the direct route (as the crow flies) between Market Harborough and Melton Mowbray has been calculated here.
Air line (approximately)
32 kilometers
17 nautical miles