The calculated distance (air line) between Melton Mowbray and Southend-on-Sea is approximately 109 miles respectively 175 kilometers.
By car or train, the actual journey to Southend-on-Sea is certainly longer, as only the direct route (as the crow flies) between Melton Mowbray and Southend-on-Sea has been calculated here.
Air line (approximately)
175 kilometers
94 nautical miles