The calculated distance (air line) between North Baddesley and Southend-on-Sea is approximately 101 miles respectively 163 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 North Baddesley and Southend-on-Sea has been calculated here.
Air line (approximately)
163 kilometers
88 nautical miles