The calculated distance (air line) between Bexhill-on-Sea and Southend-on-Sea is approximately 49 miles respectively 78 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 Bexhill-on-Sea and Southend-on-Sea has been calculated here.
Air line (approximately)
78 kilometers
42 nautical miles