The calculated distance (air line) between Stourport-on-Severn and Halesowen is approximately 12 miles respectively 20 kilometers.
By car or train, the actual journey to Halesowen is certainly longer, as only the direct route (as the crow flies) between Stourport-on-Severn and Halesowen has been calculated here.
Air line (approximately)
20 kilometers
11 nautical miles