The calculated distance (air line) between Stoke-on-Trent and Sunderland is approximately 135 miles respectively 218 kilometers.
By car or train, the actual journey to Sunderland is certainly longer, as only the direct route (as the crow flies) between Stoke-on-Trent and Sunderland has been calculated here.
Air line (approximately)
218 kilometers
118 nautical miles