The calculated distance (air line) between Seaford and Stoke-on-Trent is approximately 183 miles respectively 294 kilometers.
By car or train, the actual journey to Stoke-on-Trent is certainly longer, as only the direct route (as the crow flies) between Seaford and Stoke-on-Trent has been calculated here.
Air line (approximately)
294 kilometers
158 nautical miles