The calculated distance (air line) between Donaghadee and Stoke-on-Trent is approximately 177 miles respectively 285 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 Donaghadee and Stoke-on-Trent has been calculated here.
Air line (approximately)
285 kilometers
154 nautical miles