The calculated distance (air line) between Bochum-Hordel and Blankenberge is approximately 175 miles respectively 281 kilometers.
By car or train, the actual journey to Blankenberge is certainly longer, as only the direct route (as the crow flies) between Bochum-Hordel and Blankenberge has been calculated here.
Air line (approximately)
281 kilometers
152 nautical miles