The calculated distance (air line) between Benicàssim and Oropesa del Mar is approximately 5 miles respectively 8 kilometers.
By car or train, the actual journey to Oropesa del Mar is certainly longer, as only the direct route (as the crow flies) between Benicàssim and Oropesa del Mar has been calculated here.
Air line (approximately)
8 kilometers
4 nautical miles