The calculated distance (air line) between Vilafranca del Penedès and Sant Martí is approximately 27 miles respectively 43 kilometers.
By car or train, the actual journey to Sant Martí is certainly longer, as only the direct route (as the crow flies) between Vilafranca del Penedès and Sant Martí has been calculated here.
Air line (approximately)
43 kilometers
23 nautical miles