The calculated distance (air line) between Palma and Sant Boi de Llobregat is approximately 127 miles respectively 204 kilometers.
By car or train, the actual journey to Sant Boi de Llobregat is certainly longer, as only the direct route (as the crow flies) between Palma and Sant Boi de Llobregat has been calculated here.
Air line (approximately)
204 kilometers
110 nautical miles