The calculated distance (air line) between Sant Cristòfol de les Fonts and Sant Martí is approximately 54 miles respectively 87 kilometers.
By car or train, the actual journey to Sant Martí is certainly longer, as only the direct route (as the crow flies) between Sant Cristòfol de les Fonts and Sant Martí has been calculated here.
Air line (approximately)
87 kilometers
47 nautical miles