The calculated distance (air line) between Santokhgarh and Ludhiāna is approximately 41 miles respectively 66 kilometers.
By car or train, the actual journey to Ludhiāna is certainly longer, as only the direct route (as the crow flies) between Santokhgarh and Ludhiāna has been calculated here.
Air line (approximately)
66 kilometers
36 nautical miles