The calculated distance (air line) between Derā Nānak and Ludhiāna is approximately 92 miles respectively 148 kilometers.
By car or train, the actual journey to Ludhiāna is certainly longer, as only the direct route (as the crow flies) between Derā Nānak and Ludhiāna has been calculated here.
Air line (approximately)
148 kilometers
80 nautical miles