The calculated distance (air line) between Guru Har Sahāi and Kahna Nau is approximately 46 miles respectively 73 kilometers.
By car or train, the actual journey to Kahna Nau is certainly longer, as only the direct route (as the crow flies) between Guru Har Sahāi and Kahna Nau has been calculated here.
Air line (approximately)
73 kilometers
40 nautical miles