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