The calculated distance (air line) between Madīnat an Naşr and Bilqās is approximately 79 miles respectively 128 kilometers.
By car or train, the actual journey to Bilqās is certainly longer, as only the direct route (as the crow flies) between Madīnat an Naşr and Bilqās has been calculated here.
Air line (approximately)
128 kilometers
69 nautical miles