The calculated distance (air line) between Bayt al Faqīh and Saḩar is approximately 86 miles respectively 138 kilometers.
By car or train, the actual journey to Saḩar is certainly longer, as only the direct route (as the crow flies) between Bayt al Faqīh and Saḩar has been calculated here.
Air line (approximately)
138 kilometers
75 nautical miles