The calculated distance (air line) between Bayt al Faqīh and Zabīd is approximately 22 miles respectively 36 kilometers.
By car or train, the actual journey to Zabīd is certainly longer, as only the direct route (as the crow flies) between Bayt al Faqīh and Zabīd has been calculated here.
Air line (approximately)
36 kilometers
19 nautical miles