The calculated distance (air line) between Bayt al Faqīh and Dhamār is approximately 72 miles respectively 116 kilometers.
By car or train, the actual journey to Dhamār is certainly longer, as only the direct route (as the crow flies) between Bayt al Faqīh and Dhamār has been calculated here.
Air line (approximately)
116 kilometers
63 nautical miles