The calculated distance (air line) between Dūrā and Bayt Ḩānūn is approximately 29 miles respectively 47 kilometers.
By car or train, the actual journey to Bayt Ḩānūn is certainly longer, as only the direct route (as the crow flies) between Dūrā and Bayt Ḩānūn has been calculated here.
Air line (approximately)
47 kilometers
25 nautical miles