The calculated distance (air line) between Jannātah and Bayt Ḩānūn is approximately 41 miles respectively 66 kilometers.
By car or train, the actual journey to Bayt Ḩānūn is certainly longer, as only the direct route (as the crow flies) between Jannātah and Bayt Ḩānūn has been calculated here.
Air line (approximately)
66 kilometers
36 nautical miles