The calculated distance (air line) between Bayt Kāḩil and Jabālyā is approximately 34 miles respectively 55 kilometers.
By car or train, the actual journey to Jabālyā is certainly longer, as only the direct route (as the crow flies) between Bayt Kāḩil and Jabālyā has been calculated here.
Air line (approximately)
55 kilometers
30 nautical miles