The calculated distance (air line) between Bayt Kāḩil and Rafaḩ is approximately 52 miles respectively 84 kilometers.
By car or train, the actual journey to Rafaḩ is certainly longer, as only the direct route (as the crow flies) between Bayt Kāḩil and Rafaḩ has been calculated here.
Air line (approximately)
84 kilometers
45 nautical miles