The calculated distance (air line) between Ma‘ale Adummim and Ḩalḩūl is approximately 18 miles respectively 29 kilometers.
By car or train, the actual journey to Ḩalḩūl is certainly longer, as only the direct route (as the crow flies) between Ma‘ale Adummim and Ḩalḩūl has been calculated here.
Air line (approximately)
29 kilometers
16 nautical miles