The calculated distance (air line) between Umm Şalāl Muḩammad and Dukhān is approximately 39 miles respectively 63 kilometers.
By car or train, the actual journey to Dukhān is certainly longer, as only the direct route (as the crow flies) between Umm Şalāl Muḩammad and Dukhān has been calculated here.
Air line (approximately)
63 kilometers
34 nautical miles