The calculated distance (air line) between Mukharram al Fawqānī and Tadmur is approximately 70 miles respectively 113 kilometers.
By car or train, the actual journey to Tadmur is certainly longer, as only the direct route (as the crow flies) between Mukharram al Fawqānī and Tadmur has been calculated here.
Air line (approximately)
113 kilometers
61 nautical miles