The calculated distance (air line) between Tādif and Deir ez-Zor is approximately 162 miles respectively 261 kilometers.
By car or train, the actual journey to Deir ez-Zor is certainly longer, as only the direct route (as the crow flies) between Tādif and Deir ez-Zor has been calculated here.
Air line (approximately)
261 kilometers
141 nautical miles