The calculated distance (air line) between Deir ez-Zor and Ath Thawrah is approximately 96 miles respectively 154 kilometers.
By car or train, the actual journey to Ath Thawrah is certainly longer, as only the direct route (as the crow flies) between Deir ez-Zor and Ath Thawrah has been calculated here.
Air line (approximately)
154 kilometers
83 nautical miles