The calculated distance (air line) between Souk Ahras and Bir el Ater is approximately 107 miles respectively 172 kilometers.
By car or train, the actual journey to Bir el Ater is certainly longer, as only the direct route (as the crow flies) between Souk Ahras and Bir el Ater has been calculated here.
Air line (approximately)
172 kilometers
93 nautical miles