The calculated distance (air line) between Biskra and Aïn Oulmene is approximately 78 miles respectively 126 kilometers.
By car or train, the actual journey to Aïn Oulmene is certainly longer, as only the direct route (as the crow flies) between Biskra and Aïn Oulmene has been calculated here.
Air line (approximately)
126 kilometers
68 nautical miles