The calculated distance (air line) between Sétif and Aïn Oussera is approximately 150 miles respectively 241 kilometers.
By car or train, the actual journey to Aïn Oussera is certainly longer, as only the direct route (as the crow flies) between Sétif and Aïn Oussera has been calculated here.
Air line (approximately)
241 kilometers
130 nautical miles