The calculated distance (air line) between Sidi Bel Abbes and Relizane is approximately 77 miles respectively 124 kilometers.
By car or train, the actual journey to Relizane is certainly longer, as only the direct route (as the crow flies) between Sidi Bel Abbes and Relizane has been calculated here.
Air line (approximately)
124 kilometers
67 nautical miles