The calculated distance (air line) between Bou Hanifia el Hamamat and Blida is approximately 180 miles respectively 289 kilometers.
By car or train, the actual journey to Blida is certainly longer, as only the direct route (as the crow flies) between Bou Hanifia el Hamamat and Blida has been calculated here.
Air line (approximately)
289 kilometers
156 nautical miles