The calculated distance (air line) between Hammam Bou Hadjar and Tlemcen is approximately 40 miles respectively 64 kilometers.
By car or train, the actual journey to Tlemcen is certainly longer, as only the direct route (as the crow flies) between Hammam Bou Hadjar and Tlemcen has been calculated here.
Air line (approximately)
64 kilometers
35 nautical miles