The calculated distance (air line) between Landau in der Pfalz and Bochum is approximately 163 miles respectively 262 kilometers.
By car or train, the actual journey to Bochum is certainly longer, as only the direct route (as the crow flies) between Landau in der Pfalz and Bochum has been calculated here.
Air line (approximately)
262 kilometers
141 nautical miles