The calculated distance (air line) between Erlangen and Lauf an der Pegnitz is approximately 13 miles respectively 22 kilometers.
By car or train, the actual journey to Lauf an der Pegnitz is certainly longer, as only the direct route (as the crow flies) between Erlangen and Lauf an der Pegnitz has been calculated here.
Air line (approximately)
22 kilometers
12 nautical miles