The calculated distance (air line) between Erlangen and Röthenbach an der Pegnitz is approximately 13 miles respectively 21 kilometers.
By car or train, the actual journey to Röthenbach an der Pegnitz is certainly longer, as only the direct route (as the crow flies) between Erlangen and Röthenbach an der Pegnitz has been calculated here.
Air line (approximately)
21 kilometers
11 nautical miles