The calculated distance (air line) between Rüsselsheim and Limburg an der Lahn is approximately 32 miles respectively 51 kilometers.
By car or train, the actual journey to Limburg an der Lahn is certainly longer, as only the direct route (as the crow flies) between Rüsselsheim and Limburg an der Lahn has been calculated here.
Air line (approximately)
51 kilometers
28 nautical miles