The calculated distance (air line) between Bonn and Ars-sur-Moselle is approximately 123 miles respectively 198 kilometers.
By car or train, the actual journey to Ars-sur-Moselle is certainly longer, as only the direct route (as the crow flies) between Bonn and Ars-sur-Moselle has been calculated here.
Air line (approximately)
198 kilometers
107 nautical miles