The calculated distance (air line) between Lahr and Souffelweyersheim is approximately 21 miles respectively 34 kilometers.
By car or train, the actual journey to Souffelweyersheim is certainly longer, as only the direct route (as the crow flies) between Lahr and Souffelweyersheim has been calculated here.
Air line (approximately)
34 kilometers
18 nautical miles