The calculated distance (air line) between Al Faḩāḩīl and Salwá is approximately 15 miles respectively 24 kilometers.
By car or train, the actual journey to Salwá is certainly longer, as only the direct route (as the crow flies) between Al Faḩāḩīl and Salwá has been calculated here.
Air line (approximately)
24 kilometers
13 nautical miles