The calculated distance (air line) between Al Farwānīyah and Al Khafjī is approximately 66 miles respectively 107 kilometers.
By car or train, the actual journey to Al Khafjī is certainly longer, as only the direct route (as the crow flies) between Al Farwānīyah and Al Khafjī has been calculated here.
Air line (approximately)
107 kilometers
58 nautical miles