The calculated distance (air line) between Al Mawşil al Jadīdah and Eruh is approximately 110 miles respectively 177 kilometers.
By car or train, the actual journey to Eruh is certainly longer, as only the direct route (as the crow flies) between Al Mawşil al Jadīdah and Eruh has been calculated here.
Air line (approximately)
177 kilometers
96 nautical miles