The calculated distance (air line) between Al Munayzilah and Al Qaţīf is approximately 84 miles respectively 136 kilometers.
By car or train, the actual journey to Al Qaţīf is certainly longer, as only the direct route (as the crow flies) between Al Munayzilah and Al Qaţīf has been calculated here.
Air line (approximately)
136 kilometers
73 nautical miles