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