The calculated distance (air line) between Johor Bahru and Subang Jaya is approximately 186 miles respectively 299 kilometers.
By car or train, the actual journey to Subang Jaya is certainly longer, as only the direct route (as the crow flies) between Johor Bahru and Subang Jaya has been calculated here.
Air line (approximately)
299 kilometers
161 nautical miles