The calculated distance (air line) between Kuala Lumpur and Batu Pahat is approximately 124 miles respectively 199 kilometers.
By car or train, the actual journey to Batu Pahat is certainly longer, as only the direct route (as the crow flies) between Kuala Lumpur and Batu Pahat has been calculated here.
Air line (approximately)
199 kilometers
107 nautical miles