The calculated distance (air line) between Nong Bua and Khlong Luang is approximately 124 miles respectively 200 kilometers.
By car or train, the actual journey to Khlong Luang is certainly longer, as only the direct route (as the crow flies) between Nong Bua and Khlong Luang has been calculated here.
Air line (approximately)
200 kilometers
108 nautical miles