The calculated distance (air line) between Kaset Sombun and Khlong Luang is approximately 176 miles respectively 284 kilometers.
By car or train, the actual journey to Khlong Luang is certainly longer, as only the direct route (as the crow flies) between Kaset Sombun and Khlong Luang has been calculated here.
Air line (approximately)
284 kilometers
153 nautical miles