The calculated distance (air line) between Khlong Luang and Kamphaeng Phet is approximately 183 miles respectively 295 kilometers.
By car or train, the actual journey to Kamphaeng Phet is certainly longer, as only the direct route (as the crow flies) between Khlong Luang and Kamphaeng Phet has been calculated here.
Air line (approximately)
295 kilometers
159 nautical miles