The calculated distance (air line) between Khlong Luang and Kaeng Khoi is approximately 43 miles respectively 69 kilometers.
By car or train, the actual journey to Kaeng Khoi is certainly longer, as only the direct route (as the crow flies) between Khlong Luang and Kaeng Khoi has been calculated here.
Air line (approximately)
69 kilometers
37 nautical miles