The calculated distance (air line) between Khlong Luang and Phra Phutthabat is approximately 47 miles respectively 75 kilometers.
By car or train, the actual journey to Phra Phutthabat is certainly longer, as only the direct route (as the crow flies) between Khlong Luang and Phra Phutthabat has been calculated here.
Air line (approximately)
75 kilometers
41 nautical miles