The calculated distance (air line) between Phra Pradaeng and Khlong Luang is approximately 29 miles respectively 47 kilometers.
By car or train, the actual journey to Khlong Luang is certainly longer, as only the direct route (as the crow flies) between Phra Pradaeng and Khlong Luang has been calculated here.
Air line (approximately)
47 kilometers
25 nautical miles