The calculated distance (air line) between Tha Ruea and Khlong Luang is approximately 35 miles respectively 57 kilometers.
By car or train, the actual journey to Khlong Luang is certainly longer, as only the direct route (as the crow flies) between Tha Ruea and Khlong Luang has been calculated here.
Air line (approximately)
57 kilometers
31 nautical miles