The calculated distance (air line) between Phanom Sarakham and Khlong Luang is approximately 52 miles respectively 84 kilometers.
By car or train, the actual journey to Khlong Luang is certainly longer, as only the direct route (as the crow flies) between Phanom Sarakham and Khlong Luang has been calculated here.
Air line (approximately)
84 kilometers
45 nautical miles