The calculated distance (air line) between Nuea Khlong and Surat Thani is approximately 77 miles respectively 124 kilometers.
By car or train, the actual journey to Surat Thani is certainly longer, as only the direct route (as the crow flies) between Nuea Khlong and Surat Thani has been calculated here.
Air line (approximately)
124 kilometers
67 nautical miles