The calculated distance (air line) between Huai Yot and Surat Thani is approximately 96 miles respectively 154 kilometers.
By car or train, the actual journey to Surat Thani is certainly longer, as only the direct route (as the crow flies) between Huai Yot and Surat Thani has been calculated here.
Air line (approximately)
154 kilometers
83 nautical miles