The calculated distance (air line) between Phan Thong and Krathum Baen is approximately 58 miles respectively 93 kilometers.
By car or train, the actual journey to Krathum Baen is certainly longer, as only the direct route (as the crow flies) between Phan Thong and Krathum Baen has been calculated here.
Air line (approximately)
93 kilometers
50 nautical miles