The calculated distance (air line) between Ban Phaeo and Krathum Baen is approximately 11 miles respectively 18 kilometers.
By car or train, the actual journey to Krathum Baen is certainly longer, as only the direct route (as the crow flies) between Ban Phaeo and Krathum Baen has been calculated here.
Air line (approximately)
18 kilometers
10 nautical miles