The calculated distance (air line) between Kham Sakae Saeng and Krathum Baen is approximately 173 miles respectively 278 kilometers.
By car or train, the actual journey to Krathum Baen is certainly longer, as only the direct route (as the crow flies) between Kham Sakae Saeng and Krathum Baen has been calculated here.
Air line (approximately)
278 kilometers
150 nautical miles