The calculated distance (air line) between Aranyaprathet and Krathum Baen is approximately 151 miles respectively 242 kilometers.
By car or train, the actual journey to Krathum Baen is certainly longer, as only the direct route (as the crow flies) between Aranyaprathet and Krathum Baen has been calculated here.
Air line (approximately)
242 kilometers
131 nautical miles