The calculated distance (air line) between Uthai Thani and Krathum Baen is approximately 120 miles respectively 194 kilometers.
By car or train, the actual journey to Krathum Baen is certainly longer, as only the direct route (as the crow flies) between Uthai Thani and Krathum Baen has been calculated here.
Air line (approximately)
194 kilometers
104 nautical miles