The calculated distance (air line) between Uthai Thani and Phasi Charoen is approximately 118 miles respectively 190 kilometers.
By car or train, the actual journey to Phasi Charoen is certainly longer, as only the direct route (as the crow flies) between Uthai Thani and Phasi Charoen has been calculated here.
Air line (approximately)
190 kilometers
103 nautical miles