The calculated distance (air line) between Sing Buri and Phra Pradaeng is approximately 85 miles respectively 137 kilometers.
By car or train, the actual journey to Phra Pradaeng is certainly longer, as only the direct route (as the crow flies) between Sing Buri and Phra Pradaeng has been calculated here.
Air line (approximately)
137 kilometers
74 nautical miles