The calculated distance (air line) between Cha-am and Phra Pradaeng is approximately 71 miles respectively 113 kilometers.
By car or train, the actual journey to Phra Pradaeng is certainly longer, as only the direct route (as the crow flies) between Cha-am and Phra Pradaeng has been calculated here.
Air line (approximately)
113 kilometers
61 nautical miles