The calculated distance (air line) between Sen Monorom and Tbeng Meanchey is approximately 175 miles respectively 282 kilometers.
By car or train, the actual journey to Tbeng Meanchey is certainly longer, as only the direct route (as the crow flies) between Sen Monorom and Tbeng Meanchey has been calculated here.
Air line (approximately)
282 kilometers
152 nautical miles