The calculated distance (air line) between Pyin Oo Lwin and Yamethin is approximately 113 miles respectively 181 kilometers.
By car or train, the actual journey to Yamethin is certainly longer, as only the direct route (as the crow flies) between Pyin Oo Lwin and Yamethin has been calculated here.
Air line (approximately)
181 kilometers
98 nautical miles