The calculated distance (air line) between Saint-Yrieix-sur-Charente and Le Mans is approximately 161 miles respectively 259 kilometers.
By car or train, the actual journey to Le Mans is certainly longer, as only the direct route (as the crow flies) between Saint-Yrieix-sur-Charente and Le Mans has been calculated here.
Air line (approximately)
259 kilometers
140 nautical miles