The calculated distance (air line) between Conflans-Sainte-Honorine and Angers is approximately 161 miles respectively 260 kilometers.
By car or train, the actual journey to Angers is certainly longer, as only the direct route (as the crow flies) between Conflans-Sainte-Honorine and Angers has been calculated here.
Air line (approximately)
260 kilometers
140 nautical miles