The calculated distance (air line) between Trenčín and Brezová pod Bradlom is approximately 28 miles respectively 45 kilometers.
By car or train, the actual journey to Brezová pod Bradlom is certainly longer, as only the direct route (as the crow flies) between Trenčín and Brezová pod Bradlom has been calculated here.
Air line (approximately)
45 kilometers
24 nautical miles