The calculated distance (air line) between Gerasdorf bei Wien and Langenzersdorf is approximately 5 miles respectively 8 kilometers.
By car or train, the actual journey to Langenzersdorf is certainly longer, as only the direct route (as the crow flies) between Gerasdorf bei Wien and Langenzersdorf has been calculated here.
Air line (approximately)
8 kilometers
4 nautical miles