The calculated distance (air line) between Purkersdorf and Gerasdorf bei Wien is approximately 15 miles respectively 24 kilometers.
By car or train, the actual journey to Gerasdorf bei Wien is certainly longer, as only the direct route (as the crow flies) between Purkersdorf and Gerasdorf bei Wien has been calculated here.
Air line (approximately)
24 kilometers
13 nautical miles