The calculated distance (air line) between Traiskirchen and Gerasdorf bei Wien is approximately 21 miles respectively 34 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 Traiskirchen and Gerasdorf bei Wien has been calculated here.
Air line (approximately)
34 kilometers
18 nautical miles