The calculated distance (air line) between Wiener Neudorf and Neusiedl am See is approximately 26 miles respectively 42 kilometers.
By car or train, the actual journey to Neusiedl am See is certainly longer, as only the direct route (as the crow flies) between Wiener Neudorf and Neusiedl am See has been calculated here.
Air line (approximately)
42 kilometers
23 nautical miles