The calculated distance (air line) between Finkenstein am Faaker See and Mödling is approximately 155 miles respectively 249 kilometers.
By car or train, the actual journey to Mödling is certainly longer, as only the direct route (as the crow flies) between Finkenstein am Faaker See and Mödling has been calculated here.
Air line (approximately)
249 kilometers
134 nautical miles