The calculated distance (air line) between Spittal an der Drau and Mariahilf is approximately 164 miles respectively 265 kilometers.
By car or train, the actual journey to Mariahilf is certainly longer, as only the direct route (as the crow flies) between Spittal an der Drau and Mariahilf has been calculated here.
Air line (approximately)
265 kilometers
143 nautical miles