The calculated distance (air line) between Krems an der Donau and Floridsdorf is approximately 38 miles respectively 61 kilometers.
By car or train, the actual journey to Floridsdorf is certainly longer, as only the direct route (as the crow flies) between Krems an der Donau and Floridsdorf has been calculated here.
Air line (approximately)
61 kilometers
33 nautical miles