Save time when you're there and book a ticket for the train from Vienna airport to the center of the city.
After arriving at Vienna International Airport, just follow the green signs to the CAT, aka the City Airport Train. In just 16 minutes on the double-decker train, you'll arrive at Wien Mitte - Landstraße railway station with direct connection to the underground line in Vienna.
Sit back and relax in the comfortable seats of the double-decker carriages, and do a bit of trip-planning! Alternatively, there is usually an entertaining program to watch on the info screens. The short transfer time will pass by in a flash.