City Airport Train (CAT) 16 minutes non-stop to Vienna city center With a journey time of only 16 minutes from Vienna International Airport to the city center, the City Airport Train is the fastest way to travel – without stress and traffic jams and in an environmentally friendly way. The CAT travels between Vienna Airport and Wien-Mitte station every thirty minutes from early morning to late at night, 365 days a year. Airport - City every 30 minutes between 6:08am - 11:38pm. City- Airport every 30 minutes between 5:37am - 11:07pm. Children under 15 years old are free to enter the City Airport Train.