The Line 1 runs from 3.05. to 24.05. each on Sat, from 28.05. to 31.08. Wed - Sun, then up to and including 27.09. only on Saturdays. The departure is in Bratislava to 7:15 clock and the trip takes about 1 hour 45 minutes (Vienna Arrival: 9:00 clock). Until 18:15 clock you will have the opportunity to the Vienna's sights, since then sets the line 1 and again from 19:45 to reach clock back Bratislava.