New York is exactly 6 hours behind Vienna year-round. When it's 6:00 PM in Vienna, it's 12:00 PM (noon) in New York. Both cities observe daylight saving time on similar schedules.
The 6-hour difference remains relatively constant throughout the year, with brief variations during DST transition weeks.
Optimal meeting window: 9:00 AM - 12:00 PM New York time (3:00 PM - 6:00 PM Vienna). Morning New York catches afternoon Vienna before end of business.
Vienna hosts many international organizations including the UN, IAEA, and OPEC. Austrian Airlines operates direct flights from JFK to Vienna in about 9 hours.