Vienna is 1 hour ahead of London. London uses GMT/BST while Vienna uses Central European Time (CET/CEST). When it's 12:00 PM in London, it's 1:00 PM in Vienna.
Both cities observe daylight saving time on the same schedule, so the 1-hour difference remains constant year-round.
Best calling time: 8:00 AM - 4:00 PM London time. This corresponds to 9:00 AM - 5:00 PM in Vienna, covering Austrian business hours.
Vienna is consistently ranked as one of the world's most livable cities. It hosts many international organizations, including OPEC and parts of the UN. Direct flights from London take about 2 hours.