Vienna International Airport makes an important contribution to the economic development of the region. To ensure that this remains the case in future, the airport will need a third runway. At present there are two intersecting runways available for take-offs and landings. In terms of capacity, however, 1+1 does not equal 2 but only 1.6. It will not be possible to meet the anticipated demand for international flights with the existing two-runway system. The resultant bottlenecks threaten the future development of the airport and the region as a whole.