3.3 billion passengers in 2014

IASA: Nachhaltige Luftfahrt - Sustainable Aviation

Annual Report of the ICAO Council 2014

Montréal: In 2014 the total number of passengers carried on scheduled services rose to 3.3 billion, which is 5.5 per cent higher than last year, according to preliminary statistics compiled by ICAO. The number of departures reached 33 million globally in 2014, a 2.1 per cent increase compared to 2013.

see: http://www.icao.int/annual-report-2014/Pages/the-world-of-air-transport-in-2014.aspx