Boeing projects the world aircraft fleet will double over the next 20 years, according to the company's annual Current Market Outlook.

There is a growing mismatch between the performance of the passenger and cargo sides of the airline business, IATA has revealed. A 5.3-percent growth in passenger numbers in 2012, with a 3-percent improvement in yield, contrasts sharply with the 2-percent fall in both freight tonne-kilometers and cargo yield.