An increasing number of larger planes such as the Boeing 770-300 ER and Airbus A330-300, catering to growing passenger numbers, has led to an oversupply of cargo capacity at a time when demand for freight transport is lean, said IATA Director General Tony Tyler.
"Every time a new wide-body passenger aircraft takes to the air, it brings with it significant cargo-carrying capacity," he told reporters in Singapore.
In September IATA cut its forecast for growth in air cargo traffic this year to 0.9 per cent, down from an earlier estimate of 1.5 per cent, while predicting that passenger demand will grow at 5.0 per cent in 2013.
The Canada-based industry group said, however, that it expects a significant improvement in global cargo growth to 3.7 per cent next year.
Meanwhile Asia-Pacific freight carriers, which have been impacted by slowing demand for goods manufactured in the region, are facing stiff competition from Middle East rivals, Tyler said.