Demand for global air freight, measured in freight tonne kilometers, rose 12.1 percent in August, driven by a rise in global trade.
Capacity rose more slowly at 4.7 percent, helping to boost the industry-wide load factor, IATA said.
"The current IATA forecast of 7.5 percent growth in air freight demand for 2017 appears to have significant upside potential even if we are approaching a cyclical peak," the industry body said in a statement.
(Reporting by Daria Kowalewska; Editing by Victoria Bryan)