IATA said, however, that while the outlook for the rest of the year remained positive, there were signs that freight growth may be nearing a cyclical peak.
"For the third consecutive month demand for air freight grew at a faster pace than demand for air travel", said IATA Chief Executive Alexandre de Juniac.
Available capacity rose 3.7 percent in July.
Air freight, measured in freight-tonne-kilometres (FTKs), rose by double-digit percentages in July in Africa, Asia Pacific, Europe and North America.
(Reporting by Anna Serafin in Gdynia; editing by David Clarke)