Premium air travel was up 8.6 per cent in August, according to the International Air Transport Association (IATA). The increase reflects improving economic conditions in Europe and the US as well as a short-lived spike in demand due to Ramadan. The aviation body said that even after seasonal adjustments, such as religious holidays, premium travel was up about five per cent year-on-year, above the year-to-date growth of 3.4 per cent. Premium travel within Europe rose 7.2 per cent and within the North Atlantic it grew 5.7 per cent. IATA said that export orders also continue to rise, now at the fastest pace since May 2011, which is a positive sign for world trade growth.