International Consolidated Airlines Group (IAG), the airline formed by the merger of British Airways and Iberia Airlines, saw an upswing in passenger traffic in June, driven by growth in its long-haul premium segment. The company said group traffic, which is measured in revenue passenger kilometres, rose by 9.2%, while capacity, measured in available seat kilometres, was up by 6.8%. However, IAG brought to notice that the apparent strong improvement in performance was because numbers from last year were depressed by the disruption at British Airways and the network restructuring in Iberia Airlines.For June, IAG reported a 25.2% growth in group premium traffic, while it recorded a 6.7% growth in non-premium traffic. Passengers carried domestically, within the UK and Spain, slipped about 15%, whereas the group noted a rise in passenger traffic in North America, Latin America and other parts of Europe. Shares of IAG closed up 0.6% at 259.4p in London. AR