According to May results of the International Air Transport Association, Indian domestic traffic rose just 0.1 per cent year-over-year, but fell 2.7 per cent compared to April.
Besides, the average passenger load factor for Indian airlines stood at 76.8 per cent.
"The airline industry is fragile. Relief in oil prices provides some good news.
"Unfortunately, the softness in oil markets comes on the back of fears of deterioration in the European economy," said Tony Tyler, IATA's director general and chief executive officer.
He said business and consumer confidence was falling and the first signs of this can be seen in slowing demand and softer load factors.
"This does not bode well for industry profitability," he said.
"Airlines are expected to return a $3 billion profit in 2012 on $631 billion in revenues. That's a razor-thin 0.5 per cent margin," he said.
The West Asian carriers showed the strongest growth at 15.8 per cent, outstripping capacity expansion of 11.9 per cent.
Load factors here were the second-weakest among regions at 74
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