Global airline capacity for December 2009 shows positive growth compared to December 2008, reports OAG, the world's leading aviation data business with its monthly report on trends in the supply of airline flights and seats. There are 294.8 million seats available this month, a rise of 4% over December 2008 levels. Global frequencies are up 1% compared to December 2008, with a total of 2.4 million flights scheduled for December 2009, despite an average North American frequency decline of 2%. Worldwide, frequencies and capacity in the low cost sector are both up by 10% compared to a year ago, accounting for 444,539 flights (18%) and 65.6 million seats (22%).