Dubai International Airport is expected to see 40.5 million passengers passing through by the end of this year at an increase of 8 per cent over 2008, according to Sheikh Ahmed Bin Saeed Al Maktoum, president of Dubai Department of Civil Aviation and chairman of Dubai Airports and Emirates Group, Emirates news agency (WAM) said citing Gulf News’ report Tuesday. The announcement was made at The Middle East Duty Free Association’s conference that took place Tuesday here. Meanwhile, Dubai Duty Free retail sales will increase by 4 per cent by the end of 2009 to touch Dh4 billion, Colm Mcloughlin, managing director forecasted.