The International Air Transport Association (IATA) said there were continuous signs of improvement in international scheduled air traffic in March, followed by a slight drop in April due to the volcanic ash crisis.
Passenger demand rose 10.3% while cargo demand grew 28.1% – an increase of 9.0% and 26.3% respectively on February's figures.
Traffic rose 12.6% for Asia-Pacific carriers, 6.0% for European carriers, 7.8% for North American carriers, 25.9% for Middle Eastern carriers, 13.6% for African carriers and 4.6% for Latin American carriers.
International air cargo traffic is now within 1% of recovering to its previous high point of early 2008.
North American carriers experienced a rebound in international freight by 32.2%, despite the sluggish US economy.
European carriers recorded the weakest improvement in freight demand at 11.7%, mainly due to the slow economic recovery in the region.