A US Airways jet departs Washington's Reagan National Airport next to American Airlines jets in this file photo. US Airways Group and AMR Corp's American Airlines have offered concessions to European Union antitrust regulators to win approval for their planned US$11 billion merger to create the world's largest airline. The European Commission said yesterday it would take a decision by August 6. US regulators are also examining the deal, which marks the fourth major tie-up in the US airline industry in five years.