<Tr> <Th> Website </Th> <Td> www.aa.com </Td> </Tr> <Tr> <Td_colspan="2"> Footnotes / references * Hubs in Charlotte, Chicago, Dallas, Los Angeles, Miami, New York, Philadelphia, Phoenix, and Washington </Td> </Tr> <P> American Airlines Group, Inc. is an American publicly traded airline holding company headquartered in Fort Worth, Texas . It was formed December 9, 2013, in the merger of AMR Corporation, the parent company of American Airlines, and US Airways Group, the parent company of US Airways . The airline groups together form the largest airline in the world, with more than 6,700 daily flights to 350 locations in 56 countries worldwide, about $40 billion in operating revenue, over 100,000 employees, and plans to take delivery of 607 new aircraft, including 517 narrowbody aircraft and 90 widebody international aircraft . The integration of American Airlines and US Airways was completed when the Federal Aviation Administration granted a single operating certificate for both carriers on April 8, 2015 . </P> <P> In January 2012, US Airways Group, the parent company of US Airways, expressed interest in taking over AMR Corporation, the parent company of American Airlines . In March, AMR's CEO Tom Horton said that the company was open to a merger . US Airways (US) told some American Airlines (AA) creditors that merging the two carriers could yield more than $1.5 billion a year in added revenue and cost savings . On April 20, American Airlines' three unions said they supported a proposed merger between the two airlines . With AMR under Chapter 11 bankruptcy protection, American Airlines had been looking to merge with another airline . Earlier in July, a bankruptcy court filing stated that US Airways was an American Airlines creditor and "prospective merger partner"; on August 31, US Airways CEO Doug Parker announced that American Airlines and US Airways had signed a nondisclosure agreement, in which they would discuss the possibility of a merger . </P>

When did us airways and american airlines merger