Employees: 113,300. American Airlines Group is the result of a 2013 merger between US Airways and American Airlines, which had filed for Chapter 11 bankrupts protection a year earlier. Today, the group is the largest airline in the world, operating 6,700 flights and transporting 530,794 passengers daily. Its fleet of 1,494 planes is also the largest globally, and according to chairman and chief executive Doug Parker, the company posted the best year ever in 2014 with a net income of $4.184 billion.