Airlines pile on to buyback bandwagon By: MarketWatch July 24, 2014 at 14:29 PM EDT American Airlines and United Continental announced new $1 billion stock buyback programs, adding to a big jump in corporate repurchase activity in July. Read More >> Related Stocks: 3M Co Alaska Air Group American Airlines Gp Caterpillar Delta Air Lines Intel Corp Jetblue Airways Corp Macy's Southwest Airlines