American Airlines customers at select airports now can use mobile devices to receive and display electronic boarding passes for domestic flights

, replacing paper. The option is available to those departing Chicago O'Hare and next week will be expanded to John Wayne Orange County and Los Angeles International airports. "If successful in trial cities, it could be extended to additional U.S. airports in the coming months," according to AA. Continental Airlines also offers paperless boarding passes at 10 airports, including recently added New York LaGuardia.