US airlines keep expanding their paperless boarding pass programs. At many airports you may now use ACTPrinter to present your boarding pass both at TSA checkpoints and at the gate.
American Airlines recently announced the expansion of mobile boarding passes to a total of 27 airports.
United Airlines currently supports mobile boarding passes at 13 airports. 5 more airports are expected to be added soon.
When it comes to mobile boarding passes, Continental is still the leader. The mobile boarding pass option is currently available for departures from 48 cities.
Where mobile boarding passes are not yet supported, you may still use ACTPrinter to bring along your electronic ticket for check-in.