U.S. Airways is sending flights back after two and a half hours, unless takeoff is imminent. It says it'll also offer beverages and snacks after 90 minutes and announce updates every 15 minutes.
The downside is the airline says it expects more cancellations. Crews who return to the gate run up against federal rules limiting how long they can fly.
Passenger-rights advocates have said airlines could avoid most delays if they scheduled fewer flights at congested airports.
