The newly merged US Airways will buy 20 A350-800s, becoming the first airline to do so, and deliveries will start in 2011 and go until 2014. The plane is capable of seating 253 in a standard three-class seat layout.
According to Airbus, the airline's A330 pilots won't need to undergo additional training to fly the new airplane. The deal is worth €3.42 billion, or $4.03 billion, at list prices. Keep in mind that Airbus will most likely cut a deal with the airline so that it pays significantly less for the aircraft.