It already is.
The Airbus A319 entered service with Swiss Air in April 1996.
The service ceiling for an Airbus A380 is 43,000 ft (13,106 metres).
The projected cost of the A350, scheduled to enter service in 2013, is between $208.7m and $269.6m (US Dollars).
As of June 2013, US Airways use a mixture of Airbus types. The largest in service is the A330-300 which has 293 seats. They also have on order a number of A350-900, due to enter service in 2017, which will have a maximum seating capacity of 330.
Yes
Air France was the launch customer for the first Airbus aircraft (Airbus A300), introduced into service on 30 May 1974
Yes, Kenya Airways, the flag carrier of Kenya, operates Airbus aircraft in its fleet. Specifically, Kenya Airways has Airbus A320 and Airbus A330 aircraft in service for its domestic and international flights.
The Airbus A321 has a service ceiling altitude of 41,000 ft / 12,500 m
Airbus A380 made its first flight on April, 27; 2005. however, the aircraft entered the commercial service in the year 2007, Singapore airline was the first airline to operate an A380.
As of July 2011 52 are in service.
It first entered service with Pan Am in October 1958