You need to be specific with this, which aircraft, which variant of the aircraft, right down to which engines are fitted, what load you are carrying etc etc etc
Any change to this data will change the service ceiling.
The service ceiling of an aircraft is the maximum altitude that the aircraft can safely maintain.
13,400 feet
The Boeing 747 has a service ceiling altitude of 43,100 ft (13,100 m)
35,000ft (A380-800, initial cruise altitude). The service ceiling (maximum altitude) of this aircraft is 43,000 ft.
The service ceiling for the Boeing 787 is 43,000 feet.
The service ceiling for an Airbus A380 is 43,000 ft (13,106 metres).
There are two types of maximum altitude. The first is set by the FAA and is known as Service Ceiling and the second is the maximum altitude, above sea level, at which an aircraft can maintain horizontal flight under standard atmospheric conditions. This is called Absolute Ceiling. Absolute ceiling is also affected by another factor: weight.
Budapest Aircraft Service was created in 1991.
The 'service ceiling ' is 43,097 feet.
The service ceiling of a P-51D was reported as 41,000 ft.
An absolute ceiling is the maximum altitude above sea level at which an aircraft or missile can maintain horizontal flight under normal conditions.
The Airbus A380 is the largest passenger aircraft.