The seating capacity for an Airbus 330-300 is dependent upon the number of classes in the cabin layout and whether the plane is used for domestic or international flights. Typically, a three-class A330-300 has seating for 277 passengers, and a two-class arrangement has seating for 300 passengers.
Airbus A330-300 planes that are used for international routes typically seat more passengers than domestic planes. A common seating arrangement for international A330-300s is composed of 293 total seats, with 227 in economy and the rest split between business and first class.
The Airbus 300 could also refer to the Airbus A300, a twin-engine airliner that was released in 1972 and discontinued in 2007. The A300 had a seating capacity of 266 passengers in a typical three-class arrangement.