Singapore Airlines primarily operate a mixed fleet of Airbus and Boeing planes.
Airbus Planes include
Airbus A330-300 (Process of Phasing out)
Airbus A350-900/ULR (Going to be the backbone of the fleet, tgt with B787-10)
Airbus A380-800
Boeing Planes include
Boeing 777-200/ER (In process of retiring, all retired/stored at this point)
Boeing 777-300/ER (Regional and selected long haul routes, Notable route is SQ1/2, SG to San Francisco, flagship route)
Boeing 787-10 Dreamliner (Together with A350-900, forming fleet backbone)
For SIA Cargo
Boeing 747-400F (BCF) The Boeing Converted Freighter (BCF) planes are used to fly cargo.