Middle Eastern carrier Emirates is offering five long-haul aircraft for sale through a public tender.
The airline is putting two Airbus A340-500s and two A330-200s on the market.
These are being sold alongside a single Boeing 777-200. All five aircraft are fitted with Rolls-Royce Trent engines.
Emirates says, in its public announcement, that the A340s are "available now" while the A330s and 777 will become available from February and May 2014 respectively.
It is inviting expressions of interest by 9 August. Emirates says it is selling the aircraft "as part of its regular upgrading exercise".