Stansted Airport in London has been sold to Manchester Airports Group for more than $US2 billion.
Heathrow Airport Holdings of Spain made the announcement in London on Friday.
The deal means that the company, formerly called BAA, will be responsible for four airports in future compared with seven previously.
AAP reports that Stansted is the fourth-busiest airport in Britain, after Heathrow, Gatwick and Manchester.
The sale is expected to be completed by the end of February.