Heathrow Airport Holdings (HAH) has closed its previously announced sale of Aberdeen, Glasgow and Southampton airports in the UK to a consortium of Macquarie and Ferrovial.
Ferrovial said in October that the value of the deal is approximately £1bn ($1.6bn), including debt.
Heathrow CEO John Holland-Kaye said: "Aberdeen, Glasgow and Southampton airports and their people have been part of our company for a long time.
"This sale enables us to focus on improving Heathrow for passengers and winning support for Heathrow expansion. Heathrow is the UK's only hub airport, connecting all of the UK to global growth and bringing economic benefits locally and nationally."
Aberdeen Airport is considered to be the world's busiest commercial heliport and transports more than 500,000 passengers for the North Sea oil and gas industry. The airport records close to three million passengers and 118,000 aircraft movements a year.
Glasgow Airport has more than seven million passengers travelling annually with 80,000 aircraft movements from 30 airlines.
Southampton Airport has 15 airlines operating from its hub to transport nearly two million passengers a year.
Previously called the British Airports Authority, HAH owned seven airports but sold Gatwick, Edinburgh, Stansted in the past to comply with UK Competition Commission's directive.
The current transaction will allow Heathrow to focus on Europe's busiest airport, where it is currently campaigning to build a new runway.
Image: Heathrow Airport Holdings has sold the three airports to focus on Heathrow where it is campaigning to build a new runway. Photo: courtesy of Heathrow Airport.