Luton Airport looks set to be sold for around £400m.
The airport handled 9.6 million passengers last year and will be, subject to regulatory approval, Aena's fifth largest airport.
Aena executive chairman Jose Manuel Vargas said: "We aim to substantially build up Luton in consultation with all its stakeholders."
More top news
The Denne family from Milton Keynes say they want to show people what the world of farming is really like.
Some late spells of sunshine. Then, dry overnight with clear spells.
A 38-year-old man has been arrested after a man's body was found in Mach, Cambridgeshire on April 18.