A new Heathrow terminal is expected to open in 2014
UK air passenger numbers have seen their first monthly increase since March 2008, according to BAA.
The figures show that a total of 9.9 million people used BAA airports in November, which is 0.8% higher than in the same month last year.
However, passenger numbers at both Glasgow and Aberdeen airports were down over 4% on the year.
BAA also operates London Heathrow, Stansted, Aberdeen, Edinburgh and Southampton airports.
Gatwick marked its last full month under BAA ownership with a 4.5% increase to 2.1 million people.
It has been bought by US-based Global Infrastructure Partners, which owns London City Airport, for just over £1.5bn.
Traffic at Heathrow airport increased by 1.1% to 5 million people in November.
In a statement BAA said the figures show that consumer confidence in air travel is growing.
"Global market conditions remain challenging, but these figures are encouraging," said BAA chief executive Colin Matthews.