A 2.5% rise in the number of business travellers using London Heathrow has given the airport its busiest ever August.
With 6.5m travellers passing through the UK hub, the month was also airport operator BAA's second busiest month on record.
But passenger numbers dropped elsewhere in the country, leaving BAA with a slight fall of 0.6% to 10.6m compared with the same month in 2009.
BAA said the main driver of traffic at Heathrow was European scheduled traffic which rose by 10.4% compared with last year.
The airport operator said there was also an 8.3% increase in capacity compared with 2009.
But at London Stansted a fall in capacity saw passenger figures slump by 6.1%.
It was the same story in Glasgow where an 8.4% drop in capacity was reflected in a 9.4% decrease in passenger numbers.
At its other three UK airports, BAA said Edinburgh enjoyed a 9.4% rise in European traffic despite a 0.2% overall fall in passenger number while Aberdeen and Southampton saw traffic fall 4% and 1% respectively.
www.baa.com