Last month's heavy snowfall meant that UK airports operator BAA handled almost 11% fewer passengers at its six UK airports than in December 2009. The company said the cost of the weather disruption was approximately £24m.
A total of 7.2 million passengers passed through the six airports in December 2010 - a 10.9% drop on the December 2009 figure.
BAA handled 4.8 million passengers at Heathrow last month - a 9.5% reduction on December 2009.
The biggest dip last month was at Southampton airport where there were 22% fewer passengers. Edinburgh was down 18.4%, Glasgow fell 15.3%, Stansted was down 10.9% and Aberdeen fell 8.3%.
BAA, majority owned by Spain's Ferrovial, has been widely criticised over its response to the bad weather, and Virgin Atlantic said on Monday it would withhold landing and parking fees it pays to BAA until it explains why a day's snowfall left thousands of air passengers stranded.
The results of an internal BAA inquiry into the disruption headed by non-executive director David Begg are due to be published in March.
British Airways said last month it expected to take a £50m hit from the disruption.
