Snowy weather resulted in passenger numbers dipping nearly 11% at Gatwick airport last month.
A total of 1.89 million passengers were handled at the West Sussex airport - a 10.7% reduction on the December 2009 figure.
The biggest dip last month was on flights to and from Ireland, where numbers fell 23.7%.
Gatwick said that putting aside the impacts of the weather, the underlying trend showed passenger growth last month "in the region of 2.6%".
Overall, Gatwick handled just under 31.35 million passengers in 2010 - a 3.2% fall on the figure for 2009.