BAA has reported a fall in passenger traffic at most of its airports in January 2010 due to poor weather conditions and snow.
London Heathrow Airport experienced drop of 0.5% in passenger traffic compared with January 2009.
The airport expected year-on-year passenger traffic growth of 2.5% for January, but bad weather caused the loss of nearly 145,000 passengers.
BAA handled 7.2 million passengers in January, indicating a drop of 3.1% compared with the same month last year.
There was also a 5.6% drop at Stansted, a 9.7% drop at Southampton, a 12.2% drop at Glasgow, a 7.4% drop at Edinburgh and a 13.6% drop at Aberdeen Airport, the latter due to heavy snow.
North Atlantic traffic fell by 3.8% year on year, and scheduled European traffic dropped by 0.3% during the same period.