Heathrow Airport has cancelled 30% of its flights for Sunday following a weather warning from the Met Office.
Heavy snowfall is expected in the southeast of England overnight and Heathrow said a reduced flight schedule had been agreed to minimise disruption to passengers.
A revised scheduled showing which flights will operate will be published on www.heathrow.com at 18:00hrs today.
A further revised schedule with additional cancellations may be made on a rolling basis, it said. Latest forecasts show snow is expected to start falling at Heathrow from 17:00hrs on Saturday until 06:00 tomorrow, with heavy snowfall between 21:00hrs and 03:00hrs.
As much as 15cms of snow may cover the southeast and visibility on Sunday is likely to be reduced with freezing fog from 18:00hrs.
Heathrow chief operating office Normand Boivin, said: "This decision ensures that the greatest number of passengers can fly with the minimum amount of disruption. It also means that those passengers whose flights are cancelled will know in advance, and can make alternative arrangements or rebook in relative comfort."
British Airways said it will publish details of flight cancellations later today, meanwhile Virgin Atlantic is offering all passengers due to fly tomorrow the option to rebook to travel on Monday, Tuesday or Wednesday next week.
Gatwick Airport is also warning of possible disruption to flights on Sunday and promised to update passengers on its website and via Twitter.
By Linsey McNeill
