Thousands of flights are being grounded today in the face of severe snow storms across the US east coast.
The flight disruption affecting US domestic and transatlantic services came as states of emergency were declared in New York and New Jersey with blizzard warnings for parts of Pennsylvania, New Jersey, New York and Connecticut.
A 24-hour blizzard warning was issued from midnight local time, with winds of up to 60mph.
More than 6,500 flights have been grounded, with airports in New York, Washington DC, Boston, Baltimore and Philadelphia worst hit, according to tracking service FlightAware.
British Airways cancelled all flights to and from New York JFK, Newark and Philadelphia and no services will run from Heathrow to Boston due to winter storm Stella.
A single Boston to London flight is due to operate together with some flights to and from Washington and Baltimore, although these will be subject to revisions in schedules, the airline warned.
Fourteen Virgin Atlantic flights have been cancelled today, including eight to and from JFK and other covering Newark, Boston and Washington.
BA said: “There are severe snow storms forecast across the east coast of the USA, and as a result flights to and from the region will be significantly affected on Tuesday.
“We will look to use larger aircraft on Wednesday, where we can, to help accommodate extra customers who are not able to travel on Tuesday.”
The airline is offering free booking changes to passengers due to fly from six major US east coast airports today and tomorrow to move back travel up until Friday. The policy also applies to partners carriers American Airlines, Iberia and Finnair flights on the routes.
Virgin Atlantic has also waived last-minute rebooking penalties for people due to fly on affected routes until Friday.