Dozens of London flights to and from the US have been cancelled after Storm Stella caused travel chaos in the north east of America.
The US' National Weather Service issued blizzard warnings for parts of Pennsylvania, New York, New Jersey, Connecticut, Rhode Island, Massachusetts, Maine, Vermont and New Hampshire.
According to live flight tracker FlightAware, 6,022 flights have been cancelled, with many flights to and from London impacted.
British Airways said flights are "significantly affected", with routes to New York JFK, Newark and Philadelphia all experiencing cancellations.
There will be no flights from London Heathrow to Boston, and while some flights to and from Washington and Baltimore will go ahead, schedules may be changed.
Forecast heavy snow today will affect flights to/from East coast USA. Please check your flight status here https://t.co/Md01pAPZDw— British Airways (@British_Airways) March 14, 2017
If you no longer wish to travel on Tuesday 14 or Wednesday 15 March, even if your flight is still due to operate to/from these six major East Coast airports, you are able to change your booking free of charge and move it back to a date up to and including Friday 17 March. This policy also applies to American Airlines, Iberia and Finnair flights on these routes.
We are sorry for the disruption to your travel plans and are doing all we can to minimise the effect the weather forecast will have on our US operations.
It said the safety of its customers and colleagues will always be the airline's top priority, and it will look to use larger aircraft on Wednesday to help accommodate extra customers who couldn't travel today.
It has cancelled 14 Heathrow flights to and from New York JFK, Boston and Washington.
The airline said: "Customers booked to travel to, from and through Boston, Washington, New York – JFK and Newark on 15 - 17 March 2017, who prefer to rebook may do so without penalty."
Rebooking is subject to availability in the same cabin for flights and travel has to be completed by 24 March.
Elsewhere, American Airlines said some passengers can change their trip for free because of the severe weather, while Air Canada has cancelled flights, including some from Heathrow, saying change fees have been waived, and Aer Lingus has cancelled 12 flights to and from the US.
Travel Alert – March 15: YYG, YFC, YGP, YHZ, YGR, YQM, YSJ, YQY & ZBF. Change fees waived: https://t.co/JDgEGu99rl.— Air Canada (@AirCanada) March 13, 2017