Hundreds of passengers slept in airports in Europe.
Thousands of flights and train services have been cancelled across Europe because of snow and ice, leaving many travellers stranded. The schedules at Schiphol Airport near Amsterdam, Heathrow Airport and airports throughout the UK were littered with cancellations and delays. Few flights were leaving London Heathrow, Europe's busiest airport, and one third of flights were cancelled in major hubs like Paris and Frankfurt.
Departures from Brussels airport were to be cancelled until Wednesday.
The UK, France and Germany were among the worst-hit areas, with forecasters warning of freezing weather all week.
Lines of delayed passengers snaked for several hundred metres outside London's St Pancras station, and Eurostar urged travellers to cancel their trips if possible.
There were severe delays on the Eurostar rail service between the UK and France and Belgium. Thalys trains between Belgium and France were also affected as speed restrictions hit rail travel in England and northern France.