US: More than 2,000 flights cancelled due to freezing temperatures, heavy snow

Ahead of Christmas holidays, more than 2,270 US flights were cancelled on Thursday (local time) due to heavy snow and freezing temperatures, reported CNN.

Snow, rain, ice, wind and frigid temperatures are disrupting air travel plans across the United States and bus and Amtrak passenger train service.

Airlines cancelled just over 2,270 US flights by 6pm ET on Thursday, and proactively cancelled almost 1,000 flights for Friday as well, according to the flight tracking site FlightAware.

Eighty-five flights were already cancelled for Saturday. Delays were even more extensive on Thursday: More than 7,400 as of 6pm, reported CNN.

The impacts are being felt hardest in Chicago and Denver, where around a quarter of arrivals and departures — hundreds of flights at each airport — were cancelled on Thursday, FlightAware data shows.

At one point on Thursday, at Chicago's O'Hare International Airport, delays averaging 159 minutes — almost three hours — were being caused by snow and ice, according to a notice from the Federal Aviation Administration (FAA).

Temperatures at the O'Hare dropped to -13°C at around 5pm local time. The National Weather Service reported snow and freezing fog.

The FAA said that departing aircraft at Dallas Love, Dallas-Fort Worth, Denver and Minneapolis airports require spraying of de-icing fluid for safe travel, reported CNN.

Meanwhile, many airlines have issued weather waivers allowing travellers to change their itineraries without penalty during a short window.

For those whose flights are still scheduled to depart, the Transportation Security Administration is recommending that passengers arrive at the airport earlier than usual, as per the CNN report.

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