Thanksgiving travel rush begins with snowy weather threatening the US Northeast

The late crush of holiday travellers is picking up steam, with about 2.7 million people expected to board flights on Wednesday and millions more planning to drive to Thanksgiving celebrations.

Airline officials say they are confident they can avoid the kind of massive disruptions that have marred past holiday seasons, such as the meltdown at Southwest Airlines over last Christmas.

But heavy rain and snow showers along the East Coast could cause delays. The National Weather Service was predicting accumulating snow in northern New England Wednesday, including up to 8 inches (20.3 centimetres) of snowfall in northern Maine. Snow was also expected to hit the northern Rocky Mountains on Thanksgiving Day, bringing up to 1 foot of snow to parts of Wyoming by Friday.

Still, as of Wednesday morning, US airports were reporting only nine flight cancellations and 260 flight delays, according to FlightAware. Airlines have added tens of thousands of employees in the last couple years, and Southwest says it has bought more winter equipment to keep planes moving even during sub-freezing temperatures.

Security lines at airports could be long because of the crowds. Delta Air Lines is telling passengers to arrive at the airport at least two hours before their flight if they are travelling within the United States, three hours early if they're flying overseas — and maybe earlier on Sunday and Monday.

The Transportation Security Administration expects to screen 2.7 million passengers Wednesday. On Sunday, it expects to screen 2.9 million, which would surpass a previous record set on June 30.

The holiday will also test the Federal Aviation Administration, which faces shortages of air traffic controllers at key facilities that caused reductions in flights to the New York City area this summer and fall.

US Transportation Secretary Pete Buttigieg said during a news conference Monday that the government has prepared for holiday travel by hiring more air traffic controllers, opening new air routes along the East Coast and providing grants to airports for snowploughs and de-icing equipment.

Meanwhile, AAA predicts that 55.4 million people will travel at least 50 miles from home between Wednesday and Sunday, the third-highest forecast ever by the auto club. AAA says most of them, 49.1 million, will drive.

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