NEW YORK (AP) - The massive storm off the East Coast threatens to bring air travel to a near halt for at least two days in a key region for both domestic and international flights.

Major carriers such as American Airlines, JetBlue and Delta plan to cancel all flights into and out of three area airports in New York, the nation's busiest airspace. Delays are rippling across the U.S. and the Atlantic, affecting travelers in cities such as San Francisco, Chicago and Paris.

The Port Authority of New York and New Jersey, which runs five airports in the area, says it expects all carriers to cease operations and it advised passengers to check with their carriers before heading to the airport.

Passengers were reporting multi-hour wait times at airline call centers.