The plane was then towed to a gate with passengers on board, she said.
Houlton, a 27-year-old teacher in Mexico, said he managed to sleep through the slide and didn't learn until later that the plane had skidded off course.
"I was sleeping. I woke up and it was 9:30," Houlton said. "A police officer came on to make sure everyone was OK. Luckily, everyone was OK. It was kind of wild. I still can't believe it."
The Port Authority of New York and New Jersey, which operates the airport, said operations for domestic and international flights were suspended for about two hours because of slick runways, leaving passengers at crowded gates. Flights resumed after 10 a.m. on two of the airport's four runways, but residual delays for passengers were expected to linger.
The landing came two days after a major snowstorm dumped a half foot of snow in New York City, forcing the cancellation of hundreds of flights and stranding passengers both in the city and throughout the world who were heading to New York. Passengers from canceled flights continued to fill the few remaining seats on many planes already crowded by holiday travelers.
The Delta Connection flight by Endeavor Air originated in Toronto. Endeavor Air was formerly Pinnacle Airlines.
The flight also came a day after a small plane traveling to Connecticut after a tour of the Statue of Liberty made an emergency landing on the Major Deegan Expressway in the Bronx. Neither the pilot nor his two passengers were seriously injured.