A small jet slid off a runway after landing at Kennedy Airport Sunday, causing no injuries but prompting officials to halt all traffic temporarily and divert some flights to Connecticut, the Port Authority said.

The Federal Aviation Administration was investigating the incident involving Delta Connection Flight 4100, which originated in Toronto and was operated by Endeavor Air. After touching down at Kennedy about 8 a.m., the CRJ2 jet went off the runway en route to a taxiway, the FAA and the Port Authority reported.

None of the 35 aboard, including passengers and crew members, was injured, according to the Port Authority.

Early yesterday, a freezing rain advisory, warning of icing conditions, was in effect for New York City, including Kennedy Airport.

Delta spokeswoman Kristin Baur said in a statement that the plane had slipped onto a grassy area and that the aircraft was towed to the gate, where the passengers were let off. Port Authority police and emergency crews responded to assist the passengers, and crews salted and sanded runways, officials said.

During the shutdown, eight flights bound for Kennedy Airport were diverted to Bradley International Airport, near Hartford, Conn. Kennedy was reopened shortly before 10:30 a.m. Sunday, and flight delays were less than 15 minutes, according to the FAA website.

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LaGuardia Airport and Newark Liberty reported average delays for arriving flights of nearly two hours yesterday afternoon, while Long Island MacArthur airport reported delays of less than 15 minutes.

The already sizable crowds of waiting passengers swelled at Kennedy Airport.

"It could've been worse," said Art Padille, 37, of Los Angeles, who had spent a week visiting New York City with his family and was planning to spend Sunday night at the airport until their flight took off Monday morning. They had planned to fly home Friday, but that flight was canceled.

Nick Bitsimis, 53, of Farmingdale, waited for his San Francisco-bound flight at Terminal 7 Sunday morning.

"You live on the East Coast and you learn to live with these things," Bitsimis said.

With Nicholas Spangler

and David Krantz