A repeat stowaway offender was caught aboard a flight from Newark to Milan on Wednesday, sources familiar with the matter said, more than a year after she pulled a similar stunt on a New York-to-Paris jet. Svetlana Dali was taken into custody in Italy after allegedly sneaking onto United Flight 19 at Newark Liberty International Airport in New Jersey, which departed at about 5:30 p.m. ET on Wednesday. Dali made it past ticketing agents, and when the United in-flight crew realized she was aboard without a ticket, the Boeing 777-200 was already over the Atlantic Ocean, according to sources. In May, a federal jury in Brooklyn convicted Dali, a Russian citizen with U.S. residency, on a stowaway charge stemming from her unauthorized Delta Air Lines journey from New York to Paris on Nov. 26, 2024. She was sentenced to time served for that unauthorized French journey.…