JetBlue's winter route additions include a major expansion in flights to the Caribbean, including flights from Raleigh, N.C., to Jamaica, Puerto Rico and Cancun, Mexico. Most of the Caribbean flights will originate in Newark, N.J., including service to Aruba, Cancun, Jamaica, St. Maarten, Providenciales in the Turks and Caicos, Punta Cana in the Dominican Republic and Nassau, Bahamas.