JetBlue says it will begin flying out of Terminal B at LaGuardia Airport

JetBlue Airways Corp. said it's changing its presence at New York's LaGuardia Airport by adding flights in a new terminal and flying to additional destinations. The New York City-based carrier (Nasdaq: JBLU) said beginning Sunday, it will start operating out of LaGuadia's Terminal B, as well as continuing to operate out of the airport's Marine Air Terminal (Terminal A). The new usage of Terminal B comes out of the airline's arrangement with American Airlines, called the Northeast Alliance, with…