JetBlue Airways and United Airlines have been negotiating a partnership, three industry sources familiar with the matter told Reuters.The New York-based airline has been seeking partnerships after a federal judge blocked its so-called Northeast Alliance with American Airlines in 2023.The partnership with United is envisioned as quite different from the NEA, the sources said. While the alliance is expected to focus on providing greater connectivity to customers and allowing them to earn and burn frequent-fli ...