JetBlue (JBLU) may sue Portugal, alleging repeated denials of Lisbon airport slots since 2023, limiting US carriers' access. The airline urged US regulators to reconsider "open skies" benefits unless reciprocity is ensured. JetBlue recently ended its TAP Air Portugal partnership. Despite YTD losses of 33.8%, shares rebounded 18.6% this month after a new UAL partnership.