JetBlue Airways Corp. JBLU, +3.23% Chief Executive Robin Hayes will step down in February after nearly nine years at the helm, citing the advice of a doctor, the company said Monday. The resignation comes as a federal judge decides whether to block the airline’s merger with Spirit Airlines Inc. SAVE, +2.33% that Hayes championed. JetBlue President Joanna Geraghty will succeed Hayes to become the only woman in charge of a major U.S. airline. Hayes, who led JetBlue through the pandemic, spearheaded the launch ...