The 1st U.S. Circuit Court of Appeals affirmed a trial judge's ruling blocking the airlines' "Northeast Alliance."

American Airlines lost its appeal to revive an alliance with JetBlue that collapsed after lawsuits succeeded in declaring it anticompetitive, a judge ruled

Nov 8 (Reuters) - A U.S. appeals court on Friday held that a trial judge correctly found that American Airlines' (AAL.O), opens new tab now-scrapped U.S. Northeast partnership with JetBlue Airways (JBLU.O), opens new tab violated federal antitrust law.

An effort by the two carriers to work together to compete with Delta and United in the Northeast has been left stalled on the tarmac.