American Airlines Says It Will Appeal a Ruling That Would Break up a Partnership With JetBlue

American Airlines planes sit stored at Pittsburgh International Airport in Imperial, Pa., on March 31, 2020. Gene J. Puskar/AP Photo

DALLAS—American Airlines said Wednesday it will appeal a court decision that would force the airline to break up its partnership with JetBlue Airways in the Northeast.

American and JetBlue face a late-June deadline to end the agreement in which they coordinate flights and share revenue. The Justice Department sued to block the alliance, and a federal judge ruled last week that the partnership violates antitrust law.