United Airlines said on Wednesday it plans to fly its Boeing 737 MAX aircraft in the first quarter of 2021 after the planemaker won U.S. Federal Aviation Administration's approval for ungrounding the aircraft.

(Reporting by Rachit Vats in Bengaluru; Editing by Shinjini Ganguli) ((Rachit.Vats@tr.com; Reuters Messaging: rachit.vats.thomsonreuters.com@reuters.net))