American, which sought court protection in November, asked a New York bankruptcy court to extend its so-called exclusivity period by three months to December 27.
The airline had no immediate comment on its request.
Some pressure on the company was relieved this week when it reached a tentative contract agreement with pilots aimed at cutting costs, and prospects brightened that other unions may also soon reach new collective bargaining deals.
American's unions want the airline to merge with US Airways
American has said it would weigh all options, including consolidation.
(Reporting by John Crawley; additional reporting by Kartick Jagtap in Bangalore; Editing by Leslie Gevirtz)