F/A-XX is a development and acquisition program for a future sixth-generation strike fighter to replace the United States Navy's F/A-18E/F Super Hornet and complement the F-35C beginning in the 2030s. A requirement was first identified in June 2008.
The F/A-XX program is distinct from the U.S. Air Force's NGAD sixth-generation fighter program.
In July 2025, it was announced that the F/A-XX program received $76 million in funding for fiscal year 2026 while the Boeing F-47 received $3.4 billion in funding.