USAF Next-generation Fighter jet could cost three times that of the F-35

United States is currently working on two Sixth generation Fighter jets program

•  Boeing F/A-XX Program: F/A-XX is a development and acquisition program for a future sixth-generation air superiority fighter to replace the United States Navy’s F/A-18E/F Super Hornet beginning in the late-2020s. This USN program has also been referred to at different times as NGAD, or the: Next Generation Air Dominance program.
• F-X Program:  F-X, also known as Penetrating Counter Air or Next-Generation Air Dominance. The Air Force hasn’t chosen a manufacturer or design for its F-X sixth-generation fighter. However, US Air Force Research Laboratory recently released a video shows a conceptual design of an F-X sixth-generation fighter jet and other futuristic technology. The AFRL video shows a sleek, stealthy design with a laser powerful enough to destroy an enemy fighter.