F-35 program cost rises $51 billion as modernization and readiness needs grow
The Pentagon’s F-35 Joint Strike Fighter program is now estimated to cost about $51 billion more than in December 2023—a roughly 10% increase. The reported drivers include software modernization, readiness improvements, spare-parts shortages and engine-power upgrades, underscoring the expanding sustainment burden of the U.S. stealth-fighter fleet.