F-35 engine contract delays push production into spring 2026

Recently, two additional lots covering 300 airframes and valued at $24 billion were finalized. The Joint Program Office stated to Air & Space Forces Magazine: “we plan to definitize Lot 18 and award the Lot 19 contract for engines in spring 2026.”

Despite criticism over budget overruns and performance concerns, proponents highlight that the F-35’s advanced technology and widespread use among allies provide significant strategic advantages. A joint-service airframe simplifies logistics across different branches of the military and among partner nations.

While other modern fighters like Russia’s Su-57 Felon and China’s J-20 Mighty Dragon have entered service in smaller numbers, there are now nearly 1,300 F-35s operating worldwide.

The role of the F-35 remains central to US and allied defense strategies against potential adversaries such as Russia and China. Although some analysts question its raw performance compared to competitors, supporters argue that its integration within a global alliance offsets these concerns.

The F-35 continues to be seen as an important deterrent against regional threats and a key element in maintaining air superiority.