The U.S. Air Force has delayed retirement of its B-1 Lancer and B-2 Spirit bombers, planning to operate B-1s through 2037 and retain B-2s even longer. This adjustment addresses the extended transition to the B-21 Raider stealth bomber, ensuring sustained long-range strike capacity.
The decision maintains fleet readiness as B-21 production ramps up. Low-rate initial production began after a 2024 contract, with aircraft deliveries starting on schedule in 2025 and the first operational unit slated for Ellsworth Air Force Base, South Dakota, in 2027.
A $4.5 billion agreement with Northrop Grumman, funded by fiscal 2025 reconciliation legislation, boosts annual B-21 production capacity by 25 percent. This compresses delivery timelines while controlling costs, with final assembly at Palmdale, California.
B-1s, numbering fewer than 60 operational from an original 100, face high maintenance demands from structural fatigue and complex swing-wing systems, yielding mission-ready rates below 50 percent. B-2s, recently modernized with $7 billion investment, provide critical stealth penetration, as seen in recent Iranian operations.
Originally, B-21 service was targeted for the mid-2020s, but timelines slipped to 2027. The legacy bombers bridge this gap, preserving nuclear and conventional strike options against near-peer threats until B-21 forms the fleet backbone.