Boeing wins $2.8 billion Air Force contract to upgrade South Korea’s F-15K jets in St. Louis
Contract centers on integrated system upgrades for South Korea’s F-15K fleet
Boeing has been awarded a not-to-exceed $2,805,961,005 U.S. Air Force contract to develop and integrate upgrades for South Korea’s F-15K fighter aircraft, with the bulk of work slated for St. Louis. The contract, dated Jan. 30, 2026, calls for the design and development of an integrated suite of aircraft systems to support modifications to the Republic of Korea Air Force’s F-15K fleet.
The award is structured as a hybrid contract combining cost-plus-fixed-fee and fixed-price incentive elements, and it is described as an undefinitized contract action. Performance is scheduled to run through Dec. 31, 2037.
Foreign Military Sales framework and initial funding
The contract is being executed under the U.S. Foreign Military Sales framework for the Republic of Korea, with the Air Force Life Cycle Management Center at Wright-Patterson Air Force Base, Ohio, serving as the contracting activity. At the time of award, $540 million in Foreign Military Sales funds were obligated.
The procurement was listed as a sole-source acquisition. The contract identifier provided in the award notice is FA8634-26-C-B002.
Why the work matters to St. Louis and the F-15 production base
St. Louis is Boeing’s primary hub for F-15-related work, including new-build production and sustainment and modernization activity. A long-duration upgrade program of this scale typically supports engineering, integration, and testing roles alongside manufacturing and modification work, with timelines that can extend as aircraft are inducted and returned to service over multiple years.
The award also underscores a broader trend in fighter fleets globally: extending operational life and capability through avionics and mission-system modernization rather than pursuing immediate replacement, particularly when airframes have remaining structural life and the platform has established logistics and training pipelines.
Key verified terms of the award
- Total ceiling value: Not-to-exceed $2,805,961,005
- Customer: Republic of Korea (Foreign Military Sales case)
- Scope: Design and development of an integrated suite of aircraft systems supporting F-15K modifications
- Place of performance: St. Louis, Missouri
- Completion date: Dec. 31, 2037
- Initial funds obligated: $540,000,000 at award
- Contracting activity: Air Force Life Cycle Management Center, Wright-Patterson AFB, Ohio
The award calls for an “integrated suite of aircraft systems” supporting modification of South Korea’s F-15K aircraft and lists St. Louis as the location for contract performance.
What remains unclear
The public award notice does not itemize which specific subsystems will be replaced or added, nor does it provide the number of aircraft to be modified, the modernization configuration baseline, or the planned schedule for aircraft induction and delivery. Those details are commonly contained in program documentation and contract deliverables that may not be fully public.
Even with limited publicly released technical specifics, the contract’s value, duration, and St. Louis performance location indicate a major, long-term modernization effort tied to Boeing’s fighter work in the region.