F110
FieldedEngine
Two F110-GE-129 engines powered the first F-15EX. A competing F100 proposal is not an installed-component claim.
Link Confirmed
Aircraft · Air
F-15EX Eagle II
Modernized F-15 fighter with digital flight controls and upgraded avionics.
by Boeing · Unveiled Mar 12, 2019
Limited fieldingAircraftAirMilestoneJul 12, 2025
boeing.com/defense/fighters-and-bombers/f-15ex-eagle- Milestones8
- Sources16
- Operators—
- Components1
Milestones20192025
Timeline8
- UnveiledReported
F-15EX named in Air Force FY2020 budget request
The F-15EX designation first appeared publicly in the Air Force's FY2020 budget request, briefed to reporters on March 12, 2019, which sought eight F-15EX aircraft. Earlier coverage used the informal, unconfirmed label F-15X for Boeing's pitch.
SourcesDefense NewsMilitary.com
- Contract awardConfirmed
Air Force awards first F-15EX production lot
The nearly $1.2 billion Boeing contract covered the first eight F-15EX aircraft and associated development and support work.
SourcesU.S. Air Force
- MilestoneConfirmed
F-15EX fires its first live missile
A 40th Flight Test Squadron F-15EX fired an AIM-120D during Combat Archer. This was a weapons trial, not combat use or the first ground test of the aircraft.
SourcesU.S. Air Force
- MilestoneConfirmed
First F-15EX reaches an operational unit in Oregon
The 142nd Wing received its first F-15EX at Portland Air National Guard Base. Earlier aircraft had been delivered for testing; this milestone does not assert a separate IOC declaration.
SourcesU.S. Air Force
- MilestoneConfirmed
GAO assessment: F-15EX production and delivery risks
GAO’s June 2025 assessment reports full-rate production in June 2024 and initial operational capability in July 2024. The September 2024 cost estimate covered 98 aircraft (96 procurement and two development). GAO identified production-rate, parts-supply and cybersecurity risks. These are historical findings, not a current fleet count.
- MilestoneConfirmed
F-15EX test aircraft deploy to Kadena for training
Two 85th Test and Evaluation Squadron aircraft arrived for integration and familiarization training. This temporary visit is distinct from permanent basing plans.
SourcesU.S. Air Force
Solid entries are confirmed, outlined reported, dashed estimated or still to come; dotted italic entries are speculative. Dates show only the precision the sources give.
Built with1
Cost to the government
- Total acquisition costEstimated$12.29BEstimate / observation: 2024-09 · BY2025 $ · 98 units
GAO-25-107569 printed p. 72 (PDF p. 82); estimate dated 2024-09, expressed in constant FY2025 dollars. Visually transcribed from the program performance graphic, whose amounts are in millions. Historical estimate, not a current price or contract award. Total covers development and procurement quantities.
- Unit cost (PAUC)Estimated$125MEstimate / observation: 2024-09 · BY2025 $
GAO-25-107569 printed p. 72 (PDF p. 82); estimate dated 2024-09, expressed in constant FY2025 dollars. Visually transcribed from the program performance graphic, whose amounts are in millions. Historical estimate, not a current price or contract award. Program acquisition unit cost (PAUC); GAO methodology p. 197 divides program cost by total quantities. Report-rounded value, not flyaway or procurement unit price.
- Unit cost (flyaway)Reported$90.0MEstimate / observation: 2023-09-28 · Then-year $ · 12 units
Air Force spokesperson via Breaking Defense: flyaway price in the Lots 2-4 contract finalized Sept. 28, 2023 is approximately $90M per aircraft for Lot 2 (12 jets), rising to $97M for Lot 3 (12 jets) and $94M for Lot 4 (24 jets); cumulative value of the three lots $3.9B for 48 aircraft. Flyaway includes airframe, EPAWSS, engines, radars and other subsystems plus production NRE, SE/PM and ECOs; then-year dollars. Lots 3/4 prices kept in notes only (same natural key).
- Unit cost (APUC)Reported$94.0MEstimate / observation: 2022-12 · Then-year $ · 104 units
Average procurement unit cost from the F-15EX annual Selected Acquisition Report (based largely on CY2022 data, updated for the FY2024 plan of 104 aircraft), as reported by Air & Space Forces Magazine; includes EPAWSS; then-year dollars. Previous APUC with the smaller buy was $114.2M.
- Contract unit priceReported$108MEstimate / observation: 2026-09-29 · Then-year $ · 22 units
Lot 7 contract awarded Sept. 29, 2026: $2.38B for 22 F-15EX; average $108M per aircraft as computed by Air & Space Forces Magazine. Excludes GE F110 engines (bought separately as GFE). Funded from FY2026 budget and 2025 reconciliation.
Earlier cost observations (3)
- F-15EX Eagle II · Total acquisition cost · $12.47BEstimate / observation: 2022-12 · Then-year $ · 104 units
Then-year program acquisition cost (development, procurement, MILCON) from the same SAR (104-aircraft program), as reported by Air & Space Forces Magazine.
Air & Space Forces Magazine - F-15EX Eagle II · Unit cost (flyaway) · $80.5MEstimate / observation: 2022-11 · Then-year $ · 6 units
Lot 1 definitized November 2022: flyaway price $80.5M per jet for six jets (two test aircraft bought earlier). Then-year dollars per Air Force practice.
Breaking Defense - F-15EX Eagle II · Unit cost (flyaway) · $87.7MEstimate / observation: 2020-07
Per-unit flyaway cost in the July 2020 initial F-15EX contract as reported by Air Force Magazine, including engines; cited by Forbes. Boeing had claimed Block 1 flyaway under $80M.
Forbes
| Fiscal year | Appropriation | Request | Enacted | Qty | Budget line | Source |
|---|---|---|---|---|---|---|
| FY2027 | RDT&E | $133M | — | — | — | Office of the Under Secretary of War (Comptroller)Confirmed |
| FY2027 | Procurement | $2.96B | — | 24 | — | Office of the Under Secretary of War (Comptroller)Confirmed |
| FY2027 | Total | $3.10B | — | 24 | — | Office of the Under Secretary of War (Comptroller)Confirmed |
| FY2026 | RDT&E | $80.4M | $158M | — | — | Office of the Under Secretary of War (Comptroller)Confirmed |
| FY2026 | Procurement | $3.02B | $3.17B | 22 | — | Office of the Under Secretary of War (Comptroller)Confirmed |
| FY2026 | Total | $3.10B | $3.33B | 22 | — | Office of the Under Secretary of War (Comptroller)Confirmed |
| FY2025 | RDT&E | — | $56.2M | — | — | Office of the Under Secretary of War (Comptroller)Confirmed |
| FY2025 | Procurement | — | $1.85B | 18 | — | Office of the Under Secretary of War (Comptroller)Confirmed |
| FY2025 | Total | — | $1.90B | 18 | — | Office of the Under Secretary of War (Comptroller)Confirmed |
Unit costs and contract unit prices for this product, and budget figures for the programs that buy it. Each figure states its dollar basis and links its source; contract values are under Programs & awards.
News2
Sources16
- 1.
Air & Space Forces Magazine · Sep 30, 2026 · Supports: Cost · amount
“At $2.38 billion for 22 jets, the average cost works out to $108 million, which does not include engines”
- 2.
Sam Eckholm · Jul 29, 2026 · Supports: System · name
“F-15EX”
- 3.Government recordF-15EX visit offers first look at Indo-Pacific airpower evolution
U.S. Air Force · Jul 18, 2025 · Supports: System milestone
“arrived at Kadena Air Base, July 12, for integration and familiarization training with local units and joint partners.”
- 4.Government recordWeapon Systems Annual Assessment: DOD Leaders Should Ensure That Newer Programs Are Structured for Speed and Innovation — p. 72
U.S. Government Accountability Office · Jun 11, 2025 · Supports: Cost, System milestone
“$125.4”
- 5.Government recordF-15 EX Eagle II Makes Debut Landing at Portland Base
U.S. Air Force · Jun 26, 2024 · Supports: System milestone
“he landed the first F-15EX Eagle II at Portland Air National Guard base June 5.”
- 6.
Breaking Defense · Oct 26, 2023 · Supports: Cost · amount
“approximately $90 million for each aircraft in the program”
- 7.
Air & Space Forces Magazine · Oct 4, 2023 · Supports: Cost · amount
“The F-15EX Eagle II unit cost will be $93.95 million per plane in then-year dollars”
- 8.Government recordEagle II fires first missile during live-fire event
U.S. Air Force · Jan 31, 2022 · Supports: System milestone
“the F-15EX Eagle II, successfully fired an AIM-120D missile Jan. 25.”
- 9.Government recordAir Force receives first F-15EX
Air Force Materiel Command · Mar 11, 2021 · Supports: System, System milestone
“officially accepted the first F-15EX from the Boeing Co. on March 10, 2021”
- 10.
Forbes · Jul 24, 2020 · Supports: Cost · amount
“cited the per unit flyaway cost of F-15EX in the newly minted contract as $87.7 million, a figure including engines”
- 11.Government recordDAF awards contract for first lot of F-15EX fighter aircraft
U.S. Air Force · Jul 13, 2020 · Supports: System milestone
“a nearly $1.2 billion contract for its first lot of eight F-15EX fighter aircraft.”
- 12.
Defense News · Mar 12, 2019 · Supports: System milestone
“the Air Force’s budget seeks funding for 48 F-35As at $4.9 billion and eight new F-15EX planes for $1.1 billion.”
- 13.
Military.com · Mar 12, 2019 · Supports: System milestone
“balances readiness and modernization in the near-term by procuring eight F-15EX aircraft to refresh our”
- 14.
Office of the Under Secretary of War (Comptroller) · Supports: Cost · amount
“F-15EX Eagle II / F-15E Eagle ... 78.3 - 2.1 - 80.4 Procurement 24 2,775.5”
- 15.
Office of the Under Secretary of War (Comptroller) · Supports: Cost · amount
“F-15EX Eagle II / F-15E Eagle ... 3,173.4 3,331.1 24 24 133.3 2,963.0 3,096.3 -”
- 16.
GE Aerospace · Supports: System · system component:f110, System milestone
“Two F110-GE-129 engines powered the first flight of the Boeing F-15EX fighter on Feb. 2.”
Each fact on this page is attached to the sources that support it. Archived copies are linked when we keep one.