Top 10 Passenger-to-Freighter Conversion Providers (2026)
Ranked: the top P2F conversion providers in 2026, from EFW and Boeing to IAI, Mammoth, AEI and Embraer. Compare A321P2F, 737-800BCF, A330P2F and 777-300ERSF programs, conversion lines and what to check before booking a slot.
The 10 Leading P2F Freighter Conversion Houses and Programs in 2026
Passenger-to-freighter conversion slots have become one of the scarcest products in aviation. New-build freighter deliveries remain tight, express and e-commerce networks keep adding lift, and operators that want a converted A321, 737-800, A330, 767 or 777 often have to reserve an induction slot long before they have secured the donor aircraft. Choosing the right conversion house now shapes fleet plans years ahead.
The market is concentrated. A handful of companies hold the supplemental type certificates (STCs) for the main programs, and a wider network of MRO partners runs the conversion lines on their behalf. Some providers own the engineering, some run the hangars, and a few do both.
This ranking covers the leading passenger-to-freighter (P2F) conversion program holders and conversion line operators in 2026. Providers were assessed on certified programs, redelivery track record, line capacity, the strength of their customer base and how relevant their aircraft types are to cargo operators and lessors today.
The leading passenger-to-freighter conversion providers
Elbe Flugzeugwerke (EFW)
EFW is the reference conversion house for Airbus freighters. It is a joint venture in which ST Engineering holds 55% and Airbus 45%, which gives its programs direct access to OEM data, a factor lessors weigh heavily when they assess residual values.
By March 2025, EFW had redelivered 50 A321P2Fs, 54 A330P2Fs and five A320P2Fs, and more than 300 converted freighters across both its current and earlier A300 and A310 programs. It reported a backlog of roughly 100 aircraft at that point.
The A321P2F is now the default choice for express and e-commerce operators replacing 757s and older 737 freighters. The A330P2F covers medium-haul widebody demand that sits below the 777 class.
Boeing Converted Freighters
Boeing's BCF program is the largest OEM-backed source of Boeing narrowbody and midsize widebody freighters. The 737-800BCF competes directly with the A321P2F for express and regional cargo work, while the 767-300BCF remains a workhorse for integrators.
Boeing runs conversions through a network of partner lines rather than a single site. In 2021 it announced new 737-800BCF lines at its London Gatwick MRO and at KF Aerospace in Canada, alongside existing capacity at GAMECO in Guangzhou and COOPESA in Costa Rica. At that time the 737-800BCF already had more than 200 orders and commitments from 19 customers.
Israel Aerospace Industries (IAI)
IAI is the most established independent conversion house and the first to bring a converted 777 to market. Its 777-300ERSF, branded the Big Twin, entered service with launch operator Kalitta Air and opened up a large pool of retiring 777-300ERs as freighter feedstock.
The program took another step in 2026. Emirates took its first IAI-converted 777-300ERSF, ferried from Tel Aviv to Abu Dhabi on 28 May 2026, and plans to convert at least ten of its own 777s.
IAI also runs mature narrowbody and midsize programs on the 737-800 and 767-300, giving buyers a non-OEM alternative across three size classes.
ST Engineering
ST Engineering sits behind much of the Airbus conversion market. As EFW's majority shareholder, it co-developed the Airbus P2F programs, and its own MRO network provides conversion capacity alongside EFW's sites. The first A320P2F was redelivered jointly by EFW and ST Engineering.
For buyers, ST Engineering matters as a capacity provider. When EFW slots are tight, its hangars are often part of the answer, and its scale as one of the largest airframe MRO groups gives lessors comfort on delivery risk.
Mammoth Freighters
Mammoth Freighters is the newest serious entrant in large widebody conversions, offering a second 777 program alongside IAI. It is the only provider converting the 777-200LR, a relatively small pool of aircraft but one with long-range capability that suits ultra-long cargo sectors.
In August 2026, Mammoth delivered the first 777-200LRMF to lessor Jetran, the first of more than two dozen Jetran has ordered. Thirteen are due to enter service with DHL, and Qatar Airways is expected to receive aircraft in Jetran's next deliveries. The larger 777-300ERMF was still awaiting certification at that point.
Aeronautical Engineers Inc. (AEI)
AEI is a long-standing independent converter with one of the broadest narrowbody and regional portfolios in the market. Its 737-800SF is the main independent rival to Boeing's 737-800BCF and holds approvals beyond the FAA, including a Malaysian STC.
Freighter lessors have used AEI for repeat programs, including 737-800SF conversions for Aviation Holdings. Its CRJ200 and older 737 programs also serve feeder and small-package operators that larger converters do not target.
321 Precision Conversions
321 Precision Conversions gives the A321 market an alternative to EFW. Its A321-200PCF earned EASA approval in January 2024, which opened the program to European operators.
The business started as a joint venture between Precision Aircraft Solutions and ATSG's CAM. Precision later took over CAM's stake. Precision also brings experience from its 757-200PCF program, still relevant to operators flying 757 freighters.
Embraer
Embraer's E-Freighter fills the gap below the A321 and 737. The E190F received full FAA certification in 2024 and can carry up to 13.5 tonnes with more than 100 cubic metres of volume across both decks.
Adoption is early but building. Malta-based Bridges Air Cargo became the first operator in March 2026, and BermudAir is set to become the second, leasing its aircraft from Regional One, which holds five firm orders.
KF Aerospace
KF Aerospace is one of the most relevant independent conversion line operators for Boeing narrowbodies. It was selected to host two 737-800BCF conversion lines, adding North American capacity to Boeing's program.
For buyers, the value lies in combined capability. KF is a heavy maintenance MRO as well as a conversion site, so airframe checks, cabin removal and conversion can be planned as a single induction.
Etihad Engineering
Etihad Engineering is the main Gulf conversion site. It partnered with IAI to perform passenger-to-freighter conversions in Abu Dhabi, including the 777-300ERSF, giving Middle East operators conversion capacity close to home.
With Gulf carriers retiring 777-300ERs and looking at freighter conversions for their own cargo divisions, a regional site cuts ferry time and simplifies redelivery for customers in the region.
P2F conversion providers compared
| Provider | Role | Key programs | Recent milestone |
|---|---|---|---|
| EFW | STC holder and converter | A320P2F / A321P2F / A330P2F | 109 new-generation redeliveries and around 100 in backlog (March 2025) |
| Boeing Converted Freighters | OEM program holder | 737-800BCF / 767-300BCF | Partner lines in the UK, Canada, China and Costa Rica |
| IAI | STC holder and converter | 737-800BDSF / 767-300BDSF / 777-300ERSF | First Emirates 777-300ERSF (May 2026) |
| ST Engineering | Co-developer and converter | A320 / A321 / A330 P2F | 55% owner of EFW |
| Mammoth Freighters | STC holder | 777-200LRMF / 777-300ERMF | First 777-200LRMF to Jetran (August 2026) |
| AEI | STC holder | 737-800SF / 737-400SF / CRJ200SF | Repeat 737-800SF programs for freighter lessors |
| 321 Precision Conversions | STC holder | A321-200PCF / 757-200PCF | EASA approval for A321-200PCF (2024) |
| Embraer | OEM program holder | E190F / E195F | First operator Bridges Air Cargo (March 2026) |
| KF Aerospace | Conversion line operator | 737-800BCF | Two Boeing BCF lines in Kelowna |
| Etihad Engineering | Conversion line operator | 777-300ERSF (IAI) | Gulf conversion site for IAI programs |
Which aircraft are being converted?
Conversion demand follows the passenger fleet. The best feedstock is a type that airlines are retiring in volume, with a long freighter life ahead and a program that lessors trust for residual value.
For type-specific economics, see ACMIWorld's guides to P2F conversion economics, new-build freighters versus P2F conversions and the 737-800BCF versus A321P2F comparison. Operator-side options are covered in our guides to the A321P2F ACMI lease, the A330-300P2F cargo lease and the E190F cargo lease.
What to check before booking a conversion slot
The conversion price is only one part of the decision. A credible comparison should cover the full technical, regulatory and commercial picture.
- STC validation: confirm the program is approved by the authority of the registry state where the freighter will operate, not only by the FAA or EASA.
- Slot timing: induction dates are often committed long before the donor aircraft is secured. Check what happens if feedstock arrives late.
- Donor aircraft condition: airframe age, cycles, corrosion history and records quality drive both conversion cost and residual value.
- Engine and LLP status: a converted airframe with short-life engines can cost more than the conversion itself to put into service.
- Combined shop visit: aligning the conversion with a heavy check reduces downtime and duplicated labour.
- Payload and volume specs: confirm main deck positions, door size, floor loading and structural payload against the network the aircraft will fly.
- Lessor and lender acceptance: some financiers prefer OEM-backed programs. Check acceptability before committing.
- Warranty and support: agree warranty terms, AOG support and the converter's continuing engineering role after redelivery.
ACMIWorld's guide to main deck cargo door size and freighter selection covers the technical fit, and our ranking of aircraft technical due diligence firms lists specialists who inspect donor aircraft before induction.
How P2F conversion pricing and timing work
Conversion houses usually quote a fixed program price for the modification kit and labour, with the donor aircraft, heavy maintenance, engine work and any non-routine findings priced separately. Most providers take a deposit to secure an induction slot, with further payments tied to milestones through the conversion.
Downtime varies by type and site, and it lengthens when the conversion is combined with a heavy check or the airframe needs significant structural repair. Ferry costs to and from the conversion site, records work and redelivery inspections all add to the total cost. Operators who need lift while their aircraft is in the hangar often bridge the gap with cargo ACMI capacity, priced as set out in our guide to cargo ACMI pricing per block hour.
Why demand for conversion slots stays high
New-build freighter production cannot meet demand on its own. Delays to new widebody freighter programs and long delivery queues push operators toward converted aircraft, which reach service sooner and cost far less to acquire.
Feedstock is the second driver. As passenger airlines retire mid-life A321s, 737-800s, A330s and 777-300ERs, lessors look for a second life for those airframes. Conversion turns a declining passenger asset into a freighter with many years of earning potential.
The result is a market where slots are planned years ahead. For a wider view of freighter economics, see ACMIWorld's guides to narrowbody freighter economics and widebody freighter economics, and our article on cargo aircraft maintenance reserves and lease returns.
Final view
EFW and Boeing remain the anchor programs for narrowbody and midsize conversions, backed by OEM engineering that lessors and lenders value. IAI leads the widebody field and now has Emirates as a customer for its 777-300ERSF, while Mammoth has entered service with its first 777-200LRMF.
AEI, 321 Precision Conversions and Embraer give buyers alternatives on the 737, A321 and regional jet, and line operators such as ST Engineering, KF Aerospace and Etihad Engineering provide much of the hangar capacity that keeps programs moving.
For buyers, the key question is not which converter has the best brochure. It is which provider has a certified program for the right type, a slot that matches the donor aircraft timeline and the regulatory approvals, support and financing acceptance needed to put the freighter to work.
Need freighter capacity before your conversion slot?
A321P2F, 737-800BCF, A330P2F, 767 and 777 freighter requirements need to be matched against live aircraft availability, base location, contract length and expected utilization. For aircraft leasing enquiries, visit Blue Cube Aviation.
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