Boeing 777 freighter conversions dominated a panel session at the TIACA Air Cargo Forum last month, as manufacturers and operators debated how far converted widebodies can fill the gap before new-build aircraft arrive in numbers. Air Cargo News broke the story through its own reporting from the event.
Moderating the session, entitled "Freighter at the Forefront", was Martin Drew, Atlas Air's chief strategy and transformation officer. Among the panellists were John Perdoch, Boeing's director of product marketing for freighters, and Bernard De L'Estoile, who holds the role of senior director of freighter marketing at Airbus.
Three Programmes, One Market
All three of the widebody 777 passenger-to-freighter conversion programmes currently vying for customers made headlines during 2025. IAI joined forces with Ascent Aviation Services and World Star Aviation to launch 777-300ERSF conversions in North America, having been the first of the three programmes to reach the market. That head start meant the first converted aircraft entered commercial service in September 2025.
In January, Kansas Modification Center (KMC) disclosed it had passed a cargo door milestone on its 777-300ERCF programme and expects to begin flight testing and the STC process in Q3. Mammoth Freighters, for its part, secured FAA Supplemental Type Certification for its 777-200LRMF conversion in April and is targeting FAA certification of its 777-300ERMF variant in 2026.
Readers wanting to explore the aircraft types involved can use our Aircraft Search to look up individual airframes and their histories.
Why the Industry Is Turning to Conversions
Boeing's Perdoch framed the current appetite for conversions as a structural response to a supply problem. "We are in a supply shortage in this industry, especially in the large widebody space, and so it's natural for the industry to look for a way to bridge their fleets today into their future fleets," he told the panel.
That bridging role is being driven partly by the time it will take for the next generation of purpose-built freighters to arrive in meaningful numbers. Both Boeing's 777-8F and the Airbus A350F are coming to market, but operators need capacity now. Converted 777s, with large main-deck volumes drawn from one of the most capable widebody platforms ever built, offer a practical interim answer.
Where Conversions Fall Short
Neither Boeing nor Airbus suggested conversions are a straight substitute for new-build aircraft. Perdoch acknowledged a converted aircraft offers "maybe not quite as much payload, not quite as low a fuel burn as a newbuild," while still describing the transition as "super smooth" given current market conditions.
Airbus's De L'Estoile was more pointed about the operational boundaries. "A converted freighter to me works well if the utilisation is low, because as soon as the utilisation is high then fuel burn kicks in, especially on long ranges," he said. He added that conversions "will not be ideal for everything and (for every operator) because they come with challenges, (they) come with limitations as well for operations."
The distinction matters. An operator running regional or medium-haul routes at moderate frequency will see a different economic picture from one cycling aircraft hard across transpacific lanes.
777 Freighter Conversions and the Bigger Picture
The concentration of three separate 777 conversion programmes in the same market window is unusual. It reflects both the scale of demand and the relative abundance of passenger 777-300ERs reaching the end of their passenger lives as airlines modernise their long-haul fleets with A350s and 787s.
From our perspective, the TIACA panel underlines a tension the cargo industry will need to manage for several years. The converted fleet is growing, the new-build order books are full, and operators are making commitments now that will shape their cost structures well into the next decade. How individual airlines balance utilisation, range and fuel economics against acquisition cost will vary considerably, and the panel made clear there is no universal answer.
The Bottom Line
The 777 freighter conversion market is active and competitive, with three programmes at different stages and the first IAI-converted aircraft already flying commercially. Boeing and Airbus both see a legitimate role for conversions as a bridge to the next generation of purpose-built freighters, but both are candid that the economics depend heavily on how hard and how far operators intend to fly them.
Continue to follow The Aviation Hub for more analysis and insight.
Advertise with us Your brand, in front of an aviation audience Home page and in-article placements, sold directly, one advertiser per slot. From £250 a year. See the rates
.jpg){kind=link}