United Delays A350 Delivery Timeline as Rolls-Royce Dispute Escalates
Chicago, United States — United Airlines has effectively shelved its 16-year-old order for 45 Airbus A350-900 widebody jets after disclosing a contractual fight with Rolls-Royce, the sole engine supplier for the aircraft, in an annual regulatory filing published Thursday.
The carrier’s latest 10-K report filed with the U.S. Securities and Exchange Commission revealed that while 45 A350s remain listed as contractual commitments for delivery after 2027, they have been scrubbed entirely from United’s expected delivery schedule — a stark departure from prior filings that had consistently acknowledged the aircraft as part of the airline’s forward-looking fleet assumptions. In plain terms, United is telling its investors it doesn’t plan to actually take the planes.
A $175 Million Flashpoint
At the center of the upheaval is a dispute over engine purchase and maintenance agreements United signed with Rolls-Royce back in 2010. The airline said it paid the British engine manufacturer $175 million in 2017 as a commitment under those agreements. Then, in December 2025, United alleged that Rolls-Royce breached the contract’s terms and demanded repayment of the full sum plus additional contractual escalation charges.
Rolls-Royce didn’t pay up. Instead, according to United’s filing, the engine maker terminated the agreements altogether and countered that United itself was the party in breach. Both sides now contend the other owes damages, and legal proceedings are underway. A Rolls-Royce spokesperson said the company had met its obligations under the agreements and expressed confidence in its legal position, though declined to elaborate due to the pending litigation. The spokesperson characterized United as a “valued customer” and said Rolls-Royce looked forward to resolving what it described as a “historic issue.”
Sixteen Years of Deferrals
The A350 saga is one of commercial aviation’s most protracted procurement stories. United first ordered 25 A350-900s in 2009, before its merger with Continental Airlines — a carrier that had been deeply aligned with Boeing and maintained exclusive purchasing ties with the Chicago manufacturer. After the merger closed in 2010, the combined airline inherited a fleet philosophy that leaned heavily toward Boeing widebodies. In 2013, United converted its A350-900 commitment into 35 of the larger A350-1000 variant and added additional orders. Four years later, the airline reversed course again, switching the entire order back to 45 A350-900s. Deliveries were pushed from an original window of 2016–2019 to beyond 2022, then beyond 2026, and most recently to after 2027. Not a single airframe has ever been delivered.
CEO Scott Kirby told The Airline Observer in September 2025 that United expected to announce a decision on the A350 order before year’s end, framing it as part of a broader evaluation of the carrier’s long-term widebody replacement needs. That announcement never came. What arrived instead was the Rolls-Royce dispute disclosure.
The Three-Way Tangle
Industry analysts note that large-scale jet procurement deals involve intricate triangular relationships between the airline, the airframe manufacturer, and the engine supplier. Because Rolls-Royce’s Trent XWB is the only powerplant certified for the A350 family, a breakdown in the engine relationship effectively blocks United from operating the aircraft — regardless of what it decides with Airbus. United’s SEC filing hinted at broader fallout, stating the airline “is also considering further implications of this dispute with respect to other parties.” That language is widely interpreted as a reference to Airbus, which has so far declined to comment on the situation. The European manufacturer continues to list the 45-aircraft commitment on its published order backlog, a move industry sources describe as a routine step to preserve its contractual rights.
Airbus and United reportedly finalized an amendment to the A350 purchase agreement on Dec. 23, 2025, though the details remain confidential.
What Fills the Gap?
The timing raises pointed questions about United’s widebody strategy. The airline operates 96 Boeing 777-200, 777-200ER, and 777-300ER aircraft — some of the oldest frames in the fleet, with certain 777-200s exceeding 30 years of service. An investor update issued in January indicated no planned 777 retirements through 2026, but the fleet’s age makes replacement inevitable. United has staked much of its widebody future on the Boeing 787 Dreamliner. The carrier expects to take delivery of 20 new 787-9s this year, which it says would represent the largest widebody intake by a U.S. passenger airline since 1988. With over 80 Dreamliners already flying and outstanding commitments for 140 more — including 56 recently converted from 787-9 to the larger 787-10 variant — United’s long-haul fleet is increasingly a single-type Boeing operation.
But 787s alone may not fully address the capacity gap left by aging 777s on the airline’s densest long-haul routes. The A350, with its larger cabin and ultra-long-range capability, had been positioned as a potential complement. Without it, United’s options narrow to waiting for Boeing’s repeatedly delayed 777X program or doubling down further on the Dreamliner family. Repeated deferrals over the years had already fueled speculation that United might cancel the A350 order outright or convert it into narrowbody A321neo-family jets, which the carrier has ordered in significant numbers. The Rolls-Royce dispute may have simply provided the exit ramp the airline was looking for — or, depending on how the legal battle unfolds, created complications neither party anticipated.
For an order that’s been in a holding pattern since 2009, the question is no longer whether United’s A350s will arrive late. It’s whether they’ll arrive at all.
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