Cargo capacity and cost Comparatively, the 777-9 boasts a cargo capacity of 48 LD3 containers. The A350-1000's maximum takeoff weight is 316 tonnes (696,661 lbs), while the Boeing 777-9 weighs 181.4 tonnes (400,000 lbs) with a maximum takeoff weight of 351.5 tonnes (775,000 lbs).

The primary Boeing competitor to the Airbus A350 is the Boeing 777X family, specifically the 777-9. In 2026, the long-haul market is dominated by these two "flagship" twin-engine widebodies. The A350-900 and A350-1000 were designed to be incredibly fuel-efficient using carbon-fiber composites, and Boeing’s response was the 777X, which features the massive GE9X engines and revolutionary folding wingtips to fit into standard airport gates. While the A350 has a head start with nearly a decade of operational history, the 777-9 is slightly larger, typically seating between 380 and 420 passengers, compared to the A350-1000's 350 to 410. For slightly smaller routes, the Boeing 787-10 Dreamliner also competes with the entry-level A350-900, though the 787 is generally optimized for slightly shorter ranges. The competition in 2026 is fierce because both aircraft offer roughly 20-25% better fuel efficiency than the older 777-300ERs they are replacing. Airlines like Emirates, Qatar Airways, and United often operate both types, choosing the A350 for its ultra-long-range "thin" routes and the 777-9 for high-capacity "trunk" routes between major global hubs like London, Dubai, and New York.