The A350-900 has a range of 7,500 nautical miles (13,900 kilometers), and the third-class cabin layout can accommodate 285 seats. A350-900 has the lowest seat-mile cost among aircraft of the same class, which can attract the airline users of A330-200, and it is easy to add this large-capacity aircraft to its existing fleet, which is economically attractive for those airlines that need to update the existing heavy and aging twin-engine aircraft. A330-900 is suitable for all major European-American city pairs, major city pairs in the Asia-Pacific region, emerging Middle East hubs and routes between all European, African and many Asian city pairs.

These performances are mainly due to the adoption of a large number of technologies developed and applied for A380, as well as innovation in production. The A350 will use a lot of light composite materials and other new materials, such as carbon fiber reinforced plastics (CFRP) and aluminum-lithium alloy. The wing of A350 will be mainly made of CFRP. Moreover, by adopting the most advanced design and manufacturing technology, and integrating the slat drooping technology of A380, the wing of A350 has outstanding low-speed and high-speed efficiency.