British Airways has ordered 42 Boeing 777-9 aircraft to modernize its long-haul fleet.
Eighteen aircraft are firm orders, supplemented by 24 other options. The Twinjet will be equipped with 325 seats in a four-class configuration.
A parent of BA, IAG, disclosed the decision.
It indicates that the 777-9 will be used to replace 14 Boeing 747-400s as well as four 777-200s during the period 2022-2025.
All 777-9 will be powered by General Electric GE9X engines, and the agreement includes a set of "comprehensive" support services, IAG said.
IAG General Manager Willie Walsh said the 777-9 was the "ideal replacement" for the 747.