Airlines shift from Airbus A340 to newer twinjets amid focus on efficiency

In terms of passenger capacity, both families are competitive: “the A340-600 carries around 380 passengers in a typical three-class layout, while the A350-1000 can carry between 350–410, depending on the airlines’ configuration.” The range also favors newer models; for example, “the Airbus A350 ULR and -1000 also extend range figures that the A340-500 once targeted,” but with improved fuel economy due to modern engines and lighter construction.

Airlines have been replacing their aging fleets of four-engine jets with more efficient twinjets like the Airbus A350 or Boeing’s alternatives. Edelweiss announced it would replace its five remaining A340-300s with six new A350-900s by end of 2026 as part of fleet renewal efforts focused on economy and sustainability goals. Similarly, SWISS will introduce new A350-900s from 2025 to phase out its remaining A340s. Lufthansa Group has confirmed further orders for A350 aircraft, planning to retire most of its quadjets over this period.

Other major European carriers such as Iberia and Air France have also retired their last four-engine widebodies during recent years’ restructuring efforts—a move accelerated by pandemic-era demand changes—and replaced them with new-generation twins like the Airbus A350 when deliveries became available.

While some specialized missions previously required specific versions like the ultra-long-range A340-500/-600, airlines today prefer aircraft that balance operational capability with lower fuel consumption per seat-mile and reduced emissions—factors where modern twins excel.

As noted by industry observers: “Measured only by fuselage length, the A340-600 > A350-1000 (about 247 ft 5 in / 75.3 m vs 242 ft 3 in / 73.78 m). But measured by cabin width, usable floor, range, and economics, the A350 family…is the practical winner for most airlines.”

Fleet renewal decisions continue to reflect these priorities as airlines focus on reducing costs while meeting sustainability targets.