The Airbus A340 is a long-range, four-engine aircraft developed by Airbus to serve intercontinental routes and compete in the global long-haul market. Launched in 1987 and entering service in 1993 with Lufthansa and Air France, it was designed at a time when ETOPS rules limited twin-engine aircraft on long overwater flights. The A340 family included four main variants—the A340-200, -300, -500, and -600—carrying roughly 250 to over 350 passengers. The later -500 and -600 models offered extended range and capacity, with the A340-500 capable of ultra-long-haul flights exceeding 16,000 km.
Powered by four engines such as the Rolls-Royce Trent 500 and CFM56, the A340 provided excellent range and reliability but at the cost of higher fuel consumption compared to newer twin-engine jets. It featured Airbus fly-by-wire controls and cockpit commonality with aircraft like the Airbus A320, making pilot training easier. However, with the rise of more efficient aircraft such as the Boeing 777 and Airbus A350, demand declined, leading to the end of production in 2011. Despite this, the A340 remains an important milestone in aviation history, known for its long-range capabilities and distinctive four-engine design.