Airbus launched the A330-300 in June 1987 alongside the four-engine A340. The two share a wing, a fuselage cross-section and a cockpit, and differ mainly in engine count. Sharing parts across two aircraft cut development cost for both. The A330 was aimed at busy regional routes and medium long-haul flying, where one big twin made better economic sense than four engines. Customers could then pick whichever version suited them.
It first flew on November 2, 1992. French domestic carrier Air Inter began service in January 1994, making it one of the largest aircraft ever used on scheduled domestic hops. Cockpit commonality with the A320 helped airlines adopt it quickly. The start was slow, but higher weights and extra range later turned it into one of the most successful widebodies ever built. Orders climbed steadily from the late 1990s.
Well over 700 were built. It became the backbone of Asian widebody flying at Cathay Pacific, China Airlines and Singapore Airlines, while Delta, Lufthansa and Turkish flew it across the Atlantic. Production ran for more than 25 years and outlasted the A340 by a decade. Passenger-to-freighter conversions are growing fast, and the airframe lives on as the A330-900neo. The type remains widely flown around the world today.