Delta Air Lines was the largest operator of the Lockheed TriStar L-1011, a visually distinct aircraft distinguished by its third engine integrated into the fuselage. The L-1011 marked Delta's development and transformation, particularly on transatlantic routes.
The history of this aircraft began in the 1960s as airlines sought new long-range models. Lockheed developed the TriStar L-1011, a widebody aircraft, entering service in 1972, overcoming engine-related setbacks. Eastern Air Lines debuted the L-1011, and Delta acquired many of their planes following Eastern's dissolution in 1991.
Delta initially launched L-1011 services on December 15, 1973, from Atlanta to Philadelphia, gradually increasing its flights. The aircraft's long-range capabilities facilitated Delta's transatlantic reach, starting with flights to London Gatwick in 1978. In 1979, Delta became the first U.S. carrier to operate the L-1011-500 version, extending services to Hawaii and new European destinations.