Despite being among its oldest aircraft, Delta Air Lines’ Boeing 767s remain a key part of its long-haul operations. According to present fleet data made available by ch-aviation, the Atlanta-based US ‘big three’ legacy carrier and SkyTeam founding member currently has a grand total of 39 767-300ERs at its disposal with an average age of 29.9 years, and 21 767-400ERs aged 25.6 years on average.