Delta Air Lines has operated the three 767 variants, namely, the 767-200, 767-300ER, and 767-400ER, and all of its former fleet of 15 Boeing 767-200ERs are now retired.

Australian startup MicroTau is working with Delta Air Lines to test its drag-reducing riblet film on the Boeing 767. This adds to an existing agreement with Australia’s JetStar Airways to test ...