Delta Air Lines to deploy Finlets on its Boeing 738-800 and 737-900ER... wait.. Finlets? - Economy Class & Beyond

Delta Air Lines to deploy Finlets on its Boeing 738-800 and 737-900ER... wait.. Finlets? describes Delta’s plan to fit Vortex Control Technologies (VCT) finlet modifications across part of its Boeing 737 fleet. The airline will install finlets on 240 aircraft, specifically Boeing 737-800 and 737-900ER models, aiming to cut fuel use and emissions. The article explains that finlets are aerodynamic devices mounted on the aft fuselage that change airflow to reduce drag by reshaping vortices and improving pressure distribution. Delta said the implementation follows a safety- and strategy-driven evaluation that included flight-test validation, operational trend analysis, and aerodynamic review using computational fluid dynamics (CFD) based on its 737NG operations. Delta and VCT conducted a trial and decided to proceed after analyzing flight-test data and in-service performance. Delta’s Chief Sustainability Officer emphasized the airline’s focus on reducing environmental impact while improving long-term operating economics.