Delta equips entire Boeing 737NG fleet with fuel-saving Finlets

International

Aerodynamic modification will be installed on 240 aircraft to reduce fuel consumption and carbon emissions

Delta Air Lines is expanding its fleet efficiency programme by introducing Finlets from Vortex Control Technologies (VCT) across its entire Boeing 737-800 and 737-900ER fleet. Once completed, the modification will be installed on 240 aircraft, following an extensive evaluation of the technology's aerodynamic and operational performance.

The decision follows a comprehensive collaboration between Delta and VCT that included flight testing, engineering assessments and analysis of operational data. The programme forms part of Delta's long-term strategy to improve fuel efficiency and reduce carbon emissions through practical fleet enhancements.

Aerodynamic technology improves efficiency

Finlets are aerodynamic devices fitted to the rear fuselage of an aircraft. They optimise airflow, reduce drag and improve pressure distribution, resulting in lower fuel consumption and reduced emissions.

“Equipping these Boeing 737-800 and 737-900ER fleets with Finlets represents a significant milestone for VCT. We are proud to provide a practical technology that helps airlines improve fuel efficiency, reduce carbon emissions and enhance operating economics,” said Gil Morgan, Chief Executive Officer of Vortex Control Technologies.

Data-driven approach to fleet upgrades

The introduction of Finlets builds on Delta's long-standing strategy of improving aircraft performance through targeted fleet modifications. Before approving the installation, the airline conducted an extensive validation process that included flight tests, operational trend analysis and computational fluid dynamics (CFD) modelling of its Boeing 737NG fleet.

The programme is designed to support lower fuel burn, improved operating efficiency and reduced environmental impact across one of the airline's largest narrowbody fleets.

Supporting long-term sustainability goals

Around 90% of Delta's carbon emissions are generated through jet fuel consumption, making efficiency improvements a key part of the airline's sustainability strategy. Technologies such as Finlets are intended to help reduce emissions while delivering long-term operational benefits.

“Delta seeks out partners and innovations that enhance performance, reduce environmental impact and generate long-term operational benefits,” said Amelia DeLuca, Delta's Chief Sustainability Officer. “We appreciate the strong partnership with VCT throughout the evaluation process and are looking forward to this implementation to further support our ongoing fleet efficiency initiatives.”

With the fleet-wide rollout, Delta continues to invest in operational improvements that contribute to its broader environmental commitments while enhancing aircraft performance.