Delta Air Lines will install a finlet modification package from Vortex Control Technologies (VCT) across its Boeing 737-800 and 737-900ER fleet, bringing the enhancement to 240 aircraft once installation has been completed. The implementation advances Delta's ongoing efforts to improve fleet efficiency across its global operation by reducing fuel consumption and carbon emissions. Approximately 90% of Delta's carbon emissions originate from jet fuel consumption, making such modifications critical to its environmental strategy.

The decision follows a comprehensive technical collaboration and in-service evaluation between the two companies. The assessment encompassed flight test validation, analysis of operational trends, and an engineering review of aerodynamic performance using computational fluid dynamics (CFD) analysis on Delta's 737NG aircraft.

How Finlets Work

Finlets are aerodynamic devices installed on the aft fuselage of an aircraft. They reshape airflow, reduce drag, and improve fuel efficiency by reducing flow separation and improving pressure distribution along the aft fuselage. This results in lower fuel consumption and reduced carbon emissions.

Fleet Impact and Sustainability Goals

The finlet implementation builds on Delta's ongoing fleet modification approach, driven by a rigorous evaluation process cemented with safety and strategy in mind. The airline's decision reflects a continued focus on reducing fuel consumption, lowering emissions, and improving operational efficiency through practical, data-driven solutions.

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

Delta seeks out partners and innovations that enhance performance, reduce environmental impact, and generate long-term operational benefits. "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," said Amelia DeLuca, Delta's Chief Sustainability Officer.

The U.S. Department of Transportation has closed its investigation into Delta Air Lines' handling of the July 2024 CrowdStrike Holdings Inc. outage without taking enforcement action. The decision, disclosed publicly on Monday, spares the carrier from penalties despite widespread disruptions that affected more than 1.3 million travelers and cost the company an estimated $500 million.

The review found that Delta provided prompt refunds, baggage assistance, and appropriate support for passengers with disabilities during the crisis. The Transportation Department instructed Delta to continue providing timely notifications to passengers regarding their refund rights but determined that no further action was warranted.

Investigation Background

The investigation was launched under the Joe Biden administration after Delta took significantly longer than other major U.S. carriers to recover from the global software outage triggered by cybersecurity firm CrowdStrike. The disruption led to thousands of canceled flights and widespread travel delays across the airline's network.

Delta welcomed the decision, stating that regulators recognized the extraordinary circumstances surrounding the outage.

Regulatory Context

The move comes as the Donald Trump administration has scaled back several aviation consumer-protection actions initiated during the previous administration. In December, the Transportation Department waived an $11 million penalty tied to a settlement with Southwest Airlines Co over its 2022 holiday travel meltdown. The agency also waived $16.7 million in penalties imposed on American Airlines Group Inc as part of a settlement involving the treatment of passengers with disabilities and wheelchair handling.

Delta Air Lines shares closed Monday at $84.07, up 1.22%, and edged down 0.24% to $83.87 in after-hours trading.