Accounting for Carbon Neutrality at Delta Air Lines

In 2020, Delta Air Lines declared itself "the world's first carbon-neutral airline," relying heavily on voluntary carbon offsets while pursuing longer-term decarbonization strategies such as fleet renewal and sustainable aviation fuel (SAF). In 2023, Delta faced a class action lawsuit alleging that its carbon-neutral claims were false and misleading because the offsets it purchased did not truly neutralize its emissions. Set in a hard-to-abate industry under increasing regulatory and consumer scrutiny, the case examines how firms measure and substantiate carbon-neutral claims, focusing on the accounting treatment of offsets and sustainable aviation fuel (SAF). It also asks whether the lawsuit creates a contingent liability requiring disclosure or accrual under U.S. generally accepted accounting Principles (GAAP). The case invites students to analyze carbon measurement uncertainty, voluntary carbon markets, sustainability communication, and the intersection of Environmental, social, and governance (ESG) reporting and financial accounting.