Exhibit 99.1 CONTACT: Investor Relations Corporate Communications 404-715-2170 404-715-2554 InvestorRelations@delta.com Media@delta.com Delta Air Lines Announces March Quarter 2024 Financial Results Delivered industry-leading operational performance, record March quarter completion factor March quarter revenue and earnings at the high end of guidance Expect record June quarter revenue, mid-teens operating margin, and EPS of $2.20 to $2.50 Reiterating 2024 outlook for EPS of $6 to $7 and free cash flow of $3 ...