Shares of Delta Air Lines Inc. are leading the S&P 500 index Thursday, buoyed by the carrier’s better-than-expected second-quarter results and the company’s decision to restore its full-year guidance.

Delta Air Lines’ recent success set off a debate on Wall Street on whether the airline sector is primed to repeat a late-year rally.

United Airlines Holdings Inc. late Wednesday refined its 2025 profit outlook, joining Delta Air Lines Inc. in giving investors some hope for the industry, but a mixed earnings snapshot and lingering ...

American Airlines reissued full-year adjusted earnings guidance, setting a lower target than it had earlier in the year before tariffs and a domestic travel slowdown prompted major airlines to ...