Berkshire Hathaway’s sudden $2.6 billion stake in Delta has the market buzzing while another billionaire quietly sold his positions in American and United, creating a stark contrast between two investing titans. This piece walks through why Warren Buffett looks comfortable buying into Delta today, why David Tepper is stepping back from AAL and UAL, and what the latest quarterly numbers reveal about airlines battling fuel costs, pricing power, and shifting demand. Read on for a clear-eyed look at the numbers, the strategy differences, and what this split in billionaire sentiment could mean for airline stocks.

As Berkshire Buys Delta Airlines, This Billionaire Just Sold Off AAL and UAL Stocks

Buffett famously avoided airlines for years, calling the industry a capital trap open to fuel shocks, fare wars, and economic swings. When COVID-19 hit, Berkshire dumped airline shares at big losses, and Buffett candidly said, “The world has changed for the airlines. And I don’t know how it’s changed and I hope it corrects itself in a reasonably prompt way .” His return now signals a sharply different read on the sector.

Berkshire’s recent $2.6 billion position in Delta looks like vote of confidence rather than a speculative punt. Delta’s Q1 showed record revenue, strong adjusted EPS growth, and healthy free cash flow, giving Berkshire a tangible performance story to justify the move. That combination of rising fares, premium demand, and a profitable partnership with American Express has Delta looking steadier than the typical airline headline risk.

Delta posted $14.2 billion in revenue, a mid-single-digit top-line lift, and a 42% jump in adjusted EPS, while generating meaningful free cash flow and a double-digit return on invested capital. The carrier has been trimming marginal routes and leaning into higher-yield traffic, including corporate bookings and premium cabins. Those operational choices have helped it manage fuel pressure and keep unit economics improving even as jet fuel trends spike amid geopolitical tensions.

On the other side, Appaloosa Management’s disclosure that it exited AAL and UAL in Q1 is a clear sign of caution. Tepper’s move reflects worry about rising jet fuel costs, squeezed margins, and the fact that a sudden geopolitical event can erase gains fast. It’s not just a timing call; it’s a statement that the downside risk looks meaningful enough to close positions now.

American Airlines has a massive network and recent record revenues, but profitability remains inconsistent and highly sensitive to costs. Q1 showed revenue strength and improving passenger metrics, but operating expenses climbed sharply and the firm still recorded an adjusted loss per share. The balance between robust demand and stubborn cost pressure keeps AAL in a precarious spot for investors looking for steady returns.

United posted its own record quarter, with revenue and adjusted EPS ahead of expectations, yet it has trimmed guidance as fuel costs jumped. UAL is leaning into fare discipline and capacity controls to protect margins, even as international demand and loyalty revenue look solid. The company’s cash position is comfortable, but rising fuel and possible demand softness keep the risk profile elevated for shareholders.

Valuations across the sector now show both opportunity and skepticism, with many airline stocks trading at discounted multiples that reflect higher perceived risk. Analysts still see upside for names like United, but their models bake in a recovery after a painful 2026 that accounts for volatile fuel prices. That gap between analyst optimism and hedge fund caution is exactly the tension investors are watching closely.

The split between Buffett and Tepper is instructive: Buffett is buying into Delta’s execution and pricing power, while Tepper is protecting capital against a murkier macro picture. Investors should treat both actions as data points rather than gospel, weighing Delta’s operational gains against the broader industry’s exposure to fuel, labor, and geopolitical shocks. Patience and position-sizing matter more than ever when volatility can swing airline fortunes quickly.

For anyone tracking airline names, the key is not to chase headline returns but to focus on which carriers have durable pricing power, clear cost-control plans, and realistic guidance. Delta’s current metrics give a plausible rationale for a strategic stake, while exits in AAL and UAL underline that not every airline is ready for sustained margin expansion. Keep a cautious, evidence-driven approach and expect more headline-driven volatility as geopolitical events and fuel markets continue to test the sector.