Airlines stocks took off on Thursday, boosted by Delta reporting better-than-expected earnings and reinstating its full-year guidance. Here are the key chart levels to monitor for shares of three major U.

Delta's strong Q2 earnings and bullish forecast is boosting confidence across the airline industry Thursday. United and American shares are rising on investor optimism and expectations of similar performance.

What Happened? Shares of airline company United Airlines Holdings (NASDAQ:UAL) jumped 13.1% in the morning session after after rival Delta Air Lines reported strong second-quarter earnings and reinstated its full-year guidance,

Delta Air Lines could be adding a basic version of its higher-end fares, and teased a growing number of premium seats in the future.

Which major US airline, in particular, American Airlines,Delta Air Lines, or United Airlines, currently operates the largest mainline fleet? This question matters because fleet size impacts everything from route lengths and flight frequency to operational flexibility and cost efficiency,

Delta Air Lines said on Thursday its bookings have stabilized, prompting it to forecast a brighter profit outlook for coming quarters, even as

After withdrawing its outlook in April, Delta is again forecasting a profit—though at a significantly lower level than originally projected.

Delta Air Lines' strong earnings and projected growth provided an early boom for the airline industry as the rest of the major carriers prepare to report.

Delta's revenue from premium seats like business class rose 6% in the first half of the year to $10.6 billion, while main cabin economy ticket revenue dropped 4% to $11.7 billion. The carrier, the most profitable U.S. airline, has said for years that its share of sales from high-end seats and its lucrative loyalty program has been growing.

United will be the first U.S. carrier to resume flights to Israel since the country’s latest war with Iran began in mid-June.