Spirit is in dire financial straits, and experts believe its collapse could trigger shifts across the low-cost airline sector ...

Spirit Airlines stock plummeted 40% after it warned it could go out of business, while Frontier rose 29%. Less competition could mean higher prices.

Spirit Airlines has warned of going-concern doubts, just months after emerging from bankruptcy as weak domestic demand and dwindling cash reserves strain its operations.

Spirit Airlines is preparing to furlough 270 pilots this fall. The furloughs will go into effect on November 1, the budget-friendly airline said on Monday. An additional 140 pilots will be ...