Frontier and Spirit Airlines will once again try to merge, only months after the Biden administration won a key antitrust court battle to block an attempt by JetBlue to buy Spirit. A combination of ...

Low-cost carrier Spirit Airlines has rejected a second bid to merge with Frontier Airlines, saying the Denver-based airline’s offer was too low. Frontier said in a statement Wednesday that the merger ...

Frontier said a merger would be better for long-term viability, making the combination the fifth largest airline in the United States and producing at least $600 million in operational savings. It ...