Budget carrier Spirit Airlines said Friday that it has filed for fresh bankruptcy protection months after emerging from a Chapter 11 reorganization.

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Spirit Airlines has filed for fresh bankruptcy protection months after emerging from a Chapter 11 reorganization

The budget carrier said on Friday that it would continue operating as normal during the voluntary restructuring, and customers still can book trips and use tickets

Spirit's parent company recently expressed "substantial doubt" about its financial future, citing weak demand for domestic leisure travel and ongoing market challenges

Despite cost-cutting efforts, including pilot furloughs, Spirit says it needs more cash and may sell aircraft and real estate

The ultra low-cost airline said it plans to keep fly

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