The low-fare carrier has struggled to find its footing after its planned merger with JetBlue was blocked by a federal judge.

The announcement comes before the busiest travel weekend, Thanksgiving, but the airline assured its customers that the tickets they booked are still active and future fares will also be.

Spirit Airlines says it will continue flying as it files for Chapter 11 bankruptcy protection. Monday's announcement follows years of losses and a failed merger attempt for the low-cost carrier.