Spirit Airlines is reportedly planning to file for bankruptcy protection in a matter of weeks after revived merger talks with Frontier Airlines fell through.

Spirit Airlines is preparing to file for bankruptcy protection, according to a report by the Wall Street Journal. The move comes after merger talks with Frontier Airlines broke down, leading the budget airline to seek other alternatives as it deals with mounting losses and a tumble in the stock market.

KEY TAKEWAYS Spirit Airlines shares are plunging more than 60% in premarket trading on a report that the budget carrier is getting ready to file for bankruptcy protection after revived merger talks with Frontier Airlines parent Frontier Group Holdings collapsed.