Spirit Airlines on Thursday rejected Frontier Airlines' latest proposal for a merger, which would have helped bring the Florida-based carrier out of bankruptcy to join forces with its top competitor.

JetBlue officially ended its merger process with Spirit early last year after the Department of Justice (DOJ) won the case against the merger in January 2024. This was also a big blow to Spirit, which has been dealing with financial troubles and was hoping for the merger to come through.

Spirit Airlines rejected Frontier Group's acquisition offer worth about $2.16 billion, marking the latest failed deal in the years since the companies began discussing a merger.