Pratt & Whitney-parent RTX Corp was not immediately available for comment. "We don't think a bankruptcy filing is a foregone conclusion albeit GTF compensation, how much work Spirit has done to address fixed costs to support a smaller operation, and the domestic environment are all important variables," Raymond James analyst Savanthi Syth said. Spirit also forecast fourth-quarter revenue at the top end of its initial guidance. Revenue is expected to be $1.32 billion, compared with analysts' estimates of $1.31 billion, according to LSEG data. The airline said the refinancing options it was assessing include $1.1 billion debt due in 2025. As of Dec. 31, 2023, Spirit had $1.3 billion of liquidity. (Reporting by Abhijith Ganapavaram in Bengaluru; Editing by Devika Syamnath)