Elevated jet fuel prices remain the dominant pressure on airline margins in 2026, amplifying losses for carriers with thin balance sheets and high fixed costs. U.S. passenger airlines recorded a $966 million after-tax net loss in Q1 2026, with Spirit Airlines completing its second Chapter 11 filing and liquidating operations in May after failing to restructure amid fuel spikes that invalidated exit assumptions. JetBlue has been cited as particularly exposed due to ongoing losses exceeding $1 billion annually. In contrast, legacy carriers such as American Airlines have reduced total debt to $34.7 billion—its lowest level since mid-2015—while reporting record quarterly revenues. Trader sentiment for additional bankruptcy filings by year-end centers on whether sustained high fuel costs and soft leisure demand will overwhelm smaller or ultra-low-cost operators before Q3 and Q4 earnings provide clearer signals.