Shares of airline companies took a broad beating Tuesday, as part of a selloff in the broader stock market, as fears spread that the omicron variant of COVID will negatively impact the travel industry. The U.S. Global Jets ETF /zigman2/quotes/207744796/composite JETS -2.68% sank 1.7% toward a one-year low in premarket trading. The sector tracker had tumbled 17.1% over the past three weeks through Monday. Among the more-active airline stocks in Tuesday's premarket, American Airlines Group Inc. /zigman2/quotes/209207041/composite AAL -1.79% shed 2.1%, Delta Air Lines Inc. /zigman2/quotes/200327741/composite DAL -2.25% dropped 2.2%, United Airlines Holdings Inc. /zigman2/quotes/205037281/composite UAL -3.05% slid 2.1%, JetBlue Airways Corp. /zigman2/quotes/207639051/composite JBLU -2.07% lost 1.8% and Southwest Airlines Co. /zigman2/quotes/201071949/composite LUV -0.60% gave up 1.5%. The selloff comes while futures /zigman2/quotes/209948968/delayed ES00 -1.47% for the S&P 500 /zigman2/quotes/210599714/realtime SPX -1.84% slumped 0.9%.