Airline stocks enjoyed broad gains Friday, with the U.S. Global Jets ETF /zigman2/quotes/207744796/composite JETS -1.36% rallying to levels not seen since before COVID-19 was declared a pandemic, amid hopes that the recovery could be stronger than anticipated. The Jets ETF surged 2.9% in afternoon trading toward the highest close since Feb. 27. Among the more-active airline stocks, United Airlines Holdings Inc. /zigman2/quotes/205037281/composite UAL -1.52% jumped 6.6% to lead the group, and American Airlines Group Inc. /zigman2/quotes/209207041/composite AAL -2.07% was next with a 5.1% rally toward the highest close since June 8. Delta Air Lines Inc.'s stock /zigman2/quotes/200327741/composite DAL -1.75% rose 3.5%, and was headed for the highest close since March 4. The stocks of JetBlue Airways Corp. /zigman2/quotes/207639051/composite JBLU -0.99% hiked up 3.5% and Southwest Airlines Co. /zigman2/quotes/201071949/composite LUV -0.99% advanced 2.4%, with both headed for the highest closes since late February. The World Health Organization had declared COVID-19 a pandemic on March 11. Separately, shares of travel services software and technology company, which supports airline operations, soared 14.4% toward a one-year high, after Deutsche Bank analyst Ashish Sabadra turned bullish. Among reasons for his upgrade, "the pent-up demand for travel could potentially drive faster recovery than prior recessions." The Jets ETF has has run up 18.1% over the past three months while the S&P 500 /zigman2/quotes/210599714/realtime SPX -0.46% has gained 9.3%.