Brazilian airline Azul (NYSE: AZUL) lost more money than expected in the last three months of 2022, but investors are more focused on an announcement that the airline has reworked its agreements with aircraft lessors. Shares of Azul climbed more than 50% on Monday morning, and shares of domestic rival Gol Linhas Aereas Inteligentes (NYSE: GOL) are up more than 20% on hope that conditions are improving in this major aviation market. Airline stocks have been hit by a lot of turbulence in recent years.