An Allegiant Air plane lands at Harry Reid International Airport on July 26, 2022, in Las Vegas. Chase Stevens | Las Vegas Review-Journal | Tribune News Service | Getty Images Allegiant Travel Co .'s acquisition of Sun Country Airlines closed on Wednesday, and the chief executive of the combined company, Greg Anderson, said Allegiant Air will continue to stand out despite industry turmoil, including a surge in jet fuel costs. "Our model was built to protect margins and not chase growth," Anderson said in an interview with CNBC. The Las Vegas-based airline announced its $1.5 billion cash and stock agreement, including debt, to buy Minneapolis-based Sun Country in January. The brands and booking portals will remain separate, for now. The combined carrier, which Allegiant said will serve about 175 cities with over 650 routes, will continue to be surgical about capacity growth, Anderson said. He said that strategy has insulated the airlines from some of the trouble that other low-cost airlines have faced.…