“The C.D.C.’s new travel guidance is a major step in the right direction that is supported by the science and will take the brakes off the industry that has been hardest hit by the fallout of Covid by far,” Roger Dow, the chief executive of U.S. Travel, an industry group, said in a statement. “As travel comes back, U.S. jobs come back.”…

Many airlines have added flights to the beach and mountain destinations that have been popular throughout the pandemic. This week, Delta Air Lines also said it would start selling middle seats again, United Airlines said it would resume pilot hiring after freezing it last year and Frontier Airlines launched an initial public offering.

“The time is now,” Barry Biffle, Frontier’s president and chief executive, said in an interview. “If you look, the vaccine is unlocking the demand, and you’re seeing it everywhere. You’re seeing it in restaurants, you’re seeing it in hotels.”