While Qantas CEO Alan Joyce was the first to voice a plan to permit only passengers who have been vaccinated to fly internationally, U.S. airlines are considering a vaccination requirement as well.
They want to figure out whether this will give customers confidence to travel, and whether requirements can be made uniform across airlines so they don’t have to compete for customers with vaccine policies. A vaccine requirement though will be unnecessary by the time the vaccine is available enough for this to become possible.