There’s very little to worry, then, about vaccinated people getting sick or getting others sick. There’s very little to worry, then, about vaccinated people traveling.
Vaccinated people shouldn’t even need to wear masks, except that it’s difficult to tell who is vaccinated and who isn’t, and it’ll be difficult to manage compliance by the unvaccinated up in the air. That’s why the timetable for lifting air travel mask mandates should be when there’s enough vaccine available that everyone who wants a jab can get one.