People who are fully vaccinated with an FDA-authorized vaccine or a vaccine authorized for emergency use by the World Health Organization can travel safely within the United States.
CDC will update these recommendations as more people are vaccinated, as rates of COVID-19 change, and as additional scientific evidence becomes available. This guidance applies to travel within the United States and U.S. territories.
https://www.cdc.gov/coronavirus/2019-ncov/travelers/travel-during-covid19.html