What terminal is United Airlines at PHX refers to the inquiry about the specific terminal at Phoenix Sky Harbor International Airport (PHX) where United Airlines operates. United Airlines primarily operates out of Terminal 3 at PHX, offering check-in counters, security checks, gates, and other passenger services. If you're flying with United Airlines, the What terminal is United Airli... https://airlineofficedetails.com/united-airlines-phoenix-sky-harbor-airport/