If you're flying with United Airlines through Phoenix Sky Harbor International Airport, you might be asking, What terminal is United Airlines at PHX? The answer is that United Airlines operates out of Terminal 3 at PHX. This is where you'll check in, go through security, and board your flight. Knowing What terminal is United Airlines at PHX will help you navigate the airport more easi... https://airlineofficedetails.com/united-airlines-phoenix-sky-harbor-airport/