If you're searching for what terminal is Frontier Airlines at Phoenix Sky Harbor, the answer is Terminal 3. Frontier Airlines operates all its flights in and out of Terminal 3 at Phoenix Sky Harbor International Airport (PHX), which is known for its streamlined layout and modern facilities. About Terminal 3 at PHX Terminal 3, often referred to as the “Modern Terminal,” underwent m... https://airofficedetails.com/frontier-airlines-terminals/frontier-airlines-phx-terminal/