<p dir="ltr" style="line-height: 1.38; margin-top: 0pt; margin-bottom: 0pt;">What Terminal is Southwest Airlines at PHX? Southwest Airlines operates exclusively from Terminal 4 at Phoenix Sky Harbor International Airport, the airport&rsquo;s largest and most traveler-friendly terminal. Terminal 4 offers a seamless travel experience with efficient check-in services, TSA PreCheck lanes, and organized boarding gates. Passengers flying with Southwest can enjoy numerous amenities, including free Wi-Fi, charging stations, a wide variety of restaurants, and retail shops. The terminal also provides easy access to baggage claim, rental cars, ride-shares, and public transportation. Whether you are departing or arriving, Southwest Airlines at PHX Terminal ensures a smooth, comfortable journey.