At Phoenix Sky Harbor International Airport (PHX), Terminal 4 is the base of operations for Southwest Airlines. Southwest Airlines uses this facility for both arrivals and departures.

There are various ways for passengers flying with Southwest out of Phoenix to check in: online, using the mobile app, or in person at the check-in counters and self-service kiosks at Terminal 4. 24 hours before to the planned departure time, check-in is available (AirportTerminalGuides.com) (Airport City Terminals).

https://airportcityterminals.c....om/southwest-airline