Travelers at the Southwest Airlines Terminal at Phoenix enjoy a quick and straightforward check-in and boarding process. Southwest Airlines, located in Terminal 4 of Phoenix Sky Harbor International Airport, offers various self-service kiosks, curbside check-in, and staffed counters for quick baggage drop-off. EarlyBird Check-In and mobile boarding permits provide customers more flexibility on the fly. Southwest's open seating policy simplifies boarding, with boarding groups organized for efficiency. Clear signage, helpful staff, and simplified security procedures all help to provide an enjoyable experience. Southwest Airlines at PHX makes boarding easy, whether you check in online or at the airport.