what terminal is frontier airlines at phl ?

Frontier Airlines operates out of Terminal E at Philadelphia International Airport (PHL). Passengers can check in at the designated counters or use self-service kiosks in Terminal E. After passing through security, travelers will find various dining options, retail stores, free Wi-Fi, and charging stations. Although Frontier does not have its own lounge, the terminal provides comfortable seating, family restrooms, and pet relief areas.