Frontier Airlines operates out of Terminal E at frontier terminal phl for a streamlined travel experience, check in online via Frontier’s website or mobile app starting 24 hours before your flight. If you prefer, use the self-service kiosks located in Terminal E for check-in and boarding pass printing. Terminal E offers a range of dining and shopping options to enhance your wait. Remember that Frontier’s low-cost model includes additional fees for carry-on and checked baggage, so consider prepaying for these online. Follow TSA guidelines for security and monitor flight information displays for gate and boarding updates.