If you're flying with Frontier Airlines and wondering, "What Terminal is Frontier Airlines at PHL?" It's important to know the terminal location for a smooth travel experience. Terminal E at Philadelphia International Airport (PHL) is where Frontier Airlines operates. This terminal, designed for low-cost carriers, ensures efficient check-in, security, and boarding. For passengers flying with Frontier Airlines, heading to Terminal E at PHL will help make your journey as seamless as possible. Make sure to check your flight details for any updates before traveling.