Are you flying from Philadelphia with Frontier Airlines? Learn all there is to know about the Frontier Airlines Philadelphia Airport Terminal » . Frontier Airlines provides a convenient, reasonably priced travel experience, flying out of Terminal E of Philadelphia International Airport (PHL). A hassle-free start to your trip is guaranteed with Terminal E's food options, vital passenger services, and easy access to security checks. Navigating the Frontier terminal at PHL is easy and effective, regardless of whether you're traveling for business or pleasure. For a flawless journey with Frontier Airlines at Philadelphia Airport, stay up to date on terminal updates, gate information, and flight status.