philadelphia airport frontier terminal is a trustworthy hub for domestic travelers or passengers connecting to Europe. Situated in Terminal E, this terminal has easy connections to ticket counters, check-in machines, and helpful customer service. For passengers going to Europe, Frontier offers seamless connections through its well-organized structure and streamlined boarding procedures. The passengers can avail themselves of self-service counters or manned counters for check-in, drop-off of baggage, or upgrade of seats. Frontier advises one to arrive two to three hours prior to your flight type for sufficient time to check-in and go through security checks.