If you're flying with Frontier Airlines from Philadelphia International Airport (PHL), you may be wondering, What terminal is Frontier Airlines at PHL? The answer is Terminal E. This is the designated terminal where all Frontier Airlines flights depart and arrive. Whether you're checking in, going through security, or boarding your flight, Terminal E at PHL is the place to be for all ... https://airlineofficedetails.com/frontier-airlines-philadelphia-airport-terminal-phil/