The linen postcard shows the old Philadelphia Municipal Airport. Philadelphia Municipal became Philadelphia International in 1945, when American Overseas Airlines began flights to Europe. Philadelphia International Airport is the largest airport in the Delaware Valley region. As of 2008 it is the 10th busiest airport in the world in terms of aircraft activity.
Philadelphia International Airport has seven terminal buildings, which are divided into seven lettered concourses. Terminals A East and A West, B, C, and D are all interconnected. Terminal E can be reached from Concourse D through a pre-security bridge; however, Terminal F is completely separate.
Philadelphia International Airport Wikipedia Entry