Pan Am was founded in 1926. Its first flights were from Key West, Florida to Havana, Cuba. During the 1920s and 1930s, Pan Am bought several smaller airlines in Central America and South America. These were bought to help Pan Am expand its flights throughout The Americas. Pan Am became the first airline to circumnavigate the world in 1942. By the 1950s, Pan Am had several larger airplanes like the Boeing 377, Douglas DC-6 and the Lockheed Constellation. It went to cities all across the world. In 1959, Pan Am bought its first jet - the Boeing 707. In 1970, Pan Am introduced its first widebody jet - the Boeing 747.