First terminal (1952–1992)

Construction

Until the beginning of World War II, Moon Township was mostly a rural agricultural area. It was not considered a suburb of downtown Pittsburgh as it was too distant. It was served solely by Pittsburgh-based state and federal services and media. In the early 1920s, John A. Bell of Carnegie purchased a number of small farms in Moon and established a commercial dairy farm on his 1,900 acres (8 km2) of land. He was bought out by Edward E. Rieck and his wife, and C.F. Nettrour, owners of the established Rieck's Dairy. They doubled the number of cattle at the farm.

Around 1940, the federal government, through the Works Progress Administration (WPA), determined that the Pittsburgh area needed a military airport to defend the industrial wealth of the area and to provide a training base and stop-over facility. The administration of President Franklin D. Roosevelt was continuing to invest in infrastructure across the country in the waning years of the Great Depression, before the US entered World War II, which had started in 1939. The agricultural expanses of Moon Township were attractive to airport planners in the city. The Civil Aeronautics Administration proposed $2.6 million to the county for a $6 million field in August 1941 ($56.9 million and $131 million present day dollars). The county bought the Bell Farm, and federal agencies began construction of the runways on April 20, 1942, after the US had entered the war.

In 1944, Allegheny County officials proposed to expand the military airport with the addition of a commercial passenger terminal to relieve the Allegheny County Airport, which was built in 1926 and was becoming too small. Ground was broken on the new passenger terminal on July 18, 1946. The new terminal would eventually cost $33 million ($400 million present day dollars) and was built entirely by Pittsburgh-area companies. The new airport, christened as Greater Pittsburgh Airport opened on May 31, 1952. The first flight was on June 3, 1952. In its first full year of operation in 1953, more than 1.4 million passengers used the terminal. "Greater Pitt" was then considered modern and spacious. The airport terminal was the largest in the United States, second only to Idlewild Airport's (now JFK Airport) in New York when it was completed five years later. The airport's capacity is one of its most valuable assets.

The airport was designed by local architect Joseph W. Hoover. One of the features of his style is the use of simple, exposed concrete, steel, and glass materials. The terminal building was constructed in "stepped" levels: the first floor extended farther than the second, the second floor extended farther than the third, etc. Such a design meant that the uncovered roof of the lower level could be an observation deck. In addition to the observation decks, the rounded "Horizon Room" was on the fourth floor with a commanding view of the airport. The interior of the terminal building was in the contemporary International Style, as was the exterior. One of the memorable features of the lobby was the large compass laid in the floor with green and yellow-orange terrazzo. A mobile by Alexander Calder was another decorative feature of the lobby. The mobile hangs in the center core of the new airside terminal. A re-creation of the compass was installed in the new terminal at an exhibit dedicated to old "Greater Pitt".

Operations

The first five airlines of the Greater Pittsburgh Airport were Trans World Airlines (TWA), Capital Airlines (later part of United), Northwest, All American (later Allegheny Airlines, then USAir, and finally US Airways), and Eastern Airlines. The April 1957 Airline Guide shows 58 weekday departures on Capital, 54 TWA, 18 Allegheny, 8 United, 7 Eastern, 4 Northwest, 3 American and 2 Lake Central. The first jets in service at Pittsburgh were TWA 707s on a Los Angeles-Chicago-Pittsburgh loop in summer 1959.

The 1956 diagram shows runway 10/28 7500 ft, 5/23 5766 ft and 14/32 5965 ft. The longest runway was still 7500 ft when jets started in 1959 but was soon extended to 8000 ft. The 10500-ft runway 10L was added by 1965.

In 1959, the east dock was added to the terminal. On July 1, 1968, international airport status was obtained with the dedication of the first customs office at the complex. Ground was broken for the International Wing, west of the original terminal building, in 1970. It opened in 1972 to accommodate federal inspection services; international flights (Nordair 737s to Canada) began in 1971. The airport expanded as load increased. In 1972, rotundas were added to the end of each dock to allow more gates. In 1972, upon the opening of the international arrivals building, the airport was renamed Greater Pittsburgh International Airport. In the later 1970s growth in regional air travel created a need for more gates. In 1980 the South East Dock was opened. Even with these expansions, the terminal was too small.

From the 1960s to about 1985, TWA operated a small hub at Pittsburgh. The carrier introduced service to London's Gatwick Airport on a Lockheed L-1011 TriStar in 1981.