Roberts International Airport (IATA: ROB, ICAO: GLRB), informally also known as Robertsfield, is an international airport in the West African nation of Liberia. Located near the town of Harbel in Margibi County, the single runway airport is about 56 km outside of the nation's capital of Monrovia, and as an origin and destination point is referred to as "Monrovia" and locally is often referred to simply as "RIA." The airport is named in honor of Joseph Jenkins Roberts, the first President of Liberia. In 1942, Liberia signed a Defense Pact with the United States. This commenced a period of strategic road building and other construction related to US military interests in checking the expansion of the Axis powers. The airport was originally built by the U.S. government as an Air Force base as part of these activities. The story of Robertsfield is consistently intertwined with the history of Pan American World Airways. In fact, from the end of World War II until 1985, the airport was administered and operated by Pan American under contract with the Republic of Liberia's Ministry of Transport. Monrovia was consistently a key link in Pan American's African network, usually an intermediate stop between Accra and Dakar, from which service continued onward to Europe and New York.
Now the airport is the nation's busiest and most important aviation facility, currently hosting the country's only scheduled commercial airline services, with direct connections to several major cities in West Africa as well as flights to Europe on Air France and Brussels Airlines. The airport reportedly served 228,000 passengers annually in 2018 and recently underwent a major expansion, including the opening of a new passenger terminal.