Roberts International Airport , informally known as Robertsfield, is an airport in the West African nation of Liberia. Located near the town of Harbel, the single runway airport is about 35 miles outside of the nation's capital of Monrovia, and as an origin and destination point is referred to as "Monrovia" in popular usage.The airport is named in honor of Joseph Jenkins Roberts, the first President of Liberia.Airport Monrovia Roberts International is used by low cost airlines for domestic, international and transcontinental flights. Only Brussels Airlines offers low cost flights to this airport.