Transportation in Washington, D.C. 30 minutes south of the city in Lorton, Virginia. Connections to the Washington Metro are offered at in Washington, station in Prince George's County, in Montgomery County, and , adjacent to Alexandria Union Station. Metrorail's Yellow and Blue Lines serve Ronald Reagan Washington National Airport. Express bus service from and is provided to Washington Dulles International Airport. Baltimore-Washington International Airport is served by express bus from and by rail from Union Station by MARC and Amtrak. There is also a planned station for Washington Dulles International Airport on the Metrorail Silver Line. DC Circulator is a downtown circulator bus system
London City Airport Authority. London City Airport has a single long runway, and a CAA Public Use Aerodrome Licence (Number P728) that allows flights for the public transport of passengers or for flight training (but only for training necessary for the operation of aircraft at the airport). Only multi-engine, fixed-wing aircraft with special aircraft and aircrew certification to fly 5.5° approaches are allowed to conduct operations at London City Airport. The largest aircraft which can be used at the airport is the Airbus A220-100. London City served over 4.5 million passengers in 2017. It is the fifth-busiest airport in passengers and aircraft movements