The Keikyu Line operates on five rail lines: the main Keikyu Line, the Airport Line, the Daishi Line, the Zushi Line, and the Kurihama Line. The Keikyu Line connects downtown Tokyo (Shinagawa Station) with the Miura Peninsula via Haneda Airport and Yokohama.

The Keikyu Line allows direct access between Haneda Airport, Yokohama, and downtown Tokyo with no need to change trains. Both business travelers and tourists find this line extremely convenient to use. Plans are in place to open an International Terminal Station (proposed name) in 2010, which will directly connect the other stations with the New International Terminal at Haneda Airport.