As of 2015, BWI, the Baltimore-Washington International airport, has two main shuttle services: Bayrunner Shuttle and Supreme Airport Shuttle. The airport also runs courtesy shuttles for passengers disembarking to and from local hotels, and an off-airport parking shuttle for those who are riding to and from the airport in their own vehicles.
BWI's oldest shuttle service is the Bayrunner Shuttle. It serves the eastern and western shores of Maryland with daily scheduled van pickups. The two routes are designated Bayrunner Shuttle East and Bayrunner Shuttle West. Passengers can be dropped off at their airline, or in front of the airport's AmTrak station. The Bayrunner also offers an intercity shuttle from points along most of its route.
Supreme Airport Shuttle started running to BWI in 2012. The company's main service is shared shuttle service, where the cost of the ride is spread among the passengers in a given shuttle vehicle. They also offer exclusive van service for large numbers of people traveling as a group together. Normally, shared service is among strangers.
The airport's courtesy shuttles to hotels and off-airport parking shuttles are designed to keep traffic to and from the airport the low. For this reason, they are somewhat restricted. Passengers can only access these shuttles are specified zones. Zones 1, 3, and 4 are for hotel courtesy shuttles, while 2 and 4 are for parking shuttle services.