Shuttle Services are an economical way to get to and from DC airports and train stations. To follow are a list of some of the most popular and convenient ground services. Also, always check with your hotel to see if they offer a free shuttle service to and from the airport. Many of them do and this can save you money.
Super Shuttle - Washington, DC is a cheaper alternative to taxiing into the District. The "Blue Van" as it is affectionately termed, is an airport shuttle that provides transportation to Reagan Washington National, Dulles and BWI airports. This is probably one of the more popular and reliable services.
The Airport Shuttle offers airport shuttle service from Maryland destinations to and from BWI, Washington Dulles and Reagan National Airports. And if you are arriving on the train, they also provide services for Amtrak and Penn-Station-Baltimore. Be sure to check-out their specials for discounts.
Go Airport Shuttle is a great economy option. Go Airport Shuttle serves BWI airport from Maryland, Washington, DC and Virginia. Additionally, they provide transportation to Dulles and Reagan Washington National Airports.
Airport Connection is another popular sedan, limo and taxi service that provides ground transportation to and from BWI, Reagan Washington National, and Dulles Airports.
Baltimore Economy Shuttle provides ground transportation to and from BWI, Reagan Washington National or Dulles Airports. And for those traveling via train, it also has services from Amtrak and Penn-Station.