[1] When it last ran, the line operated every 70 minutes five days a week along the Baltimore–Washington Parkway between these two locations with no intermediate stops, with the exception of the BWI Business District Light Rail Stop and Arundel Mills Mall,[2] and the last bus leaving BWI at 10:09 pm.

Service operates every 70 minutes between Greenbelt station and Baltimore-Washington International Thurgood Marshall Airport on weekdays only.

The original $3 one-way fare was seen as a bargain compared with other transportation modes in the area, including Greyhound and MARC Train Service.

[4] WMATA also provides higher levels of service on the line in special times of need, especially on certain holidays.

[6][7] On June 25, 2017, weekend service for the B30 was discontinued and the one-way fare for the route was increased to $7.50 making the B30 bus a more expensive option than the MARC train.