Airports 3,751 to 3,800
Baltimore/Washington International Thurgood Marshall Airport
John C. Munro Hamilton International Airport
Baltimore Washington Medical Center Heliport
Waterville Robert Lafleur Airport
Haysfield Airport
Frederick Municipal Airport
Howard County General Hospital Heliport
Lac William ice runway (seasonal)
Frederick Memorial Hospital Heliport
Allegheny Power Hagerstown Corp Center Heliport