Airports 501 to 550
Frederick Municipal Airport
Donegal Springs Airpark
Mount Joy/Marietta, Pennsylvania, United States — 115 km (62 nm) NNW
Sentara Northern Virginia Medical Center Heliport
New Jersey State Police Troop A Headquarters Heliport
Williamstown, New Jersey, United States — 117 km (63 nm) ENE
Henry C. Mustin Naval Air Facility
Philadelphia, Pennsylvania, United States — 117 km (63 nm) NE
Atlantic Refining & Marketing Corp Heliport
Philadelphia, Pennsylvania, United States — 117 km (63 nm) NE
Frederick Memorial Hospital Heliport
Washington Dulles International Airport
New Freedom Switching Station Heliport
Winslow Township, New Jersey, United States — 119 km (64 nm) NE
Fort Detrick Helipad Heliport
Fort Detrick(Frederick), Maryland, United States — 119 km (64 nm) WNW
Dahlgren Naval Surface Warfare Center Airport
Childrens Hospital Of Philadelphia Heliport
Philadelphia, Pennsylvania, United States — 120 km (65 nm) NE
Children's Hospital of Philadelphia Heliport
Philadelphia, Pennsylvania, United States — 120 km (65 nm) NE
Hospital of the University of Pennsylvania - East Heliport
Philadelphia, Pennsylvania, United States — 120 km (65 nm) NE
Hospital of the University of Pennsylvania Maloney Building Heliport
Philadelphia, Pennsylvania, United States — 120 km (65 nm) NE