Airports 501 to 550
Altoona Blair County Airport
Morgan State University - Pearl Heliport
St. Mary's County Regional Airport
Green Bank Observatory Airport
Green Bank, West Virginia, United States — 154 km (83 nm) WSW
Bermudian Valley Airpark
Washington Township, Pennsylvania, United States — 156 km (84 nm) NE
Tappahannock Municipal Airport
Seven Springs Airport
Seven Springs Borough, Pennsylvania, United States — 157 km (84 nm) NW
Bay Bridge Airport
Shreveport North Airport
Nason Medical Center LLC Heliport
Roaring Spring, Pennsylvania, United States — 159 km (85 nm) N