Airports 501 to 550
Round Lake Airport and Seaplane Base
Lufker Airport
Laurence G Hanscom Field
St John's Episcopal Hospital Heliport
Norwood Memorial Airport
Nashua Airport / Boire Field
Newport State Airport
Schenectady County Airport
Seacoast Helicopters West Heliport
Mont Vernon, New Hampshire, United States — 134 km (72 nm) NE
Southern Nh Medical Center Heliport
Block Island State Airport
Block Island, Rhode Island, United States — 135 km (73 nm) SE