Airports 501 to 550
Groton New London Airport
Twin Manufacturing Company Heliport
South Windsor, Connecticut, United States — 141 km (76 nm) WSW
Bradley International Airport
Little Ossipee Lake Seaplane Base
Global Development Facility Heliport
Salmon River Airfield
Nantucket Cottage Hospital Helipad
Elizabeth Field
Fishers Island, New York, United States — 147 km (79 nm) SSW
South Glastonbury Heliport
South Glastonbury, Connecticut, United States — 147 km (79 nm) WSW