No, there is no subway connection between LaGuardia and JFK, but there is a private bus service that you can take that connect the two airports. As I recall, it costs about $10-15 one way.
875 miles
The distance between Great Barrington, Massachusetts, and La Guardia Airport, New York, is 119 miles (192 km). This is approximately a drive of 2 hours and 30 minutes.
The driving distance between Kennedy and Boston, MA is 217 miles.
There was no connection between Ruby who was a nightclub operator and Kennedy.
146 miles John F. Kennedy International Airport (JFK) to Albany International Airport (ALB)
48 miles
The driving distance between JFK and Philadelphia International is about 121 road miles using I-95 south.
The flight time from John F. Kennedy International Airport to Grand Bahama International Airport is about 2 hours.
The driving distance from John F. Kennedy International Airport to Syracuse, New York is 270 miles.
The air distance from Venezia Tessera Airport (VCE) in Venice, Italy, to John F. Kennedy International Airport (JFK) in New York is 4,143 miles. That equals 6,668 kilometers or 3,600 nautical miles.
The flight distance from Raleigh-Durham International Airport to John F. Kennedy International Airport is 427 miles. The driving distance is 516 miles.
The Red Dot Airport Shuttle Service offers transportation services for travelers between LaGuardia Airport and John F. Kennedy Airport. They also offer shuttle transportation services to forty other locations.