35 - 60 minutes (1 transfer required)
$8
24/7 (every 10 minutes 4AM-8PM, every 15-20 minutes 8PM-4AM)
Each terminal has an AirTrain Station
35 - 90 minutes
$55 - $75 (possible flat rate)
24/7
Outside every terminal
Alternatively, a cheaper option ($17) is the JFK Airport Shuttle. It has free Wifi, and takes you directly to Grand Central in Mahnattan.
35 - 90 minutes
uberPOOL: $35
UberX $60-$80
UberXL $90-$120
UberBLACK $120-$150
24/7
Request for certain locations on the departure level