Take the D, F, N, or Q train to Coney Island–Stillwell Av (terminal station). Exit and follow signs to the boardwalk/amusement area.
Take the Belt Parkway to Exit 14A (Coney Island). Follow signs. Parking is limited and expensive in summer; consider outer lots + walk/transit.
The Ocean Parkway bike path connects directly from Prospect Park (~5 mi). Pedestrian access via Riegelmann Boardwalk from Brighton Beach/Sea Gate.