We had the choice of flying from EWR or JFK, same airline, same price, virtually the same time, so we chose Newark hopefully because it will be easier to get to than JFK - we want to return the car to the airport we fly from, and not have to mess around with public transport with our luggage. Looking at the maps, it looks like you have to drive right through NYC to get to JFK, so I'm just hoping that was the best decision traffic-wise, fingers crossed!