Sadly, there isn’t. Getting between Brooklyn and any airport in the New York area is a gigantic pain in the neck. You can take the 4/5/6 to the Q to get from Grand Central to Ditmas Park, but it’s about 40 minutes on the subway.Hmm, is there convenient transit between there and the airports? Because I might be able to stop by on my way to Grand Central to catch a train up to work every few months...