Flight
NYC has tons of airports, but LGA will be the closest to Brooklyn and will have the most domestic flight options. LGA would also be easiest for those planning on driving/renting cars. JFK will be the easiest to access public transportation from via the AirTrain which you can take from directly inside the airport. EWR will like offer some cheaper flights depending on where you're coming from, but it will definitely require car transportation to get into Brooklyn afterwards!