JFK and Newark When connecting within JFK or Newark , use AirTrain . AirTrain makes frequent stops around the airport including the airline terminals , parking lots, hotel shuttle areas and rental car facilities . Whats more, every AirTrain ride around the airport is free. Please check these links for more information: AirTrain JFK and AirTrain Newark . LaGuardia When connecting within LaGuardia , use the convenient shuttle bus service . Take the free Route A (all terminals ) or Route B (all terminals except Marine Air Terminal / Delta Shuttle ) courtesy buses to transfer between parking lots and terminals . Route A buses run every 10 to 15 minutes from 4:00 a m to 11:30 p.m. Route B buses run every 10 to 15 minutes from 6:00 a m to 2:00 a m Connecting to Other Airports There are numerous transportation options for connecting to and from other area airports . JFK to LaGuardia