I'm new here - I'm connecting from JAX in a few weeks at JFK on Delta. My inbound flight appears to be arriving at a gate around A21, which seems to be on a lower level of Terminal 4. My outbound flight to Prague will leave somewhere around gate B22 or so. From the maps, I don't see a direct way to get from those lower gates to the rest of the terminal. Is there an easy way to do that without leaving the secure area? Thanks!