Navigating the massive footprint of theDelta Airlines Atlanta Airport Terminal involves moving through an expansive matrix of parallel airfield buildings. Because the airline commands a massive fleet here, its aircraft park across every single concourse on the property, from Concourse T near the entrance out to Concourse F on the far eastern edge. To make these long distances manageable, travelers can jump onto the high-speed underground Plane Train, which arrives every two minutes to ferry passengers between gates.