Installation

In Blender open Edit, Preferences, Get Extensions, then use Install from Disk and pick the airport_terminal_generator zip.

Usage

1. Open the Airport tab in the 3D viewport sidebar (N). Pick a group (Terminals, Jet Bridges, Aircraft, Interior, Ground Vehicles, Airfield), click a design picture and press Add to place it at the 3D cursor. You can also use Shift+A, Mesh, Airport.
2. With an item selected, the top of the panel shows its design, size and face count. Surprise makes a new random design of the same kind, Vary changes the current one a little and Colors paints a new fictional livery and sign colors.
3. The sections below hold every setting of the item. For a terminal: Size, Look, Gates & Piers, Site and Jet Bridges. A jet bridge has Extension, Swing, Cab Height and Cab Angle sliders and an Animate Docking button that bakes a docking animation.
4. Carousels, moving walkways and escalators move by themselves when you play the timeline; set the speed in m/s.
5. Parts lists every object of the item with a visibility toggle. Convert to Mesh keeps the item as plain objects; Delete removes it with all its parts.

All sizes are in meters. A terminal's road side is -Y and its airside +Y. Airline and airport names are fictional; type your own.