Abstract: A pre-order system allows a passenger to pre-order products from a dynamically generated product catalog based on real-time supply inventories at the departure location of the passenger's vehicle and to have those selected products be delivered to the passenger while the vehicle is in-transit. At the request of a passenger, the pre-order system determines, using the passenger's itinerary and other data of the passenger, the physical product supply inventories available at the departure location in real-time and available to be loaded onto the vehicle on which the passenger will depart. In response to a passenger selection, the pre-order system automatically generates a vehicle service order, a packing inventory list, and a loading plan for the passengers vehicle that are all used to ensure the pre-order products may be delivered to the passenger while in-transit.