Large airports have dedicated pipelines from refineries to tank farms. O'Hare in particular is serviced by Kinder Morgan. The reserve tanks are mostly just there for interruptions and high demand, the pipeline is engineered to handle standard demand.

Source: I'm IT Proj Mnger for building the $bil+ LNG plants.

Large airports have dedicated pipelines from refineries to tank farms. Source: I'm IT Proj Mnger for building the $bil+ plants.