The vast majority of oil in the world is used for transportation. Airports traffic can be a good major of the health of the global economy and also oil demand. Plane fuel can only be obtained form oil as off today.
Here are lists of the world largest airports. They are lagging behind one year usually.
World largest airport by passenger traffic.
The biggest airports worldwide by passengers
As far as individual airports, the data is not as easily available particularly for the international airports.
Not much data available about Beijing's airport.
Hartsfield Jackson Atlanta International Airport
TBC….
But the 2 big airports so far showing a growth pattern. That means one or all of the following. There is a growth in air traffic globally, these airports are taking passenger share for others, the economic of flying is becoming more affordable. Only the first means the deman of oil will increase from the aviation industry.
An article regarding Beijing airport
https://centreforaviation.com/analysis/reports/beijing-capital-airport-2017-record-but-stays-2-to-world-busiest-atlanta-as-beijing-daxing-looms-398862