Holingol Huolinhe Airport — Holingol, China

HUO is Holingol Huolinhe Airport, located in the coal-mining city of Holingol (Huolinguole) in Inner Mongolia, China. The airport primarily supports the region's substantial coal mining and power generation industry, ferrying workers, officials, and cargo-related personnel between Holingol and larger hubs like Hohhot or Beijing. The surrounding grasslands and open-pit coal mines define the local economy, and HUO's relatively modest passenger volumes reflect its role as an industrial support airport rather than a tourist destination. Flight frequency at HUO can be limited compared to larger Chinese regional airports, and service is closely tied to the fluctuating demands of the coal and energy sector in this part of Inner Mongolia.