Erenhot Saiwusu International Airport — Erenhot, China

ERL identifies Erenhot Saiwusu International Airport, serving the border city of Erenhot in China's Inner Mongolia Autonomous Region, situated directly on the frontier with Mongolia. The airport supports cross-border trade and transit activity tied to Erenhot's role as a major overland customs and logistics point between China and Mongolia, including rail freight transfers. ERL offers domestic flight connections to other Chinese cities, serving businesspeople, customs officials, and travelers involved in the region's minerals and coal trade. The surrounding area is known for dinosaur fossil discoveries in the Gobi Desert, adding a niche tourism dimension to an airport otherwise defined primarily by its strategic border-trade function.