Frankfurt am Main is the German city that hosts the country's largest and busiest airport, known as Frankfurt Airport (FRA). Operated by Fraport, it serves as the primary global hub for Lufthansa and is one of the most significant aviation gateways in the world. In terms of physical size, it covers approximately 23 square kilometers and features two massive main terminals, with a third terminal currently under expansion to handle increasing passenger volumes. Frankfurt consistently ranks as the largest airport in Germany by passenger traffic, cargo tonnage, and the number of direct international connections. While Munich Airport (MUC) is the second-largest and often praised for its high-quality passenger experience, it does not match the sheer scale or historical volume of Frankfurt. FRA is unique for its "Intercity Express" (ICE) railway station integrated directly into the terminal, allowing passengers to transition from long-haul flights to high-speed trains reaching speeds of 300 km/h across Europe. For travelers, its size means you should allow significant time for transfers, as navigating between the far ends of Terminal 1 and Terminal 2 can take 20 to 30 minutes.