Frankfurt Airport, German: Flughafen Frankfurt Main, is Germany's main international airport by passenger numbers, located in Frankfurt, Germany's fifth-largest city. In the German Aeronautical Information Publication, its name is Frankfurt Main Airport. The airport is operated by Fraport and serves as the main hub for Lufthansa, including Lufthansa CityLine and Lufthansa Cargo as well as Condor and AeroLogic. It covers an area of 2,300 hectares of land and features two passenger terminals with capacity for approximately 65 million passengers per year; four runways; and extensive logistics and maintenance facilities.

Frankfurt am Main is the most populous city in the German state of Hesse. Its 773,068 inhabitants as of 2022 make it the fifth-most populous city in Germany, and it is the only city in the country rated as an "alpha world city" according to GaWC. Located in the foreland of the Taunus on its namesake Main, it forms a continuous conurbation with the neighbouring city of Offenbach am Main and its urban area has a population of over 2.3 million. The city is the heart of the larger Rhine-Main metropolitan region, which has a population of more than 5.8 million and is Germany's second-largest metropolitan region after the Rhine-Ruhr region and the fourth biggest metropolitan region by GDP in the European Union. Frankfurt is home to the European Central Bank, one of the institutional seats of the European Union, while Frankfurt's central business district lies about 90 km (56 mi) northwest of the geographic center of the EU at Gadheim in Lower Franconia. Like France and Franconia, the city is named after the Franks. Frankfurt is the largest city in the Rhenish Franconian dialect area.