Frankfurt Airport, German: Flughafen Frankfurt Main [ˈfluːkhaːfn̩ ˈfʁaŋkfʊʁt ˈmaɪn] (IATA: FRA, ICAO: EDDF), 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 (5,683 acres) 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 Airport is the busiest airport by passenger traffic in Germany as well as the 6th busiest in Europe after Istanbul Airport, London–Heathrow, Paris–Charles de Gaulle, Amsterdam Airport Schiphol and Adolfo Suárez Madrid–Barajas Airport. The airport is also the 13th busiest worldwide by total number of passengers in 2016, with 60.786 million passengers using the airport in 2016. In 2017, Frankfurt Airport handled 64.5 million passengers and nearly 70 million in 2018. It also had a freight throughput of 2.076 million metric tonnes in 2015 and is the busiest airport in Europe by cargo traffic. As of 2022, Frankfurt Airport serves 330 destinations in 5 continents, making it the airport with the most direct routes in the world.

The southern side of the airport ground was home to the Rhein-Main Air Base, which was a major air base for the United States from 1947 until 2005, when the air base was closed and the property was acquired by Fraport (now occupied by Terminal 3).