Dusseldorf International Airport, located in Dusseldorf, Germany, is the third-largest airport in Germany and the largest airport in the state of North Rhine-Westphalia. It has an airport code of DUS, and is sometimes referred to by the name “Rhein-Ruhr Airport”, in reference to the densely populated region of the same name.

The airport was first opened in 1927, when it was known as the Rhein Airport. It was named after the Rhine River, which runs through the area, and was used as a military airfield for the German Luftwaffe. In the years following World War II, the airport was used by the British Air Force and then by the U.S. Air Force. The airport was eventually returned to civilian aviation in 1947, and it was then renamed Düsseldorf International Airport.

The airport code, DUS, was derived from the German spelling of the city's name, Düsseldorf. The airport was expanded in the 1950s and 1960s, and it now covers an area of 2,500 hectares. It has two terminals and serves over 21 million passengers per year.

The airport is served by over 100 airlines, including major carriers such as Lufthansa, KLM, British Airways, and Air France. It has over 200,000 flights each year, with an average of 550 flights a day. It serves as a hub for Eurowings, SunExpress Deutschland, and TUIfly, and is a focus city for easyJet and Germanwings.

The airport has several facilities for passengers, including a business center, a VIP lounge, and a shopping mall. It also has a hotel and conference center, and a nearby train station that provides direct access to the city center.

Dusseldorf International Airport is an important aviation hub in Germany and the surrounding region, and it is well-connected to major cities around the world. Its airport code, DUS, is derived from the German spelling of the city's name, and the airport itself is sometimes referred to by the name “Rhein-Ruhr Airport”, in reference to the densely populated region of the same name. It has over 200,000 flights each year, with an average of 550 flights a day, and serves as a hub for a number of major airlines.