The most interesting thing that Dusseldorf International Airport offers is robot valet parking. The valet, nicknamed Ray will park your car when you reach Dusseldorf airport. DUS, Dusseldorf airport has 8400-panel solar array, a solar power plant generating almost two megawatts of energy per year and large monitors displaying the amount of energy the panels are generating and the carbon emission they are preventing. Airlines from many European countries use Dusseldorf International Airport. Here are some companies; Air Baltic, Air Malta, Condor, Austrian Airlines, Air Serbia, British Airways, Aegean Airlines, Aeroflot, Corendon, Easyjet, Croatia Airlines, Egypt Air, Eurowings, Finnair, Iberia, KLM, LOT, S7, SAS, Vueling, Lauda. Dusseldorf airport is in a location that you can easily reach by public transport. With The SkyTrain, you can reach the airport terminal building within minutes from the main train station. After the traveller confirms on the touchscreen that no one is in the car, the robot measures the vehicle, picks it up with a forklift-like system and takes it to the back area to park it. Connected with flight data system, the robot valet knows when the customer will return, however, the customer can mark itinerary changes in the parking app.