Neuss is a medium-sized city across the Rhine river from Düsseldorf in the North Rhine-Westphalia region of Germany. Get in . Düsseldorf International Airport (DUS IATA) is just 15 kilometers from Neuss downtown. There is a direct S-Bahn connection from the airport terminal to Neuss main station every 20 minutes, taking half an hour. Neuss is not served by intercity trains.