Let KAYAK do the searching
Based on KAYAK hotel searches, the most popular destination is Cologne (64% of total searches to North Rhine-Westphalia). The next most popular destinations are Düsseldorf (22%) and Dortmund (10%). Searches for hotels in Bonn (4%) are also popular.
KAYAK users have found double rooms in North Rhine-Westphalia for as cheap as £13 (Aachen) in the last 3 days. The average price is £110.