From most locations, the cheapest flights to Düsseldorf can be found during the month of February; however great deals can be found at other times.
From most locations, booking your flights to Düsseldorf around 60 days prior to your departure date finds the best deals.
In general, booking your departure to Düsseldorf for a Wednesday represents the best deal on airfare. Try to avoid a Sunday departure to stay away from the highest prices.
Generally, when visiting Düsseldorf, morning flights represent the best value. midday flights are likely to have higher prices.