You are allowed to fly with drones in Denmark under the following rules:

The drone’s weight must be no more than 25 kg and the drone must not be flown higher than 100 meters. The drone must always be fully visible to the person flying and all features must be fully mastered and under their control.

The following distances must be kept from these sites:

• Military air base: 8 km
   
• Other airports: 5 km
   
• Buildings and private property: 150 m
   
• Streets/roads: 150 m
   
• Sites of accidents: 200 m

You are only allowed to fly your drone in urban areas for professional purposes.

You can find more information here.