Most travellers find the cheapest return flights to Copenhagen when choosing a flight departing in December.
On average, from most locations, when planning your trip to Copenhagen, try to book your flight in the region of 60 days in advance for the cheapest prices.
Most of our users find that booking their departure to Copenhagen on a Sunday is the cheapest. Conversely, departing on a Friday seems to be the most expensive.
On average you can find the best deals on plane tickets to Copenhagen when looking for flights with morning departure times.