The cheapest flight to Copenhagen you can get by boooking 3 days before departure.
The most popular airlines on the route Dublin - Copenhagen: Ryanair (FR), SAS (SK), Finnair (AY).
The cheapest flights you can book on the route Dublin Airport (DUB) - Kastrup (CPH).
Direct flights last about 2h 10min.
Direct flights available 7 days a week.
Direct flights: Norwegian Air International (D8), Norwegian Air Shuttle (DY), Ryanair (FR).