From the airport
From the airport, the metro runs directly from terminal 3 to Kongens Nytorv. Get off at Kongens Nytorv, then walk to Hotel Opera in around 2 minutes.
If you take a taxi from the airport, it will cost around DKK 250. All taxis run on a meter and accept dankort and most major international credit cards.
From the Oslo boat
Take bus no. 26 heading for Ålholm Plads. Get off at Kongens Nytorv and walk to the hotel in around 2 minutes.