From Copenhagen Airport
From Copenhagen Airport Terminal 3 there is a direct train to the city center on track 2. Get off at Copenhagen Central Station and walk to the Congress Center, which is within 8-10 minutes walking distance.
You can also get a train on tracks 11 and 12 at Central Station that will take you to Dybbølsbro Station. Tickets from the airport to Copenhagen Central Station are also valid on the bus, metro and S-train.
Taking a taxi from the airport will cost approx. DKK 280. All taxis are metered and accept all major international credit cards.
Find out more about Copenhagen Airport on their webpage:
https://www.cph.dk/en/
From the Central Station
You can either walk from the Central Station, the Congress Center, is within 8-10 minutes walking distance.
You can also get a train on tracks 11 and 12 at Central Station that will take you to Dybbølsbro Station, which is just behind the Congress Center.