The cheapest way in. Nothing listed is quicker.
Øresund train to København H
Regional · Öresundståg (run by VR Sverige for Skånetrafiken), on a DOT ticketPickup, hours & luggage
Boards at. The railway station under Terminal 3 — read the screens for the track, and board a train for København H or Østerport, not one for Sweden
The same DOT three-zone single as the metro, kr. 30: valid on bus, train, light rail and metro, including the Øresund train between the airport and Østerport. Two children under 12 free with a ticketed adult.
Luggage. Intercity-style trains with racks and space by the doors.