Øresundståg is a passenger train network operated by DSB Øresund and Transdev in the transnational Øresund Region of Denmark and Sweden. The name is a hybrid of the Danish Øresundstog and the Swedish Öresundståg, both meaning "Øresund train". The rolling stock, also known as Class ET in Denmark and X31K or X32K in Sweden, are electric passenger trainsets in the Flexliner family. The maximum speed is 180 km/h.
Trains run at 20-minute intervals (hourly during the night) between Helsingør and Copenhagen in Denmark and Malmö and Lund in southern Sweden over the Coast Line and the Øresund Line, through the City Tunnel, and also on a small part of the Southern Main Line. From Lund most Øresundståg services continue to either Gothenburg, Kalmar, or Karlskrona, using the West Coast Line, the Southern Main Line, the Coast-to-Coast Line or the Blekinge Coast Line. This schedule is augmented by a weekday service between Nivå and Copenhagen Airport, Kastrup with some rush-hour services continuing across the Øresund to Malmö and Lund, effectively giving a 10-minute frequency on the route between Lund and Copenhagen Central Station and even more frequent service between Helsingør and Copenhagen. The network thus covers route 854 kilometres (531 mi) of railway.
The trains are operated by DSB Øresund in Denmark and Transdev in Sweden. Trains operated by DSB on the inter-city line to Ystad also run over the network, where they connect to the high-speed ferry to Bornholm. This connection (train + ferry) is considered to be a DSB inter-city service for ticketing purposes. The travel time to Bornholm has been cut in half (3 hours, as against 6 hours previously) since opening of the Øresund Bridge and the introduction of a high-speed ferry, making the combined service more competitive with air travel (35 minutes' flying-time plus 30 minutes' check-in time).