The S-train network is basically a suburban rail network. It connects the city center with the suburbs of Copenhagen, and has close to half of the stations within the urban city. The first line was opened in 1934. Today the network forms the heart of the public transportation infrastructure in the city, serving around 360,000 passengers a day. It is entirely owned and run by DSB S-tog A?S. We found it an extremely efficient system and were impressed by the size, cleanliness and comfort of the trains.
The system is complemented by the Copenhagen Metro and an extensive bus network. Although owned by different companies, the systems use interchangeable tickets. There is around 170 km of dual track and 85 S-train stations. At most of the end stations other types of trains are at hand for travel to the most remote areas of greater Copenhagen - or for travel across the Oresund to Malmo, Sweden.
In the city center, the trains run below ground level with one underground station. Outside the inner city it runs in the open, often on embankments. The S-train rail network consists of a central section that splits into three radial lines at each end, as the lines reach the outer regions of Copenhagen. The S-trains run on standard gauge railway tracks and are powered by overhead wires. The trains are 8-car articulated units.
The red S-trains will take you to, from and around Copenhagen and most of North Sealand from approximately 05:00 - 00:30 during weekdays. The trains begin to operate a little later in the morning during weekends. On Friday and Saturday the trains run once an hour during the night. In the city centre they run once every half hour. Every first Sunday of the month in 2010 you can ride the S-trains for free.
All public transport in Copenhagen, as well as the rest of the country, operates on a zone system. The smallest ticket is the two-zone ticket which costs 23 Kr for adults (11.50 Kr for children under the age of sixteen), and can be purchased from ticket offices, vending machines and bus drivers. Two children under the age of eleven can travel for free with one paying adult. It allows you to travel around Copenhagen in two zones (the zone where you stamped or purchased the ticket plus one adjacent zone) for one hour. You can switch freely between all trains, Metro, and buses within this hour, as long as your last trip starts before the time is up (your ticket will be time-stamped in fifteen minute intervals).
A three-zone ticket from the airport to the central city costs 34.5 Kr. The two big railway hubs are Central Station (Hovedbanegården/København H) with S-trains, intercity trains and buses, and Nørreport Station with S-trains, metro, regional trains and buses.