All three metro lines are in service 24/7. There are 2-4 minutes between each train during rush hour, and 3-6 minutes outside rush hour and during the weekends. Friday and Saturday night (after 01:00) trains arrive with a 7-15 minutes interval and a 20 minutes interval after midnight on weekdays (Sunday through Thursday).
When using public transportation in Copenhagen, all members of the family must have a valid ticket. You can read more about the various ticket types and their prices here. There is ongoing ticket control, and both Copenhageners and tourists are responsible for having the correct tickets. If you and your family are travelling without a valid ticket or with an insufficient number of tickets, you can all be individually fined. If you find that you have wrongfully been given a fare evasion ticket, you can file an online complaint to Metro’s customer service. Sometimes, they are willing to cancel or reduce some or all fare evasion tickets issued to tourist families.
On 29 September 2019, 17 brand new stations were added to the metro. Known as line M3, “The City Circle Line (or “Cityringen” in Danish) the new line connects the neighbourhoods of Vesterbro, Frederiksberg, Nørrebro, Østerbro and the city centre.
Please note that maintenance of the rails may occur during the night, which can result in a slightly longer journey. The maintenance is between 01:00-01:25 and again between 04:15-04:45.