[Photo from visitcopenhagen.com]
The public transportation in Copenhagen is very reliable, punctual, and it takes you everywhere. In Copenhagen the trains, Metro and busses (including waterbuses) can be accessed with the same ticket. All you need to know is how many zones you will pass on your journey. Note the Metro will take you from the airport to central Copenhagen in only 20 minutes.
Buses
The A-buses are the primary buses in central Copenhagen. They drive every 3-7 minutes during rush hour (which is between 07:00-09:00 in the morning and 15:30-17:30 in the afternoon) and usually about every 10 minutes before and after rush hour. The A-buses serve at all hours.
The S-buses drive every 5-10 minutes during rush hour and every 20 minutes outside of rush hour. The S-buses are faster than the A-busses due to fewer stops. They usually serve between 06:00 in the morning and 01:00 at night.
Night buses are in service between 01:00 and 05:00 in the night. You can recognise the bus stops by the grey colour of the bus stop signs. The night buses are all N buses, for an example 85N.
Metro
The metro is in service all day and all night, every day of the week.
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).
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.
Trains
The S-trains run between 05:00 in the morning and 00:30 at night. Line F runs every 4-5 minutes, line A, B, C and E run every 10 minutes, and line H and Bx run every 20 minutes.
On Friday and Saturday the trains run once an hour between 01:00 and 05:00. However, line F runs every half an hour during these hours.