gundrukbhaat Copenhagen is one of the very expensive city in the world, It comes in the top ten list. It also depends on where you are coming from I guess. But don’t let me scare you. Lyngby is also a small city about 25 km away from Copenhagen, but train runs every 5 minutes and takes about 15 to 20 minutes to reach the town. I stayed in Copenhagen and studied in lyngby for 2 years and then after worked there for about half a year, so I know lyngby very well.