[Jensson]

Zurich Airport was much better for me, a few minutes to Zurich by train and they go every few minutes and tickets are cheap since those are the commuter trains. No need to plan, just go to the train station and hop on the first train and you are there in less than 10 minutes.

It really blew my mind when I first visited, I never thought getting to a major international airport could be that convenient. Swiss transit is so well designed.

[Symbiote]

Copenhagen is as good if not better than both, at least accounting for the population being double that of Zurich.

Metro and commuter trains run all day and all night (the trains also go to Malmø in Sweden).

Long distance trains go all the way across Denmark and as far as Gothenburg in Sweden, although there are very few been midnight at 4am.