Booked myself a run in October leaving from Copenhagen.
As I've never been before, did want to see a bit of it during daylight hours although at that time of year, I assume it's the same as here and it gets dark 4-5pm or so.

Flight wise, I've a choice of:

08:55-11:50 for £125 ET
11:20-14:20 for £79 ET (possible CE upgrade for extra TP)

or a redemption on either for 4500 Avios + £17.50 (all flights available in ET)

Whilst the extra tier points would be helpful to renew gold (depending on a flight I'm taking in the US being in economy or first), I don't ideally want to pay £125 for what might be 4 hrs of daylight unless that is plenty of time to take in the major sights (well, the Little Mermaid status is all I know of)

Sure I've read it's pretty quick to get into the city. 15mins?

I'm staying at the airport Hilton which is only £200ish a night! (well, blew some Hilton points + £7 on it as that's a complete rip-off in my opinion)