Denmark in September is hard to beat. The summer crowds clear out, the design museums are quiet, and you can spend your afternoons walking the canals or grabbing a coffee in Nyhavn without waiting in line.
A trip like this usually runs about $4000 for flights and the rest. Spreading that cost out takes a bit of planning, and using the right timeline makes all the difference.
That 0% intro APR is a deadline, not free money. If you still have a balance left when the 15 months are up, interest kicks in on whatever is left over.