Originally Posted by puchong

Many European railways (e.g. Deutsche Bahn, OeBB etc) offer reduced price one-way trips within Europe (called "Eurospar" tarif in the Germanic world).

Do the Danish railways offer something similar? If yes, where can I find the details or make a booking? A URL would be very helpful.

Alternatively, what is the cheapest way to travel from Kastrup (Copenhagen airport) to either Kiel or Hamburg in Germany?