There currently are a variety of options to travel by night train from Hamburg (Germany) to Copenhagen (Denmark), taking between approximately 6 and 8 hours: Namely the 300, the RJ 386, the EN 344 and the 10300. These lines are operated by Snälltåget, DB and SJ.
Snälltåget offers night travel with various comfort levels on night trains between European cities.
Accommodation ranges from individual seats in coaches to shared compartments with up to six berths and private compartments for small groups. All beds include bedding and blankets.
In shared and private compartments, seats convert to berths at night. Each compartment features three berths on each side with ladders to reach the upper berths. Private compartments are ideal for groups seeking more privacy.
Animals are permitted in private compartments only. Bikes are not allowed, but collapsible bicycles can be transported as hand luggage or stored on luggage racks.
Deutsche Bahn (DB) exited the actual night train business in 2016. However, it operates around a dozen Intercity and Eurocity trains that run exclusively at night.
These trains only have first and second class seats. The cars remain lit throughout the night and the seats cannot be reclined.
The Swedish Railway SJ operates night trains daily throughout Sweden, covering long distances and serving remote areas.
The night trains include seating cars, couchettes, and sleepers. The sleeper cars provide compartments for two or three people as well as single compartments. Some routes also offer Deluxe compartments with private bathroom facilities and shower.
All sleeper compartments at SJ are equipped with a washbasin. The Deluxe compartments additionally offer a private bathroom with shower.
Couchette compartments accommodate up to six people. Bedding is provided including pillow, pillowcase, sheets and blanket. During the day, middle berths are folded up so lower berths can be used as sofas. You can choose between women-only, men-only, or mixed compartments. SJ offers limited couchette compartments where pets are allowed, and these must be booked as private compartments.