There currently is one option to travel by night train from Linz (Austria) to Stuttgart (Germany), taking approximately 8 hours: Namely the EN 50462. These lines are operated by ÖBB and MÁV-Start.
The Austrian Federal Railways (ÖBB) operate the Nightjet and Euronight trains (the latter together with other national railway agencies).
ÖBB night trains typically feature four types of carriages: seats, couchettes, the compact Mini Cabin, and sleepers.
While seats are only for the bravest, couchettes, Mini Cabins, and sleepers offer a more comfortable journey. The couchettes usually feature simple and rather narrow berths, while the Mini Cabin provides a compact private space for one person. Two adjacent Mini Cabins can be combined for couples. Sleepers boast beds with duvets and pillows and sometimes even a private bathroom. Couchettes can hold up to six people. The Mini Cabin is a private space for one person – two adjacent Mini Cabins can be connected for traveling together. Sleepers are private compartments for one to three people.
Sleepers sometimes include a private bathroom or even a shower, sometimes only a sink. The Mini Cabin offers a more affordable private alternative with its own compact sleeping space for one person.
MÁV-Start, Hungary's national passenger railway, operates domestic and cross-border trains throughout the region.