There currently are a variety of options to travel by night train from Augsburg to Linz, taking between approximately 4 and 6 hours: Namely the EN 50237, and the IC 461. These lines are operated by ÖBB, and DB.
The Austrian Federal Railways (ÖBB) operate the Nightjet and Euronight trains (the latter together with other national railway agencies). The ÖBB usually offer three types of carriages in their night trains: seats, couchettes, and sleepers. While seats are only for the bravest, couchettes and sleepers offer a more comfortable journey. Couchettes can hold up to six people, whereas sleepers are private compartments for one to three people. They may include a private bathroom or shower, or sometimes just a sink.
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. In these night trains, there are only first and second class seats. The lights stay on all the time and there is no way to recline the seats.
For the next 7 dates with connections, the cheapest offer starts at 49 EUR. Check our connection pages below for all availabilities!