There currently is one option to travel by night train from Augsburg to Zagreb, taking approximately 13 hours: Namely the EN 40237 operated by ÖBB.
The Austrian Federal Railways (ÖBB) operate the Nightjet and Euronight trains (the latter together with other national railway agencies). ÖBB night trains typically feature three types of carriages: seats, couchettes, and sleepers. Seats are for the bravest, while couchettes and sleepers provide 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.
For the next 7 dates with connections, the cheapest offer starts at 25 EUR. Check our connection pages below for all availabilities!