The Transalpin is a EuroCity express train linking Zürich (Switzerland) with Graz (Austria) via Liechtenstein.

The train takes 9 h 34 min from Zürich to Graz (9 h 35 min in the other direction) and stops at Sargans, Buchs SG, Feldkirch, Bludenz, Langen am Arlberg, St. Anton am Arlberg, Landeck-Zams, Imst-Pitztal, Ötztal, Innsbruck, Jenbach, Wörgl, Kirchberg in Tirol, Kitzbühel, St. Johann in Tirol, Saalfelden, Zell am See, Schwarzach-St. Veit, St. Johann im Pongau, Bischofshofen, Radstadt, Schladming, Stainach-Irdning, Liezen, Selzthal, St. Michael in Obersteiermark, and Leoben.

In the timetable period 2014/2015 the EC Transalpin is composed of one first class open panorama coach of the SBB CFF FFS, the other coaches are of the ÖBB, including a dining car and a combine baggage car with first class seats, allowing to transport bicycles.

The initial train numbers of the Transalpin were TS 11/12, and its original route was Wien Westbf to Zürich HB.

[6] In 1980, a trip on the Transalpin from Zürich to Vienna was featured in "Changing Trains", the final episode in Series 1 of Great Railway Journeys of the World, a BBC TV travel documentary.

The "Changing Trains" trip, which formed part of a longer journey from Paris to Budapest, was also described in the book published to complement the TV series.

At times when there were interruptions on the Arlberg line due to railway construction work, or as a consequence of natural disasters – such as avalanches and debris flows, or between August and December 2005 after storm damage – the Transalpin was substantially diverted between Salzburg and Bregenz via München Hbf, the Munich–Buchloe and the Buchloe–Lindau railways.

Initially, the Transalpin was operated by a four-member fleet of four-car Class 4130 [de] electric multiple units, which had been procured specifically for the purpose.

On the ascending grades of the Arlberg railway, the eastbound locomotive-hauled train often received assistance from a pilot or banking locomotive.

Between 1995 and 2009, this train used the SBB WRm with pantograph, for plugging electricity directly on the 15 KV AC low frequency catenaries, during longs stops for change locomotives in Buchs SG and Zürich HBF (not electricity in others coaches during changing locomotives).