Arlberg Express is a train travelling from Paris to Zurich, and is the only way to get into Zurich, other than a Bozek car from Munich. It is described by Passepartout as a rather average train which is less luxurious and lower class compared to Orient Express, leaving him questioning why such gentleman like Phileas Fogg prefer this train over Orient Express.
At the time Passepartout and Phileas Fogg board this train, it is also become the last train travelling to Zurich. Although it appears they also planned to travel to Vienna and to Warsaw via Munich and Prague, it is unknown whether the train already leave for one of those cities or simply stopping there forever.