Generally, Interrail passes do not cover city buses, trams, or metros; however, they do include specific regional and international bus lines operated by national railway companies. In 2026, this most notably includes the ÖBB Intercitybus in Austria (connecting Graz and Klagenfurt) and various bus routes in countries like the Czech Republic and Switzerland where the rail network is supplemented by road transport. Furthermore, many "Interrail Benefits" in 2026 provide significant discounts (usually 10% to 25%) on private bus carriers like FlixBus or RegioJet in select regions. While your pass is primarily a rail ticket, it acts as a "gateway" to a broader transport ecosystem. Always check the Rail Planner App and use the "Pass Network Only" filter to see exactly which bus segments are included. It is crucial to remember that even if a bus is covered, you may still need to pay a small seat reservation fee, especially on popular cross-border routes during the peak 2026 summer season.