Yes, the PostBus (PostAuto) network is fully included in the Swiss Travel Pass. This means you can enjoy unlimited, "free" travel on the iconic yellow buses that connect Switzerland's remote alpine villages and mountain passes. The only exception is a small "supplement" or seat reservation fee required on a few specific mountain routes, such as the Palm Express (St. Moritz to Lugano), but the base fare is entirely covered. This integration is part of the Swiss "all-in-one" transport philosophy, where a single pass covers trains, buses, boats, and even public transport in over 90 cities. For those using a Half Fare Card, you receive a 50% discount on all PostBus fares. In 2026, the PostBus remains an essential tool for hikers and tourists looking to reach the scenic trailheads that larger trains cannot access.