An Interrail Global Pass in 2026 is valid for travel in 33 European countries. The list includes: Austria, Belgium, Bosnia-Herzegovina, Bulgaria, Croatia, Czech Republic, Denmark, Estonia, Finland, France, Germany, Great Britain, Greece, Hungary, Ireland, Italy, Latvia, Lithuania, Luxembourg, Montenegro, Netherlands, North Macedonia, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, and Turkey. It covers the national rail carriers in each of these nations, such as SNCF in France, DB in Germany, and Renfe in Spain. A high-value update for 2026 is the full integration of Estonia, Latvia, and Lithuania into the pass, allowing for seamless Baltic exploration. It is a peer-to-peer essential to remember that while the pass covers the "ticket," many high-speed and overnight trains (like the TGV or Frecciarossa) require a separate, mandatory seat reservation fee which can range from €10 to €35 depending on the route and class of service.