The following railway companies accept Interrail Passes on board their services:

Public Ferry Country Train companies transport companies companies ÖBB, plus the private train S-Bahn: Vienna and Austria companies ROeEE / - Innsbruck GYSEV, Westbahn and RegioJet

Belgium NMBS / SNCB - -

Bosnia ZFBH - - Herzegovina

Bulgaria BDZ - -

Croatia HZ - -

ČD, and private train companies: LEO Czech Republic - - Express and RegioJet

DSB, and private train companies: Denmark Arriva, DSB S-Tog, DSB-Øresund Fjord Line - and Nordjydske Jernbaner

VR and private bus companies: Veljekset Finnlines, Tallink Finland - Salmela and Net-matkat Silja Oy, Viking Line

France SNCF - Irish Ferries

Deutsche Bahn (DB) and various private Germany companies (see pdf-document for Finnlines S-bahn complete list)

Great Britain National Rail and several others Irish Ferries, Stena - Line

Greece TRAINOSE - Superfast Ferries, Minoan Lines, Grimaldi Lines, Blue Star Ferries

MÁV-START and private railway Hungary - - company: GySEV/Raaberbahn

Irish Ferries, Stena Ireland Irish Rail / NI Railways - Line

Grimaldi Lines, Trenitalia and Trenord, Leonardo Superfast Ferries, Italy Express (Roma Termini to Fiumicino - Blue Star Ferries, Airport) and Micotra Minoan Lines

Lithuania Lietuvos Gelezinkeliai

Luxembourg CFL - -

FYR Macedonia MZ - -

Montenegro ŽCG - -

NS and private railway companies: The Netherlands Arriva, Connexxion, Keolis, Syntus, Stena Line - Veolia and DB Regio

Norway NSB Fjord Line -

PKP and local-government run Poland companies: Koleje Dolnoslaskie and Finnlines - Przewozy Regionalne

Portugal CP - -

Romania CFR - -

Serbia SV (Serbian Railways) - -

ZSSK, and private railway companies: Slovakia - - LEO Express and RegioJet

Slovenia SZ - -

Spain RENFE including FEVE Balearia, Grimaldi - Lines SJ and private railway companies: Ländstrafiken in Arlanda Express, Arriva, Inlandsbanan, innlines, Tallink Silja Norbotten, Sweden JLT, Norrtåg, Skånetrafiken, Oy, Viking Line, Veljekset Salmela, Tågkompaniet, Värmlandstrafik and Destination Gotland Net-matkat Västtrafik.

Switzerland SBB/CFF/FFS and various private - - railway companies. Turkey TCDD