Hellenic Train is the main passenger rail operator in Greece, serving intercity, regional, and suburban routes. Its services include InterCity trains on the Athens to Thessaloniki corridor, regional trains around Larissa, Volos, Kalambaka, and Florina, and Proastiakos suburban services in the Athens, Thessaloniki, and Patras areas. Key stations include Athens Railway Station, Thessaloniki, Larissa, Piraeus, Kiato, and Athens Airport. Travelers can use Rail Monsters to search selected Hellenic Train departures, compare schedules, and book train tickets online for domestic rail travel in Greece.