Bus and metro tickets are separate products. Metro: €0.60 single, €2.50 for 24 hours. Buses (OASTH): €0.60 urban single, €0.80 suburban, €2.50 for 24 hours; the airport lines (01X / 01N) have their own €2 fare (2026).
www.thessmetro.grWorking churches such as Agios Demetrios and Agia Sophia are free to enter; dress modestly and avoid visiting during services.