Swiss Railways (SBB/CFF/FFS) operates a train from Basel to Saarbrücken hourly. Tickets cost $30 - $50 and the journey takes 1 h 18 min. French Railways (SNCF) also services this route every 4 hours. Alternatively, BVB operates a bus from Basel to Saarbrücken every 15 minutes. Tickets cost $3 - $5 and the journey takes 12 min. 2 other operators also service this route.
From Basel SBB train to Strasbourg then train to Saarbrücken Hbf. 4 h SFr 69. From Basel, Brausebad line 50 bus to Basel EuroAirport, EuroAirport Basel, bus to Freiburg, then bus to Saarbrücken. 6 h 47 min SFr 30. From Basel drive to Saarbrücken. 2 h 28 min SFr 34.