German Railways (DB) operates a train from Karlsruhe to Europa-Park hourly. Tickets cost $22 - $35 and the journey takes 27 min. German Railways (DB) also services this route every 30 minutes. Alternatively, FlixBus operates a bus from Karlsruhe to Europa-Park 6 times a week. Tickets cost $6 - $11 and the journey takes 1 h 20 min.
From Karlsruhe Hbf train to Offenburg, train to Ringsheim, then taxi to Europa-Park. 1 h 12 min 45€. From Karlsruhe bus to Rust then walk to Europa-Park. 1 h 36 min 8€. From Karlsruhe drive to Europa-Park. 58 min 13€.