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Heidelberg is 17 minutes from Mannheim, by S-bahn regional train, or 11 minutes on hourly InterCity Express (ICE) trains. These sleek, super-high-speed trains reach 280 kph (174 mph), so travel time between Frankfurt Airport and Mannheim is a half hour. From Heidelberg to Stuttgart, direct InterCity (IC) trains take 40 minutes. Local services link many of the smaller towns.