Traveling between Berlin and Aachen offers several train services, including the high-speed ICE and the regional RE trains. The ICE service is the fastest option, whisking you from Berlin to Aachen in just about 4 hours, with comfortable seating and onboard amenities to enhance your journey. For travelers on a budget, the RE trains provide a more economical option, taking approximately 6 hours but still offering a scenic route through the heart of Germany. Both services ensure a smooth travel experience, with frequent departures and convenient connections.