⚡ In short: The single biggest way to save is booking Super Sparpreis from €17.99 early. Add a Probe BahnCard 25 (€22.99 / 3 months) for 25% off everything. Avoid Flexpreis and peak Friday/Sunday travel. Here are 10 proven tips that cut costs by up to 70%. Tip 1: Book Super Sparpreis as Early as