Interrailing can be significantly more affordable if you utilize several strategic "budget hacks." First, avoid high-speed and night trains that require mandatory (and often expensive) seat reservations; instead, filter for "no reservation required" regional trains in the Rail Planner app. While slower, they offer beautiful scenery and more flexibility. Second, focus your travel on Central and Eastern Europe (e.g., Poland, Hungary, Romania), where the "cost of living" and incidental train fees are much lower than in Western Europe. Third, consider a Flexi Pass rather than a Continuous Pass; if you plan to stay 3–4 days in each city, you only need to pay for the specific days you are actually moving between destinations. Finally, take advantage of Interrail Pass benefits, which include discounts on ferries, city cards, and hostels that many travelers overlook. In 2026, many "Pass-only" deals for hostels can save you up to 15%, which adds up over a multi-week trip. Walking or using local public transport instead of taxis within cities also keeps your daily spend low.