For example, there are often substantial discounts on train tickets through SNCF if you are 12-25 years old (such as the Jeune 18-27 railcard). There are even discounts for bus tickets and bike rentals. If you're looking for even cheaper options, consider carpooling. The popular website, Covoiturage makes finding rides across France easy and affordable. A trip from Paris to Lyon, about 60 Euros on the train, can be half as much if you catch a ride with someone through covoiturage.