The SNCF has suggested that buying train tickets early could yield lower prices for holiday travel. However, an analysis reveals that prices can actually rise significantly as Christmas approaches. A study by a comparison site showed that average ticket prices increased from 95 euros to 140 euros for popular routes. While the SNCF advises consumers to log on promptly at 6 AM on sale days, reports indicate that affordable tickets are hard to find, especially for high-demand routes.

Source