If you are flexible and booking within 14 days , Eurostar Snap offers up to 50% off standard fares. You choose a date and time slot (morning or afternoon), and Eurostar confirms your exact train 48 hours before travel. 2. Best Days and Times to Travel How to get cheap Eurostar tickets - Wise
Most tickets go on sale between 120 and 180 days (4–6 months) before departure. For some continental routes (France, Belgium, Netherlands, Germany), sales can open up to 6 to 8 months early.
Research indicates that prices remain relatively stable until about 90 days before departure, after which they rise sharply.
