For 2026 travel, the "golden rule" at Amsterdam Schiphol (AMS) is to arrive 3 hours before a non-Schengen (intercontinental) flight and 2 hours before a Schengen (European) flight. While Schiphol has moved past the extreme "queue crises" of previous years, the airport is now implementing strict "no-earlier-than-4-hours" rules for some flights to prevent terminal overcrowding. This means if you arrive 6 hours early, you might not be allowed to enter the check-in hall. To save time, you should book a "Security Time Slot" online for free; this allows you to bypass the general security line at a pre-arranged time. Schiphol now uses high-tech CT scanners that allow you to keep liquids and electronics in your bag, which has significantly sped up the process. However, the airport is large, and a walk to the furthest "M" or "G" gates can take 20 minutes. If you have a morning flight during a school holiday, adding an extra 30 minutes to your arrival plan is a wise insurance policy against unexpected surges.