If a flight segment is waitlisted (often designated as "WL" or "HL" in your reservation), it means that the specific cabin or seat you requested is currently full, and you are in a "holding pattern" for a confirmed spot. This most commonly occurs when you are using frequent flyer miles for an upgrade or an award ticket where the airline has not yet released enough "award inventory." Being waitlisted is essentially an "intention to travel" on that flight; if another passenger cancels or the airline releases more seats, your status will change from "Waitlisted" to "Confirmed" (HK). In 2026, airline algorithms manage these lists based on your loyalty status, ticket price, and the time of the request. It is important to monitor your email or app, as once a waitlist clears, you often have a limited "ticketing time limit" (usually 24–72 hours) to finalize the booking. If the waitlist does not clear by 24 hours before departure, the request is typically cancelled, though some airlines allow you to move to the "airport standby" list on the day of travel.