In the world of airline ticketing (GDS), Class Z most commonly refers to a discounted or promotional Business Class fare. Airlines use a variety of "letter codes" to differentiate between price points within the same cabin; while 'J' or 'C' often represent full-fare Business Class, 'Z' is used for non-refundable, restricted, or advanced-purchase business tickets. Passengers in Class Z receive the same physical seat and service as those in full-fare business, but they may face higher fees for flight changes, lower "miles" earning rates, or more restrictive refund policies. On some specific airlines, 'Z' can also be used for "Staff Travel" or "Sub-Load" tickets, where employees fly on a space-available basis. In 2026, with the rise of "unbundled" business class, 'Z' fares are frequently used for "Business Lite" products that might exclude lounge access or seat selection. Always check the fare basis code on your ticket receipt to understand the specific rules associated with your 'Z' booking, as they can vary significantly between carriers.