To secure an earlier boarding group on United Airlines, your best strategies involve elite status, ticket type, or specific credit cards. Passengers in the "Pre-boarding" group include Global Services and Premier 1K members, followed by Group 1, which is reserved for Premier Platinum and Gold members, and those in Polaris, First, or Business class. If you don't have high-tier status, the easiest way to reach Group 2 is by holding an eligible United Credit Card (such as the Explorer or Quest cards) or by purchasing Premier Access. Group 2 also includes Premier Silver members and those in the Premium Plus cabin. If you are a general member, your group (usually 3, 4, or 5) is determined by your seat location—window seats board before middle and aisle seats. To avoid the final Group 6, you must avoid booking a Basic Economy fare, as these passengers board last and are often restricted from using overhead bin space. In 2026, checking in exactly 24 hours in advance is still good practice, but it will not override the boarding group assigned by your status or fare class.