Zone 2 priority boarding is a high-tier boarding group typically reserved for Premium Cabin passengers and top-tier frequent flyers. On major airlines like Delta, Zone 2 includes passengers in Premium Select (International Premium Economy) and "Diamond Medallion" elite members. On other carriers, Zone 2 often follows immediately after "Pre-boarding" (for those needing assistance) and "Zone 1" (First Class). Being in Zone 2 is a significant perk because it virtually guarantees you will find overhead bin space for your carry-on luggage before the plane becomes crowded. In 2026, airlines have become increasingly strict about these zones to prevent "gate lice"—passengers who crowd the boarding area before their group is called. If you have a co-branded airline credit card or mid-tier elite status, you are more likely to be in Zone 3 or 4, making Zone 2 a prestigious category that usually requires either a high-fare ticket or a long-term commitment to a specific airline's loyalty program.