In 2026, Delta Air Lines uses a tiered boarding process consisting of approximately 8 to 10 distinct groups to ensure a smooth flow onto the aircraft. The process begins with Pre-Boarding (for those needing extra time or assistance), followed by Delta One or First Class. Next come the loyalty tiers: Diamond Medallion members and those in Delta Premium Select (on international flights), followed by Delta Comfort+. The "Sky Priority" group includes Gold and Platinum Medallions. After the priority groups, the "Main Cabin" is broken down into Main Cabin 1, 2, and 3, which are assigned based on your seat location and SkyMiles status. The final group to board is Basic Economy. This structured system helps manage overhead bin space and ensures that those who have paid for premium cabins or earned elite status receive their promised priority benefits.