Large hubs carry a little over two-thirds of US passengers, a share that has stayed roughly flat since the turn of the century. Each year's tiers are set by airports' shares of that year's national passengers.
What this shows: The chart covers 2000 to 2024. It plots Large Hub, Medium Hub, Small Hub and Non-Hub on a vertical axis of Share of national passengers (%). Latest values: Large Hub 68.3; Medium Hub 19.4; Small Hub 9.4; Non-Hub 3. Data run through 2024.