Atlanta Vs. Dallas/Fort Worth: Which US Mega-Hub Handles More Passengers In 2026?

The United States is the world’s largest aviation market by a stretch. A total of 890.1 million arriving and departing passengers last year saw the US trump the next biggest, China with 776.1 million, by well over 100 million passengers, according to data from the International Air Transport Association (IATA). The UK, which was the third-busiest country for passenger traffic, then recorded just 269.7 million people boarding and disembarking flights over the course of 2025, for context. Naturally, supporting such vast numbers of fliers in the US requires a string of mega-hubs.