Yes, Orlando International Airport (MCO) is consistently one of the busiest airports in the United States and the world. In 2026, it often ranks in the top 10 for total passenger traffic, primarily driven by the massive "theme park tourism" industry centered around Disney World, Universal, and SeaWorld. On any given day, MCO can handle over 150,000 passengers. It is particularly famous for its long security lines, which can be unpredictable; the "MCO TSA" is a frequent topic of traveler warnings. The airport recently expanded with the opening of Terminal C, a high-tech facility that serves many international and premium carriers, but the main "North Terminal" remains a hub of activity for major domestic airlines like Southwest and Delta. For travelers, this means you should arrive at least 3 hours before your flight, even if you have TSA PreCheck, especially during peak holiday weeks, spring break, or weekend "turnover days" for cruises at Port Canaveral, when the airport reaches its maximum capacity.