Heathrow Ranks Second Globally for International Scheduled Capacity

London Heathrow is the world’s second-busiest international airport by scheduled capacity in September 2026, with more than 4.3 million seats scheduled. London Heathrow Airport ranks as the world’s second-busiest international airport by scheduled capacity in September 2026, behind Dubai International Airport. More than 4.3 million seats are scheduled at Heathrow during the month. Heathrow handled approximately 84.5 million passengers in 2025. Around 40 million passengers passed through its terminals during the first half of 2026, although the airport has experienced a decline in passenger traffic in recent months.