Airports derive revenue from two primary streams: aeronautical and non-aeronautical. Aeronautical revenue comes directly from airlines and passengers through landing fees, terminal space rentals, and "Passenger Facility Charges" (PFCs) baked into ticket prices. However, in 2026, non-aeronautical revenue often proves more lucrative. This includes income from retail and duty-free shops, food and beverage concessions, and advertising. Parking and ground transportation (including fees from Uber/Lyft and car rentals) contribute significantly, often accounting for over 40% of non-aeronautical income. Airports also act as real estate developers, leasing land to hotels, logistics hubs, and office complexes. Major hubs like Dubai (DXB) or Singapore (SIN) have essentially become "commercial cities" where the terminal is a high-end shopping mall that just happens to have airplanes attached, ensuring the airport remains profitable even when flight volumes fluctuate.