The seating capacity of an Airbus A380 varies significantly depending on the airline's chosen configuration, but it typically ranges from 450 to 853 seats. Most "legacy" carriers like Emirates, British Airways, and Singapore Airlines operate a three-class or four-class layout (First, Business, Premium Economy, and Economy), which usually averages between 480 and 550 seats. Emirates, the largest operator of the "Superjumbo," even has a high-density two-class version (Business and Economy) that seats 615 passengers. The absolute maximum capacity allowed under safety certification is 853 seats, which would be an all-economy configuration, though no major airline currently uses this. The A380 is unique because its double-deck design allows for about 40% more floor space than a Boeing 747-8, enabling luxury features like onboard showers and lounge bars while still carrying a massive number of passengers.