Six first class suites occupy the forward section, followed by 52 business class seats, 40 premium economy seats, and 140 economy seats. Singapore Airlines carries 253 passengers with 67 business class seats, approximately 26%. The additional fuel the ULR variant carries to reach 10,000 nautical miles adds significant weight, which must be offset elsewhere in the aircraft's payload budget. Qantas cannot carry 400 passengers and 5,283 gallons (20,000 liters) of additional fuel on the same airframe within the A350-1000's maximum takeoff weight. The Qantas nonstop flight covers the same distance in approximately 20-22 hours with no connection, no second takeoff and landing, and no time spent in a transit terminal.