What is the cabin altitude of the A350 vs 787?

The Boeing 787 has a design cabin altitude of 6,000 ft, the A350 is set even lower at 5,500 ft. The cabins are pressurized and maintain this level regardless of cruising altitude, be that 30,000 ft or 40,000 ft.



Both the Airbus A350 and the Boeing 787 Dreamliner are revolutionary because they are constructed largely of carbon-fiber-reinforced polymers, which allow for higher cabin humidity and lower cabin altitudes compared to traditional aluminum aircraft. A lower cabin altitude means more oxygen in the blood, which significantly reduces the symptoms of jet lag and fatigue. The Boeing 787 typically maintains a cabin altitude of approximately 6,000 feet when the aircraft is cruising at 40,000 feet. The Airbus A350 performs similarly, often cited at a maximum cabin altitude of 6,000 feet, though in some flight conditions, it can be tuned as low as 5,000 to 5,500 feet. In contrast, older metal-skinned aircraft like the Boeing 777 or 747 usually have cabin altitudes closer to 8,000 feet. While the difference between 6,000 and 8,000 feet might seem small, it represents a significant increase in partial oxygen pressure. Passengers on both the A350 and 787 generally report feeling more hydrated, having fewer headaches, and feeling more refreshed upon arrival, making these "next-gen" wide-body jets the preferred choice for ultra-long-haul travel.

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Based on that knowledge, the 787 is pressurized to a maximum cabin altitude of 6,000 feet. In cooperation with Denmark Technical University, Boeing challenged the assumption that simply increasing humidity would alleviate complaints about dryness on airplanes.

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The Bottom Line: The Airbus A350-900 and Boeing 787-9 are very similar aircraft, suited for similar missions. As one would expect, the slightly larger A350-900 has a seat-mile cost advantage, while the 787-9 has an advantage in cost per block hour. These aircraft are competitive, and nearly tie in economic performance.

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On an Airbus A350, you can be flying at 35,000 to 40,000 feet, but the cabin will be at around 5,500 feet. (On a conventional aluminium aircraft, the cabin will be around 8,000 feet.) This helps with the effects of jet lag and how you feel after a flight too. It's less fatiguing.

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The reason planes cruise at high altitudes is that they burn less fuel and can fly faster, as the air is less dense. At 30,000 feet and higher, it is also possible for aircraft to avoid weather systems, making it more comfortable onboard.

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While both aircraft have much quieter cabins than their competitors, the A350 definitely feels a lot quieter than the 787, no matter which part of the plane you're sitting in. The A350 is in fact the quietest twin-engined aircraft in the skies. The only plane quieter is it's double-deckered older brother, the A380.

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The 787 was the first major commercial aircraft to use carbon fiber composite components in the fuselage and wing construction. These make the aircraft lighter but still offer high strength. New, more efficient engines. The 787 is designed to take either the General Electric GEnx or the Rolls-Royce Trent 1000 engine.

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1 Airbus A380 The Airbus A380 is the largest commercial passenger aircraft in the world, as well as the quietest widebody airliner currently flying. The A380's double-deck design and advanced noise-cancellation technology make it one of the quietest airliners in the skies.

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The highest altitude a plane can fly is largely determined by the type of aircraft, as well as the atmospheric conditions at the time. Commercial airliners typically fly at altitudes between 30,000 and 40,000 feet, but some experimental aircraft have been known to reach flight levels as high as 65,000 feet.

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