What is the cabin altitude of a 787?

Based on that knowledge, the 787 is pressurized to a maximum cabin altitude of 6,000 feet.



The Boeing 787 Dreamliner is engineered to maintain a maximum cabin altitude of 6,000 feet (1,828 meters), which is significantly lower than the 7,500 to 8,000 feet found on most conventional aluminum-bodied aircraft. This is possible because the 787's fuselage is constructed from carbon-fiber reinforced plastic (CFRP) composites, which are more resistant to fatigue and can handle higher internal pressure differentials without the risk of structural failure over time. By keeping the "altitude" lower, the air remains denser and contains more oxygen, which Boeing's research indicates helps mitigate common "in-flight ills" like headaches, muscle aches, and fatigue. In 2026, the 787 remains a favorite for long-haul travelers because this lower altitude, combined with higher humidity levels and advanced air filtration, allows passengers to arrive at their destinations feeling more rested and less affected by jet lag compared to older aircraft models.

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One of the promises of the 787 was improved passenger comfort. There are several improvements in this area, including higher cabin air pressure. The cabin is pressurized at 6,000 feet, as opposed to 8,000 feet on most other aircraft, including the 777.

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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.

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An exclusive in-flight The A350's cabin is also the quietest on a twin-aisle aircraft, and its advanced technology delivers the highest possible air quality with optimised cabin altitude (6,000 ft.), optimum temperature and humidity, with the air being renewed every two to three minutes.

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The 777's cabin altitude is 2430 meter (8000 ft) when it's cruising at max altitude. Wolfram Alpha tells us that a cubic meter of air weighs 0.96 kg at that pressure. DimensionInfo shows that the 300ER is 73.9 m long and 5.86 m wide. So that's about 1900 kg of air for the cylinder.

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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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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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Flying higher gives lower fuel burn if you can get up there, so airlines take advantage. There are of course weight, wind and temperature dependencies, so every flight is different. The 787 and A350 also have a higher service ceiling compared to 777 and A330.

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Re: 777 and 787 common type rating Pilots can fly both, even on the same day. That's what the common type rating enables. If you required differences to go between them after the initial differences course, it would not be a common rating.

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The pressurisation system of all series of 737 ensures that the cabin altitude does not climb above approx 8,000ft in normal operation.

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Ecologically, and compared to previous generation wide-body aircraft, the Dreamliner has avoided more than 85 billion pounds of carbon emissions, achieved 20-25% greater fuel efficiency, realized 20-45% more cargo revenue capacity, and produced a 60% smaller airport noise footprint.

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Smoother Ride Technology: Sensors on the 787 sense and dampen turbulence for a more comfortable ride and less motion sickness. Large overhead bins: There's space for your carry-on near your seat. Better seating options: The 787 offers the latest in seat comfort and technology.

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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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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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Besides skinny seats, slim lavatories and overstuffed overhead bins, here's another reason to loathe the back of the airplane: It's noisier than the front. The noise inside an airplane is a choice airlines and airplane manufacturers make.

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Passengers comfort Generally speaking, the Boeing 777 offers a more comfortable passenger experience. This is because it is somewhat larger than the 787 and has higher capacity, leading to more room in terms of seating comfort.

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The typical lifespan of airliners The composite-driven Boeing 787 Dreamliner is designed for 44,000 flight cycles. These jets can theoretically last several decades with an average of two flight cycles a day.

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The normal cruising altitude for commercial airplanes is between 33,000 and 42,000 feet. This translates to nearly eight miles above sea level. This high altitude gives commercial flights the ability to have maximum fuel efficiency and reach high speeds because of the thin air.

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From a practical point of view, 'high altitude' operations are taken to be those above FL250, which is the altitude at above which aircraft certification requires that a passenger cabin overhead panel oxygen mask drop-down system has to be installed.

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