What is the highest altitude before needing oxygen?

Importance to Members And that at cabin altitudes above 14,000 feet pilots must use oxygen at all times. And that above 15,000 feet each occupant of the aircraft must be provided supplemental oxygen. All of this is spelled out in Federal Aviation Regulations Part 91.211.



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High altitude = 1,500–3,500 metres (4,900–11,500 ft) Very high altitude = 3,500–5,500 metres (11,500–18,000 ft) Extreme altitude = above 5,500 metres (18,000 ft)

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How high can you fly without a pressurized cabin? Most planes flying today use a cabin pressure control system that ensures safe and normal breathing for everyone onboard during flight. The general rule is that planes should have cabin pressurization when they go above 10,000 to 14,000 feet.

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