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Why Planes Fly at 35,000 Feet

Six miles above Earth, the air is minus 54C and unbreathable - yet 35,000 feet is the ultimate sweet spot where physics, fuel efficiency, and flight safety align.

13 hours ago

8 Min Read21 Slides
  1. Airbus A350-900 widebody airliner climbing toward cruising altitude
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Six miles above Earth, the air is minus 54C and unbreathable - yet 35,000 feet is the ultimate sweet spot where physics, fuel efficiency, and flight safety align.

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©Wikimedia / Markus Eigenheer

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