Why Airlines Don't Fly Higher Than 40,000 Feet?

*Why Airlines Don't Fly Higher Than 40,000 Feet? | The Ordinary Mystery* Most commercial airplanes cruise around 35,000 to 40,000 feet — but why stop there? In this video, we explain why airliners don’t simply fly higher, and how fuel efficiency, thin air, cabin pressure, and the dangerous “Coffin Corner” all shape the altitude of modern flights. *Topics covered in this video:* • Why airplanes don’t fly lower • Why thinner air improves fuel efficiency • What the “Coffin Corner” means • Why cabin pressure matters for passengers • Why 35,000–40,000 feet is the practical sweet spot *Chapters:* 0:00 Intro 1:08 Chapter 1: So Why Don’t Airplanes Fly Lower? 4:02 Chapter 2: So Why Don’t Airplanes Fly Even Higher? 6:16 Chapter 3: The Problem Engineers Never Like to Think About 8:24 Chapter 4: The Exceptions and the Rule 9:54 Outro This video is made for anyone curious about aviation, airplanes, flight physics, airline travel, and the hidden engineering behind everyday flights. *If you are searching for:* why planes fly at 35000 feet airplane cruising altitude why planes don’t fly higher coffin corner aviation jet stream airplane cabin pressure flight physics this video will give you a clear and simple look at why commercial airplanes fly where they do — and why higher is not always better.