Let’s take a look at the skies and see just how high airplanes fly. For most commercial flights, the sweet spot lies between 30,000 and 40,000 feet (12.19 km) above sea level, with 35,000 feet ...

Source: Jim Gregory, Professor of Mechanical & Aerospace Engineering at Ohio State University Footage courtesy: Stefano Ciciarello How do massive airplanes fly ... an area of high air pressure ...