Medically reviewed by Arno Kroner, DAOM Altitude sickness occurs when air pressure and oxygen levels are reduced at a higher ...

Continuing to higher altitudes without proper acclimatization can lead to potentially serious, even life-threatening illnesses. The major cause of altitude illnesses is going too high too fast. Given ...

Cruising altitude isn't a fixed number — many factors go into computing this for every flight — but there is a good reason why ... Why Planes Fly at High Altitudes Flying at higher altitudes ...